GainMaker Node Installation and Operation Guide · Este símbolo significa indicaciones importantes...

GainMaker Node Installation and Operation Guide

For Your Safety

Explanation of Warning and Caution Icons

Avoid personal injury and product damage! Do not proceed beyond any symbol until you fully understand the indicated conditions.

The following warning and caution icons alert you to important information about the safe operation of this product:

You may find this symbol in the document that accompanies this product. This symbol indicates important operating or maintenance instructions.

You may find this symbol affixed to the product. This symbol indicates a live terminal where a dangerous voltage may be present; the tip of the flash points to the terminal device.

You may find this symbol affixed to the product. This symbol indicates a protective ground terminal.

You may find this symbol affixed to the product. This symbol indicates a chassis terminal (normally used for equipotential bonding).

You may find this symbol affixed to the product. This symbol warns of a potentially hot surface.

You may find this symbol affixed to the product and in this document. This symbol indicates an infrared laser that transmits intensity-modulated light and emits invisible laser radiation or an LED that transmits intensity-modulated light.

Important Please read this entire guide. If this guide provides installation or operation instructions, give particular attention to all safety statements included in this guide.

Notices

Trademark Acknowledgments

• Cisco, the Cisco logo, Cisco Systems, the Cisco Systems logo, Scientific Atlanta, GainMaker, and SciCare are trademarks or registered trademarks of Cisco Systems, Inc. and/or its affiliates in the U.S. and certain other countries.

• All other trademarks mentioned in this document are property of their respective owners..

Publication Disclaimer Cisco Systems, Inc., assumes no responsibility for errors or omissions that may appear in this publication. We reserve the right to change this publication at any time without notice. This document is not to be construed as conferring by implication, estoppel, or otherwise any license or right under any copyright or patent, whether or not the use of any information in this document employs an invention claimed in any existing or later issued patent.

Copyright © 2008 Cisco Systems, Inc. All rights reserved. Printed in the United States of America.

Information in this publication is subject to change without notice. No part of this publication may be reproduced or transmitted in any form, by photocopy, microfilm, xerography, or any other means, or incorporated into any information retrieval system, electronic or mechanical, for any purpose, without the express permission of Cisco Systems, Inc.

Contents

744490 Rev B Table of Contents iii

Safety Precautions .....................................................................................................................................vi Précautions de Sécurité.......................................................................................................................... viii Precauciones de Seguridad........................................................................................................................ x Precauzioni di Sicurezza...........................................................................................................................xii Sicherheitsmaßnahmen ...........................................................................................................................xiv Product Compliance.................................................................................................................................xvi Laser Safety .............................................................................................................................................xvii

Chapter 1 Introducing the GainMaker Node Overview........................................................................................................................1-1 Description of the GainMaker Node ..........................................................................1-2 Types of GainMaker System Amplifiers....................................................................1-5 Accessories .....................................................................................................................1-6 Illustrations ....................................................................................................................1-8 Block Diagrams ...........................................................................................................1-10

Chapter 2 Installing and Configuring the GainMaker Node Overview........................................................................................................................2-1 Opening and Closing the GainMaker Node Housing .............................................2-3 Installing the GainMaker Node ..................................................................................2-5 Connecting the Fiber Optic Cable to the Node.........................................................2-7 Attaching the Fiber Connectors ................................................................................2-10 Stowing the Fiber Management Tray.......................................................................2-12 attaching the Coaxial Connectors .............................................................................2-13 Mounting the GainMaker Node ...............................................................................2-15 Installing Accessories .................................................................................................2-18 Installing the Equalizers.............................................................................................2-19 Configuring the GainMaker Node with Major Modules ......................................2-25 Removing and Reinstalling the Optical Modules ..................................................2-28

Continued on next page

Contents, Continued

iv Table of Contents 744490 Rev B

Chapter 3 Changing a GainMaker Amplifier to a GainMaker Node Overview........................................................................................................................3-1 Installing the Upgrade Kit ...........................................................................................3-2

Chapter 4 Balancing and Setup of the GainMaker Node Overview........................................................................................................................4-1

Section A - Balancing Preparation Overview........................................................................................................................4-2 Preparing for Balancing ...............................................................................................4-3 Understanding Switch 1 Functions ............................................................................4-4 Verifying Amplifier Input Signal................................................................................4-8

Section B - Forward Path Balancing Procedures Overview........................................................................................................................4-9 Selecting the Proper Procedure for Forward Path Balancing ...............................4-10 Forward Path Balancing for AGC Stations Using Manual Setup Mode .............4-11 Forward Path Balancing for AGC Stations Using Thermal Setup Mode............4-21 Forward Path Balancing for Thermal Stations Using Amplifier Only Compensation Mode ..................................................................................................4-28 Forward Path Balancing Using Trim Networks .....................................................4-32

Section C - Reverse Path Balancing Procedures Overview......................................................................................................................4-34 Preparing for Reverse Path Balancing .....................................................................4-35 Reverse Fiber Link Balancing....................................................................................4-37 Initial Reverse Path Balancing...................................................................................4-42 Completing Reverse Path Balancing ........................................................................4-45

Chapter 5 Troubleshooting Overview........................................................................................................................5-1 Troubleshooting Guide ................................................................................................5-2

Chapter 6 Customer Information Overview........................................................................................................................6-1 Customer Support.........................................................................................................6-2 Returning Products.......................................................................................................6-3


Contents, Continued

744490 Rev B Table of Contents v

Appendix A Technical Information Overview.......................................................................................................................A-1 “Linear” Tilt Charts .....................................................................................................A-2 Forward Equalizer Charts...........................................................................................A-4 Trim Network Response Plots ..................................................................................A-6 Reverse Equalizer Charts..........................................................................................A-10 GainMaker Accessory Part Numbers......................................................................A-13

Glossary ...................................................................................................................................... Glossary-1

Index ..................................................................................................................................................Index-1

Safety Precautions

Protect Yourself From Electric Shock and Your System From Damage! This product complies with international safety and design standards. • Observe all safety procedures that appear throughout this guide, and the safety

symbols that are affixed to this product. • If circumstances impair the safe operation of this product, stop operation and

secure this product against further operation. Safety Symbols

Avoid personal injury and product damage! Do not proceed beyond any symbol until you fully understand the indicated conditions!

You will find this symbol in the literature that accompanies this product. This symbol indicates important operating or maintenance instructions.

You may find this symbol affixed to this product. This symbol indicates a live terminal; the flash points to the terminal device.

You may find this symbol affixed to this product. This symbol indicates a protective ground terminal.

You may find this symbol affixed to this product. This symbol indicates excessive or dangerous heat.

Power Important! The power shunts must be removed before installing the unit into a powered housing. With the shunts removed, it reduces the power surge to the components and F-connectors.

CAUTION:

RF connectors and housing seizure assemblies can be damaged if shunts are not removed from the amplifier before installing or removing the amplifier module from the housing.


vi 744490 Rev B

Safety Precautions, Continued

Enclosure • Do not allow moisture to enter this product. • Do not open the enclosure of this product unless otherwise specified.

Cables • Always pull on the plug or the connector to disconnect a cable. Never pull on the

cable itself. AC Shunt Power Directors

AC shunt power directors are provided with this product. Service

Refer service only to service personnel who are authorized by Scientific-Atlanta.

744490 Rev B vii

Précautions de Sécurité

Protégez-vous Contre les Électrocutions et Protégez Votre Système Contre les Dégâts ! • Ce produit est conforme aux normes internationales de sécurité et de conception.

Respectez toutes les procédures de sécurité qui apparaissent dans ce guide, ainsi que les symboles de sécurité qui sont apposés sur ce produit.

• Si des circonstances affectent la sécurité du fonctionnement de ce produit, arrêtez le fonctionnement et interdisez toute utilisation ultérieure de ce produit.

Symboles de sécurité

Évitez les blessures de personnes et les dégâts matériels ! N’allez pas au-delà d’un symbole tant que vous ne comprenez pas parfaitement les conditions indiquées!

Vous trouverez ce symbole dans la littérature qui accompagne ce produit. Ce symbole indique des instructions importantes de fonctionnement ou de maintenance.

Vous pouvez trouver ce symbole apposé à ce produit. Ce symbole indique une borne sous tension ; l’éclair pointe vers la borne en question.

Vous pouvez trouver ce symbole apposé à ce produit. Ce symbole indique une borne de terre protectrice.

Vous pouvez trouver ce symbole apposé à ce produit. Ce symbole indique une chaleur excessive ou dangereuse.

Alimentation

Important! Les limiteurs de surtension c.a. doivent être retirés avant l’installation de l’appareil dans un boîtier alimenté. Le retrait des limiteurs de surtension c.a. réduit les sautes de tension en direction des composants et des connecteurs F.

Attention:

Les connecteurs RF et les assemblages de montage du boîtier risquent d’être endommagés si les limiteurs de surtension ne sont pas retirés de l’amplificateur avant l’installation ou le retrait du module de l’amplificateur du boîtier.

Suite à la page suivante

viii 744490 Rev B

Précautions de Sécurité, suite

Enceinte • Ne laissez pas d’humidité entrer dans ce produit. • N’ouvrez pas l’enceinte de ce produit, sauf indication contraire. • N’enfoncez pas d’objets dans les orifices de l’enceinte de ce produit.

Câbles • Tirez toujours sur la fiche ou le connecteur pour débrancher un câble. Ne tirez

jamais sur le câble lui-même. Systèmes directeurs de courant dérivé alternatif

Des systèmes directeurs de courant dérivé alternatif sont fournis avec ce produit. Maintenance

Confiez uniquement la maintenance à du personnel de maintenance agréé par Scientific-Atlanta.

744490 Rev B ix

Precauciones de Seguridad

¡Protéjase a Sí Mismo Contra Choques Eléctricos y a Su Sistema Contra Daño! • Este producto cumple las normas internacionales de seguridad y diseño. Observe

todos los procedimientos de seguridad que figuran a lo largo de esta guía y los símbolos de seguridad fijados en este producto.

• Si las circunstancias perjudican la operación segura de este producto, detenga la operación y asegure a este producto contra operación adicional.

Símbolos de Seguridad

¡Evite lesiones personales y daño al producto! No avance más allá de ningún símbolo hasta que entienda plenamente las condiciones indicadas!

Encontrará este símbolo en la literatura que acompaña a este producto. Este símbolo significa indicaciones importantes de operación o mantenimiento.

Tal vez encuentre este símbolo fijado en este producto. Este símbolo indica un terminal activo; el relámpago apunta al dispositivo terminal.

Tal vez encuentre este símbolo fijado en este producto. Este símbolo indica un terminal de puesta a tierra protector.

Tal vez encuentre este símbolo fijado en este producto. Este símbolo indica calor excesivo o peligroso.

Energía

¡Importante! Hay que remover los directores de energía de CA en shunt antes de instalar la unidad en un alojamiento alimentado con energía. Al remover los directores de energía de CA en shunt, se reduce el exceso de corriente a los componentes y los conectores tipo F.

Precaución:

Los conectores de RF y las unidades de retención del alojamiento pueden dañarse si no se remueven los directores de energía de CA en shunt del amplificador antes de instalar o remover el módulo del amplificador del alojamiento.

Continúa en la página siguiente

x 744490 Rev B

Precauciones de Seguridad, Continuación

Alojamiento • No permita que entre humedad en este producto. • No abra el alojamiento de este producto salvo especificación contraria. • No empuje objetos por las aberturas del alojamiento de este producto.

Cables • Tire siempre del enchufe o el conector para desconectar un cable. No tire nunca

del cable en sí. Sistemas directores de corriente derivada alternativa

Sistemas directores de corriente derivada alternativa son suministrados con este producto.

Servicio Refiera el servicio sólo a personal de servicio autorizado por Scientific-Atlanta.

744490 Rev B xi

Precauzioni di Sicurezza

Proteggete Voi Stessi da Possibili Scosse Elettriche e il Vostro Sistema da Possibili Danni! • Questo prodotto è conforme agli standard internazionali sulla sicurezza nonché

agli standard internazionali previsti per la progettazione. Osservare tutte le procedure di sicurezza che compaiono in questa guida e tutti i simboli sulla sicurezza affissi al prodotto.

• Qualora esistessero circostanze che impediscono il funzionamento in condizioni di sicurezza di questo prodotto, interrompere l’uso del prodotto e assicurarlo in modo che non possa essere usato ulteriormente.

Simboli di Sicurezza

Evitare lesioni alle persone e danni al prodotto! Non procedere ignorando eventuali simboli fino a quando non si sono comprese le condizioni indicate dai simboli stessi!

Questo simbolo si trova nella letteratura che accompagna il prodotto. Il simbolo segnala istruzioni importanti per il funzionamento o la manutenzione del prodotto.

Questo simbolo è affisso al prodotto. Il simbolo indica la presenza di un terminale sotto tensione, il fulmine è rivolto verso il terminale.

Questo simbolo è affisso al prodotto. Il simbolo indica un terminale di collegamento a massa di protezione.

Questo simbolo è affisso al prodotto. Il simbolo indica una temperatura eccessiva o pericolosa.

Alimentazione

Importante! Gli adattatori di alimentazione dello shunt CA devono essere rimossi prima di installare l’unità in un alloggiamento alimentato. La rimozione degli adattatori riduce le sovratensioni di alimentazione dei componenti e dei connettori F.

Attenzione:

I connettori RF ed i gruppi di aggancio dell’alloggiamento possono riportare danni in caso di mancata rimozione dall’amplificatore degli adattatori di alimentazione dello shunt CA prima dell’installazione o della rimozione dall’alloggiamento dell’amplificatore stesso.

Continua alla pagina seguente

xii 744490 Rev B

Precauzioni di Sicurezza, Segue

Contenitore • Evitare che entri umidità nel prodotto. • Se non diversamente indicato, non aprire il contenitore del prodotto. • Non inserire oggetti attraverso aperture del contenitore del prodotto.

Cavi Per scollegare i cavi, afferrare tirare sempre la spina o il connettore, non tirare mai il cavo da scollegare.

Addattatori per derivazione CA Gi addattatori per derivazione CA sono forniti assieme a questo prodotto.

Manutenzione La manutenzione deve essere eseguita esclusivamente da personale autorizzato dalla Scientific-Atlanta.

744490 Rev B xiii

Sicherheitsmaßnahmen

Vermeiden Sie durch elektrischen Schlag verursachte Körperverletzungen und schützen Sie Ihr System vor Sachschäden!

• Dieses Produkt entspricht den internationalen Sicherheits- und Design-Standards. Beachten Sie bitte alle in diesem Handbuch beschriebenen Sicherheitsvorkehrungen sowie die an diesem Produkt angebrachten Sicherheitszeichen.

• Bei Eintreten von Umständen oder Bedingungen, die den sicheren Betrieb dieses Produkts beeinträchtigen, ist der Betrieb zu unterbrechen und das Produkt gegen eine weitere Inbetriebnahme zu sichern.

Sicherheitssymbole

Vermeiden Sie Körperverletzungen und Sachschäden! Betreten Sie Räume oder Bereiche, die mit einem dieser Zeichen gekennzeichnet sind, erst nachdem Sie sich mit der Bedeutung der Zeichen und mit den von diesen gekennzeichneten Bedingungen vollständig vertraut gemacht haben!

Sie werden dieses Zeichen vielerorts in den dieses Produkt begleitenden Broschüren bzw. Handbüchern finden. Es weist auf wichtige Betriebs- oder Wartungsanleitungen hin.

Dieses Produkt kann mit diesem Zeichen gekennzeichnet sein. Das Zeichen signalisiert einen spannungsführenden Anschluß; der Blitz weist auf das Anschlußgerät.

Dieses Produkt kann mit diesem Zeichen gekennzeichnet sein. Das Zeichen signalisiert einen geerdeten Anschluß.

Dieses Produkt kann mit diesem Zeichen gekennzeichnet sein. Das Zeichen signalisiert übermäßig hohe oder gefährlich hohe Temperaturen.

Fortsetzung auf der nächsten Seite

xiv 744490 Rev B

Sicherheitsmaßnahmen, Fortsetzung

Energie Wichtig! Vor Installation des Geräts in ein mit Energie versorgtes Gehäuse müssen die WS-Zweigstrom-Interpolatoren entfernt werden. Wenn die WS-Zweigstrom-Interpolatoren entfernt sind, wird der Stromstoß zu den Komponenten und F-Anschlüsse verringert.

VORSICHT:

RF-Anschlüsse und Gehäusebelegungsbaugruppen können beschädigt werden, wenn die WS-Zweigstrom-Interpolatoren nicht vom Verstärker entfernt werden, bevor das Verstärkermodul in das Gehäuse installiert oder aus dem Gehäuse ausgebaut wird.

Gehäuse

• Das Eindringen von Feuchtigkeit in dieses Geräts ist zu vermeiden. • Das Gehäuse dieses Geräts darf nicht geöffnet werden, es sei denn, es wird

anderweitig darauf hingewiesen. • Keine Gegenstände durch die im Gehäuse vorgesehenen Öffnungen in das Gerät

schieben. Kabel

• Die Netzverbindung trennen, indem Sie den Steckverbinder aus der Steckdose ziehen. Auf keinen Fall am Kabel selbst ziehen.

WS-Nebenschluss-Leistungsrichter WS-Nebenschluss-Leistungsrichter sind im Lieferumfang dieses Produkts enthalten.

Wartungsdienst Wartungsarbeiten dürfen nur von dem von Scientific-Atlanta autorisierten Wartungsdienstpersonal durchgeführt werden.

744490 Rev B xv

Product Compliance

Electrical Safety EN 50083-1/A2:1998 and IEC 60065:1998/EN 60065:1998: A notified body has issued a Certificate of Compliance according to the Low Voltage Directive of February 19, 1973. A sample of this equipment has been tested and found to be in conformity with EN 50083-1/A2:1998 and IEC 60065:1998/EN 60065:1998.

Important: The installer should review EN 50083-1/A2:1998 and install this product per EN 50083-1/A2:1998.

Electromagnetic Compatibility EN 50083-2/A1: 1998: According to the provisions of the EMC Directive of May 3, 1989, a sample of this equipment has been tested and found to be in conformity with EN 50083-2/A1: 1998.

FCC Part 76 Subpart K: This equipment has been tested and found to comply with the limits for Part 76 of the FCC Rules. These limits provide reasonable protection against harmful interference when operating this equipment in a commercial environment.

This equipment generates, uses, and can radiate radio frequency energy and, if the user does not install and use this equipment according to the instruction manual, harmful interference to radio communications may occur.

CAUTION:

Any changes or modifications to this equipment not expressly approved by Scientific-Atlanta could void the user’s authority to operate this equipment.

Laser Safety 21CFR: A sample of this equipment has been tested and found to meet the requirements of 21CFR chapter 1, subchapter J.

IEC 825:1993/EN 60825:1994: A notified body has issued a Certificate of Compliance according to the Low Voltage Directive of February 19, 1973. A sample of this equipment has been tested and found to be in conformity with IEC 825:1993/EN 60825:1994.

Environmental Standard IEC 529/EN 60529-A1: 1992: A sample of this equipment has been tested according to IEC 529/EN 60529-A1: 1992 and found to provide a degree of protection equal to IP68.

xvi 744490 Rev B

Laser Safety

Introduction This product contains an infrared laser that transmits intensity-modulated light and emits invisible radiation.

Warning: Radiation

WARNING: • Avoid personal injury! Use of controls, adjustments, or procedures other than

those specified herein may result in hazardous radiation exposure. • Avoid personal injury! The laser light source on this product emits invisible

laser radiation. Avoid direct exposure to the laser light source.

• Do not apply power to this product if the fiber is unmated or unterminated. • Do not stare into an unmated fiber or at any mirror-like surface that could reflect

light that is emitted from an unterminated fiber.

• Do not view an activated fiber with optical instruments.

Warning: Fiber Chips

WARNING: Avoid personal injury! Wear safety glasses and use extreme caution when you handle the glass chips that are inside the cladding of the optical fiber. X-ray cannot detect these glass chips if they become embedded in the skin. Place the chips immediately in a small waste container and discard.

Modifications Do not make modifications to this product without the approval of Scientific-Atlanta.

Whenever modifications that may affect hazard levels are made to the optical fiber communication system, the person or organization that performs such modification must reassess hazard levels. They must do this by conducting tests and measurements wherever appropriate for the ensurance of compliance. If there is a change in the hazard level, they must relabel this product.

744490 Rev B xvii

Laser Safety, Continued

Maximum Laser Power The maximum laser power that can be produced in the transmitter of this product, due to misadjustment or component failure, is 8.8 mW.

Laser Warning Label The label below is located on the product.

T9851

CAUTIONINVISIBLE LASER RADIATION IS EMITTED

FROM THE END OF THEOPTICAL CONNECTOR

AVOID DIRECT EXPOSURE TO THE BEAMCLASS 1 LASER PRODUCT 1310nm8.8 mW max as per EN 60825-1:1994

xviii 744490 Rev B

Chapter 1 Introducing the GainMaker Node

Overview

Guide Contents This guide is divided into six chapters and one appendix, and contains the following information.

Topic See Page

Chapter 1 - Introducing the GainMaker Node 1-1

Chapter 2 - Installing and Configuring the GainMaker Node 2-1

Chapter 3 - Changing a GainMaker Amplifier to a GainMaker Node 3-1

Chapter 4 - Balancing and Setup of the GainMaker Node 4-1

Chapter 5 –Troubleshooting 5-1

Chapter 6 – Customer Information 6-1

Appendix A – Technical Information A-1

Chapter Contents This chapter introduces you to the GainMaker™ Node and contains the following topics.

Topic See Page

Description of the GainMaker Node 1-2

Types of GainMaker Node Amplifiers 1-5

Accessories 1-6

Illustrations 1-8

Block Diagram 1-10

744490 Rev B Introducing the GainMaker Node 1-1

Description of the GainMaker Node

Introduction The GainMaker Node is available in the following forward bandwidth. • 870 MHz

The GainMaker Node is available with the following amplifier types. • High Gain Dual • High Gain Balanced Triple

The GainMaker Node is available in the following reverse/forward path splits. • 40/52 MHz • 42/54 MHz • 55/70 MHz • 65/86 MHz

GainMaker Amplifier The GainMaker Node launch amplifier modules have the following characteristics. • -20 dB test points, located electrically outside of the diplex filter, provide testing of

forward output signals and reverse input signals without disrupting normal operation

• Upgradeable from the GainMaker amplifier • Room for optional status monitoring transponder in housing lid • Direct module plug into the housing provides superior amplifier heat sinking • Symmetrical housing and modules provide convenient mounting

− Reversible amplifier module due to diagonally positioned input and main output ports enabling installation of street-side housing lid access

• Improved AC circuitry provides 15 A of steady state current capability that is able to withstand 25 A of peak current (for a maximum of 2 hours)

• Surge Resistant Circuitry provides improved resistance to high voltage transients. • Coated housing protects outdoor equipment in coastal areas and other corrosive

environments

• Input and output reverse pad locations to increase flexibility in reverse path design and alignment


1-2 Introducing the GainMaker Node 744490 Rev B

Description of the GainMaker Node, Continued

Power Supply The DC power supply has the following features. • Located in housing lid for ease of maintenance • AC and DC test points provided on both the power supply and the launch

amplifier board • Selectable AC undervoltage lockout feature

− The 40 volt lockout is for 60/90 volt systems (factory default) − The 50 volt lockout position can be selected for operation in 90 volt systems

(field configurable by moving a jumper)

Input and Output Ports Input and output ports for the GainMaker Node are configured for each amplifier type as follows.

High Gain Dual

This amplifier has one optical input port, and two or three RF output ports. The number of output ports is determined by which one of the following is installed in the plug-in signal director position. • Jumper • Two-way splitter • 8 dB directional coupler • 12 dB directional coupler

Note: Either the Aux1 or Aux2 output port could be selected as the second output port with the jumper accessory installed. The splitter and 8 dB & 12 dB couplers activate both Aux1 and Aux2 ports.

High Gain Balanced Triple This amplifier has one optical input port and three RF output ports.



Description of the GainMaker Node, Continued

Configuration All GainMaker Node launch amplifiers are configured with the following. • Diplex Filters • Reverse Amplifier • Forward Interstage Equalizer (Linear) • Forward Interstage and Output Attenuator Pads • RF Interface Board

Test Points There are seven RF and four voltage test points on the GainMaker Node.

AC Shunt Power Directors The GainMaker Node launch amplifier has four AC shunt power directors located near the ports of the amplifier that are used to direct AC current to and from the amplifier input and output ports.


Types of GainMaker Node Amplifiers

GainMaker Node Ordering Matrix The matrix below lists the types of node stations, launch amplifiers, and amplifier- to- node upgrade kits. A node station consists of a configured launch amplifier with a complete housing, power supply, optical receiver and/or transmitter, and wiring harness. For ordering information, contact your customer representative.

Sample

2 8

ProductPlatform

2 = GainMakerFamily

8 = 5 - 870 MHz

ProductFamily

1 = System Amp3 = Node Upgrade

0 = No housing (Launch amp module only)1 = Coated housing without test point access (base + lid for node; lid only for upgrade kit)5 = Coated bypass housing without test points (not available yet; base + lid for node; lid only for upgrade kit)6 = Coated housing without test point access; side entry (Node only; base and lid for node only)

Module

Bandwidth

20 = High Gain Dual (Type 2)50 = High Gain Balanced Triple (Type 5)

Forward/Reverse Split

2 = 42/54 MHz split4 = 40/52 MHz split5 = 55/70 MHz split6 = 65/86 MHz split

Reverse Amplifier/SM Transponder

Node Options:10 = Standard Reverse Amp without reverse switch or transponder11 = Standard Reverse Amp without reverse switch, with SA transponder21 = Standard Reverse Amp with reverse switch and SA transponder30 = High NPR Reverse Amp without reverse switch (not available)31 = High NPR Reverse Amp without reverse switch, with SA transponder (not available)Upgrade Kit Options:00 = Do not add transponder or reverse switch (Upgrade Kit only)01 = Add Scientific-Atlanta transponder only (Upgrade Kit only)

Accessories

0 = No Change (Upgrade Kit only)1 = Standard configuration with standard cover2 = Reserved3 = Standard configuration with standard cover with crowbar

01 = No Change to I/S (Upgrade Kit only)21 = Thermal configured in I/S31 = AGC configured in I/S - pilot @ 547.2532 = AGC configured in I/S - pilot @ 445.2533 = AGC configured in I/S - pilot @ 499.2534 = AGC configured in I/S - pilot @ 471.2535 = AGC configured in I/S - pilot @ 527.2536 = AGC configured in I/S - pilot @ 456.0037 = AGC configured in I/S - pilot @ 451.2538 = AGC configured in I/S - pilot @ 495.2539 = AGC configured in I/S - pilot @ 427.25

Interstage Control

0 = No power supply (Launch amp mod only)1 = Standard power supply2 = In-rush current limiting power supply (for bypass housing/not available)

T9722

Power Supply Configuration

Housing Configuration

0 = No connector (Launch amp module only)1 = SC/APC2 = SC/UPC3 = FC/APC

Connector Options

0 = No transmitter (Launch amp module or forward only node)1 = FP2 = DFB

Transmitter Options

0 = No receiver (Launch amp module only)1 = 1 Standard gain reciever2 = 2 Standard gain receivers

Receiver Options


Accessories

Introduction The GainMaker Node is equipped to work with the following customer installable and miscellaneous accessories.

Customer Installable Accessories for All Amplifiers The following table lists the customer installable accessories and their part numbers.

Note: All GainMaker Node accessories are unique to the GainMaker Broadband Amplifier Platform product line.

Accessory Part Number

Attenuator pads 589693 through 589734 0 dB through 20.5 dB in 0.5 dB Increments

75 ohm terminator 589735 In Attenuator Pad Package

Forward Equalizer

Jumper 589260

870 MHz 589261 through 589278 1.5 dB through 27 dB in 1.5 dB Increments

Inverse Equalizer 750 MHz/870 MHz

589325 through 589334 1.5 dB through 15 dB in 1.5 dB Increments

Reverse Equalizer

Jumper 712719

40 MHz 42 MHz

589628 through 589639 1 dB through 12 dB in 1 dB Increments

55 MHz 712679 - 712690 1 dB through 12 dB in 1 dB Increments

65 MHz 589736 through 589747 1 dB through 12 dB in 1 dB Increments



Accessories, Continued


3-State Reverse Switch 589347

Trim Network 714446

System Trim Jumper 589285 (shipped with each node)

Customer Installable Accessories for the High Gain Dual The following table lists additional customer installable accessories that are available for the High Gain Dual. These accessories plug into the signal director position.


Jumper 589281

Splitter 589357

DC-8 directional coupler 589363

DC-12 directional coupler 589367

Miscellaneous Accessories The following table contains the miscellaneous accessories used with all GainMaker Nodes, and their part numbers.


Surge protector 715973

Status monitoring transponder 744239

GainMaker amplifier upgrade kit See ordering matrix


Illustrations

Launch Amplifier Test Points The following diagram shows the test points of the High Gain Dual amplifier module.

Notes: • The test point locations are the same for all GainMaker Node launch amplifiers. • Test points shown are -20 dB, except for AC and DC test points.

1.5

6

4.53.5

6.5

6

1.5

1.51.25

REVEQ0

FWDINPUT

AUX2

AUX1

MAIN

REV

REV IN-20dB

REV AUX2IN PAD

REV AUX2IN PAD

REV AMPIN -2dB

REV EQ

REVOUTPAD

FWD INPAD

750 MHz870 MHz

FWD INEQ

ACTEST

DCTEST

TYPE 2HIGH GAIN DUAL

FWD OUT& REV INJ

-20dB

FWD

REV

FWD

FWD

HPF/EQ BODE

SWITCH

I/SPAD

MANUALBACKOFF

AGC PAD

S1

2 31

FWDAUX1OUTPAD

FWDMAINOUTPAD

SYSTRIM

AGCGAIN

FWD OUT& REV INJ

-20dB

REV IN-20dB

FWD OUT& REV INJ

-20dB

REV IN-20dB

I/S EQ

AUXSIGNAL DIR

AUX1

AUX2THERMALAGC

40 / 5242 / 5455 / 7065 / 86

REV AUX1IN PAD

REV MAININ PAD

IF AGC INSTALLED

S1 SWITCH FUNCTIONS

SET UP MODE AGCON3

THERM1

MAN2

THERMAL COMP MODEIF NO AGC

AMP +COAX

3

AMPONLY

1

OFF

2

REVFWD INFROMRCVR

REV OUTTO XMTR

0

6.5

T9744

Main Reverse InjectionTest Point

Aux2 Reverse InjectionTest Point


High Gain Dual Accessories The following diagram shows the accessory locations of the High Gain Dual launch amplifier module.

1.5

6

4.53.5

6.5

6

1.5

1.51.25

REVEQ0

FWDINPUT

AUX2

AUX1

MAIN

REV

REV IN-20dB

REV AUX2IN PAD

REV AUX2IN PAD

REV AMPIN -2dB

REV EQ

REVOUTPAD

FWD INPAD

750 MHz870 MHz

FWD INEQ

ACTEST

DCTEST


FWD OUT& REV INJ

-20dB

FWD

REV

FWD

FWD

HPF/EQ BODE

SWITCH

I/SPAD

MANUALBACKOFF

AGC PAD

S1

2 31

FWDAUX1OUTPAD

FWDMAINOUTPAD

SYSTRIM

AGCGAIN

FWD OUT& REV INJ

-20dB

REV IN-20dB

FWD OUT& REV INJ

-20dB

REV IN-20dB

I/S EQ

AUXSIGNAL DIR

AUX1

AUX2THERMALAGC

40 / 5242 / 5455 / 7065 / 86

REV AUX1IN PAD

REV MAININ PAD

IF AGC INSTALLED

S1 SWITCH FUNCTIONS

SET UP MODE AGCON3

THERM1

MAN2


AMP +COAX

3

AMPONLY

1

OFF

2

REVFWD INFROMRCVR

REV OUTTO XMTR

0

6.5

Reverse EQReverse Output Pad

Reverse Aux2 Input Pad

Aux1 Reverse Input Pad

Reverse Main Input Pad T9743



Illustrations, Continued

High Gain Balanced Triple Accessories The following diagram shows the accessory locations of the High Gain Balanced Triple launch amplifier module.

6.5

3 REV AUX1IN PAD

6

FWD AUX2OUT PAD

6

REV AUX2IN PAD

ACTEST

6

6.5

4.53.5

6.5

6

INPUT

AUX2

AUX1

MAIN

REV

REV IN-20dB

REV AMPIN -2dB

REV EQ

REVOUTPAD

FWD INPAD

FWD IN EQ

DCTEST

BALANCED TRIPLE

FWD OUT& REV INJ

-20dB

FWD

REV

FWD

FWD

HPF/EQ BODE

6

I/SPAD

MANUALBACKOFF

AGC PAD

S1

2 31

FWDAUX1OUTPAD

FWDMAINOUTPAD

SYSTRIM

AGCGAIN

FWD OUT& REV INJ

-20dB

REV IN-20dB

FWD OUT& REV INJ

-20dB

REV IN-20dB

I/S EQ

REV AUX1IN PAD

REV MAININ PAD

IF AGC INSTALLED

S1 SWITCH FUNCTIONS

SET UP MODETHERM

1MAN

2


AMP +COAX

3

AMPONLY

1

OFF

2

REV

750 MHz870 MHz

THERMALAGC

40 / 5242 / 5455 / 7065 / 86

3

AGC ON

SWITCH

T9856

ReverseOutput

Pad

ForwardInput EQ

ReverseAux 1

Input Pad

AGCGain

Adjust

ReverseEQ

Interstage EQ

Interstage Pad

Manual BackoffPotentiometer

ForwardInput Pad

AGC PadReverse

MainInput Pad

ForwardMain

Output Pad

ForwardAux 1

Output Pad

ReverseAux 2

Input Pad

SystemTrim

Switch 1(Multifunction

Switch)

ForwardAux 2

Output Pad


Block Diagrams

High Gain Balanced Triple Launch Amplifier Module The following illustration is a block diagram of the High Gain Balanced Triple launch amplifier module.

T9721

FuseShunt

Fwd

Rev

RevEQ

HPFTrim/EQ

SysTrim

Bode

Redundant ReceiverRCVR

LPF

ISEQ

AGC

Forward Inputfrom Receiver

Reverse Output

RF InterfaceBoard

FuseShunt

AC

Byp

ass

Aux 2Reverse Input

-20 dB T.P.

Aux 2 Forward Outputand Reverse Injection

-20 dB T.P.

Aux 1 Forward Output andReverse Injection

-20 dB T.P.

Aux 1Reverse

Input-20 dB T.P.

Reverse Amp Input-20 dB T.P.

EQ Pad Pad

Pad

AC

Byp

ass

3 StateSwitch

X3Option

AuxPad

RevPad

MainPad

RevPad

RevPad

AuxPad

Fwd

Rev

FuseShunt

MainAux 2

Aux 1

MainReverse Input

-20 dB T.P.

-20 dB

Main Forward Outputand Reverse Injection

-20 dB T.P.

AC

Byp

ass

Fwd

Rev

Fwd

Rev

AGCPad

Status Monitoring

PadPhoto Diode

ToStatMonInput

To Stat Mon Output

Sta

tus

Mo

nit

or

Tra

nsp

on

der

Power Supply

Fiber Management Tray

ForwardRedundancy

Module

High Gain Balanced Triple Launch Amplifier

Primary ReceiverRCVR-20 dB

PadPhoto Diode

XMTR

Reverse Fiber

Forward Fiber

-20 dB

PadLaser Diode



Block Diagrams, Continued

High Gain Dual Launch Amplifier Module The following illustration is a block diagram of the High Gain Dual launch amplifier module.

T9720

FuseShunt

Fwd

Rev

RevEQ

HPFTrim/EQ

SysTrim

Bode

Redundant ReceiverRCVR

LPF

ISEQ

AGC

Forward Inputfrom Receiver

Reverse Output

RF InterfaceBoard

FuseShunt

AC

Byp

ass

Aux 2Reverse Input

-20 dB T.P.

Aux 2 Forward Outputand Reverse Injection

-20 dB T.P.

Aux 1 Forward Output andReverse Injection

-20 dB T.P.

Aux 1Reverse

Input-20 dB T.P.

Reverse Amp Input-20 dB T.P.

EQ Pad Pad

Pad

AC

Byp

ass

3 StateSwitch

X3Option

AuxPad

RevPad

MainPad

RevPad

RevPad

Fwd

Rev

FuseShunt

MainAux 2

Aux 1

MainReverse Input

-20 dB T.P.

-20 dB

Main Forward Outputand Reverse Injection

-20 dB T.P.

AC

Byp

ass

Fwd

Rev

Fwd

Rev

AGCPad

Status Monitoring

PadPhoto Diode

ToStatMonInput

To Stat Mon Output

Sta

tus

Mo

nit

or

Tra

nsp

on

der

Power Supply

Fiber Management Tray

ForwardRedundancy

Module

High Gain Dual Launch Amplifier

Primary ReceiverRCVR-20 dB

PadPhoto Diode

XMTR

Reverse Fiber

Forward Fiber

-20 dB

PadLaser Diode

SignalDir.


744491 Rev B Installing and Configuring the GainMaker Node 2-1

Chapter 2 Installing and Configuring the GainMaker Node

Overview

Introduction This chapter provides instructions for installing and configuring the node.

Preparing for Installation Before you start the installation procedure, make sure you have all the tools and accessories ready. You also need to know the torquing specifications for the node.

Tools The following tools are needed to configure and install the GainMaker Node: • Torque wrench with a 1/2-in. socket • Hex driver or ratchet • Flat-blade screwdriver • Phillips-head screwdriver

Accessories The following accessories may be necessary to configure and install the GainMaker Node: • Heat shrink tubing (optional) • Heavy-duty wire cutters or snips for cutting the cable • A propane torch or electric heat gun applicator for heat shrink (if shrink tubing is

used) • A selection of attenuators (pads) with values ranging from 0 dBm to 20.5 dBm • A selection of forward and reverse equalizers


2-2 Installing and Configuring the GainMaker Node 744491 Rev B

Overview, Continued

Torque Specifications The following table gives the torque specifications for the GainMaker Node.

Item Imperial Metric

Housing closure bolts (6 each)

Initial: 25 in-lb Final: 75 in-lb to 100 in-lb

Initial: 2.8 Nm Final: 8.5 Nm to 11.3 Nm

Strand clamp bolts 5 ft-lb to 8 ft-lb 6.8 Nm to 10.8 Nm

Pedestal mounting bolts 8 ft-lb to 10 ft-lb 10.8 Nm to 13.6 Nm

Fiber optic cable 35 ft-lb to 40 ft-lb 47.5 Nm to 54.2 Nm

Seizure screw 2 ft-lb to 5 ft-lb 2.7 Nm to 6.8 Nm

75-Ohm terminator 2 ft-lb to 4 ft-lb 2.7 Nm to 5.4 Nm

Housing plug 2 ft-lb to 4 ft-lb 2.7 Nm to 5.4 Nm

Housing hinge locking screw

5 in-lb to 8 in-lb 0.57 Nm to 0.90 Nm

Amplifier cover screws 10 in-lb to 12 in-lb 1.3 Nm to 1.4 Nm

Launch amplifier module retainer screws

6 in-lb to 9-in-lb 0.7 Nm to 1.0 Nm

Transponder module retainer screws

6.2 in-lb 0.7 Nm

Weight Specifications Before strand (aerial) mounting or pedestal mounting the GainMaker Node, it is essential to be aware of its weight. The GainMaker Node weighs approximately 39 lbs. (17.7 kg.).


Opening and Closing the GainMaker Node Housing

Opening the Housing Follow these steps to open the GainMaker Node housing.

Important: Before unscrewing the housing bolts, make sure the removable locking screw in the hinge is in place and secure. The locking screw prevents separation of the lid from the base. Note: The closure bolts will remain attached to the housing.

1. Unscrew the six ½-in. closure bolts until they are loose.

2. Open the housing.

Note: The closure bolts will remain attached to the housing.

Closing the Housing Follow these steps to close the GainMaker Node housing.

1. Make sure the housing gaskets are clean and in the correct position.

2. Close the housing.

CAUTION:

Ensure all the cables are out of the way when closing the housing.

3. Lightly secure the six ½-in. closure bolts with a hex driver or ratchet.

4. Using a torque wrench, tighten the six closure bolts to 25 in-lb (2.8 Nm). Important: Refer to Torquing Sequence for proper torquing sequence. 5. Using the same pattern, tighten the closure bolts from 75 in-lb to 100 in-lb (8.5 Nm to 11.3 Nm).



Opening and Closing the GainMaker Node Housing, Continued

Torque Sequence The following diagram shows the proper torque sequence for closing the housing.


Installing the GainMaker Node

Overview This section provides requirements and procedures for installing the node.

Illustration The following illustration shows the dimensions, in inches and millimeters, of the GainMaker Node housing with a standard lid. Use these measurements to calculate clearance requirements for your installation.

T9649

3.00 in.76.2 mm

7.30 in.185.42 mm

7.82 in.198.63 mm

Strand Center Line(0.25 in. In Dia.)

14.54 in.369.32 mm

7.50 in.190.5 mm

17.25 in.438.15 mm



Installing the GainMaker Node, Continued

Housing Base The GainMaker Node is compatible with the GainMaker Amplifier housing base, System Amplifier III housing bases, and System Amplifier II or II+ housing bases.

Important: The GainMaker Node launch amplifier modules are marked with a blue label to indicate 15 ampere capability. The RF connectors in these modules are also blue. The GainMaker launch amplifier module must be used in conjunction with a 15 ampere capable housing base which is marked with a blue label.

Note: 15 ampere capable System Amplifier III housings with the blue label and System Amplifier II or II+ housings that have been upgraded to 15 ampere capability with an available seizure upgrade kit are compatible with GainMaker Node launch amplifier modules.


Connecting the Fiber Optic Cable to the Node

Warning: Radiation

WARNING:

• Avoid personal injury! The laser light source on this product emits invisible laser radiation. Avoid direct exposure to the laser light source.

• Avoid personal injury! The laser light source on this product emits invisible laser radiation. Avoid direct exposure to the laser light source.

• Do not apply power to this product if the fiber is unmated or unterminated. • Do not stare into an unmated fiber or at any mirror-like surface that could reflect

light that is emitted from an unterminated fiber. • Do not view an activated fiber with optical instruments.

Handling Fiber Cable With repeated use, optical connectors can become dirty or scratched. This can seriously degrade system performance. It is critical that connectors be maintained in good condition. Do not disconnect or connect any connectors unless absolutely necessary. Always clean both halves of each connector with an alcohol solution (99% recommended) and lint-free wipes when preparing to join the two halves. Use compressed air to clean the adapter.

Note: We offers a ferrule cleaner, part number 468517, for SC and FC style connectors.

Fiber Connectors and Fiber Optic Service Cable Pictured below are the fiber connectors available with the GainMaker Node using fiber optic service cables.

Note: To order additional service cables, refer to the following chart.



Connecting the Fiber Optic Cable to the Node, Continued

Model Part Number

4-Channel Service Cable, 60-ft cable, SC/APC 739776






4-Channel Service Cable, 60-ft cable, SC/UPC 739782

4-Channel Service Cable, 100-ft cable, SC/UPC 739783

4-Channel Service Cable, 60-ft cable, FC/APC Narrow Key 739784

4-Channel Service Cable, 100-ft cable, FC/APC Narrow Key 739785

Attaching the Connector to the GainMaker Node Housing Complete the following steps to attach the connector to the housing.

1. Unscrew the rotational nut from the main nut.

2. Slide the main nut forward to disengage the fiber protective sleeve.



Connecting the Fiber Optic Cable to the Node, Continued

3. Feed the jacketed fibers one at a time through the fiber entry port.

T9747

Fiber Entry Port

4. Screw the main nut into the fiber entry port and torque from 20 ft-lb to 25 ft-lb (27.1 Nm to 33.9 Nm).

5. Push the fiber sleeve back into the main nut.

6. Screw the rotational nut back onto the main nut and torque from 20 ft-lb to 25 ft-lb (27.1 to 33.9 Nm).

7. Secure the setscrews on the main nut per recommended instructions supplied with the fiber optic service cable.

8. Use heat shrink to seal as required.

9. Proceed to Attaching the Fiber Connectors.


Attaching the Fiber Connectors

Overview Before you attach the fiber connectors, make sure the GainMaker Node housing is open. The following procedures provide instructions to unstow the fiber management tray, prepare the connectors for installation, install the fiber connectors and stow the fiber management tray.

For best results, follow this installation procedure exactly.

WARNING:

Protect yourself from electric shock and your system from damage! Take precautions when working with this equipment. Certain components can deliver an electrical shock or cause burns. Disconnect power before attempting this procedure.

Unstowing the Fiber Management Tray Follow these steps to unstow the fiber management tray.

Important: Be careful not to damage the fibers.

1. Open the housing. Refer to Opening the Housing.

2. Using your index finger, pull up on the fiber tray’s pull-tab lever and rotate the tray to its stowed position.

Preparing the Fiber Connectors for Installation Follow these steps to prepare the fiber connectors for installation.

1. Pull the fiber pigtails the rest of the way through the port into the housing. Note: Be careful not to damage the connected fibers.



Attaching the Fiber Connectors, Continued

2. Route the fiber pigtails behind the fiber tray release clip and the four hold-down clips on the back of the housing as shown in the illustration.

T9846

3. Stow the fiber management tray. Refer to Stowing the Fiber Management Tray.

Installing the Fiber Connectors Follow these steps to install the fiber connectors.

1. Route your fiber pigtails through the slot in the top center of the fiber management tray.

Notes:

• Route the fiber pigtails clockwise as close to the edge and through the opening of the fiber management tray.

• Be careful not to use a tight fiber radius. The radius should be a minimum of 1.5 in. (3.8 cm).

2. Adjust the fiber position. The pigtails must be adjacent to the connectors.

3. Clean the tips of the fiber connectors with 99% isopropyl alcohol and lint free optical swabs.



Attaching the Fiber Connectors, Continued

4. Attach the fiber connectors. See the following illustration.

Stowing the Fiber Management Tray

1. Using your index finger, push down on the fiber management tray’s pull-tab lever until it clicks into position. Rotate the tray to its stowed position.

2. Close the housing. Refer to Closing the Housing.


Attaching the Coaxial Connectors

Trimming the Center Conductor The GainMaker Node requires pin-type connectors for all RF connections.

Standard pin connectors, with pins extending 1.5 in. to 1.6 in. (3.8 cm to 4.1 cm) from the connector shoulder, require no trimming. You must trim longer pins before inserting them into the housing.

To trim long pins, follow the steps in the table below.

1. Place the connector above the entry port so that it lines up with its installed position.

2. If the center conductor pin extends past the STRIP line on the housing, trim the pin flush to the STRIP line. See the section entitled Center Conductor Trim Length.

Center Conductor Trim Length The following diagram shows a visual guide of the center conductor trim length.



Attaching the Coaxial Connectors, Continued

Connecting the Coaxial Cable Pin Connector to the GainMaker Node Housing Follow these steps to connect the coaxial cable to the GainMaker Node housing.

1. Begin this procedure with the node housing open. Refer to Opening the Housing.

2. If the center conductor pin extends more than the length specified in Trimming the Center Conductor, trim the pin with heavy-duty wire cutters.

3. Insert the appropriate coaxial connector into the housing at the desired housing port. Tighten the connector nut according to the manufacturer’s specifications.

4. Tighten the seizure screw from 2 ft-lb to 5 ft-lb (2.7 Nm to 6.8 Nm).

5. Repeat steps 2 through 4 for each RF port used.

6. If RF is present at an unused port, insert a 75 Ohm housing terminator into the port and tighten from 2 ft-lb to 4 ft-lb (2.7 Nm to 5.4 Nm).

If RF is not present at an unused port, insert a housing plug into the port and tighten from 2 ft-lb to 4 ft-lb (2.7 Nm to 5.4 Nm).

6. Proceed to Attaching the Housing.


Mounting the GainMaker Node

Overview The following procedures detail how to install the GainMaker Node on a strand (aerial) installation or in a pedestal.

Strand (Aerial) Installation Follow these steps to install the housing on a strand (aerial). The housing does not need to be opened for strand installation.

CAUTION:

Be aware of the size and weight of the GainMaker Node while strand mounting. Ensure that the strand can safely support the node’s maximum weight.

1. Loosen the strand clamp bolts.

2. Lift the housing into proper position on the strand.

3. Slip the strand clamps over the strand and finger-tighten the clamp bolts. This allows additional movement of the housing as needed.

4. Move the housing as needed to install the coaxial cable and connectors. See the diagram below for an example.

Signal Flow from Left to Right



Mounting the GainMaker Node, Continued

Signal Flow from Right to Left

Notes:

• Power In may be switched with the Coax Out if you reverse the amplifier module and feed the signal from right to left.

• If supplying power to the node through the main input port, a power inserter must be installed to terminate the RF signal.

5. Tighten the strand clamp bolts (using a ½-inch torque wrench) from 5 ft-lb to 8 ft-lb (6.8 Nm to 10.8 Nm). Make sure there is good mechanical contact between the strand and the housing.

Note: A slight tilt of the face of the housing is normal. Cable tension will cause the housing to hang more closely to vertical.

6. Connect the coaxial cable to the pin connector according to connector manufacturer’s specifications.

7. Proceed to Configuring the GainMaker Node Amplifier Module.



Mounting the GainMaker Node, Continued

Pedestal Installation Follow these steps to install the GainMaker Node in a pedestal.

1. Remove the cover of the pedestal.

2. Remove the self-tapping bolts from the strand clamps and set the bolts and strand clamps aside.

3. Position the housing in the pedestal frame as shown below. Line up the self-tapping bolt holes on the bottom of the housing with the mounting holes on the bracket.

Note: The housing mounts to the bracket provided by the pedestal manufacturer.

4. Secure the housing to the bracket by using the bolts that you removed in step 2. Use the strand clamps as spacers if necessary. Torque the bolts from 8 ft-lb to 10 ft-lb (10.8 Nm to 13.6 Nm).

5. Connect the coaxial cable to the pin connector according to connector manufacturer’s specifications.

6. Proceed to Configuring the GainMaker Node Amplifier Module.


Installing Accessories

Overview This section provides requirements and instructions for configuring the GainMaker amplifiers.

Note: Install all desired accessories into the amplifier module before installing the amplifier module into the housing.

Installing the Attenuator Pads To install the attenuator pads in the amplifier, follow the steps below.

Note: For best results, follow this installation procedure exactly.

1. Begin this procedure with the housing open. Refer to Opening the Housing. Note: These accessories can be installed without removing the amplifier cover.

2. Install the pad(s) specified by the design print in the appropriate pad slot(s). For a list of available GainMaker Node accessory pad values and part numbers, see Appendix A.

Notes:

• Be sure all the pins on the attenuator pad bottom align with the pinholes in the attenuator pad slot, allowing the attenuator pad to install flat against the amplifier module.

• The High Gain Dual launch amplifier is shown here. Locations for attenuator pads are approximately the same for all GainMaker system amplifiers.

• The forward aux output pads, forward interstage pad, and forward main output pad are installed at the factory to set the operational gain of the station.

Important: These pads should not be changed in the field, unless specified by system design.

• The AGC pad is required for AGC equipped stations only.



Installing Accessories, Continued

3. Install other options or accessories as desired, or proceed to Configuring the GainMaker Node with Major Modules.

Installing the Equalizers To install the equalizers in the amplifier, follow the steps below.

Note: For best results, follow this installation procedure exactly.

1. Begin this procedure with the housing open. Refer to Opening the Housing.

Note: These accessories can be installed without removing the amplifier cover.

2. Install the forward input equalizer specified by the design print in the forward input equalizer slot. Or, install the correct inverse equalizer specified by the design print for your system in the forward input equalizer slot. For a list of available GainMaker Node accessory pad values and part numbers, see Appendix A.

Notes:

• Be sure all the pins on the forward input equalizer or inverse equalizer bottom align with the pin holes in the equalizer slot, allowing the equalizer to install flat against the amplifier module.

• The same inverse equalizer is used for either 750 MHz or 870 MHz.

• The High Gain Dual system amplifier is shown here. Locations for EQs are the same for all GainMaker system amplifiers.




• The plug-in interstage equalizer and an on-board interstage equalizer combine to produce the total internal tilt for the station. The plug-in interstage equalizer value is different from one type of amplifier to another by design, in order to achieve optimum performance.

Important: The forward interstage equalizer is installed at the factory and should not be changed in the field. While it is an 870 MHz equalizer, it is appropriate for use in both 870 MHz and 750 MHz system applications.

2. Install the reverse equalizer specified by the design print in the reverse equalizer

slot. For a list of available GainMaker Node accessory pad values and part numbers, see Appendix A.


Installing the Crowbar Surge Protector To install the crowbar surge protector in the amplifier, follow the steps below.





2. Using either a Phillips-head or T-15 Torx bit screwdriver, remove the amplifier cover by loosening the amplifier cover screws.

3. Install the crowbar surge protector in the surge protector slot. Refer to the illustration below.

Notes:

• Be sure all the pins on the crowbar surge protector bottom align with the pin holes in the surge protector slot, allowing the surge protector to install flat against the amplifier module.

• Make sure the components face the outside of the station (see the diagram above for proper positioning). Heat shrink tubing has been added to prevent shorting.

4. Secure the cover to the amplifier module and tighten the amplifier cover screws from 10 in-lb to 12 in-lb (1.3 Nm to 1.4 Nm).

Important: The cover should lie completely flat on the amplifier chassis. Make sure none of the amplifier accessories prevent the cover from lying flat.





Installing the Plug-in Signal Director To install the signal director in the amplifier, follow the steps below.

1. Open the housing. Refer to Opening the Housing. Note: This accessory can be installed without removing the amplifier cover.

2. Be sure to install the correct signal director for your system as specified by the design print.

If you are installing a ... This will ...

Jumper, part number 4008208 activate only one auxiliary port.

Splitter, part number 4008364 activate both auxiliary ports with equal signal levels.

8 dB Coupler, part number 4008365 or 12 dB Coupler, part number 4008366

activate both auxiliary ports with differing signal levels.

3. Install the signal director in the signal director slot. Refer to the following diagram for the location of the signal director slot.




Important: Be sure the signal director is oriented in the proper direction for your system. Rotating the signal director in the slot will change which ports are activated with which signal. Refer to the following table to determine the orientation appropriate for your system installation.

Note: Be sure all the pins on the signal director bottom align with the pin holes in the signal director slot, allowing the signal director to install flat against the amplifier module.

Orientation Table Jumper

To activate the ... Orient the Jumper ...

AUX 1 port so that the word "Thru" on the jumper label is next to the word "AUX 1" on the amplifier module cover.

AUX 2 port so that the word "Thru" on the jumper label is next to the word "AUX 2" on the amplifier module cover.

Splitter

To activate the ... Orient the Splitter ...

AUX 1 port and AUX 2 port

so that the word "AUX 1" on the jumper label is next to the word "AUX 1" on the amplifier module cover, and so that the word "AUX 2" on the jumper label is next to the word "AUX 2" on the amplifier module cover.

Important: Do not reverse the Splitter in the signal director slot as this could degrade the amplifier signal.




8 dB Coupler

To activate the ... Orient the Coupler ...

AUX 1 port with an 8 dB "tap leg" signal and AUX 2 port with a "thru leg" signal

so that the "8" on the jumper label is next to the word "AUX 1" on the amplifier module cover, and so that the word "Thru" on the jumper label is next to the word "AUX 2" on the amplifier module cover.

AUX 2 port with an 8 dB "tap leg" signal and AUX 1 port with a "thru leg" signal


12 dB Coupler

To activate the ... Orient the Coupler ...

AUX 1 port with a 12 dB "tap leg" signal and AUX 2 port with a "thru leg" signal


AUX 2 port with a 12 dB "tap leg" signal and AUX 1 port with a "thru leg" signal


4. Install other options or accessories as desired or proceed to Configuring the GainMaker Node with Major Modules.


Configuring the GainMaker Node with Major Modules

Overview This section provides instructions for installing and removing the major modules in the GainMaker Node.

Launch Amplifier Introduction The launch amplifier module plugs into the strand-mounted or pedestal-mounted (bottom) half of the housing via RF connectors on the bottom side of the module.

Amplifier housings and amplifier modules are designed so you can orient the amplifier module conveniently for maintenance. The amplifier module is reversible since the input and main output ports are located diagonally across from each other. Therefore, you may orient all of the amplifier housings to open either to the road side or to the field side. The amplifier is then installed in the appropriate position, either right side up or upside down.

Installation Procedure Follow these steps to install the amplifier module.

1. Perform the following if you are working with an amplifier station where AC is present.

• Install the AC shunt power directors in the amplifier after you install the amplifier module in the housing.

• Remove the AC shunt power directors from the amplifier before you remove the amplifier module from the housing.

CAUTION:

Failure to follow these instructions may cause damage to module RF connectors and housing seizure assemblies.

2. Orient the amplifier module so the Input and Main Out ports (the locations of which are stamped on the module cover) are in the proper corners for your installation.

3. Line up the RF connectors on the amplifier module and the housing, and then push the amplifier module into the housing.



Configuring the GainMaker Node with Major Modules, Continued

4. Secure the launch amplifier module to the housing by tightening the four module retainer screws with a screwdriver from 6 in-lb to 9 in-lb (0.7 Nm to 1.0 Nm). See the following illustration for the retainer screw locations.

5. Snap the power cable harness into the holes in the amplifier module cover. See the following illustration for power cable harness snap location.

6. Route the excess power cable between the end of the molded power harness and the 10-pin keyed connector into the white plastic retainer clips on the module cover.

7. Attach the 10-pin keyed connector of the power cable and harness to the amplifier module.

• The 10-pin keyed connector can be connected one way only. Be sure the connector installs securely to the amplifier module.

• Be sure that the power harness locking tabs are fully seated under the amplifier cover.

8. Proceed to Removing and Inserting AC Shunt Power Directors.



Configuring the GainMaker Node with Major Modules, Continued

Procedure for Installing and Removing AC Shunt Power Directors The amplifiers draw AC power from the coaxial cable. This AC power comes from an external AC power supply.

Power can come from the input or output ports, and each launch amplifier can pass or block AC power flow on any port without affecting RF continuity. However, at least one port must pass AC power to bring power into the launch amplifier.

Set the power direction by installing AC shunt power directors for the ports through which you wish to pass AC.

Note: A red AC shunt power director is included with the unit. The red shunt is used to activate the port that supplies power. The red shunt should be removed before installing or removing the launch amplifier module from the housing.

CAUTION:

RF connectors and housing seizure assemblies can be damaged if AC shunt power directors are not removed from the amplifier before installing or removing the amplifier module from the housing.

Follow these steps to remove and insert AC shunt power directors.


2. To remove a power director, pull it straight out from the amplifier module.

3. To insert a power director, refer to the systems design print to determine AC power routing and install the AC shunt power directors in the required locations.

Note: If supplying power to the node through the main input port, a power inserter must be installed to terminate the RF signal.

4. Close the Housing. Refer to Closing the Housing.


Removing and Reinstalling the Optical Modules

Overview The following optical components can be removed and re-installed from the optical section in the GainMaker Node. The GainMaker Node may contain one optical transmitter and up to two optical receivers.

Removing/Reinstalling the Optical Transmitter Follow these steps to remove/reinstall an optical transmitter from the optical section.

WARNING:

Laser transmitters when disconnected from their optical fiber path, emit invisible laser radiation, which is harmful to the human eye. If viewed at close range, the radiation may be of sufficient power to cause instantaneous damage to the retina of the eye. Only trained service personnel using proper safety precautions and equipment, such as protective eyewear, should disconnect and service the laser transmitter equipment.


2. Remove the AC shunt power directors.

3. Rotate the fiber management tray out of its stored position. Refer to Unstowing the Fiber Management Tray.

Note: Using your index finger, pull up on the fiber tray’s pull-tab lever and rotate the fiber management tray to partially expose the optical modules below.



Removing and Reinstalling the Optical Modules, Continued

4. Disconnect the fiber connector from the fiber bulkhead in the fiber management tray.

5. Route the fiber pigtail through the fiber access slot.

6. Using a flat-blade screwdriver, loosen the two mounting screws to remove the optical transmitter.

7. Pull the transmitter out from the optical section.

Notes:

• If you are not re-installing the transmitter at this time, proceed to step 11.

• If you are re-installing the transmitter now, proceed to step 8.

8. Insert the transmitter in the appropriate slot and ensure that the transmitter is seated properly.

Note: Insertion slot is labeled on the optical interface board.

9. Use a flat-blade screwdriver to tighten the two mounting screws.


Note: Route excess fiber loosely through the fiber hold-down clip.




CAUTION:

Be careful not to damage the fiber or pigtails.

11. Reconnect the fiber connector to the fiber bulkhead adapter.

12. Rotate the fiber management tray to its stored position. Refer to Stowing the Fiber Management Tray.

13. Insert the AC shunt power directors.


14. Locate the proper fiber connector and connect to the fiber bulkhead adapter.


Removing/Reinstalling the Optical Receiver Follow these steps to remove/reinstall either the primary or redundant optical receiver from the optical section.

Important: Observe the precautions for handling an optical receiver.


2. Remove the AC shunt power directors.

3. Rotate the fiber management tray out of its stored position. Refer to Unstowing the Fiber Management Tray.

Note: Using your index finger, pull up on the fiber tray’s pull-tab lever and rotate the fiber management tray to partially expose the optical modules below.

4. Loosen the fiber connector in the fiber management tray.

5. Using a flat-blade screwdriver, loosen the two mounting screws.




6. Pull the receiver out from the optical section.

Notes:

• If you are not reinstalling the receiver at this time, proceed to step 11.

• If you are reinstalling the receiver now, proceed to step 7.

7. Insert the receiver in the appropriate slot and ensure that the receiver is seated properly.

Note: Insertion slot is labeled on the optical interface board.

8. Use a flat-blade screwdriver to tighten the two mounting screws.


Note: Route excess fiber loosely through the fiber hold-down clips.




CAUTION:

Be careful not to damage the fiber or pigtails.

11. Locate the proper fiber connector and connect to the fiber bulkhead adapter.

12. Rotate the fiber management tray to its stored position. Refer to Stowing the Fiber Management Tray.

13. Insert the AC power shunt directors.



Important Information Regarding Optical Power Levels For nodes with both primary and redundant receivers installed, if the optical power level of the primary receiver falls below -6 dBm, the forward redundancy module (FRM) will switch to the redundant (backup) receiver. The backup receiver will remain as the operating receiver until the primary receiver achieves an optical power level of -6 dBm. However, the FRM will not switch to the redundant receiver if the optical power level of the redundant receiver is below -10 dBm.

Installing the Status Monitor Transponder Module Follow these steps to install the status monitor module.





2. Align the transponder module connectors with the connectors on the interface board. Use the tabs on the bottom of the transponder as a guide to position the transponder correctly onto the interface board.

3. Secure the status monitor transponder by pushing down on the module until it clicks into place.

4. Tighten the two module retaining screws on the transponder to 6.2 in-lb (0.7 Nm).

Result:

• If the GainMaker Node is active, the green “Heart Beat” LED flickers to indicate that the unit is operating.

• If data packages are detected (e.g., to another transponder) the “Receive” LED flickers.





Removing the Status Monitor Transponder Module 1. Open the housing. Refer to Opening the Housing.

2. Using a screwdriver, loosen the two module retaining screws on the transponder.

3. With a firm grip, pull up on the transponder and remove from the interface board.


Chapter 3 Changing A GainMaker Amplifier to a GainMaker Node

Overviewdfsdfasf

Introduction An existing GainMaker System Amplifier can be upgraded to a GainMaker Node by installing a GainMaker Node upgrade kit. Refer to the GainMaker Ordering Matrix for part numbers.

Chapter Contents This chapter contains the following topic.

Topic See Page

Installing the Upgrade Kit 3-2

Tools Required Before you start, make sure you have the following tools. • Torque wrench with 1/2 –inch socket • Screwdriver appropriate for the type of screws on the amplifier module cover

– T-15 Torx bit screwdriver – Phillips-head screwdriver

744490 Rev B Changing A GainMaker Amplifier to a GainMaker Node 3-1

Installing the Upgrade Kit

Upgrading an Existing Housing Lid Follow these steps to upgrade an amplifier housing with the newer housing lid.

1. Using a torque wrench, loosen the six closure bolts in the housing lid, and open the housing.

55

33

22

11

44

66

T9748

Closure Bolts

Closure Bolts

2. Disconnect all power sources from the housing.

3. Unplug the 10-pin keyed connector of the power supply cable from the amplifier module.

1.5

6

4.53.5

6.5

6.5

6.5

REVEQ0

FWDINPUT

AUX2

AUX1

MAIN

REV

REV IN-20dB

REV OUT-20dB

REV AUX2IN PAD

REV AMPIN -2dB

REV EQ

REVOUTPAD

FWD IN-20dB

FWD INPAD

750 MHz870 MHz

FWD IN EQ

AC TEST

DC TEST


FWD OUT& REV INJ

-20dB

FWD

REV

FWD

REV

FWD

FWD

HPF/EQ BODE

SWITCH

FROMSTATMON

TOSTATMON

I/SPAD

MANUALBACKOFF

AGC PAD

S1

2 31

FWDAUX1OUTPAD

FWDMAINOUTPAD

SYSTRIM

AGCGAIN

FWD OUT& REV INJ

-20dB

REV IN-20dB

FWD OUT& REV INJ

-20dB

REV IN-20dB

I/S EQ

AUXSIGNAL DIR

AUX1

AUX2THERMALAGC

40 / 5242 / 5455 / 7065 / 86

REV AUX1IN PAD

REV MAININ PAD

IF AGC INSTALLED

S1 SWITCH FUNCTIONS

SET UP MODE AGCON3

THERM1

MAN2


AMP +COAX

3

AMPONLY

1

OFF

2

REV

6

6

T9641

10-pin Keyed Connector

EQ

6.5

REV AMPIN -2dB

DC TEST

BODE

FROMSTATMON

6

I/SPAD

FWDMAINOUTPAD

SYSTRIM

Power HarnessSnap Location

Retainer Clips

4. Remove the power cable from the white plastic retainer clips.

5. Disconnect the power cable harness from the holes in the amplifier module cover.

6. Firmly grasp the housing lid.


3-2 Changing A GainMaker Amplifier to a GainMaker Node 744490 Rev B

Installing the Upgrade Kit, Continued

7. Using a Phillips-head screwdriver, remove the locking screw from the housing hinge. The housing lid will now swivel completely open, allowing it to be removed from the housing base.

WARNING:

It is possible for the housing lid to separate from the housing base during this procedure and fall to the ground, possibly causing injury or damage to persons or property below.

Important: Place the old housing lid in a safe place until it can be disposed of properly.

8. Firmly grasp the configured GainMaker Node housing lid and assemble to the housing bottom, swiveling it into place on the housing hinge.

WARNING:

It is possible for the housing lid to separate from the housing base during this procedure and fall to the ground, possibly causing injury or damage to persons or property below.

9. Use a Phillips-head screwdriver to replace the locking screw and tighten from 5 in-lb to 8 in-lb (0.57 Nm to 0.90 Nm).




Upgrading the GainMaker RF Amplifier Module Follow these steps to upgrade the RF amplifier module to a GainMaker Node launch amplifier module.

WARNING:

Protect yourself from electric shock and your system from damage! Take precautions when working with this equipment. Certain components can deliver an electrical shock or cause burns. Disconnect power before attempting this procedure.

CAUTION:

RF connectors and housing seizure assemblies can be damaged if AC shunt power directors are not removed from the system amplifier before removing the amplifier module from the housing.

1. Using a T-15 Torx bit screwdriver or Phillips-head screwdriver, loosen the amplifier cover screws, and then remove the cover.

Note: The screws are captive to the cover, so they will not become lost.

1.5

6

4.53.5

6.5

6

1.5

1.51.25

REVEQ0

FWDINPUT

AUX2

AUX1

MAIN

REV

REV IN-20dB

REV AUX2IN PAD

REV AUX2IN PAD

REV AMPIN -2dB

REV EQ

REVOUTPAD

FWD INPAD

750 MHz870 MHz

FWD INEQ

ACTEST

DCTEST


FWD OUT& REV INJ

-20dB

FWD

REV

FWD

FWD

HPF/EQ BODE

SWITCH

I/SPAD

MANUALBACKOFF

AGC PAD

S1

2 31

FWDAUX1OUTPAD

FWDMAINOUTPAD

SYSTRIM

AGCGAIN

FWD OUT& REV INJ

-20dB

REV IN-20dB

FWD OUT& REV INJ

-20dB

REV IN-20dB

I/S EQ

AUXSIGNAL DIR

AUX1

AUX2THERMALAGC

40 / 5242 / 5455 / 7065 / 86

REV AUX1IN PAD

REV MAININ PAD

IF AGC INSTALLED

S1 SWITCH FUNCTIONS

SET UP MODE AGCON3

THERM1

MAN2


AMP +COAX

3

AMPONLY

1

OFF

2

REVFWD INFROMRCVR

REV OUTTO XMTR

0

6.5

T9728

Amplifier Cover Screws




2. Remove the input diplex filter (detailed below) and replace with the RF interface board assembly.

1.5

6

4.53.5

6.5

6.5

6.5

REVEQ0

6

6

T9734

1.5

ForwardInput ACShunt

RemoveDiplex Filter

Insert RF Interface Board Assembly

Notch inHousing

RF Interface Board Assembly

Notch inInterfaceBoardAssemblyHousing

Important: Be sure the interface board is oriented in the exact position (with the notch facing outward) as shown in the illustration. If the board is positioned in any other direction, the cover will not fit properly.




3. Remove the existing interstage equalizer (yellow cover) and replace with the cable to linear equalizer (white cover) provided with the upgrade kit. (The EQ is keyed so that it cannot be installed incorrectly.)

1.5

6

4.53.5

6.5

6.5

6.5

REVEQ0

6

6

T9643

RemoveInterstage EQ

Insert Cableto Linear EQ

4. Using either a Phillips-head or T-15 Torx bit screwdriver, secure the new

GainMaker Node cover to the amplifier module (provided with the kit) by tightening the amplifier cover screws from 10-in-lb to 12 in-lb (1.3 Nm to 1.4 Nm).

Important: The cover should lie completely flat on the amplifier chassis. Make sure none of the amplifier accessories prevent the cover from lying flat.

FWDINPUT

AUX2

AUX1

MAIN

REV

REV IN-20dB

REV AUX2IN PAD

REV AUX2IN PAD

REV AMPIN -2dB

REV EQ

REVOUTPAD

FWD INPAD

750 MHz870 MHz

FWD INEQ

ACTEST

DCTEST


FWD OUT& REV INJ

-20dB

FWD

REV

FWD

FWD

HPF/EQ BODE

SWITCH

I/SPAD

MANUALBACKOFF

AGC PAD

S1

2 31

FWDAUX1OUTPAD

FWDMAINOUTPAD

SYSTRIM

AGCGAIN

FWD OUT& REV INJ

-20dB

REV IN-20dB

FWD OUT& REV INJ

-20dB

REV IN-20dB

I/S EQ

AUXSIGNAL DIR

AUX1

AUX2THERMALAGC

40 / 5242 / 5455 / 7065 / 86

REV AUX1IN PAD

REV MAININ PAD

IF AGC INSTALLED

S1 SWITCH FUNCTIONS

SET UP MODE AGCON3

THERM1

MAN2


AMP +COAX

3

AMPONLY

1

OFF

2

REVFWD INFROMRCVR

REV OUTTO XMTR

T9644




Routing the Cables Follow these instructions to route the cables.

1. Once the amplifier cover is secure, snap the power cable harness from the GainMaker Node lid into the holes in the amplifier module cover. Be sure the power cable harness locking tabs are fully seated under the cover. See the illustration below for power cable harness snap location.

1.5

6

4.53.5

6.5

6.5

6.5

REVEQ0

FWDINPUT

AUX2

AUX1

MAIN

REV

REV IN-20dB

REV OUT-20dB

REV AUX2IN PAD

REV AMPIN -2dB

REV EQ

REVOUTPAD

FWD IN-20dB

FWD INPAD

750 MHz870 MHz

FWD IN EQ

AC TEST

DC TEST


FWD OUT& REV INJ

-20dB

FWD

REV

FWD

REV

FWD

FWD

HPF/EQ BODE

SWITCH

FROMSTATMON

TOSTATMON

I/SPAD

MANUALBACKOFF

AGC PAD

S1

2 31

FWDAUX1OUTPAD

FWDMAINOUTPAD

SYSTRIM

AGCGAIN

FWD OUT& REV INJ

-20dB

REV IN-20dB

FWD OUT& REV INJ

-20dB

REV IN-20dB

I/S EQ

AUXSIGNAL DIR

AUX1

AUX2THERMALAGC

40 / 5242 / 5455 / 7065 / 86

REV AUX1IN PAD

REV MAININ PAD

IF AGC INSTALLED

S1 SWITCH FUNCTIONS

SET UP MODE AGCON3

THERM1

MAN2


AMP +COAX

3

AMPONLY

1

OFF

2

REV

6

6T9641

10-pin Keyed Connector

EQ

6.5

REV AMPIN -2dB

DC TEST

BODE

FROMSTATMON

6

I/SPAD

FWDMAINOUTPAD

SYSTRIM

Power HarnessSnap Location

Retainer Clips

2. Route the power cable through the power harness and into the white plastic retainer clips on the module cover.

3. Plug the 10-pin keyed connector of the power cable into the 10-pin keyed connector slot.

T9645

1.5

1.5

1.51.25

REVEQ0

FWDINPUT

AUX2

AUX1

MAIN

REV

REV IN-20dB

REV AUX2IN PAD

REV AUX2IN PAD

REV AMPIN -2dB

REV EQ

REVOUTPAD

FWD INPAD

750 MHz870 MHz

FWD INEQ

ACTEST

DCTEST


FWD OUT& REV INJ

-20dB

FWD

REV

FWD

FWD

HPF/EQ BODE

SWITCH

I/SPAD

MANUALBACKOFF

AGC PAD

S1

2 31

FWDAUX1OUTPAD

FWDMAINOUTPAD

SYSTRIM

AGCGAIN

FWD OUT& REV INJ

-20dB

REV IN-20dB

FWD OUT& REV INJ

-20dB

REV IN-20dB

I/S EQ

AUXSIGNAL DIR

AUX1

AUX2THERMALAGC

40 / 5242 / 5455 / 7065 / 86

REV AUX1IN PAD

REV MAININ PAD

IF AGC INSTALLED

S1 SWITCH FUNCTIONS

SET UP MODE AGCON3

THERM1

MAN2


AMP +COAX

3

AMPONLY

1

OFF

2

REVFWD INFROMRCVR

REV OUTTO XMTR

0

10-pin Keyed Connector Slot

Note: The connector can be attached only one way. Be sure it installs securely to the module.




4. Plug the red tipped RF cable (reverse) into the slot labeled REV TO XMTR and the black tipped RF cable (forward) from the GainMaker Node lid into the slot labeled FWD IN FROM RCVR on the module cover.

Important: Make sure the ferrite beads are in the exact location as shown in the illustration above.

1.5

1.5

1.51.25

REVEQ0

FWDINPUT

AUX2

AUX1

MAIN

REV

REV IN-20dB

REV AUX2IN PAD

REV AUX2IN PAD

REV AMPIN -2dB

REV EQ

REVOUTPAD

FWD INPAD

750 MHz870 MHz

FWD INEQ

ACTEST

DCTEST


FWD OUT& REV INJ

-20dB

FWD

REV

FWD

FWD

HPF/EQ BODE

SWITCH

I/SPAD

MANUALBACKOFF

AGC PAD

S1

2 31

FWDAUX1OUTPAD

FWDMAINOUTPAD

SYSTRIM

AGCGAIN

FWD OUT& REV INJ

-20dB

REV IN-20dB

FWD OUT& REV INJ

-20dB

REV IN-20dB

I/S EQ

AUXSIGNAL DIR

AUX1

AUX2THERMALAGC

40 / 5242 / 5455 / 7065 / 86

REV AUX1IN PAD

REV MAININ PAD

IF AGC INSTALLED

S1 SWITCH FUNCTIONS

SET UP MODE AGCON3

THERM1

MAN2


AMP +COAX

3

AMPONLY

1

OFF

2

REVFWD INFROMRCVR

REV OUTTO XMTR

0

T9646

Power Cable

Reverse RF Cable

Forward RF Cable

Forward RF Cable Ferrite BeadsForward RF Cable Ferrite Beads

Reverse RF Cable Ferrite Beads

5. Close the GainMaker Node housing. Refer to Closing the Housing in Section A of Chapter 2.

Important: Please refer to Forward Path Balancing Procedures in Section B of Chapter 4 for proper setup and balancing of fiber routing paths.


Chapter 4 Balancing and Setup of the GainMaker Node

Overview

Introduction This chapter is divided into three sections and provides instructions for selecting and implementing the correct balancing methods for the GainMaker Node in your cable system.

Chapter Contents Balancing sets the operating levels of the station to ensure proper performance.

Important: Read Section A for information on the equipment required for balancing, and how to decide which forward path balancing method is correct for your system installation.

Section Topic See Page

A Balancing Preparation 4-2

B Forward Path Balancing Procedures 4-9

C Reverse Path Balancing Procedures 4-34

744490 Rev B Balancing and Setup of the GainMaker Node 4-1

Section A Balancing Preparation

Overview

Section Contents Before beginning forward path balancing of the GainMaker Node, it is important to review and understand the following information.

Reading this information will give you the information you need to decide which balancing process is appropriate for your GainMaker Node.

Topic See Page

Preparing for Balancing 4-3

Understanding Switch 1 Functions 4-4

Verifying Amplifier Input Signal 4-8

4-2 Balancing and Setup of the GainMaker Node 744490 Rev B

Preparing for Balancing

Before You Start Before beginning balancing, make sure you have configured the Node according to the specifications in your design print and that the Node has warmed up for approximately 1 hour.

You need the following for balancing.

You need a ... To ...

copy of the design print determine expected input and output signal levels.

torque wrench with a 1/2-in. socket open and close the system amplifier housing.

spectrum analyzer or signal analysis meter, capable of working with frequencies up to the highest design frequency

determine absolute and relative signal levels.

test point adapter (part number 562580) or an F-81 female-to-female adapter

access the test ports.

length of 75 Ohm cable, with F-connectors on each end

connect the test point adapter to the test equipment.

voltmeter test the power supply AC and DC voltages.

1/8-in. flathead screw driver Adjust switch 1, AGC Manual Backoff, and AGC Gain Control.


Understanding Switch 1 Functions

Introduction Switch 1 is a multifunction, three position switch. Switch 1 setting functions are determined by whether or not an AGC is installed in the station.

When an AGC is installed in the station, it is an AGC station. In an AGC station, Switch 1 provides two setup modes and one operational mode.

When there is no AGC installed in the station, it is a Thermal station. In a Thermal station, Switch 1 provides two operational modes.

Switch 1 Positions and Modes for AGC Stations The mode you decide to use to balance an AGC station determines in which position you place Switch 1. • Position 1 – Set the switch to this position for Thermal Setup Mode • Position 2 - Set the switch to this position for Manual Setup Mode • Position 3 – Set the switch to this position for AGC Operational Mode

Note: AGC Operational Mode is used only after the station has been initially balanced in either Thermal or Manual Setup Mode.

Bode Network The Bode Network, or Bode, is an interstage variable attenuation and slope network whose loss characteristics are driven by DC control voltage.

The position of Switch 1 sets the DC control voltage driving the Bode according to the setup mode or operational mode required for the station.

Refer to the table on the next page for more information on choosing the correct switch position for your application.

Note: Consult your system’s Technical Supervisor or Manager for more information about which choice of setup mode to use as this may be dictated by your System or Corporate Engineering Policy.



Understanding Switch 1 Functions, Continued

Switch 1 Position Information for AGC Stations

Position 1 Thermal Setup Mode

Position 2 Manual Setup Mode

Position 3 AGC Operational Mode

A thermistor (thermal) driven circuit on the amplifier sets the DC control voltage that drives the Bode.

This circuit detects the amplifier’s internal temperature and generates the proper level of DC control voltage, setting the proper loss characteristics of the Bode with respect to the current outdoor temperature.

Note: This is the same as the “Thermal” toggle switch setting on most prior AGCs.

The Manual Backoff potentiometer sets the DC control voltage that drives the Bode.

Manually adjusting the Manual Backoff potentiometer sets the proper loss characteristics of the Bode with respect to the current outdoor temperature.

Manual adjustment is done by monitoring the amplifier RF output level and adjusting the potentiometer to reduce the gain “x” dB from the full gain (minimum loss) of the potentiometer setting.

The value of “x” (gain reduction) is dependant upon outside temperature and is determined by consulting Manual Backoff Chart in Section B later in this chapter.

Note: This is the same as the “Manual” toggle switch setting on some prior AGCs.

The AGC detector circuit monitors the AGC pilot carrier level at the input to the AGC module. The detected AGC pilot carrier level variations cause a proportional variation of the DC control voltage that drives the Bode.

Important: The switch must be left in this position after initial balancing in order for the AGC to function with the Bode properly.

The AGC and Bode combination thus cause offsetting gain and slope variations to occur as needed, holding the actual amplifier output stable.

Note: This is the same as the “Auto” toggle switch setting on all prior AGCs.

Note: AGC Operational Mode is used only after the station has been initially balanced in either Thermal or Manual Setup Mode.




Switch 1 Positions for Thermal Network Configured Stations The mode of thermal compensation you select for a Thermal station determines in which position you place Switch 1. • Position 1 - Set the switch to this position if you prefer Amplifier Only

Compensation Mode • Position 2 - NOT USED • Position 3 - NOT USED

Bode Network The Bode Network, or Bode, is an interstage variable attenuation and slope network whose loss characteristics are driven by DC control voltage.

The position of Switch 1 sets the DC control voltage driving the Bode according to the setup mode or operational mode required for the station.

Refer to the table on the next page for more information on choosing the correct switch position for your application.

Note: Consult your system’s Technical Supervisor or Manager for more information about which choice of setup mode to use as this may be dictated by your System or Corporate Engineering Policy.




Switch 1 Position Information for Thermal Configured Stations

Position 1 Amplifier Only

Position 2 NOT USED

Position 3 Amplifier and Coax

NOT USED

A thermistor (thermal) driven circuit on the amplifier sets the DC control voltage that drives the Bode.

This circuit detects the amplifier’s internal temperature and generates the proper level of DC control voltage, setting the proper loss characteristics of the Bode with respect to the current outdoor temperature.

Note: This switch position is meant to compensate for the temperature related level variations of the amplifier only. This switch position is normally selected when underground cable precedes the station, since such cable is subject to little temperature variation.

Important: Do not select this position. This position is reserved for stations with an AGC installed.

While adjustments to the Manual Backoff potentiometer will affect amplifier gain with S1 in this position, once S1 is set to position 1 or 3, the manual potentiometer setting will not affect proper thermal amplifier operation.

Leaving the switch in this position disables the thermistor (thermal) driven circuit and enables the backoff potentiometer on the amplifier. This sets the DC control voltage that drives the Bode to a constant setting, irregardless of the current outdoor temperature.

Note: This is a factory setting used to verify proper station gain with a given amount of manual gain backoff.

Note: This switch position is meant to compensate for the temperature related level variations of both the amplifier and the coaxial cable preceding the station. This switch position is normally selected when overhead cable precedes the station, since such cable is subject to temperature variation, therefore this position is not recommended to be used for Nodes.

Note: Switch 1 in Position 2, and the backoff potentiometer, are used in AGC stations only.


Verifying Amplifier Input Signal

Testing Input Signal Levels Follow the steps below to test the input signal level.

Important: You cannot balance the amplifier without the proper input signals.

1. Connect the test equipment to the output test point on the receiver as shown in the diagram below.

Important: The receiver output test point performs as the input test point for the amplifier.

T9778

0

RCVR

-20 dBRF TEST

Pad

Power On

Optical Power Level

OpticalPower Alert

-20 dB Input/Output Test Point

2. Measure the signal level at the following frequencies: • The lowest frequency specified in the system design, and • The highest frequency specified in the system design.

3. Compare the measured levels to the design input levels on the system design sheet.

Note: Add 20 dB to the measured levels to find the true levels. The test point attenuates input signals by 20 dB.

4. Are measured levels within the desired limits?

If yes, proceed to step 5.

If no, or if no signals are present, find the problem before proceeding. You cannot balance the amplifier without the proper input signals.

5. Remove the test point adapter from the forward input test point (leaving other equipment connectors intact).


Section B Forward Path Balancing Procedures

Overview

Section Contents It is necessary to use the correct procedure for forward path balancing. Refer to Selecting the Proper Procedure for Forward Path Balancing for help on deciding which procedure best fits your system installation and amplifier type.

Topic See Page

Selecting the Proper Procedure for Forward Path Balancing 4-10

Forward Path Balancing for AGC Stations Using Manual Setup Mode 4-11

Forward Path Balancing for AGC Stations Using Thermal Setup Mode

4-21

Forward Path Balancing for Thermal Stations Using Amplifier Only Compensation Mode

4-28

Forward Path Balancing Using Trim Networks 4-32


Selecting the Proper Procedure for Forward Path Balancing

Procedure Table Refer to the following table to direct you to the proper starting point to balance your amplifier using your preferred method.

If you have … and you use … go to …

an amplifier configuredwith an AGC

manual setup mode for balancing and operation

4-11


thermal setup mode for balancing and operation

4-21

a thermal amplifier (no AGC)

amplifier only compensation mode for balancing and operation

4-28


a trim network for balancing 4-32


Forward Path Balancing for AGC Stations Using Manual Setup Mode

Before You Start Before beginning balancing, make sure you have configured the amplifier module according to the specifications in the design print and that the amplifier has warmed up for approximately 1 hour.

Setting the Manual Backoff Level You must adjust the manual backoff level. To set the manual backoff level, follow the steps in the table below.

1. Connect an RF meter or spectrum analyzer to the forward main output test point. Refer to the illustration in step one of Determining Output Tilt in this section for the location of the forward main output test point.

2. Set switch S1 to position number 2.

1.5

6

4.53.5

6.5

6

1.5

1.51.25

REVEQ0

FWDINPUT

AUX2

AUX1

MAIN

REV

REV IN-20dB

REV AUX2IN PAD

REV AUX2IN PAD

REV AMPIN -2dB

REV EQ

REVOUTPAD

FWD INPAD

750 MHz870 MHz

FWD INEQ

ACTEST

DCTEST


FWD OUT& REV INJ

-20dB

FWD

REV

FWD

FWD

HPF/EQ BODE

SWITCH

I/SPAD

MANUALBACKOFF

AGC PAD

S1

2 31

FWDAUX1OUTPAD

FWDMAINOUTPAD

SYSTRIM

AGCGAIN

FWD OUT& REV INJ

-20dB

REV IN-20dB

FWD OUT& REV INJ

-20dB

REV IN-20dB

I/S EQ

AUXSIGNAL DIR

AUX1

AUX2THERMALAGC

40 / 5242 / 5455 / 7065 / 86

REV AUX1IN PAD

REV MAININ PAD

IF AGC INSTALLED

S1 SWITCH FUNCTIONS

SET UP MODE AGCON3

THERM1

MAN2


AMP +COAX

3

AMPONLY

1

OFF

2

REVFWD INFROMRCVR

REV OUTTO XMTR

0

6.5

T9735

6.5S1

2 31

3. Turn the MANUAL BACKOFF potentiometer fully counterclockwise for

maximum gain.

1.5

6

4.53.5

6.5

6

1.5

1.51.25

REVEQ0

FWDINPUT

AUX2

AUX1

MAIN

REV

REV IN-20dB

REV AUX2IN PAD

REV AUX2IN PAD

REV AMPIN -2dB

REV EQ

REVOUTPAD

FWD INPAD

750 MHz870 MHz

FWD INEQ

ACTEST

DCTEST


FWD OUT& REV INJ

-20dB

FWD

REV

FWD

FWD

HPF/EQ BODE

SWITCH

I/SPAD

MANUALBACKOFF

AGC PAD

S1

2 31

FWDAUX1OUTPAD

FWDMAINOUTPAD

SYSTRIM

AGCGAIN

FWD OUT& REV INJ

-20dB

REV IN-20dB

FWD OUT& REV INJ

-20dB

REV IN-20dB

I/S EQ

AUXSIGNAL DIR

AUX1

AUX2THERMALAGC

40 / 5242 / 5455 / 7065 / 86

REV AUX1IN PAD

REV MAININ PAD

IF AGC INSTALLED

S1 SWITCH FUNCTIONS

SET UP MODE AGCON3

THERM1

MAN2


AMP +COAX

3

AMPONLY

1

OFF

2

REVFWD INFROMRCVR

REV OUTTO XMTR

0

6.5

T9736Manual Backoff Continued on next page


Forward Path Balancing for AGC Stations Using Manual Setup Mode, Continued

4. Determine the outside temperature at the amplifier location.

5. Refer to the Manual Backoff Chart on the following page to find the proper manual backoff level for the current temperature and reference frequency.

6. Turn the MANUAL BACKOFF potentiometer clockwise to reduce the output level by the amount specified in the Manual Backoff Chart.

Note: After making this adjustment, do not adjust the MANUAL BACKOFF potentiometer again.

7. Proceed to Determining Output Tilt.




Manual Backoff Chart The following table displays the manual backoff level for selected frequencies and various temperatures.

Back-off level at ...

Temperature 445.25 MHz 547.25 MHz 750 MHz 870 MHz

60°C 140°F 0.0 dB 0.0 dB 0.0 dB 0.0 dB

55°C 131°F 0.4 dB 0.4 dB 0.5 dB 0.6 dB

50°C 122°F 0.7 dB 0.8 dB 1.0 dB 1.1 dB

45°C 113°F 1.1 dB 1.3 dB 1.5 dB 1.7 dB

40°C 104°F 1.5 dB 1.6 dB 2.0 dB 2.2 dB

35°C 95°F 1.9 dB 2.1 dB 2.5 dB 2.8 dB

30°C 86°F 2.3 dB 2.5 dB 3.0 dB 3.4 dB

25°C 77°F 2.6 dB 2.9 dB 3.5 dB 3.9 dB

20°C 68°F 3.1 dB 3.4 dB 4.1 dB 4.5 dB

15°C 59°F 3.4 dB 3.7 dB 4.5 dB 5.0 dB

10°C 50°F 3.7 dB 4.1 dB 5.0 dB 5.5 dB

5°C 41°F 4.1 dB 4.5 dB 5.4 dB 6.0 dB

0°C 32°F 4.4 dB 4.9 dB 5.9 dB 6.5 dB

-5°C 23°F 4.7 dB 5.2 dB 6.3 dB 7.0 dB

-10°C 14°F 5.1 dB 5.7 dB 6.7 dB 7.5 dB

-15°C 5°F 5.4 dB 6.0 dB 7.3 dB 8.0 dB

-20°C -4°F 5.8 dB 6.4 dB 7.8 dB 8.5 dB

-25°C -13°F 6.1 dB 6.8 dB 8.3 dB 9.0 dB

-30°C -22°F 6.4 dB 7.2 dB 8.7 dB 9.5 dB

-35°C -31°F 6.8 dB 7.6 dB 9.2 dB 10.0 dB

-40°C -40°F 7.1 dB 8.0 dB 9.7 dB 10.5 dB




Determining Output Tilt To determine the output tilt of the amplifier, follow the steps below.

1. Connect the test point adapter to the forward main output test point shown in the diagram below.

1.5

6

4.53.5

6.5

6

1.5

1.51.25

REVEQ0

FWDINPUT

AUX2

AUX1

MAIN

REV

REV IN-20dB

REV AUX2IN PAD

REV AUX2IN PAD

REV AMPIN -2dB

REV EQ

REVOUTPAD

FWD INPAD

750 MHz870 MHz

FWD INEQ

ACTEST

DCTEST


FWD OUT& REV INJ

-20dB

FWD

REV

FWD

FWD

HPF/EQ BODE

SWITCH

I/SPAD

MANUALBACKOFF

AGC PAD

S1

2 31

FWDAUX1OUTPAD

FWDMAINOUTPAD

SYSTRIM

AGCGAIN

FWD OUT& REV INJ

-20dB

REV IN-20dB

FWD OUT& REV INJ

-20dB

REV IN-20dB

I/S EQ

AUXSIGNAL DIR

AUX1

AUX2THERMALAGC

40 / 5242 / 5455 / 7065 / 86

REV AUX1IN PAD

REV MAININ PAD

IF AGC INSTALLED

S1 SWITCH FUNCTIONS

SET UP MODE AGCON3

THERM1

MAN2


AMP +COAX

3

AMPONLY

1

OFF

2

REVFWD INFROMRCVR

REV OUTTO XMTR

0

6.5

T9737

Forward Main OutputTest Point

Aux2 Forward OutputTest Point


2. Consult the design print to find the proper output tilt.

3. Measure the output signal levels at the frequencies you used in Testing Input Signal Levels.

4. To determine the actual output tilt, calculate the difference (in dB) between the levels of the lowest and highest specified frequencies.

5. Proceed to Setting the Output Tilt.

Setting the Output Tilt Equalizers (EQs) are available in 1.5 dB (cable equivalent) increments. A 1.5 dB change in value changes the difference between low and high frequencies by approximately 1 dB. • Increasing the equalizer value reduces the level at lower frequencies, relative to the

level at 750/870 MHz. • Decreasing the equalizer value increases the level at lower frequencies, relative to

the level at 750/870 MHz.




To select the proper forward input equalizer value, follow the steps below.

1. Compare the calculated output tilt in step 4 of Determining Output Tilt with the design tilt (on the design print).

2. Is the output tilt within ±0.5 dB of the design tilt? • If the output tilt is within ±0.5 dB of the design tilt, proceed to Setting the

Output Level. • If the output tilt is more than design tilt, replace the forward input EQ with

a lower value. • If the output tilt is less than design tilt, replace the forward input EQ with a

higher value.

Important: The forward interstage equalizer is installed at the factory and should not be changed in the field. While it is an 870 MHz equalizer, it is appropriate for use in both 870 MHz and 750 MHz applications.

3. Re-measure the output tilt, and return to step 1.

Setting the Output Level After setting the tilt, follow the steps below to select the proper pad values for the amplifier. The output level of the amplifier is set by selecting the proper pad value.

1. Connect the test probe to the forward main output test point. See illustration on previous page for forward main output test point location.

2. Measure the output level at the highest design frequency, and compare this level with the design level (on the design print).

3. Is the measured output level within ±0.5 dB of the design level? • If the output level is within ±0.5 dB of the design output level proceed to

step 5. • If the output level is more than the design output level, replace the forward

input pad with a higher value pad. • If the output level is less than the design level, replace the forward input

pad with a lower value pad.




4. Repeat steps 2 and 3 until the output level is correct.

Note: On the High Gain Dual, the type of plug-in signal director installed directly affects the signal level measured at the Aux RF output test points. This is because the Aux RF output test points are located after the signal director in the forward RF signal path instead of before as in previous versions of system amplifiers (II, II+, and III). The test points now reflect the actual output of the port. It is important to determine if the Aux output level specified on the design print is the level before or after the signal director. If it is the level after the signal director (port output level) the test point should match the print design level. If it is the level before the signal director, the test point level should be “x” dB lower than the print design level, where “x” is the insertion loss of the signal director feeding the particular Aux port being balanced.

5. Proceed to Automatic Gain Control Setup.




Automatic Gain Control Setup This section provides procedures and tables for configuring and aligning the AGC in the GainMaker amplifiers. The table containing AGC attenuator values are required to select the proper AGC attenuator value based upon actual AGC pilot carrier output level.

Notes: • Output levels are measured at the pilot frequency. • The standard single-pilot AGC makes amplifier output adjustments based on the

level of the pilot frequency carrier. You should activate the pilot carrier with its final unscrambled video source before beginning balance and alignment.

Diagram The following diagram shows the location of the AGC related switch, controls, and AGC pad.

1.5

6

4.53.5

6.5

6

1.5

1.51.25

REVEQ0

FWDINPUT

AUX2

AUX1

MAIN

REV

REV IN-20dB

REV AUX2IN PAD

REV AUX2IN PAD

REV AMPIN -2dB

REV EQ

REVOUTPAD

FWD INPAD

750 MHz870 MHz

FWD INEQ

ACTEST

DCTEST


FWD OUT& REV INJ

-20dB

FWD

REV

FWD

FWD

HPF/EQ BODE

SWITCH

I/SPAD

MANUALBACKOFF

AGC PAD

S1

2 31

FWDAUX1OUTPAD

FWDMAINOUTPAD

SYSTRIM

AGCGAIN

FWD OUT& REV INJ

-20dB

REV IN-20dB

FWD OUT& REV INJ

-20dB

REV IN-20dB

I/S EQ

AUXSIGNAL DIR

AUX1

AUX2THERMALAGC

40 / 5242 / 5455 / 7065 / 86

REV AUX1IN PAD

REV MAININ PAD

IF AGC INSTALLED

S1 SWITCH FUNCTIONS

SET UP MODE AGCON3

THERM1

MAN2


AMP +COAX

3

AMPONLY

1

OFF

2

REVFWD INFROMRCVR

REV OUTTO XMTR

0

6.5

T9738

Manual Backoff Switch 1

AGC Gain

AGC Pad 4.53.5

6.5MANUAL

BACKOFF

AGC PAD

S1

2 31

AGCGAIN

REV AUX1IN PAD

REV MAININ PAD




Selecting the AGC Pad Value Use one of the following formulas to determine the correct AGC pad value.

High Gain Dual and Balanced Triple

AGC Pad Value = RF output level @ pilot frequency (main output port) - 34 dB

Unbalanced Triple


Once you have determined the correct AGC pad value, install it in the amplifier in the AGC pad slot and proceed to Aligning the AGC Module. For the location of the AGC pad slot, refer to the diagram on the previous page.

Aligning the AGC Module To align the AGC module, follow these steps.

1. Make sure that switch S1 is set to position number 2.

1.5

6

4.53.5

6.5

6

1.5

1.51.25

REVEQ0

FWDINPUT

AUX2

AUX1

MAIN

REV

REV IN-20dB

REV AUX2IN PAD

REV AUX2IN PAD

REV AMPIN -2dB

REV EQ

REVOUTPAD

FWD INPAD

750 MHz870 MHz

FWD INEQ

ACTEST

DCTEST


FWD OUT& REV INJ

-20dB

FWD

REV

FWD

FWD

HPF/EQ BODE

SWITCH

I/SPAD

MANUALBACKOFF

AGC PAD

S1

2 31

FWDAUX1OUTPAD

FWDMAINOUTPAD

SYSTRIM

AGCGAIN

FWD OUT& REV INJ

-20dB

REV IN-20dB

FWD OUT& REV INJ

-20dB

REV IN-20dB

I/S EQ

AUXSIGNAL DIR

AUX1

AUX2THERMALAGC

40 / 5242 / 5455 / 7065 / 86

REV AUX1IN PAD

REV MAININ PAD

IF AGC INSTALLED

S1 SWITCH FUNCTIONS

SET UP MODE AGCON3

THERM1

MAN2


AMP +COAX

3

AMPONLY

1

OFF

2

REVFWD INFROMRCVR

REV OUTTO XMTR

0

6.5

T9735

6.5S1

2 31




2. Insert the test probe into the -20 dB forward main output test point on the amplifier.

1.5

6

4.53.5

6.5

6

1.5

1.51.25

REVEQ0

FWDINPUT

AUX2

AUX1

MAIN

REV

REV IN-20dB

REV AUX2IN PAD

REV AUX2IN PAD

REV AMPIN -2dB

REV EQ

REVOUTPAD

FWD INPAD

750 MHz870 MHz

FWD INEQ

ACTEST

DCTEST


FWD OUT& REV INJ

-20dB

FWD

REV

FWD

FWD

HPF/EQ BODE

SWITCH

I/SPAD

MANUALBACKOFF

AGC PAD

S1

2 31

FWDAUX1OUTPAD

FWDMAINOUTPAD

SYSTRIM

AGCGAIN

FWD OUT& REV INJ

-20dB

REV IN-20dB

FWD OUT& REV INJ

-20dB

REV IN-20dB

I/S EQ

AUXSIGNAL DIR

AUX1

AUX2THERMALAGC

40 / 5242 / 5455 / 7065 / 86

REV AUX1IN PAD

REV MAININ PAD

IF AGC INSTALLED

S1 SWITCH FUNCTIONS

SET UP MODE AGCON3

THERM1

MAN2


AMP +COAX

3

AMPONLY

1

OFF

2

REVFWD INFROMRCVR

REV OUTTO XMTR

0

6.5

T9737




3. Measure and note the RF output level at the AGC pilot frequency.

Note: Remember to add 20 dB to compensate for the test point loss.

4. Set switch S1 to position number 3 for AGC operation.

5. Adjust the AGC gain control potentiometer to match the level you measured in step 3.

1.5

6

4.53.5

6.5

6

1.5

1.51.25

REVEQ0

FWDINPUT

AUX2

AUX1

MAIN

REV

REV IN-20dB

REV AUX2IN PAD

REV AUX2IN PAD

REV AMPIN -2dB

REV EQ

REVOUTPAD

FWD INPAD

750 MHz870 MHz

FWD INEQ

ACTEST

DCTEST


FWD OUT& REV INJ

-20dB

FWD

REV

FWD

FWD

HPF/EQ BODE

SWITCH

I/SPAD

MANUALBACKOFF

AGC PAD

S1

2 31

FWDAUX1OUTPAD

FWDMAINOUTPAD

SYSTRIM

AGCGAIN

FWD OUT& REV INJ

-20dB

REV IN-20dB

FWD OUT& REV INJ

-20dB

REV IN-20dB

I/S EQ

AUXSIGNAL DIR

AUX1

AUX2THERMALAGC

40 / 5242 / 5455 / 7065 / 86

REV AUX1IN PAD

REV MAININ PAD

IF AGC INSTALLED

S1 SWITCH FUNCTIONS

SET UP MODE AGCON3

THERM1

MAN2


AMP +COAX

3

AMPONLY

1

OFF

2

REVFWD INFROMRCVR

REV OUTTO XMTR

0

6.5

AGC GainControl T9739




6. Move switch S1 back and forth between position number 2 and position number 3.

Important: Let the amplifier MODULE settle before reading signal levels.

Result: The signal level should not vary when you switch between position number 2 and position number 3. If the signal level does vary, repeat steps 4-6 as needed until the signal level does not vary between position number 2 and position number 3.

7. Set Switch 1 to position number 3 for AGC Operation Mode.

8. Proceed to Section C, Reverse Path Balancing Procedures.


Forward Path Balancing for AGC Stations Using Thermal Setup Mode


Setting Switch 1 for Thermal Setup Mode You must set Switch 1 to position number 1 to use Thermal Setup Mode.

1.5

6

4.53.5

6.5

6

1.5

1.51.25

REVEQ0

FWDINPUT

AUX2

AUX1

MAIN

REV

REV IN-20dB

REV AUX2IN PAD

REV AUX2IN PAD

REV AMPIN -2dB

REV EQ

REVOUTPAD

FWD INPAD

750 MHz870 MHz

FWD INEQ

ACTEST

DCTEST


FWD OUT& REV INJ

-20dB

FWD

REV

FWD

FWD

HPF/EQ BODE

SWITCH

I/SPAD

MANUALBACKOFF

AGC PAD

S1

2 31

FWDAUX1OUTPAD

FWDMAINOUTPAD

SYSTRIM

AGCGAIN

FWD OUT& REV INJ

-20dB

REV IN-20dB

FWD OUT& REV INJ

-20dB

REV IN-20dB

I/S EQ

AUXSIGNAL DIR

AUX1

AUX2THERMALAGC

40 / 5242 / 5455 / 7065 / 86

REV AUX1IN PAD

REV MAININ PAD

IF AGC INSTALLED

S1 SWITCH FUNCTIONS

SET UP MODE AGCON3

THERM1

MAN2


AMP +COAX

3

AMPONLY

1

OFF

2

REVFWD INFROMRCVR

REV OUTTO XMTR

0

6.5

T9740

6.5S1

2 31



Forward Path Balancing for AGC Stations Using Thermal Setup Mode, Continued



1.5

6

4.53.5

6.5

6

1.5

1.51.25

REVEQ0

FWDINPUT

AUX2

AUX1

MAIN

REV

REV IN-20dB

REV AUX2IN PAD

REV AUX2IN PAD

REV AMPIN -2dB

REV EQ

REVOUTPAD

FWD INPAD

750 MHz870 MHz

FWD INEQ

ACTEST

DCTEST


FWD OUT& REV INJ

-20dB

FWD

REV

FWD

FWD

HPF/EQ BODE

SWITCH

I/SPAD

MANUALBACKOFF

AGC PAD

S1

2 31

FWDAUX1OUTPAD

FWDMAINOUTPAD

SYSTRIM

AGCGAIN

FWD OUT& REV INJ

-20dB

REV IN-20dB

FWD OUT& REV INJ

-20dB

REV IN-20dB

I/S EQ

AUXSIGNAL DIR

AUX1

AUX2THERMALAGC

40 / 5242 / 5455 / 7065 / 86

REV AUX1IN PAD

REV MAININ PAD

IF AGC INSTALLED

S1 SWITCH FUNCTIONS

SET UP MODE AGCON3

THERM1

MAN2


AMP +COAX

3

AMPONLY

1

OFF

2

REVFWD INFROMRCVR

REV OUTTO XMTR

0

6.5

T9737














To select the proper forward input equalizer value, follow the steps in the table below.

1. Compare the actual output tilt in step 4 of Determining Output Tilt with the design tilt (on the design print).




higher value.


Setting the Output Level After setting the tilt, follow the steps in the table below to select the proper pad values for the amplifier. The output level of the amplifier is set by selecting the proper pad value.

1. Connect the test probe to the forward main output test point.










Note: On the Low Gain Dual and High Gain Dual, the type of plug-in signal director installed directly affects the signal level measured at the Aux RF output test points. This is because the Aux RF output test points are located after the signal director in the forward RF signal path instead of before as in previous versions of system amplifiers (II, II+, and III). The test points now reflect the actual output of the port. It is important to determine if the Aux output level specified on the design print is the level before or after the signal director. If it is the level after the signal director (port output level) the test point should match the print design level. If it is the level before the signal director, the test point level should be “x” dB lower than the print design level, where “x” is the insertion loss of the signal director feeding the particular Aux port being balanced.

5. Proceed to Automatic Gain Control Setup.

Automatic Gain Control Setup This section provides procedures and tables for configuring and aligning the AGC in the GainMaker amplifiers. The table containing AGC attenuator values are required to select the proper AGC attenuator value based upon actual AGC pilot carrier output level.

Notes: • Output levels are measured at the pilot frequency. • The standard single-pilot AGC makes amplifier output adjustments based on the

level of the pilot frequency carrier. You should activate the pilot carrier with its final unscrambled video source before beginning balance and alignment.




Diagram The following diagram shows the location of the AGC related switch, controls, and AGC pad.

1.5

6

4.53.5

6.5

6

1.5

1.51.25

REVEQ0

FWDINPUT

AUX2

AUX1

MAIN

REV

REV IN-20dB

REV AUX2IN PAD

REV AUX2IN PAD

REV AMPIN -2dB

REV EQ

REVOUTPAD

FWD INPAD

750 MHz870 MHz

FWD INEQ

ACTEST

DCTEST


FWD OUT& REV INJ

-20dB

FWD

REV

FWD

FWD

HPF/EQ BODE

SWITCH

I/SPAD

MANUALBACKOFF

AGC PAD

S1

2 31

FWDAUX1OUTPAD

FWDMAINOUTPAD

SYSTRIM

AGCGAIN

FWD OUT& REV INJ

-20dB

REV IN-20dB

FWD OUT& REV INJ

-20dB

REV IN-20dB

I/S EQ

AUXSIGNAL DIR

AUX1

AUX2THERMALAGC

40 / 5242 / 5455 / 7065 / 86

REV AUX1IN PAD

REV MAININ PAD

IF AGC INSTALLED

S1 SWITCH FUNCTIONS

SET UP MODE AGCON3

THERM1

MAN2


AMP +COAX

3

AMPONLY

1

OFF

2

REVFWD INFROMRCVR

REV OUTTO XMTR

0

6.5

T9738

Manual Backoff Switch 1

AGC Gain

AGC Pad 4.53.5

6.5MANUAL

BACKOFF

AGC PAD

S1

2 31

AGCGAIN

REV AUX1IN PAD

REV MAININ PAD

Selecting the AGC Pad Value Use one of the following formulas to determine the correct AGC pad value.

High Gain Dual, Low Gain Dual, and Balanced Triple


Unbalanced Triple


Once you have determined the correct AGC pad value, install it in the amplifier in the AGC pad slot and proceed to Aligning the AGC Module. For the location of the AGC pad slot, refer to the diagram on the previous page.




Aligning the AGC Module To align the AGC module, follow these steps.

1. Make sure that switch S1 is set to position number 1.

1.5

6

4.53.5

6.5

6

1.5

1.51.25

REVEQ0

FWDINPUT

AUX2

AUX1

MAIN

REV

REV IN-20dB

REV AUX2IN PAD

REV AUX2IN PAD

REV AMPIN -2dB

REV EQ

REVOUTPAD

FWD INPAD

750 MHz870 MHz

FWD INEQ

ACTEST

DCTEST


FWD OUT& REV INJ

-20dB

FWD

REV

FWD

FWD

HPF/EQ BODE

SWITCH

I/SPAD

MANUALBACKOFF

AGC PAD

S1

2 31

FWDAUX1OUTPAD

FWDMAINOUTPAD

SYSTRIM

AGCGAIN

FWD OUT& REV INJ

-20dB

REV IN-20dB

FWD OUT& REV INJ

-20dB

REV IN-20dB

I/S EQ

AUXSIGNAL DIR

AUX1

AUX2THERMALAGC

40 / 5242 / 5455 / 7065 / 86

REV AUX1IN PAD

REV MAININ PAD

IF AGC INSTALLED

S1 SWITCH FUNCTIONS

SET UP MODE AGCON3

THERM1

MAN2


AMP +COAX

3

AMPONLY

1

OFF

2

REVFWD INFROMRCVR

REV OUTTO XMTR

0

6.5

T9740

6.5S1

2 31

2. Insert the test probe into the -20 dB forward main output test point on the amplifier.

1.5

6

4.53.5

6.5

6

1.5

1.51.25

REVEQ0

FWDINPUT

AUX2

AUX1

MAIN

REV

REV IN-20dB

REV AUX2IN PAD

REV AUX2IN PAD

REV AMPIN -2dB

REV EQ

REVOUTPAD

FWD INPAD

750 MHz870 MHz

FWD INEQ

ACTEST

DCTEST


FWD OUT& REV INJ

-20dB

FWD

REV

FWD

FWD

HPF/EQ BODE

SWITCH

I/SPAD

MANUALBACKOFF

AGC PAD

S1

2 31

FWDAUX1OUTPAD

FWDMAINOUTPAD

SYSTRIM

AGCGAIN

FWD OUT& REV INJ

-20dB

REV IN-20dB

FWD OUT& REV INJ

-20dB

REV IN-20dB

I/S EQ

AUXSIGNAL DIR

AUX1

AUX2THERMALAGC

40 / 5242 / 5455 / 7065 / 86

REV AUX1IN PAD

REV MAININ PAD

IF AGC INSTALLED

S1 SWITCH FUNCTIONS

SET UP MODE AGCON3

THERM1

MAN2


AMP +COAX

3

AMPONLY

1

OFF

2

REVFWD INFROMRCVR

REV OUTTO XMTR

0

6.5

T9737







3. Measure and note the RF output level at the AGC pilot frequency.

Note: Remember to add 20 dB to compensate for the test point loss.

4. Set switch S1 to position number 3 for AGC operation.

5. Adjust the AGC gain control potentiometer to match the level you measured in step 3.

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4.53.5

6.5

6

1.5

1.51.25

REVEQ0

FWDINPUT

AUX2

AUX1

MAIN

REV

REV IN-20dB

REV AUX2IN PAD

REV AUX2IN PAD

REV AMPIN -2dB

REV EQ

REVOUTPAD

FWD INPAD

750 MHz870 MHz

FWD INEQ

ACTEST

DCTEST


FWD OUT& REV INJ

-20dB

FWD

REV

FWD

FWD

HPF/EQ BODE

SWITCH

I/SPAD

MANUALBACKOFF

AGC PAD

S1

2 31

FWDAUX1OUTPAD

FWDMAINOUTPAD

SYSTRIM

AGCGAIN

FWD OUT& REV INJ

-20dB

REV IN-20dB

FWD OUT& REV INJ

-20dB

REV IN-20dB

I/S EQ

AUXSIGNAL DIR

AUX1

AUX2THERMALAGC

40 / 5242 / 5455 / 7065 / 86

REV AUX1IN PAD

REV MAININ PAD

IF AGC INSTALLED

S1 SWITCH FUNCTIONS

SET UP MODE AGCON3

THERM1

MAN2


AMP +COAX

3

AMPONLY

1

OFF

2

REVFWD INFROMRCVR

REV OUTTO XMTR

0

6.5

AGC GainControl T9739

6. Move switch S1 back and forth between position number 1 and position number 3.

Important: Let the amplifier MODULE settle before reading signal levels.

Result: The signal level should not vary when you switch between position number 1 and position number 3. If the signal level does vary, repeat steps 4-6 as needed until the signal level does not vary between position number 1 and position number 3.

7. Set Switch 1 to position number 3 for AGC Operational Mode.



Forward Path Balancing for Thermal Stations Using Amplifier Only Compensation Mode


Setting Switch 1 for Amplifier Only Compensation Mode You must set Switch 1 to position number 1 to use Amplifier Only Compensation Mode.

1.5

6

4.53.5

6.5

6

1.5

1.51.25

REVEQ0

FWDINPUT

AUX2

AUX1

MAIN

REV

REV IN-20dB

REV AUX2IN PAD

REV AUX2IN PAD

REV AMPIN -2dB

REV EQ

REVOUTPAD

FWD INPAD

750 MHz870 MHz

FWD INEQ

ACTEST

DCTEST


FWD OUT& REV INJ

-20dB

FWD

REV

FWD

FWD

HPF/EQ BODE

SWITCH

I/SPAD

MANUALBACKOFF

AGC PAD

S1

2 31

FWDAUX1OUTPAD

FWDMAINOUTPAD

SYSTRIM

AGCGAIN

FWD OUT& REV INJ

-20dB

REV IN-20dB

FWD OUT& REV INJ

-20dB

REV IN-20dB

I/S EQ

AUXSIGNAL DIR

AUX1

AUX2THERMALAGC

40 / 5242 / 5455 / 7065 / 86

REV AUX1IN PAD

REV MAININ PAD

IF AGC INSTALLED

S1 SWITCH FUNCTIONS

SET UP MODE AGCON3

THERM1

MAN2


AMP +COAX

3

AMPONLY

1

OFF

2

REVFWD INFROMRCVR

REV OUTTO XMTR

0

6.5

T9740

6.5S1

2 31



Forward Path Balancing for Thermal Stations Using Amplifier Only Compensation Mode, Continued



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REVEQ0

FWDINPUT

AUX2

AUX1

MAIN

REV

REV IN-20dB

REV AUX2IN PAD

REV AUX2IN PAD

REV AMPIN -2dB

REV EQ

REVOUTPAD

FWD INPAD

750 MHz870 MHz

FWD INEQ

ACTEST

DCTEST


FWD OUT& REV INJ

-20dB

FWD

REV

FWD

FWD

HPF/EQ BODE

SWITCH

I/SPAD

MANUALBACKOFF

AGC PAD

S1

2 31

FWDAUX1OUTPAD

FWDMAINOUTPAD

SYSTRIM

AGCGAIN

FWD OUT& REV INJ

-20dB

REV IN-20dB

FWD OUT& REV INJ

-20dB

REV IN-20dB

I/S EQ

AUXSIGNAL DIR

AUX1

AUX2THERMALAGC

40 / 5242 / 5455 / 7065 / 86

REV AUX1IN PAD

REV MAININ PAD

IF AGC INSTALLED

S1 SWITCH FUNCTIONS

SET UP MODE AGCON3

THERM1

MAN2


AMP +COAX

3

AMPONLY

1

OFF

2

REVFWD INFROMRCVR

REV OUTTO XMTR

0

6.5

T9737














To select the proper forward input equalizer value, follow the steps in the table below.

1. Compare the actual output tilt in step 4 of Determining Output Tilt with the design tilt (on the design print).




higher value.


Setting the Output Level After setting the tilt, follow the steps below to select the proper pad values for the amplifier. The output level of the amplifier is set by selecting the proper pad value.

1. Connect the test probe to the forward main output test point.










Note: On the Low Gain Dual and High Gain Dual, the type of plug-in signal director installed directly affects the signal level measured at the Aux RF output test points. This is because the Aux RF output test points are located after the signal director in the forward RF signal path instead of before as in previous versions of system amplifiers (II, II+, and III). The test points now reflect the actual output of the port. It is important to determine if the Aux output level specified on the design print is the level before or after the signal director. If it is the level after the signal director (port output level) the test point should match the print design level. If it is the level before the signal director, the test point level should be “x” dB lower than the print design level, where “x” is the insertion loss of the signal director feeding the particular Aux port being balanced.



Forward Path Balancing Using Trim Networks

Introduction This section describes the procedure to follow when installing a trim network in a GainMaker Node.

Trim Network Description A trim network allows you to adjust the amplifier’s frequency response to be as uniform as possible across the entire output spectrum. The trim network can be adjusted (within limits) to cover a wide range of individual requirements. Type and use factor is determined by evaluating actual system frequency response. Refer to the frequency response plots in Appendix A for more information.

Trim Network Illustrations The following table contains an illustration of the trim network used in a GainMaker Node.

Part Number/Model Number

Description Illustration

714446

MSD-1NGF

Mid. Frequency Dual Peak

T9102

PN 714446

SYSTEM TRIM

MSD–1NGF

MADE IN MEXICO

J3L2L1 C2C1 E1 PN714448_1J2

J4J1R2 R1



Forward Path Balancing Using Trim Networks, Continued

Installing a Trim Network in a GainMaker Node Follow the procedures below to install a trim network in a GainMaker Node

1. Open the GainMaker Node housing. Refer to Opening the Housing in Chapter 2.

2. Switch the AGC to THERMAL.

3. Record the RF output levels.

Note: The trim network location is labeled SYS TRIM on the module cover. Refer to the illustration below.

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REVEQ0

FWDINPUT

AUX2

AUX1

MAIN

REV

REV IN-20dB

REV AUX2IN PAD

REV AUX2IN PAD

REV AMPIN -2dB

REV EQ

REVOUTPAD

FWD INPAD

750 MHz870 MHz

FWD INEQ

ACTEST

DCTEST


FWD OUT& REV INJ

-20dB

FWD

REV

FWD

FWD

HPF/EQ BODE

SWITCH

I/SPAD

MANUALBACKOFF

AGC PAD

S1

2 31

FWDAUX1OUTPAD

FWDMAINOUTPAD

SYSTRIM

AGCGAIN

FWD OUT& REV INJ

-20dB

REV IN-20dB

FWD OUT& REV INJ

-20dB

REV IN-20dB

I/S EQ

AUXSIGNAL DIR

AUX1

AUX2THERMALAGC

40 / 5242 / 5455 / 7065 / 86

REV AUX1IN PAD

REV MAININ PAD

IF AGC INSTALLED

S1 SWITCH FUNCTIONS

SET UP MODE AGCON3

THERM1

MAN2


AMP +COAX

3

AMPONLY

1

OFF

2

REVFWD INFROMRCVR

REV OUTTO XMTR

0

6.5

SystemTrim T9742

4. Remove jumper from system trim location.

5. Install the trim network into the system trim slot.

Notes: • Be sure all the pins on the system trim bottom align with the pin holes in

the system trim slot, allowing the system trim to install flat against the amplifier module.

• Make sure the components face the outside of the station. See diagram above for proper positioning.

6. After tuning the trim network for the proper response, measure the RF output level.

7. Change the interstage pad or input pad to obtain the same RF output level as noted in step 3.

8. Switch the AGC module to AUTO.

9. Reset the AGC for proper output levels.

10. Close the GainMaker Node housing. Refer to Closing the Housing in Chapter 2.


Section C Reverse Path Balancing Procedures

Overview

Section Contents This section covers reverse RF amplifier cascade balancing. For the purpose of this document, balancing refers to the process of individually aligning each reverse amplifier station’s gain and tilt characteristics in order to achieve reverse amplifier cascades that have optimum, repeatable transmission characteristics.

There are a variety of test equipment combinations that enable proper balancing of the reverse path. Regardless of the type of equipment used, the balancing process is fundamentally the same.

Topic See Page

Preparing for Reverse Path Balancing 4-35

Reverse Fiber Link Balancing 4-37

Initial Reverse Path Balancing 4-42

Completing Reverse Path Balancing 4-45


Preparing for Reverse Path Balancing

Balancing Sequence Balancing should be completed in the following order. • Reverse fiber link (node reverse optical transmitter to headend/hub reverse

optical receiver). • Individual reverse amplifier cascades that combine at the node. Start with the

amplifier closest to the node, and work from that point outward towards the first reverse amplifier in each upstream cascade.

Injection of Test Signal(s) During the balancing process, reverse RF test signals of known amplitude are injected into the reverse RF input path of the amplifier station (prior to the reverse amplification circuit). The injected signals are amplified and routed out the station’s reverse RF output port in the upstream direction. The injected test signals pass through any previously balanced amplifiers in the reverse cascade, as well as the reverse fiber link, and arrive at the node’s reverse optical receiver (typically located in the headend or hubsite).

Monitoring and Adjusting Received Amplitude and Tilt The amplitude and tilt associated with the received signals are monitored at the headend or hub at an RF test point on the output of the reverse optical receiver associated with the particular node. The received amplitude and tilt of the test signals are compared to the desired (reference value) amplitude and tilt. Any deviation from reference value amplitude or tilt are then minimized by altering the (dB) value of the output pad or equalizer in the amplifier being balanced. This process is completed for each amplifier in the reverse cascade, working outward from the node.



Preparing for Reverse Path Balancing, Continued

Methods of Generating and Monitoring Test Signals The reverse RF test signals that are to be injected into the reverse path of the amplifier being balanced may be generated by the following. • multiple CW signal (tone) generator • reverse sweep transmitter The amplitude and tilt of the received test signals at the output of the reverse optical receiver in the headend or hub may be measured and monitored using the following. • spectrum analyzer (when using a CW generator for test signals) • signal level meter (when using a CW generator for test signals) • reverse sweep receiver (when using a reverse sweep transmitter for test signal) The variance in relative amplitude and tilt of the received signal from desired (reference) may be relayed to the field technician via the following. • radio (by a second technician in the headend/hub who is monitoring a spectrum

analyzer or signal level meter) • a dedicated forward TV channel, whose associated modulator has it’s video input

being generated by a video camera focused on the spectrum analyzer display • an associated forward data carrier (if using a particular type of reverse sweep

system) If a portable reverse sweep generator with built in forward data receiver is used to generate the reverse test signals, only one technician is required to perform the balancing. This type of system is becoming increasingly popular due to it’s ease of use. In this case, the sweep system includes a combination reverse sweep receiver and forward data transmitter, which is located in the headend/hub. The frequency response characteristics of the received sweep signal (including relative amplitude and tilt) are converted by the headend sweep receiver to a data format, and transmitted in the forward RF path as a data carrier (by combining it into the forward headend combiner). The portable sweep generator/data receiver that is injecting the test signal into the amplifier’s reverse path in the field is simultaneously receiving the incoming data carrier via the forward RF path, and converting it back to a sweep display which represents what is being received by the headend unit.

Note: When using a reverse sweep system such as this, be sure to consult the manufacturer’s guide to determine proper headend combining and to ensure proper telemetry levels.


Reverse Fiber Link Balancing

Introduction This section covers reverse fiber link balancing. A reverse fiber link includes the reverse optical transmitter in the node, the reverse optical receiver in the headend/hub, and the fiber optic cable that transports the optical signal from the reverse transmitter output to the reverse receiver input. For the purpose of this document, balancing refers to the process of adjusting the RF gain of the link as needed, in order to achieve reverse optic links that have optimum, repeatable transmission characteristics.

There are a variety of test equipment combinations that enable proper balancing of the reverse path. Regardless of the type of equipment used, the balancing process is fundamentally the same.

Injection of Test Signal(s) During the balancing process, reverse RF test signal(s) of known amplitude are injected into the RF input path of the node (prior to the reverse amplifier and reverse transmitter). The injected signals are amplified and routed to the reverse optical transmitter in the station. The reverse transmitter converts the RF test signal to an optical signal and transmits it to the headend (or hub site) via fiber optic cable. At the headend, the reverse optical receiver converts the optical signal back to an RF signal that is routed out through the receiver’s RF output.

Monitoring and Adjusting Received Amplitude The amplitude of the received test signal is monitored at a headend or hub test point on the output of the reverse optical receiver associated with the particular node, and compared to the desired (“reference” value) amplitude. Any deviation from reference value amplitude is then minimized by adjusting the RF level at the receiver output. This is typically accomplished via adjustment of an RF output level control on the optical receiver, or can be accomplished via use of external attenuation at the RF output of the optical receiver.



Reverse Fiber Link Balancing, Continued

Methods of Generating and Monitoring Test Signals The reverse RF test signals that are to be injected into the reverse fiber link’s node may be generated by the following: • Multiple CW signal (tone) generator • Reverse sweep transmitter

The amplitude of the received test signals at the output of the reverse optical receiver in the headend or hub may be measured and monitored using the following: • Spectrum analyzer (when using a CW generator for test signals) • Signal level meter (when using a CW generator for test signals) • Reverse sweep receiver (when using a reverse sweep transmitter for test signal)

The variance in relative amplitude of the received signal from desired (reference) is determined and adjustments are made as needed to receiver output level by the technician, who is performing the monitoring of the received signals.

If a portable reverse sweep generator with built-in forward data receiver is used to generate the reverse test signals, two people are still required to perform the balancing of the fiber link. This type of system is becoming increasingly popular due to its ease of use, especially when aligning the reverse amplifier cascade.

In this case, the sweep system includes a combination reverse sweep receiver and forward data transmitter, which is located in the headend/hub. The frequency response characteristics of the received sweep signal (including relative amplitude and tilt) are converted by the headend sweep receiver to a data format, and transmitted in the forward path as a data carrier (by combining it into the forward headend combiner).

The portable sweep generator/data receiver that is injecting the test signals into the reverse path in the field is simultaneously receiving the incoming data carrier via the forward RF path, and converting it back to a sweep display which represents what is being received by the headend unit. While one technician in the field can monitor the received amplitude and determine whether it deviates from reference or not, any variation in amplitude required at the output of the receiver in the headend would typically be accomplished by a second technician in the headend, who is in communication with the technician in the field.

The specific steps for balancing the reverse fiber link are detailed in the next section.




Balancing and Alignment Procedures This procedure applies whether balancing the reverse along with the forward or if balancing the reverse independently. It requires one technician at the GainMaker Node and one technician at the headend (or hub site) to set up the reverse fiber link. Scientific-Atlanta recommends setting up the link with the highest optical loss budget first. Always balance the reverse fiber link before attempting to balance any of the reverse amplifiers in the distribution plant.

1. Ensure that the design value reverse pads are installed in the appropriate reverse pad slots in the launch amplifier and reverse optical transmitter input. The reverse pads are as follows: • Reverse main input pad for each station port • Reverse output pad • Reverse transmitter input pad

Note: See illustration in step 4 for location of the reverse transmitter input pad.

1.5

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4.53.5

6.5

6

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1.51.25

REVEQ0

FWDINPUT

AUX2

AUX1

MAIN

REV

REV IN-20dB

REV AUX2IN PAD

REV AUX2IN PAD

REV AMPIN -2dB

REV EQ

REVOUTPAD

FWD INPAD

750 MHz870 MHz

FWD INEQ

ACTEST

DCTEST


FWD OUT& REV INJ

-20dB

FWD

REV

FWD

FWD

HPF/EQ BODE

SWITCH

I/SPAD

MANUALBACKOFF

AGC PAD

S1

2 31

FWDAUX1OUTPAD

FWDMAINOUTPAD

SYSTRIM

AGCGAIN

FWD OUT& REV INJ

-20dB

REV IN-20dB

FWD OUT& REV INJ

-20dB

REV IN-20dB

I/S EQ

AUXSIGNAL DIR

AUX1

AUX2THERMALAGC

40 / 5242 / 5455 / 7065 / 86

REV AUX1IN PAD

REV MAININ PAD

IF AGC INSTALLED

S1 SWITCH FUNCTIONS

SET UP MODE AGCON3

THERM1

MAN2


AMP +COAX

3

AMPONLY

1

OFF

2

REVFWD INFROMRCVR

REV OUTTO XMTR

0

6.5

ReverseOutput Pad

ForwardInput Pad

T9726

ReverseMain Input

Pad

AGCPad

ForwardMain

Output Pad

Aux 1 ReverseInput Pad

Forward AuxOutput Pad

ReverseAux 2

Input Pad

InterstagePad




2. Refer to the reverse system design print and inject the proper RF signal level into the launch amplifier via the reverse injection test point. For the exact location of the reverse injection test point, refer to the illustration in step 1.

The reverse system design print should specify a “design” reverse input level at the station’s reverse input port(s). You must inject the correct signal level into the reverse injection test point using an RF test probe and a reverse sweep transmitter or a CW signal generator. The reverse injection test point has 20 dB of insertion loss (-20 dB injection point).

Note: To calculate the correct signal level to inject, you must first calculate the input level to the reverse amplifier module.

Example:

Specified port (station) input, per design = 19 dBmV

Injection test point loss = 20 dB

Port Input + Injection test point loss = Signal generator setting

19 dBmV + 20 dB = 39 dBmV

Set the signal generator output for + 39 dBmV. This signal, when injected through the reverse injection point, is attenuated by 20 dB, simulating the 19 dBmV port input level specified per design. Important Notes: • If a CW signal generator is used, at least two carriers should be

injected, one at the low end and one at the high end of the reverse bandpass. In a reverse system with a 5 MHz to 40 MHz bandpass, the low frequency carrier would be in the 5 MHz to 10 MHz range and the high frequency carrier would be in the 35 MHz to 40 MHz range.

• The amplitude of the signal generator output can be set higher or lower than the level specified by the calculation above, but the difference between the actual output level and the level calculated above must be known. If the generator output is x dB higher (or lower) than the level calculated, then the reference (desired) level received at the headend or hub should also be x dB higher (or lower) than the original headend reference level.




3. The station’s reverse input pad(s), reverse output pad, and reverse transmitter input pad are selected during the reverse system design and are based on the services to be transported by the reverse system. DO NOT CHANGE FROM DESIGN VALUES! Reverse equalizer value may be changed if needed to obtain flat receiver output levels across the reverse frequency spectrum.

4. Have the technician in the headend refer to the headend system design and set the output of the optical receiver to the specified output level. If using a sweep system that is x dB below standard design levels, be sure to consider that your receive level should also be x dB below the original design reference level.

See the instruction guide that was shipped with the optical receiver for setup procedures. It may be necessary to use an external attenuator at the RF output of the optical receiver, if the receiver does not have an RF output level adjustment control.

Note: If the required output level of the reverse receiver is not known, set up the longest optical link first. Set the remaining receivers for the same RF output level as that of the receiver connected to the longest optical link.

T9873

3XMTR RF TESTPOINTPad

Power On

Optical Power Alert

Optical Power Level

Fiber PigtailConnector

Power On LED

ReverseTransmitterInput Pad

RF TestPoint

Fiber Pigtail

OpticalPowerAlertLED Mounting

Screws

Optical Power LevelTest Point

5. Once the reverse fiber link has been properly balanced, the reverse RF amplifier cascades feeding the node can be balanced.


Initial Reverse Path Balancing

Preparing the Amplifier for Reverse Path Balancing Balance all of the reverse amplifiers off a given reverse input port for the node being worked on. The reverse amplifiers should be balanced sequentially from the node outward. Note: Make sure the reverse fiber link has been properly balanced before proceeding. Ensure that the design value reverse output equalizer and reverse pads are installed in the appropriate reverse slots in the amplifier. Refer to the following diagram. Note: Record the pad values for each input port for later use.

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REVEQ0

FWDINPUT

AUX2

AUX1

MAIN

REV

REV IN-20dB

REV AUX2IN PAD

REV AUX2IN PAD

REV AMPIN -2dB

REV EQ

REVOUTPAD

FWD INPAD

750 MHz870 MHz

FWD INEQ

ACTEST

DCTEST


FWD OUT& REV INJ

-20dB

FWD

REV

FWD

FWD

HPF/EQ BODE

SWITCH

I/SPAD

MANUALBACKOFF

AGC PAD

S1

2 31

FWDAUX1OUTPAD

FWDMAINOUTPAD

SYSTRIM

AGCGAIN

FWD OUT& REV INJ

-20dB

REV IN-20dB

FWD OUT& REV INJ

-20dB

REV IN-20dB

I/S EQ

AUXSIGNAL DIR

AUX1

AUX2THERMALAGC

40 / 5242 / 5455 / 7065 / 86

REV AUX1IN PAD

REV MAININ PAD

IF AGC INSTALLED

S1 SWITCH FUNCTIONS

SET UP MODE AGCON3

THERM1

MAN2


AMP +COAX

3

AMPONLY

1

OFF

2

REVFWD INFROMRCVR

REV OUTTO XMTR

0

6.5

ReverseOutput Pad

ForwardInput Pad

T9726

ReverseMain Input

Pad

AGCPad

ForwardMain

Output Pad

Aux 1 ReverseInput Pad

Forward AuxOutput Pad

ReverseAux 2

Input Pad

InterstagePad

Proceed to Calculate the Proper RF Signal Level.

Calculate the Proper RF Signal Level In order to calculate the correct RF signal level to inject, you must know the following. • Design Reverse Port Input Level from the design print • Total Injection Insertion Loss (20 dB) To calculate the correct signal level to inject, add the total injection insertion loss to the design port input level. Example: Design amplifier reverse port input level = 19 dBmV Total injection insertion loss = 20 dB The design amplifier reverse port input level plus injection insertion loss equals correct RF signal level to inject. 19 dBmV + 20 dB = 39 dBmV Set the signal generator output for + 39 dBmV.



Initial Reverse Path Balancing, Continued

Important: When using a CW signal generator, inject at least two carriers, one at the low end and one at the high end of the reverse bandpass. In a reverse system with a 5 MHz to 40 MHz bandpass, the low frequency carrier should be in the 5 MHz to 10 MHz range and the high frequency carrier should be in the 35 MHz to 40 MHz range.

Important: The amplitude of the signal generator output can be set higher or lower than the level specified by the calculation above, but the difference between the actual output level and the level calculated above must be known. If the generator output is x dB higher (or lower) than the level calculated, then the reference (desired) level received at the headend or hub should also be x dB higher (or lower) than the original headend reference level.

Important: The station’s reverse input pad values are selected during the reverse system design and are based on the need to minimize variations in return path losses for the various reverse inputs. Do not permanently alter the values of the reverse input pads without consulting a system designer.

While most system design prints should specify a design value reverse input pad for each port, the following chart provides guidelines for minimum reverse input pad values that should be installed for the High Gain and Low Gain Duals with an Auxiliary Signal Director (other than a jumper) installed in the amplifier module. Unlike previous versions of the High Gain and Low Gain Duals with plug-in signal directors, the GainMaker amplifier signal director creates loss in the forward path only. To equalize forward and reverse path losses, these minimum pad values are recommended on the associated reverse input ports.

Note: Design print values may be greater than the minimum recommended reverse input port pad values listed here.

Signal Director Tap Leg Thru Leg

Splitter 3.5 dB 3.5 dB

DC-8 8.0 dB 2.0 dB

DC-12 12.0 dB 1.5 dB



Initial Reverse Path Balancing, Continued

Important: In the GainMaker Node, the reverse input pad comes after the reverse injection point in the reverse path. Temporarily replacing the design value reverse input pad on the port being balanced with a 0 dB pad allows the reverse injection level, and the receive levels at the monitoring end, to remain constant from amplifier to amplifier, and port to port. An alternate to this method is to expect a receive level that is “x” dB lower than normal, where “x” is the value of the reverse input pad on the port being balanced, which you noted earlier in the reverse path balancing procedure.

Insert the appropriate signal amplitude from Calculate the Proper RF Signal Level into the reverse injection test point. Refer to the following diagram.

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1.5

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REVEQ0

FWDINPUT

AUX2

AUX1

MAIN

REV

REV IN-20dB

REV AUX2IN PAD

REV AUX2IN PAD

REV AMPIN -2dB

REV EQ

REVOUTPAD

FWD INPAD

750 MHz870 MHz

FWD INEQ

ACTEST

DCTEST


FWD OUT& REV INJ

-20dB

FWD

REV

FWD

FWD

HPF/EQ BODE

SWITCH

I/SPAD

MANUALBACKOFF

AGC PAD

S1

2 31

FWDAUX1OUTPAD

FWDMAINOUTPAD

SYSTRIM

AGCGAIN

FWD OUT& REV INJ

-20dB

REV IN-20dB

FWD OUT& REV INJ

-20dB

REV IN-20dB

I/S EQ

AUXSIGNAL DIR

AUX1

AUX2THERMALAGC

40 / 5242 / 5455 / 7065 / 86

REV AUX1IN PAD

REV MAININ PAD

IF AGC INSTALLED

S1 SWITCH FUNCTIONS

SET UP MODE AGCON3

THERM1

MAN2


AMP +COAX

3

AMPONLY

1

OFF

2

REVFWD INFROMRCVR

REV OUTTO XMTR

06.5

T9744

Main Reverse InjectionTest Point



Proceed to Completing Reverse Path Balancing.



Completing Reverse Path Balancing

Final Procedure Follow this procedure to complete the amplifier setup.

1. Monitor the tilt of the signals being received at the headend/hub reverse optical receiver’s RF output test point.

The tilt is the difference in signal level between the highest and lowest frequencies in the reverse passband (or between the highest and lowest frequency CW test signals).

Most systems prefer to have minimal reverse tilt (flat levels) at the headend.

To minimize tilt, alter the value of the amplifier’s reverse output equalizer.

2. Monitor the amplitude (level) of the signals being received at the headend/hub reverse optical receiver’s RF output testpoint.

Compare the received level to the reference level desired.

If using a sweep system that is “x” dB below standard CW carrier levels, be sure to consider that your receive level should also be “x” dB below the CW reference level.

To adjust the receive level to make it match the desired reference level, alter the value of the amplifier’s reverse output pad. Each 1 dB change (increase or decrease) in pad value should result in a corresponding 1 dB change (decrease or increase) in receive level.

3. Once the proper receive level and tilt of the test signals have been achieved, properly close the amplifier housing and repeat the process at the next reverse amplifier (in the downstream) cascade.

Important: Reinstall design print value reverse input pads for any port whose input pad may have been temporarily replaced with a 0 dB value pad for reverse path balancing purposes.

Work outward from the node, and outward from each external split in the coaxial plant, until all amplifiers in the cascade have been balanced.

Repeat the process for all of the reverse amplifier cascades off any remaining active node ports until all reverse amplifiers feeding into the node have been balanced.

Chapter 5 Troubleshooting

Overview

Chapter Contents This chapter contains steps you may take to troubleshoot the GainMaker Node. This chapter contains the following topic.

Topic See Page

Troubleshooting Guide 5-2

744490 Rev B Troubleshooting 5-1

Troubleshooting Guide

Overview The GainMaker Node is configured with modules that support different functions, and the modular approach provides the following benefits: • The housing design has the flexibility to accept a variety of modules. • The modules contain few user serviceable parts. This provides ease of

troubleshooting and minimal downtime during repairs.

Equipment The following equipment may be necessary to perform some troubleshooting procedures:

• Scientific-Atlanta’s fiber optic ferrule cleaner, part number 468517, to clean fiber optic connectors

• 99% alcohol and lint free wipes to clean fiber connectors

• Compressed air, also called “canned air”

• Optical power meter to measure light levels

• Proper fiber connector for optical power meter to make optical connections

• Digital voltmeter to measure voltages

• Spectrum analyzer or a field strength meter to measure RF levels

• Scientific-Atlanta’s test probe, part number 562580, to access test points


5-2 Troubleshooting 744490 Rev B

Troubleshooting Guide, Continued

No AC Power AC power can be measured at the AC test points on the AC/RF entry module, AC shunt power directors, and the power supply AC test point.

AC Test Point Locations The following diagram illustrates the AC test point locations for the GainMaker Node.

1 XMTR-20 dBRF TEST PAD

POWER ON

LASER ON

OPTICAL POWER LEVEL

RCVR

-20 dBRF TEST

POWER ON

OPTICAL POWER LEVEL

OPTICALPOWER

1

PAD

T9746

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eat

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1.5

1.5

1.51.25

REVEQ0

FWDINPUT

AUX2

AUX1

MAIN

REV

REV IN-20dB

REV AUX2IN PAD

REV AUX2IN PAD

REV AMPIN -2dB

REV EQ

REVOUTPAD

FWD INPAD

750 MHz870 MHz

FWD INEQ

ACTEST

DCTEST


FWD OUT& REV INJ

-20dB

FWD

REV

FWD

FWD

HPF/EQ BODE

SWITCH

I/SPAD

MANUALBACKOFF

AGC PAD

S1

2 31

FWDAUX1OUTPAD

FWDMAINOUTPAD

SYSTRIM

AGCGAIN

FWD OUT& REV INJ

-20dB

REV IN-20dB

FWD OUT& REV INJ

-20dB

REV IN-20dB

I/S EQ

AUXSIGNAL DIR

AUX1

AUX2THERMALAGC

40 / 5242 / 5455 / 7065 / 86

REV AUX1IN PAD

REV MAININ PAD

IF AGC INSTALLED

S1 SWITCH FUNCTIONS

SET UP MODE AGCON3

THERM1

MAN2


AMP +COAX

3

AMPONLY

1

OFF

2

REVFWD INFROMRCVR

REV OUTTO XMTR

0

AC Test Points




No AC Power Troubleshooting Table Before you begin troubleshooting for no AC power, verify that there is proper AC power input coming into the node.

Possible cause Solution

No AC at the AC test point on the AC/RF entry module.

• Check the AC source. • Check the AC shunt power director

configuration at the amplifier feeding AC to this amplifier.

AC at the AC test point but not the AC shunt power director.

• Check and/or replace the AC shunt power director.

• Check and/or replace the amplifier module.

AC at the AC test point but not the power supply test point.

• Check and/or replace the power supply wiring harness.

• Check and/or replace the power supply.




No DC Power DC power can only be measured at the DC power supply test point and power wiring harness.

DC Test Point Locations The following diagram illustrates the DC test point locations for the GainMaker Node.

1 XMTR-20 dBRF TEST PAD

POWER ON

LASER ON

OPTICAL POWER LEVEL

RCVR

-20 dBRF TEST

POWER ON

OPTICAL POWER LEVEL

OPTICALPOWER

1

PAD

T9745

Gai

nMak

er N

ode

Tran

spon

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Loca

lC

ontr

ol P

ort

Hea

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eat

Rec

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1.5

1.5

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REVEQ0

FWDINPUT

AUX2

AUX1

MAIN

REV

REV IN-20dB

REV AUX2IN PAD

REV AUX2IN PAD

REV AMPIN -2dB

REV EQ

REVOUTPAD

FWD INPAD

750 MHz870 MHz

FWD INEQ

ACTEST

DCTEST


FWD OUT& REV INJ

-20dB

FWD

REV

FWD

FWD

HPF/EQ BODE

SWITCH

I/SPAD

MANUALBACKOFF

AGC PAD

S1

2 31

FWDAUX1OUTPAD

FWDMAINOUTPAD

SYSTRIM

AGCGAIN

FWD OUT& REV INJ

-20dB

REV IN-20dB

FWD OUT& REV INJ

-20dB

REV IN-20dB

I/S EQ

AUXSIGNAL DIR

AUX1

AUX2THERMALAGC

40 / 5242 / 5455 / 7065 / 86

REV AUX1IN PAD

REV MAININ PAD

IF AGC INSTALLED

S1 SWITCH FUNCTIONS

SET UP MODE AGCON3

THERM1

MAN2


AMP +COAX

3

AMPONLY

1

OFF

2

REVFWD INFROMRCVR

REV OUTTO XMTR

0

DC Test Points




No DC Power Troubleshooting Table Before you begin troubleshooting for no DC power, verify that there is proper AC power input coming into the DC power supply.


No DC power at the power supply. • Check and/or replace the power supply.

DC at the power supply but not at the end of the wiring harness.

• Check and/or replace the power wiring harness.

• Check and/or replace the power supply.

DC at the power supply and the wiring harness but launch amplifier not working.

• Check and/or replace the launch amplifier module.




Low RF Output Follow the steps in the table below to troubleshoot low RF output of the optical receiver or launch amplifier.


Low RF input at the transmitter. • Verify correct RF input to the transmitter.

• Check the amplifiers preceding the transmitter for proper inputs and outputs.

Defective or improperly spliced optical coupler (between headend transmitter and node).

• Replace or re-splice the coupler. • Make sure all unused fiber pigtails

are terminated.

Unterminated leg of the optical coupler. • Make sure all unused fiber pigtails are terminated.

Low optical input to the GainMaker node. The optical input level should be typically 0 dBm. Refer to the system design print for the proper level.

• If connectors are dirty, clean them with ferrule cleaner (or 99% alcohol and lint-free wipes).

• Inspect fiber routing and management tray for fibers that might be wrapped too tightly.

• Check for proper optical output from transmitter.

• Check the link loss. • Replace any scratched connectors.

Unterminated leg of the optical coupler. • Make sure all unused fiber pigtails are terminated.

Failure in the optical receiver. • Replace the receiver module. Use the output test point of the optical receiver to verify output levels.

Faulty coax jumper from the node optical motherboard to the RF launch amplifier.

• Replace the jumper between the optical motherboard and the RF launch amplifier forward input.




Boot Color Table This table shows the Scientific-Atlanta standard for boot color that applies to SC connectors.

Connector Description Boot Color

Ultra Polished, UPC Blue

Angled polished, APC (standard) Green

Cleaning Optical Connectors Cleaning fiber-optic connectors can help prevent interconnect problems and therefore aid system performance. When optical connectors are disconnected and reconnected, the fiber surface can become dirty or scratched. The goal of cleaning the fiber optic connectors is to remove all dust and contaminants without leaving any residue.

To clean the optical connector, follow these steps.

1. Remove loose dirt or dust from the end of the connector by using compressed air (canned air) to blow dirt off the fiber and the connector.

2. Dampen a lint-free wipe with optical-grade (99%) isopropyl alcohol. If no wipes are available, use ferrule cleaner, part number 468517.

3. Clean the end of the connector using the lint-free wipe or ferrule cleaner.

4. Inspect the end of the connector for obvious contamination.

5. Mate the connector with an adapter or cover with an end cap.




No Forward RF Signal The forward RF signal can be measured at the –20 dB RF test point on the optical receiver and the launch amplifier module forward output test points.

No Forward RF Signal Troubleshooting Table Before you begin troubleshooting for no forward RF signal, verify that the launch amplifier is receiving the proper forward RF input signal from the optical receiver.

Important: You cannot balance the launch amplifier without the proper forward RF input signal.


No forward RF signal at the forward optical receiver test point.

• Refer to Low RF Output in previous section.

Important: You cannot balance the amplifier without the proper forward RF input signal.

There is forward RF signal at the forward optical receiver test point but no signal at one or all of the forward output test points.

• Verify that the amplifier module is receiving the proper AC and DC voltages. Refer to No AC Power and No DC Power discussed earlier in this chapter.

• Verify that all the proper accessories, pads, EQs, and signal directors (if applicable) are firmly installed in the correct locations.

• Verify that the factory installed accessories are firmly installed in the correct locations.

Note: Verifying factory installations involves removing the amplifier module cover. Reinstall the amplifier module cover properly or RF signal degradation may result. • Check/replace the wiring harness. • Change the amplifier module.




Low or Degraded Forward RF Signal The forward RF signal can be measured at the –20 dB RF test point on the optical receiver and the launch amplifier module forward output test points.

Low or Degraded Forward RF Signal Troubleshooting Table Before you begin troubleshooting for a low or degraded forward RF signal, verify that the launch amplifier is receiving the proper forward RF input signal from the optical receiver. Important: You cannot balance the amplifier without the proper forward RF input signal. Make sure you have configured the amplifier module according to the specifications in the design print and that the amplifier has warmed up for approximately 1 hour. Make sure you are using the proper tilt reference when setting levels. A 750 MHz or 870 MHz design balanced at 550 MHz requires a corrected tilt reference to compensate for the difference in carrier levels between 550 MHz and 750 MHz or 870 MHz. The tilt reference at 550 MHz is lower than the tilt reference at 750 MHz or 870 MHz. Important: If the amplifier cover was ever removed, make sure it was properly reinstalled. Improperly reinstalling the amplifier module cover may result in RF signal degradation.


There is a proper forward RF signal at the forward optical receiver test point but a low or degraded signal at one or all of the forward output test points.

• Verify that the amplifier module is receiving the proper DC voltages. Refer to No DC Power discussed earlier in this chapter.



Note: Verifying factory installations involves removing the amplifier module cover. Reinstall the amplifier module cover properly or RF signal degradation may result.

• Change the amplifier module.



Troubleshooting Guide, Continued, Continued

No Reverse RF Signal The reverse RF signal can be measured at the launch amplifier module reverse input test point and the reverse optical transmitter output test point.

No Reverse RF Signal Troubleshooting Table Before you begin troubleshooting for no reverse RF signal, verify that the amplifier is receiving the proper reverse RF input signals from the downstream amplifiers.

Important: You cannot balance the amplifier without the proper reverse RF input signals.


No reverse RF signal at the reverse input test point(s).

• Verify that the amplifier is receiving the proper reverse RF input signals from the downstream amplifiers.


There are proper reverse RF signals at the reverse input test points but no signal at the reverse transmitter output test point.

• Verify that the amplifier module is receiving the proper AC and DC voltages. Refer to No AC Power and No DC Power discussed earlier in this chapter.

• Verify that all the proper accessories, pads, and EQs are firmly installed in the correct locations.


• Verify that the reverse switch (if applicable) or its jumpers are properly and firmly installed.

Note: Verifying factory installations involves removing the amplifier module cover. Reinstall the amplifier module cover properly or RF signal degradation may result. • Check/replace the wiring harness. • Change the amplifier module.




Low or Degraded Reverse RF Signal The reverse RF signal can be measured at the launch amplifier module reverse input test point and the reverse optical transmitter output test point.

Low or Degraded Reverse RF Signal Troubleshooting Table Before you begin troubleshooting for no reverse RF signal, verify that the amplifier is receiving the proper reverse RF input signals from the downstream amplifiers.


Make sure you have configured the launch amplifier module according to the specifications in the design print and that the amplifier has warmed up for approximately 1 hour.

Make sure you are using the proper total tilt reference when setting receive levels.

Important: If the amplifier cover was ever removed, make sure it was properly reinstalled. Improperly reinstalling the amplifier module cover may result in RF signal degradation.


Low or degraded reverse RF signal at the reverse input test point(s).

• Verify that the amplifier is receiving the proper reverse RF input signals from the downstream amplifiers.






There are proper reverse RF signals at the reverse input test points but a low or degraded signal at the reverse transmitter output test point.

• Verify that the amplifier module is receiving the proper DC voltages. Refer to No DC Power discussed earlier in this chapter.



• Verify that the reverse switch and its jumpers are properly and firmly installed.

• Check/replace the wiring harness.

Note: Verifying factory installations involves removing the amplifier module cover. Reinstall the amplifier module cover properly or RF signal degradation may result.

Reverse RF signal still low or degraded. • Verify any unused RF ports are properly terminated.

• Use a spectrum analyzer to look at the reverse RF input signal spectral quality at each reverse input test point and compare it to the reverse RF output signal spectral quality.

Note: If degradation is generated by the downstream amplifier reverse RF signal, troubleshoot the RF amplifier feeding this station. • Change the launch amplifier module.




Troubleshooting Carrier-to-Noise Problems Follow the steps in the table below to troubleshoot carrier-to-noise problems.


Low optical input to the GainMaker Node. The optical input level should be typically 0 dBm. Refer to the system design print for the proper level.

• If connectors are dirty, clean them with ferrule cleaner (or 99% alcohol and lint-free wipes).

• Inspect fiber routing and management tray for fibers that might be wrapped too tightly.

• Check for proper optical output from transmitter.

• Check the link loss. • Replace any scratched connectors.

Low RF input at transmitter. • Verify RF input to the transmitter. • Check all amplifiers preceding the

transmitter for proper inputs and outputs.

Failure in optical receiver. • Replace the receiver module. Use the output test point of the optical receiver to verify output levels.

Broken SMB jumper from node optical motherboard to the RF launch amplifier.

• Replace the jumper between the optical motherboard and the RF launch amplifier forward input.

Defective or improperly spliced optical coupler (between headend transmitter and node).

• Replace or re-splice the coupler. • Make sure all unused fiber pigtails

are terminated.

Unterminated leg of optical coupler. • Make sure all unused fiber pigtails are terminated.




Miscellaneous Problems Follow the steps in the table below to troubleshoot miscellaneous problems.

Possible cause Suggestion

No RF present in network. • Check network power supply. • Verify that power is present at the

node power supply. • Check that the optical signal is

present on fiber. • Check that voltage level on the optical

receiver is the same as it was when commissioned.

• Check that output RF is present at receiver test point.

• Check that cable from interface board is connected to module and that cable has not been crushed.

Poor pictures on network. • Check RF input level at transmitter. • Check optical output of transmitter. • Check optical levels at forward

optical receiver. • Check and clean fiber connectors. • Check RF output levels at the optical

receiver. • Check RF levels at node outputs.

No RF output from headend/hub reverse optical receiver.

• Check receiver’s AC power. • Check fiber connector in

headend/hub. • Check fiber for optical input level. • Check fiber connections. • Check reverse transmitter in node.





Problem Suggestion

No RF output from headend/hub reverse optical receiver, continued.

• Check RF input level to transmitter in node.

• Check RF jumper cable from optical interface board to launch amplifier module.

• Ensure that cable is connected and not crushed.

• Check for RF at launch amplifier reverse input test point.

Excessive noise in return. • Check fiber connections and clean if necessary.

• Check noise level at transmitter test point.

• Individual ports can be isolated and return levels can be lowered by inserting higher value pads in the input pad socket.

Sweep at test point exhibits standing waves.

• Place 10 dB in-line pad in line with test instrument.

Chapter 6 Customer Information

Overview

Introduction This chapter contains information on obtaining product support and returning damaged products to Scientific-Atlanta.

In This Chapter This chapter contains the following topics.

Topic See Page

Customer Support 6-2

Return Product for Repair 6-4

744490 Rev B Customer Information 6-1

Customer Support

Obtaining Support

IF… THEN…

you have general questions about this product

contact your distributor or sales agent for product information or refer to product data sheets on www.scientificatlanta.com.

you have technical questions about this product

call the nearest Technical Service center or Scientific Atlanta office.

you have customer service questions or need a return material authorization (RMA) number

call the nearest Customer Service center or Scientific Atlanta office.

Support Telephone Numbers This table lists the Technical Support and Customer Service numbers for your area.

Region Centers Telephone and Fax Numbers

North America SciCare™ Services

Atlanta, Georgia United States

For Technical Support, call: Toll-free: 1-800-722-2009 Local: 678-277-1120 (Press 2 at the prompt)

For Customer Service or to request an RMA number, call: Toll-free: 1-800-722-2009 Local: 678-277-1120 (Press 3 at the prompt) Fax: 770-236-5477 E-mail: [email protected]

Europe, Middle East, Africa

Belgium For Technical Support, call: Telephone: 32-56-445-197 or 32-56-445-155 Fax: 32-56-445-053

For Customer Service or to request an RMA number, call: Telephone: 32-56-445-133 or 32-56-445-118 Fax: 32-56-445-051 E-mail: [email protected]

Japan Japan Telephone: 81-3-5908-2153 or +81-3-5908-2154 Fax: 81-3-5908-2155 E-mail: [email protected]

Korea Korea Telephone: 82-2-3429-8800 Fax: 82-2-3452-9748 E-mail: [email protected]

China (mainland)

China Telephone: 86-21-2401-4433 Fax: 86-21-2401-4455 E-mail: [email protected]


6-2 Customer Information 744490 Rev B

Customer Support, Continued

Region Centers Telephone and Fax Numbers

All other Asia-Pacific countries & Australia

Hong Kong Telephone: 852-2588-4746 Fax: 852-2588-3139 E-mail: [email protected]

Brazil Brazil For Technical Support, call: Telephone: 55-11-3845-9154 ext 230 Fax: 55-11-3845-2514

For Customer Service or to request an RMA number, call: Telephone: 55-11-3845-9154, ext 109 Fax: 55-11-3845-2514 E-mail: [email protected]

Mexico, Central America, Caribbean

Mexico For Technical Support, call: Telephone: 52-3515152599 Fax: 52-3515152599

For Customer Service or to request an RMA number, call: Telephone: 52-55-50-81-8425 Fax: 52-55-52-61-0893 E-mail: [email protected]

All other Latin America countries

Argentina For Technical Support, call: Telephone: 54-23-20-403340 ext 109 Fax: 54-23-20-403340 ext 103

For Customer Service or to request an RMA number, call: Telephone: 770-236-5662 Fax: 770-236-5888 E-mail: [email protected]


Return Product for Repair

Introduction You must have a return material authorization (RMA) number to return a product. Contact the nearest customer service center and follow their instructions.

Returning a product to Scientific Atlanta for repair includes the following steps: • Obtaining an RMA Number and Shipping Address • Completing the Scientific Atlanta Transmission Networks Repair Tag • Packing and Shipping the Product

Obtaining an RMA Number and Shipping Address You must have an RMA number to return products.

RMA numbers are valid for 60 days. RMA numbers older than 60 days must be revalidated by calling a customer service representative before the product is returned. You can return the product after the RMA number is revalidated. Failure to comply with the above may delay the processing of your RMA request.

Complete the following steps to obtain an RMA number and shipping address. 1 Contact a customer service representative to request a new RMA number or

revalidate an existing one. Refer to Support Telephone Numbers to find a customer service telephone number in your area.

2 Provide the following information to the customer service representative:

Your company name, contact, telephone number, email address, and fax number

Product name, model number, part number, serial number (if applicable)

Quantity of products to return

A reason for returning the product and repair disposition authority

Any service contract details 3 A purchase order number or advance payment to cover estimated charges will

be requested at the time a customer service representative issues an RMA number. Notes:

For credit card or cash in advance customers, a proforma invoice will be sent to you upon completion of product repair listing all charges incurred.

Customer service must receive a purchase order number within 15 days after you receive the proforma invoice.



Return Product for Repair, Continued

In-warranty products can accrue costs through damage or misuse, cosmetics, or if no problem is found. Products incurring costs will not be returned to you without a valid purchase order number.

4 Once an RMA number has been issued, a confirmation e-mail or fax will be sent to you detailing the RMA number, product and product quantities authorized for return, together with shipping address details and RMA terms and conditions. Note: Alternatively, you may obtain an RMA fax request form, complete and fax it to a customer service representative, or e-mail your completed request form to: [email protected].

5 Go to Completing the Scientific Atlanta Transmission Networks Repair Tag.

Completing the Scientific Atlanta Transmission Networks Repair Tag Product returned for repair, both in-warranty and out-of-warranty, should have a repair tag attached to the product detailing the failure mode. A supply of tags can be obtained free of charge by calling a customer service representative.

The Scientific Atlanta Transmission Networks repair tag provides important failure information to the Scientific Atlanta repair department. This information will reduce the amount of time needed to repair the unit and return it to you. This information can also reduce the cost of out-of-warranty repairs.

It is best to have the Scientific Atlanta Transmission Networks repair tag completed by a person knowledgeable about the failure symptoms of the unit to be returned for repair. The tag should be securely attached to the failed unit with the elastic string, tape, or another method and returned to Scientific Atlanta.




Complete the following steps to complete the Scientific Atlanta Transmission Networks repair tag. 1 Complete header information.

RMA Number: Enter the RMA number provided by the Scientific Atlanta

customer service representative. All RMA numbers start with “30” and are followed by 6 additional digits. An RMA number is required to return products to Scientific Atlanta.

If you are the technician who is filling out this tag, you may not have the RMA number. Leave it blank for now. Someone else in your organization, who has the number, can fill it in later.




Date: Enter the date the unit was removed from service. If this date is unknown, enter the date you are completing the repair tag.

Company and City: Enter the company name and city of the customer who owns the unit to be returned for repair.

SA Part # and Serial #: Enter the part number and serial number of the unit you are returning for repair. The part number and serial number can usually be found on a bar code label on the outside of the unit. If this information can’t be found leave this blank.

Product: Enter the model description of the unit you are returning for repair. For example, Model 6940/44 Node, Multimedia Tap, RF Signal Manager, etc.

2 Complete time of failure information.

This information will help the repair technician understand the failure mode. If the time to failure is unknown, leave this information blank.

3 Complete the failure description and technician information:

Failure Description: Include as much information as possible. For example: – Which feature is not working or which specification is not being met? For

example, does the problem affect audio, video, status monitoring and control, forward path, reverse path, cosmetics, all functions, etc.




– If it is a multi-port product, which port is not working or if all ports are not working?

– If the unit has degraded performance or is completely failed. – If the failure happens only at specific environmental conditions (i.e., at hot

temperature). – If the failure is intermittent or constant. – How you were powering the unit when it failed? (DC vs. AC, voltage

levels, etc.) Important: Descriptions like “bad unit”, “failed”, or “no HBO” are not specific enough to be helpful.

Technician and Phone Number: Enter the name and phone number of the technician completing the failure description information. A Scientific Atlanta representative may want to call this person to better understand the problem.

4 Attach the repair tag to the unit you are returning for repair. Use the elastic string provided, tape, or another method to securely attach the tag.

5 Go to Packing and Shipping the Product.

Packing and Shipping the Product Follow these steps to pack the product and ship it to Scientific Atlanta. 1 Are the product’s original container and packing material available?

If yes, pack the product in the container using the packing material.

If no, pack the product in a sturdy, corrugated box, and cushion it with packing material.

Important: You are responsible for delivering the returned product to Scientific Atlanta safely and undamaged. Shipments damaged due to improper packaging may be refused and returned to you at your expense. Note: PLEASE DO NOT RETURN ANY POWER CORDS, ACCESSORY CABLES, OR OTHER ACCESSORY PRODUCTS. Instructions for ordering replacement power cords, accessory cables, or other accessories can be provided by a customer service representative.

2 Write the following information on the outside of the shipping container:

RMA number

Your name

Your complete address





Your telephone number

“Attention: Factory Service” Important: The RMA number should be clearly marked on all returned product, boxes, packages, and accompanying paperwork. RMAs received by the factory service receiving department that are not clearly marked may experience delays in the processing of RMA requests. All returned product should be marked to the attention of Factory Service.

3 Ship the product to the address provided by the customer service representative in the confirmation e-mail or fax. Note: Scientific Atlanta does not accept freight collect. Be sure to prepay and insure all shipments. For both in-warranty and out-of-warranty repairs, you are responsible for paying your outbound freight expense, any applicable import and/or export duties and taxes. Scientific Atlanta will pay the return freight expense for in-warranty repairs. International Shipments: International shipments should be consigned to Scientific-Atlanta, Inc. with the notified party on the Airway Bill stated as "Expeditors International for Customs Clearance".

4 On receipt of product returned under an RMA number, a receipt notification e-mail or fax will be sent to you by Repair Receiving confirming receipt of product and quantities received. Please check the receipt notification to assure the product and quantity of product received by Scientific Atlanta matches what you shipped.

744490 Rev B Technical Information A-1

Appendix A Technical Information

Overview

Appendix Contents This appendix contains tilt, forward and reverse equalizer charts and pad values and part numbers.

Topic See Page

“Linear” Tilt Charts A-2

Forward Equalizer Charts A-4

Trim Network Response Plots A-6

Reverse Equalizer Charts A-10

GainMaker Accessory Part Numbers A-13

“Linear” Tilt Charts

Amplifier Output “Linear” Tilt Chart for 870 MHz The following chart can be used to determine the operating level at a particular frequency considering the operating linear tilt.

14

12

10

8

6

4

2

050 100 150 200 250 300 350 400 450 500 550 600 650 700 750 800 850 870

T7634 Example: If the amplifier’s 870 MHz output level is 47.5 dBmV with a linear operating tilt of 12.5 dB (from 50 to 870 MHz), the corresponding output level at 650 MHz would be 44 dBmV. This was found by taking the difference in tilt between 870 and 650 MHz (12.5 - 9 = 3.5 dB). Then subtract the difference in tilt from the operating level (47.5 - 3.5 = 44 dBmV).


A-2 Technical Information 744490 Rev B

“Linear” Tilt Charts, Continued

Amplifier Output “Linear” Tilt Chart for 750 MHz The following chart can be used to determine the operating level at a particular frequency considering the operating linear tilt.

14

12

10

8

6

4

2

050 100 150 200 250 300 350 400 450 500 550 600 650 700 750

T7635 Example: If the amplifier’s 750 MHz output level is 46 dBmV with a linear operating tilt of 12.5 dB (from 50 to 750 MHz), the corresponding output level at 550 MHz would be 42.5 dBmV. This was found by taking the difference in tilt between 750 and 550 MHz (12.5 - 9 = 3.5 dB). Then subtract the difference in tilt from the operating level (46 - 3.5 = 42.5 dBmV).



Forward Equalizer Charts

870 MHz Forward Equalizer The following table shows the 870 MHz forward equalizer loss.

EQ Value Insertion Loss at (MHz) Total Tilt

(dB) 870 750 600 550 450 300 216 108 52 (52-870 MHz)

1.5 1.0 1.1 1.3 1.3 1.5 1.7 1.8 2.0 2.2 1.2

3.0 1.0 1.2 1.6 1.7 1.9 2.3 2.6 3.0 3.3 2.3

4.5 1.0 1.4 1.9 2.0 2.4 3.0 3.4 4.1 4.5 3.5

6.0 1.0 1.5 2.1 2.4 2.9 3.7 4.2 5.1 5.7 4.7

7.5 1.0 1.6 2.4 2.7 3.3 4.4 5.0 6.1 6.9 5.9

9.0 1.0 1.7 2.7 3.1 3.8 5.0 5.8 7.1 8.1 7.1

10.5 1.0 1.8 3.0 3.4 4.3 5.7 6.6 8.1 9.2 8.2

12.0 1.0 2.0 3.3 3.7 4.7 6.4 7.5 9.2 10.4 9.4

13.5 1.0 2.1 3.6 4.1 5.2 7.0 8.3 10.2 11.6 10.6

15.0 1.0 2.2 3.8 4.4 5.6 7.7 9.1 11.2 12.8 11.8

16.5 1.0 2.3 4.1 4.8 6.1 8.4 9.9 12.2 13.9 12.9

18.0 1.0 2.5 4.4 5.1 6.6 9.1 10.7 13.3 15.1 14.1

19.5 1.0 2.6 4.7 5.5 7.0 9.7 11.5 14.3 16.3 15.3

21.0 1.0 2.7 5.0 5.8 7.5 10.4 12.3 15.3 17.5 16.5

22.5 1.0 2.8 5.3 6.1 8.0 11.1 13.1 16.3 18.6 17.6

24.0 1.0 2.9 5.6 6.5 8.4 11.7 13.9 17.3 19.8 18.8

25.5 1.0 3.1 5.8 6.8 8.9 12.4 14.7 18.4 21.0 20.0

27.0 1.0 3.2 6.1 7.2 9.4 13.1 15.5 19.4 22.2 21.2



Forward Equalizer Charts, Continued

750 MHz Forward Equalizer The following table shows the 750 MHz forward equalizer loss.


(dB) 750 600 550 450 300 216 108 52 (52-750 MHz)

1.5 1.0 1.2 1.2 1.4 1.6 1.7 2.0 2.1 1.1

3.0 1.0 1.4 1.5 1.7 2.2 2.5 3.0 3.3 2.3

4.5 1.0 1.5 1.7 2.1 2.8 3.2 3.9 4.4 3.4

6.0 1.0 1.7 2.0 2.5 3.4 4.0 4.9 5.5 4.6

7.5 1.0 1.9 2.2 2.9 4.0 4.7 5.9 6.7 5.7

9.0 1.0 2.1 2.4 3.2 4.6 5.5 6.9 7.9 6.9

10.5 1.0 2.2 2.7 3.6 5.2 6.2 7.8 9.0 8.0

12.0 1.0 2.4 2.9 4.0 5.8 7.0 8.8 10.2 9.2

13.5 1.0 2.6 3.2 4.4 6.4 7.7 9.7 11.3 10.3

15.0 1.0 2.8 3.4 4.7 7.0 8.5 10.7 12.5 11.5

16.5 1.0 2.9 3.6 5.1 7.6 9.2 11.7 13.6 12.6

18.0 1.0 3.1 3.9 5.5 8.2 10.0 12.7 14.8 13.8

19.5 1.0 3.3 4.1 5.9 8.8 10.7 13.7 15.9 14.9

21.0 1.0 3.5 4.4 6.2 9.4 11.4 14.7 17.1 16.1

22.5 1.0 3.7 4.6 6.6 10.0 12.2 15.7 18.2 17.2

24.0 1.0 3.8 4.8 7.0 10.6 12.9 16.7 19.4 18.4

25.5 1.0 4.0 5.1 7.4 11.2 13.7 17.6 20.5 19.5

27.0 1.0 4.2 5.3 7.7 11.8 14.4 18.6 21.7 20.7

Trim Network Response Plots

Introduction The following are the frequency response plots for the GainMaker System Amplifier Trim Network.

MSD-1NGF - part number 714446 Mid. Frequency Dual Peak

CH1 S 21 log MAG .5 dB/ REF 0 dB

START 5.000 000 MHz STOP 1 000.000 000 MHz

Cor

Smo

PRm

11 Jun 1999 15:31:58

1

2

3 4

5

1_:-.1116 dB

52.000 000 MHz

2_:-.8128 dB

650 MHz

3_:-2.6833 dB 750 MHz

4_:-2.6571 dB 870 MHz

5_:-2.4259 dB 950 MHz

Adjusting C1 changes the high-end frequency peak from 650 MHz to 950 MHz.

T9102

PN 714446

SYSTEM TRIM

MSD–1NGF

MADE IN MEXICO

J3L2L1 C2C1 E1 PN714448_1J2

J4J1R2 R1



Trim Network Response Plots, Continued

MSD-1NGF - part number 714446, continued Mid. Frequency Dual Peak



Cor

Smo

PRm

11 Jun 1999 15:32:24

1

2

3

4

5

1_:-.1138 dB

52.000 000 MHz

2_:-2.4377 dB

650 MHz

3_:-1.9771 dB 750 MHz

4_:-1.089 dB 870 MHz

5_:-.5814 dB 950 MHz

Adjusting C1 changes the high-end frequency peak from 650 MHz to 950 MHz.

T9102

PN 714446

SYSTEM TRIM

MSD–1NGF

MADE IN MEXICO

J3L2L1 C2C1 E1 PN714448_1J2

J4J1R2 R1







Cor

Smo

PRm

11 Jun 1999 15:32:54

1

23

4

5

1_:-.1279 dB

52.000 000 MHz

2_:-1.1374 dB

650 MHz

3_:-1.29 dB 750 MHz

4_:-.6547 dB 870 MHz

5_:-.9903 dB 950 MHz

Adjusting R2 changes the depth of the mid-band dip without changing the location

of the peaks.

T9102

PN 714446

SYSTEM TRIM

MSD–1NGF

MADE IN MEXICO

J3L2L1 C2C1 E1 PN714448_1J2

J4J1R2 R1







Cor

Smo

PRm

11 Jun 1999 15:33:14

1

2

3

4

5

1_:-.1105 dB

52.000 000 MHz

2_:-2.3013 dB

650 MHz

3_:-1.5673 dB 750 MHz

4_:-.6147 dB 870 MHz

5_:-1.8306 dB 950 MHz

Adjusting R2 changes the depth of the mid-band dip without changing the location

of the peaks.

T9102

PN 714446

SYSTEM TRIM

MSD–1NGF

MADE IN MEXICO

J3L2L1 C2C1 E1 PN714448_1J2

J4J1R2 R1



Reverse Equalizer Charts

42 MHz and 40 MHz Reverse Equalizer The following table shows the 42 MHz reverse equalizer loss.

Note: The 42 MHz reverse equalizer also works as a 40 MHz reverse equalizer in systems that use 5-40 MHz reverse amplifiers.

EQ Value

EQ Value

Insertion Loss at (MHz) Total Tilt

Total Tilt

(dB) 42 MHz

(dB) 40 MHz

42 40 35 30 25 20 15 10 5 (5-42 MHz)

(5-40 MHz)

1 1 1.0 1.0 1.1 1.1 1.2 1.3 1.4 1.5 1.7 0.7 0.7

2 2 1.0 1.0 1.1 1.3 1.4 1.6 1.8 2.0 2.3 1.3 1.3

3.1 3 0.9 1.0 1.2 1.4 1.6 1.9 2.2 2.5 3.0 2.1 2.0

4.1 4 0.9 1.0 1.3 1.6 1.9 2.2 2.6 3.0 3.6 2.7 2.6

5.1 5 0.9 1.0 1.3 1.7 2.1 2.5 3.0 3.5 4.3 3.4 3.3

6.1 6 0.9 1.0 1.4 1.8 2.3 2.8 3.4 4.1 4.9 4.0 3.9

7.2 7 0.8 1.0 1.5 2.0 2.5 3.1 3.8 4.6 5.6 4.8 4.6

8.2 8 0.8 1.0 1.5 2.1 2.7 3.4 4.2 5.1 6.2 5.4 5.2

9.2 9 0.8 1.0 1.6 2.2 2.9 3.7 4.6 5.6 6.9 6.1 5.9

10.2 10 0.8 1.0 1.7 2.4 3.2 4.0 5.0 6.1 7.5 6.7 6.5

11.3 11 0.7 1.0 1.7 2.5 3.4 4.3 5.4 6.6 8.2 7.5 7.2

12.3 12 0.7 1.0 1.8 2.7 3.6 4.6 5.8 7.1 8.9 8.2 7.9



Reverse Equalizer Charts, Continued

55 MHz Reverse Equalizer The following table shows the 55 MHz reverse equalizer loss.


(dB) 55 50 45 40 35 30 25 20 15 10 5 (5-55 MHz)

1 1 1.0 1.1 1.2 1.2 1.3 1.3 1.4 1.5 1.6 1.7 0.7

2 1 1.1 1.2 1.3 1.4 1.5 1.7 1.8 2.0 2.2 2.4 1.4

3 1 1.1 1.3 1.4 1.6 1.8 2.0 2.2 2.4 2.7 3.1 2.1

4 1 1.2 1.4 1.6 1.8 2.1 2.3 2.6 3.0 3.3 3.8 2.8

5 1 1.2 1.5 1.7 2.0 2.3 2.6 3.0 3.4 3.9 4.5 3.5

6 1 1.3 1.6 1.9 2.3 2.6 3.0 3.4 3.9 4.5 5.2 4.2

7 1 1.3 1.7 2.0 2.5 2.9 3.3 3.8 4.4 5.1 5.9 4.9

8 1 1.4 1.8 2.2 2.7 3.2 3.7 4.3 4.9 5.7 6.7 5.7

9 1 1.4 1.9 2.3 2.9 3.4 4.0 4.7 5.4 6.2 7.4 6.4

10 1 1.5 2.0 2.5 3.1 3.7 4.3 5.1 5.9 6.8 8.1 7.1

11 1 1.5 2.1 2.6 3.3 3.9 4.7 5.5 6.4 7.4 8.8 7.8

12 1 1.6 2.2 2.8 3.5 4.2 5.0 5.9 6.9 8.0 9.5 8.5



Reverse Equalizer Charts, Continued

65 MHz Reverse Equalizer The following table shows the 65 MHz reverse equalizer loss.

EQ Value

Insertion Loss at (MHz)

TotalTilt

(dB)

65

60

55

50

45

40

35

30

25

20

15

10

5

(5-65 MHz)

1 1 1.0 1.1 1.1 1.2 1.2 1.3 1.3 1.4 1.5 1.5 1.6 1.7 0.7

2 1 1.1 1.2 1.2 1.3 1.4 1.5 1.6 1.7 1.9 2.0 2.2 2.5 1.5

3 1 1.1 1.3 1.4 1.5 1.7 1.8 2.0 2.2 2.4 2.6 2.9 3.2 2.2

4 1 1.2 1.4 1.5 1.7 1.9 2.1 2.3 2.6 2.8 3.1 3.5 3.9 2.9

5 1 1.2 1.4 1.6 1.9 2.1 2.4 2.7 3.0 3.3 3.7 4.1 4.7 3.7

6 1 1.3 1.5 1.8 2.0 2.3 2.7 3.0 3.3 3.7 4.2 4.7 5.4 4.4

7 1 1.3 1.6 1.9 2.2 2.5 2.9 3.3 3.6 4.2 4.7 5.3 6.1 5.1

8 1 1.3 1.7 2.0 2.4 2.8 3.2 3.6 4.1 4.7 5.2 5.9 6.9 5.9

9 1 1.4 1.8 2.2 2.6 3.0 3.5 4.0 4.5 5.1 5.8 6.6 7.6 6.6

10 1 1.4 1.8 2.3 2.7 3.2 3.7 4.3 4.9 5.5 6.3 7.2 8.3 7.3

11 1 1.4 1.9 2.4 2.9 3.5 4.0 4.6 5.3 6.0 6.8 7.8 9.0 8.0

12 1 1.5 2.0 2.5 3.1 3.7 4.3 5.0 5.7 6.5 7.4 8.4 9.8 8.8


GainMaker Node Accessory Part Numbers

Attenuator The following table provides part numbers and pad values for the GainMaker Node attenuators.

Attenuator Pad Value Part Number

0 dB - 750/870 MHz 589693 0.5 dB - 750/870 MHz 589694 1.0 dB - 750/870 MHz 589695 1.5 dB - 750/870 MHz 589696 2.0 dB - 750/870 MHz 589697 2.5 dB - 750/870 MHz 589698 3.0 dB - 750/870 MHz 589699 3.5 dB - 750/870 MHz 589700 4.0 dB - 750/870 MHz 589701 4.5 dB - 750/870 MHz 589702 5.0 dB - 750/870 MHz 589703 5.5 dB - 750/870 MHz 589704 6.0 dB - 750/870 MHz 589705 6.5 dB - 750/870 MHz 589706 7.0 dB - 750/870 MHz 589707 7.5 dB - 750/870 MHz 589708 8.0 dB - 750/870 MHz 589709 8.5 dB - 750/870 MHz 589710 9.0 dB - 750/870 MHz 589711 9.5 dB - 750/870 MHz 589712

10.0 dB - 750/870 MHz 589713 10.5 dB - 750/870 MHz 589714 11.0 dB - 750/870 MHz 589715


GainMaker Node Accessory Part Numbers, Continued

11.5 dB - 750/870 MHz 589716 12.0 dB - 750/870 MHz 589717 12.5 dB - 750/870 MHz 589718 13.0 dB - 750/870 MHz 589719 13.5 dB - 750/870 MHz 589720 14.0 dB - 750/870 MHz 589721 14.5 dB - 750/870 MHz 589722 15.0 dB - 750/870 MHz 589723 15.5 dB - 750/870 MHz 589724 16.0 dB - 750/870 MHz 589725 16.5 dB - 750/870 MHz 589726 17.0 dB - 750/870 MHz 589727 17.5 dB - 750/870 MHz 589728 18.0 dB - 750/870 MHz 589729 18.5 dB - 750/870 MHz 589730 19.0 dB - 750/870 MHz 589731 19.5 dB - 750/870 MHz 589732 20.0 dB - 750/870 MHz 589733 20.5 dB - 750/870 MHz 589734

750/870 MHz Forward Equalizers The following table provides part number and pad values for the GainMaker Node 750/870 MHz forward equalizers.

Value 870 MHz Forward EQ 750 MHz Forward EQ 0 dB 589260 589260

1.5 dB 589261 589306

3.0 dB 589262 589307

4.5 dB 589263 589308

6.0 dB 589264 589309

7.5 dB 589265 589310




9.0 dB 589266 589311

10.5 dB 589267 589312

12.0 dB 589268 589313

13.5 dB 589269 589314

15.0 dB 589270 589315

16.5 dB 589271 589316

18.0 dB 589272 589317

19.5 dB 589273 589318

21.0 dB 589274 589319

22.5 dB 589275 589320

24.0 dB 589276 589321

25.5 dB 589277 589322

27.0 dB 589278 589323

750/870 MHz Inverse Equalizers The following table shows the part number and pad values for the GainMaker Node 750/870 MHz forward equalizers.

Inverse EQ Part Number

1.4/1.5 dB - 750/870 MHz 589325 2.9/3.0 dB - 750/870 MHz 589326 4.2/4.5 dB - 750/870 MHz 589327 5.5/6.0 dB - 750/870 MHz 589328 6.9/7.5 dB - 750/870 MHz 589329 8.4/9.0 dB - 750/870 MHz 589330

9.8/10.5 dB - 750/870 MHz 589331 11.1/12.0 dB - 750/870 MHz 589332 12.6/13.5 dB - 750/870 MHz 589333 13.8/15.0 dB - 750/870 MHz 589334




Reverse Equalizers The following table shows the part number and pad values for the GainMaker Node reverse equalizers.

Value 40/42 MHz 55 MHz 65 MHz

0 dB 712719 712719 712719 1 dB 589628 712679 589736 2 dB 589629 712680 589737 3 dB 589630 712681 589738 4 dB 589631 712682 589739 5 dB 589632 712683 589740 6 dB 589633 712684 589741 7 dB 589634 712685 589742 8 dB 589635 712686 589743 9 dB 589636 712687 589744

10 dB 589637 712688 589745 11 dB 589638 712689 589746 12 dB 589639 712690 589747

Plug-in Pads The following chart provides part numbers and pad values for the GainMaker Node plug-in pads.

Plug-in Pad Value Part Number

0 dB 279500 0.5 dB 565231 1.0 dB 279501 1.5 dB 565232 2.0 dB 279502 2.5 dB 565233 3.0 dB 279503 3.5 dB 565234 4.0 dB 279504 4.5 dB 565235 5.0 dB 279505




5.5 dB 565236 6.0 dB 279506 6.5 dB 565237 7.0 dB 279507 7.5 dB 565238 8.0 dB 279507 8.5 dB 565239 9.0 dB 279508 9.5 dB 565240

10.0 dB 279510 10.5 dB 565241 11.0 dB 279511 11.5 dB 565242 12.0 dB 279512 12.5 dB 565243 13.0 dB 279513 13.5 dB 565244 14.0 dB 504151 14.5 dB 565245 15.0 dB 504152 15.5 dB 565246 16.0 dB 504153 16.5 dB 565247 17.0 dB 504154 17.5 dB 565248 18.0 dB 504155 18.5 dB 565249 19.0 dB 504156 19.5 dB 565250 20.0 dB 504157 20.5 dB 565251 75 Ohm 279524

Glossary

Term, Acronym, Abbreviation

Meaning

A Ampere (amp) is the unit of measure for electrical current.

AC Alternating current

AC/RF Alternating current radio frequency

Adapter The terminal installed for reception of services.

Addressable The ability to control an individual unit in a system of many similar units.

AFC Automatic frequency control

AGC Automatic Gain Control

ALT Alternate

AMPL Amplitude

Amplifier Cascade Two or more amplifiers in a series, the output of one feeding the input of another.

Assy. Assembly

ATC Automotive fuse

ATP Accepted test plan

Attenuation A decrease in signal magnitude occurring in transmission from one point to another or in passing through a loss medium.

Attenuator Plug-in pad. It is a device designed to reduce signal strength by an amount specified in dB.

ATX Addressable transmitter

AUX Auxiliary

Baseband The original frequency span of a signal before it is modified for transmission or otherwise manipulated.

Baud (Bd) The number of times a state change occurs per second on a communications channel.


744490 Rev B Glossary-1

Glossary, Continued

Beamwidth The included angle between two rays (usually the half-power points) on the radiation pattern, which includes the maximum lobe, of an antenna.

BER Bit error rate

BERT Bit error rate test

BIOS Basic Input/Output System

BIST Built-in self-test

Bit Short for Binary Digit. Can be either a "one" or a "zero".

Blanking level The amplitude of the front and back porches of the composite video signal.

BNC A coaxial connector that uses a bayonet type attachment to secure the cable. It is also known as Baby “N” connector.

BPF Bandpass filter

Bps Bits per second - The total number of bits sent in a second of time.

BPSK Binary phase-shift keying

BW Bandwidth

CCW Counterclockwise

CF Continuous feed

CGI Common Gateway Interface

Circuit switching The type of signal switching traditionally used by telephone companies to create a physical connection between a caller and a called party.

CIRD Commercial Integrated Receiver Decoder

CISC Complex Instruction Set Computer - A computer that uses many different types of instructions to conduct its operations, i.e., IBM PCs, Apple Macintoshs, IBM 370 mainframes.


Glossary-2 744490 Rev B

Glossary, Continued

CIU Customer Interface Unit

C/N or CNR Carrier-to-noise ratio

Compression The non-linear change of gain at one level of a signal with respect to the change of gain at another level for the same signal. Also, the elimination of redundant information from an audio, data, or video signal to reduce transmission requirements.

CSO Composite second order

C/T Carrier-to-noise temperature ratio

CW Continuous wave

dB Decibel

dBc Decibels of gain relative to a reference carrier

dBm Decibels relative to 1 milliwatt

dBi Decibels of gain relative to an isotropic radiator

dBuV Decibels relative to 1 microvolt

dBW Decibels relative to 1 watt

dBmV Decibels relative to 1 millivolt

DC Direct Current

DC Directional coupler

DES Data Encryption Standard

Deviation The peak difference between the instantaneous frequency of the modulated wave and the carrier frequency, in an FM system.

Differential gain The difference in amplification of a signal (superimposed on a carrier) between two different levels of carrier.



Glossary, Continued

Diplex filter A filter which divides the frequency spectrum into a high frequency segment and a low frequency segment so that two different signals can be sent down the same transmission path.

Distribution The activities associated with the movement of material, usually finished products or service parts, from the manufacturer to the customer.

Distribution System Part of a cable system consisting of trunk and feeder cables used to carry signals from headend to subscriber terminals.

Downconverter A device that converts an input signal to a lower frequency output signal.

Down link A transmission path carrying information from a satellite or spacecraft to earth.

DP Data processing

DPU Digital processing unit

DSP Digital signal processor

DSR Digital Storage and Retrieval System

D to U Desired to Undesired signal ratio

DTMF Dual Tone Multiple Frequency

Duplexer A device which permits the connection of both a receiver and a transmitter to a common antenna.

DVB Digital voltmeter

EC The European Community

ECM Entitlement Control Message

EEPROM Electrically Erasable Programmable Read-Only Memory

Emission designer An FCC or CCIR code that defines the format of radiation from a transmitter.

EPROM Erasable Programmable Read-Only Memory

EQ Equalizer



Glossary, Continued

Equalization The process of compensating for an undesired result. For example, equalizing tilt in a distribution system.

ERP Effective radiated power

Ext External

FAOC Frequency agile output converters

FET Field-effect transistor

FITT Forward Intermediate Terminating Trunk

FM Frequency modulation

Forward Signal direction from the headend to the set-top terminal.

Frequency The number of similar shapes in a unit of time. For example, the number of sine waves moving past a fixed point in a second.

Frequency Agile The ability to change from one frequency to another without changing components.

Frequency Modulation A system of modulation where the instantaneous radio frequency of the carrier varies in proportion to the instantaneous amplitude of the modulating signal while the amplitude of the radio frequency carrier is independent of the amplitude of the modulating signal.

Frequency Response The effect that changing the frequency has on the magnitude of a signal.

Frequency Reuse A technique in which independent information is transmitted on orthogonal polarizations to "reuse" a given band of frequencies.

Frequency Stability A measure of the departure from nominal frequency value of a signal, with respect to time, temperature, or other influence.

FSM Field strength meter

FSK Frequency-shift keying

FTP File Transfer Protocol

GaAs FET Gallium arsenide field-effect transistor



Glossary, Continued

Gain An increase in signal relative to a reference.

HGBD High Gain Balanced Triple

HGD High Gain Dual

HGD RC High Gain Dual Reverse Conditioner

Hertz A unit of frequency equal to one cycle per second.

Hetrodyne Changing the frequency of a signal by mixing it with another signal to get the sum and difference of the two.

I/O Input/output

IC Integrated circuit

ICP Internal Control Program – A series of policies to protect company sensitive and export controlled information.

IDR Intermediate Data Rate

IEC International Electrotechnical Commission

IF Intermediate frequency

IFL Interfacility link

K Kelvin is a measure of temperature. Zero K equals –273 degrees Centigrade or –459 degrees Fahrenheit.

KB KiloByte

ft-lb Foot-pound

in-lb Inch-pound

LE Line extender

LEI, LEII, LEIII Line Extender I, Line Extender II, Line Extender III

LED Light-emitting diode

LGD Low Gain Dual

LIFO Last-in, first-out



Glossary, Continued

LNC Low-noise converter

Mbps Megabits per second

Multipath (multipath transmission)

The phenomenon which results from a signal traveling from point to point by more than one path so that several copies of the signal arrive at the destination at different times or at different angles.

N/C Not connected

Nanosecond 1 thousandth of a microsecond

Nm Newton meter

NIU Network Interface Unit

OEM Original equipment manufacturer

OOB Out of band

PA Power amplifier

PCB Printed circuit board

PCM Pulse code modulation

PDI Pressure Differential Indicator

PLL Phase-lock loop It is an electronic servo system controlling an oscillator to maintain a constant phase angle relative to a reference signal.

PROM Programmable Read Only Memory

PVC Poly vinyl chloride

PWB Printed wiring board

PWR Power



Glossary, Continued

QAM Quadrature amplitude modulation A frequency modulation technique used by digital video channels to deliver digital broadcast and interactive services over noisy bands in the RF spectrum.

QPR Quadrature partial response

QPSK Quadrature phase-shift keying

RC Reverse conditioner

RCVR Receiver

Reverse or return Signal flow direction toward the headend.

RF Radio frequency

RF Bypass A bypass feature that allows subscribers to view a clear analog channel while recording a digital or analog channel on a VCR.

RFI Radio frequency interface

RMA Return material authorization

RMS Root mean square

Router A device which examines a packet and routes the packet to an output port appropriate to the packet destination.

RS Reed-Solomon (coding) Remote sensing

RX Receive

SA Spectrum analyzer System amplifier

SAI, SAII, SAIII System Amplifier I, System Amplifier II, System Amplifier III

SAM Signal analysis meter

SET Secure electronic transaction



Glossary, Continued

Scattering Random directional change of a wave or part of a wave caused by an irregular reflecting surface or by passing through an inhomogeneous transmission medium.

SM Status monitor

SMC Status monitoring and control

SMIU Status Monitor Interface Unit

SMU Server Management Unit

S/N or SNR Signal-to-noise ratio

SNMP Simple Network Management Protocol

Splitter A device which divides power from an input to deliver multiple outputs or combines multiple inputs into one output.

Spread Spectrum A modulation technique to spread a narrow band signal over a wide band of frequencies.

Spurious Anything other than the desired result

SSPA Solid-state power amplifier

Sweep generator A signal source which can automatically vary its frequency continuously from one frequency to another.

Synchronous transmission

A method of sending information over a path and separating discrete characters and symbols by a precise separation in time.

Torque Force applied to bolt or screw to tighten the device.

TTCN True tilt correction network

TX Transmit

UBT Unbalanced Triple

UBT RC Unbalanced Triple Reverse Conditioner

UPS Uninterruptible power supply




Glossary, Continued

UTP Unshielded twisted pair

uV Microvolt One millionth of a volt

V Volt

V AC Volts alternating current

V DC Volts direct current

VBR Variable bit rate

W Watts

Index

A AC power troubleshooting, 5-2 AC shunt power directors, 1-4, 2-34 accessories

customer installable, 1-6 illustration, 1-8, 1-9 installing, 2-19 miscellaneous, 1-7 part numbers, A-13

adjusting received amplitude, 4-42, 4-48 AGC

aligning, 4-19, 4-27 operational mode, 4-4, 4-5 pad value, 4-19, 4-26 selecting pad value, 4-19, 4-26 setup, 4-18, 4-25 Switch 1 positions, 4-4, 4-5

amplifier AC shunt power directors, 1-4 accessories, 1-6 balancing, 4-1, 4-2 bandwidth, 1-2 block diagrams, 1-10, 1-11 characteristics, 1-2 configuration, 1-4 configuring, 2-1, 2-21 customer installable accessories, 1-6 illustrations, 1-8, 1-9 input port, 1-3 input signal, 3-8 installing, 2-1, 2-30 miscellaneous accessories, 1-7 module cover, 3-3

output ports, 1-3 power supply, 1-3 reverse path splits, 1-2 test points, 1-4 types of, 1-2

amplifier and coax compensation mode, 3-6, 3-7, 3-11, 3-33

amplifier only compensation mode, 4-6, 4-7, 4-11, 4-29

attaching connectors, 2-11, 2-13, 2-15 attenuator pads, 2-23, A-13 automatic gain control. See AGC

B balancing

forward path, 4-11 forward path for AGC stations, 4-12, 4-

22 introduction, 4-1 preparing for, 4-2 procedures, 4-40 reverse fiber, 4-38 reverse path, 4-36, 4-43

bandwidth, 1-2 block diagrams

High Gain Balanced Triple, 1-10 High Gain Dual, 1-11

bode network, 4-4, 4-6

C calculate

AGC pad value, 4-19, 4-26 RF signal level, 4-43


744490 Rev B Index-1

Index, Continued

center conductor trim length, 2-16 characteristics of

amplifier, 1-2 power supply, 1-3

charts "linear" tilt, A-2 forward equalizer, A-4 manual backoff, 4-14 reverse equalizer, A-11

closing the housing, 2-6 closure bolts, tightening, 2-5 connecting coaxial cable, 2-17 connectors, attaching, 2-13 cover, 3-3 crowbar surge protector, 2-25 customer installable accessories, 1-6

D DC

power troubleshooting, 5-6 test locations, 5-5

degraded forward RF signal troubleshooting, 5-10

degraded reverse RF signal troubleshooting, 5-12

determining output tilt, 4-15, 4-23, 4-30, 4-34 diplex filters, 1-4 dimensions of the housing, 2-8

E equalizer charts

forward, A-4 reverse, A-11

equalizers, 2-22 F features of

amplifier, 1-2 power supply, 1-3

final setup procedure, 4-47 fiber connectors, 2-11 fiber optic service cable, 2-11 forward data carrier, 4-43 forward equalizer

charts, A-4-A-5 part numbers, A-14

forward interstage equalizer, 1-4 forward interstage pads, 1-4 forward path balancing

AGC manual mode, 4-12 AGC stations, 4-12 AGC thermal mode, 4-22 procedure table, 4-11 thermal stations, 4-11 thermal stations using amplifier only

compensation mode, 4-29 using trim networks, 4-33

forward RF signal troubleshooting, 5-9

G GainMaker Node

AC shunt power directors, 1-4, 2-34 accessories, 1-6, 1-8, 1-9, 2-3, A-13 amplifier, 1-2, 3-4 balancing, 4-1, 4-2 bandwidth, 1-2 block diagrams, 1-10, 1-11 characteristics, 1-2 configuration, 1-3 customer installable accessories, 1-6 description of, 1-2 diplex filters, 1-4 field installable accessories, 1-7


Index-2 744490 Rev B

Index, Continued

forward interstage equalizer, 1-4 forward interstage pad, 1-4 High Gain Balanced Triple, 1-3 High Gain Dual, 1-3 illustrations, 1-8 input port, 1-3 installing a trim network, 4-40 introducing, 1-1 miscellaneous accessories, 1-7 ordering matrix, 1-5 output attenuator pads, 1-4 output port, 1-3 power supply, 1-3 reverse amplifier, 1-4 reverse path splits, 1-2 test points, 1-4, 1-8 trim network response plots, A-6–A-10 types of, 1-2, 1-5

generating test signals, 4-39

H handling fiber cable, 2-10 High Gain Balanced Triple, 1-3, 1-9 High Gain Dual, 1-3, 1-8 housing

attaching, 2-15 attaching connectors, 2-13 base, 2-9 closing, 2-6 compatibility, 2-9 connecting coaxial cable, 2-16 dimesnions, 2-8 installation instructions, 2-5 installing, 2-2

installing the amplifier, 2-34 lid, 2-9 locking screw, 3-3 measurements, 2-4 opening, 2-5 pedestal mounting, 2-20 strand mounting, 2-17 torque sequence, 2-35 trimming center conductor, 2-15 upgrading housing lid, 3-2

I illustrations

accessories, 1-8, 1-9 AGC, 3-18, 3-26 attenuator pads, 2-23 equalizers, 2-23 High Gain Balanced Triple, 1-10 High Gain Dual, 1-11 housing lid, 2-7 switch 1, 3-12 test points, 1-8

injection of test signals, 4-42 input port, 1-3 input signal level, 4-8 installing

AC shunt power directors, 2-17 accessories, 2-22 amplifier, 2-31 amplifier module, 2-34 attenuator pads, 2-23 fiber connectors, 2-14 forward equalizers, 2-24 housing, 2-2


744490 Rev A Index-3

Index, Continued

housing in a pedestal, 2-20 housing on a strand, 2-17 inverse equalizers, 2-22, A-15 optical modules, 2-38 power supply, 2-9 reverse equalizers, 2-24 signal director, 2-27 status monitor, 2-43 surge protector, 2-25 trim network, 4-40 upgrade kit, 3-2

inverse equalizer, 2-24

L "linear" tilt charts

750 MHz, A-3 870 MHz, A-2

low forward RF signal troubleshooting, 5-9 low reverse RF signal troubleshooting, 5-11

M manual backoff chart, 4-14 manual backoff level, 4-12 manual setup mode, 4-4, 4-5, 4-11 measurements, 2-4 module cover, 2-3 monitoring received amplitude, 4-42 monitoring test signals, 4-43 multiple CW signal generator, 4-43

O opening the housing, 2-5 ordering matrix, 1-5 output attentuator pads, 1-3 output level, 4-16, 4-24, 4-31, 4-36, 4-37 output ports, 1-3 output tilt, 4-15, 4-23, 4-24, 4-30, 4-31, 4-34,

4-35

P pedestal mounting, 2-20 plots

trim network response, A-6–A-10 plug-in pads, A-16–17 plug-in signal director, 2-30 power supply characteristics, 1-3 proper RF signal level, 4-44 R Reinstalling

fiber tray, 2-15 optical receiver, 2-38 optical transmitter, 2-40

removing AC shunt power directors, 2-34 fiber tray, 2-13 optical reciever, 2-41 optical transmitter, 2-35 status monitor, 2-40

reverse equalizer, 2-24 reverse equalizer charts

40 MHz, A-10 42 MHz, A-10 55 MHz, A-11 65 MHz, A-12

reverse fiber link balancing, 4-38 balancing, 4-40 generating test signals, 4-39 injection of test signals, 4-38 received amplitude, 4-38

reverse path balancing balancing, 4-36 completing, 4-36 generating test signals, 4-37 initial, 4-43 injection of test signals, 4-36 monitoring, 3-42 received amplitude, 4-36 reverse path splits, 1-2


Index-4 744490 Rev B

Index, Continued

reverse RF signal troubleshooting, 5-7, 5-11

reverse sweep receiver, 4-39 reverse sweep transmitter, 4-39 RF signal level, 4-43 routing cables, 3-7

S setting

AGC, 4-18, 4-25 manual backoff level, 4-12 output level, 4-16, 4-24, 4-31 output tilt, 4-15, 4-24, 4-31

signal director, 2-27 signal flow, 2-15 signal level meter, 4-39 size, 2-4 spectrum analyzer, 4-39 stowing fiber tray, 2-15 strand mounting, 2-15 surge protector, 2-25 Switch 1

AGC stations, 4-5 introduction, 4-4 position for AGC stations, 4-4 position for thermal stations, 4-6, 4-7

T technical information, A-1 test equipment, 5-2 test points, 1-4, 1-8 testing input signal levels, 4-8 thermal setup mode, 4-4, 4-5, 4-11 thermal station Switch 1 positions, 4-7 tightening the closure bolts, 2-35 tilt charts, "linear", A-2

tools, required, 2-3, 3-1 torque specifications, 2-4 torquing sequence, 2-35 trim network

forward path balancing using, 3-33 illustrations, 3-33 installing in a GainMaker System

Amplifier, 3-34 response plots, A-6–A-9 setting output level, 3-33

trimming the center conductor, 2-16 troubleshooting

AC, 5-3 DC, 5-5 degraded forward RF signal, 5-10 degraded reverse RF signal, 5-12 equipment, 5-2 forward RF signal, 5-9 low forward RF signal, 5-10 low reverse RF signal, 5-12 reverse RF signal, 5-12

U upgrading

amplifier cover, 3-4 housing lid, 3-2

unstowing fiber tray, 2-13

W weight specfication, 2-4

744490 Rev A Index-5

Scientific Atlanta, A Cisco Company 5030 Sugarloaf Parkway, Box 465447 Lawrenceville, GA 30042

678-277-1000 www.scientificatlanta.com

This document includes various trademarks of Cisco Systems, Inc. Please see the Notices section of this document for a list of Cisco Systems, Inc., trademarks used in this document. Product and service availability are subject to change without notice.

© 2001, 2008 Cisco Systems, Inc. All rights reserved. September 2008 Printed in United States of America

Part Number 744490 Rev B

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