Umts Tma Nov 2008

Tower Mounted Amplifier Product Line

DTMA Installation Instructions(P71, P72 & P91 Products)

Document number S05 J00 009 Rev. CEdition dated 10.01.2008 - ENGLISH

Installation Guide

INDEX

1. INTRODUCTION ________________________________________________________ 3 1.1. Purpose and intended users of this manual ____________________________ 3 1.2. Scope ____________________________________________________________ 3 1.3. Glossary _________________________________________________________ 3 1.4. Operators safety __________________________________________________ 4

2. GENERAL DESCRIPTION _________________________________________________ 7 2.1. UNIT identification _________________________________________________ 7 2.2. Tower Mounted Amplifier - General description ________________________ 7 2.3. TMA installation kit ________________________________________________ 9

3. INSTALLATION ________________________________________________________ 10 3.1. Programme of installation operations _______________________________ 10 3.2. Tools and Accessories _____________________________________________ 11 3.3. Pole-mounted TMA installation _____________________________________ 11 3.4. Wall-mounting operations _________________________________________ 15 3.5. Connections _____________________________________________________ 16 4. AISG – TYPICAL SITE CONFIGURATIONS __________________________________ 18

5. OPERATING TEST AND MAINTENANCE ___________________________________ 19 5.1.Visual inspection __________________________________________________ 19 5.2.Operating test ____________________________________________________ 19 5.3.Routine Maintenance _______________________________________________ 19 5.4.Types of failures and suggested solutions ______________________________ 20

6. TECHNICAL SUPPORT __________________________________________________ 20

Tower Mounted Amplifier Product Line Installation

DTMA Installation Instructions CommScope Proprietary 1

1. INTRODUCTION

1.1. Purpose and intended users of this manual

Purpose

This document is designed to describe the installation procedure for the Dual Tower Mounted Amplifier from Andrew Corporation, covering all the major frequency bands and applications.

Intended users

The manual is designed for installation technicians with adequate and specific expertise to perform the installation.

1.2. Scope The installation instructions provided in this manual refer to tower-mounted and wall-mounted

solutions for the TMA product line. The tower-mounted solution adopted and described in this manual refers to “band clamp” pole mounting kit only.

1.3. Glossary

ABBREVIATION MEANING

DTMA Dual Tower Mounted Amplifier ESD Electro Static Discharge MS Mobile Station PDU Power Distribution Unit TMA Tower Mounted Amplifier Tx Transmit Rx Receive


CommScope Proprietary DTMA Installation Instructions 2

1.4. Operators Safety

All operations for the connection of the TMA unit to the base station must be executed in compliance with the safety instructions provided with the base station.

1.4.1. High Frequency

The base station contains equipment that generates high frequency magnetic fields when in operation. The relative warnings described below must be followed.

P002644AHigh frequency hazard symbol

WARNINGHIGH FREQUENCY MAGNETIC FIELDS

The transmitter antenna and the equipment connected directly to the antenna generate high frequency magnetic fields when in operation. The high density energy can damage the eyes and certain tissues of the human body in persons exposed to radiation near the antenna.

The Station must be shut down when work is performed on the transmitter antenna. Avoid remaining in the immediate vicinity of the antenna when the Station is in operation.

1.4.2. ESD (Electro Static Discharge)

An electrostatic discharge on a component at a voltage exceeding 600 volts is sufficient to damage the component, even if mounted on a board.

P002646AESD hazard symbol

All electronic components used in base stations are subject to ESD.

Electrostatic discharges at voltage ratings below 4000 volts are not normally detected or perceived in any other form by the person causing the actual discharges.

For example, the natural movements of a person wearing synthetic clothing may generate electrostatic voltages exceeding 10 000 V !

Components are damaged by an electrical break in the ultra-thin insulating layer in the integrated circuits (measuring typically 0.0001 mm). The damage may be serious and cause the immediate function failure or remain latent and occur later.



WARNINGELECTRO STATIC DISCHARGES

We recommend you wear the anti--static bracelet connected to ground via a protective resistance to avoid damaging circuits when handling printed circuits. Electronic boards must be stored in anti-static envelopes or inside packages both during transportation and when in storage.

1.4.3. High voltage

The base station contains equipment that generates high voltages when in operation. The relative warnings shown below must be observed.

P002645AHigh voltage shock hazard symbol

The warnings and precautions established by local applicable standards must be observed.



WARNINGHIGH VOLTAGE

Installation of all power supply cables and units must be performed by authorised personnel.

Only authorized personnel, with adequate technical training and expertise on base stations shall be permitted to operate on the various units. Opening of enclosed units is not allowed.



2. GENERAL DESCRIPTION

2.1. UNIT Identification

Each unit is provided with a label that identify the Part Number, Revision Number and Serial Number relevant to the unit. For any compliance, reference should be done to such numbers

Figure 1 – Label description

2.2. Tower Mounted Amplifier - General description

The main feature of the TMA is to filter and amplify the incoming RX signal, transmitted by the Mobile Station (MS) before the signal is transmitted to the Radio Base Station via the feeder cable. The TX signal is filtered but not amplified. The Dual TMA unit is made up of two completely independent Low Noise Amplifiers. In case of failure of one of them the other can continue to provide service. When both amplifiers are out of order, the complete system shall be changed or repaired. This TMA is not field repairable.

Figure 2 – View of DTMA unit



The TMA must be mounted on a tower or wall, as close as possible to the antenna to achieve the best system performance.

Figure 3 – DTMA block diagram



2.3. TMA installation kit

The TMA can be installed in two different ways, on a tower or on a wall. The TMA is normally supplied with the installation kit / brackets which are suitable for both types of installation.

Figure 4 - Parts of the TMA installation kit

Figure 5 – Intermediate Assembly

Figure 6 - Assembled installation kit

Screw buckles (2)

Screw Bands (2)

Screw Band

Holes for wall mounting



3. INSTALLATION

3.1. Programme of installation operations

Figure 7 - Programme of installation operations

START

SHUT DOWN THE CELL

FIX THE TMA TO THE TOWER OR TO THE WALL

CONNECT FEEDERS (and RET CABLES WHERE REQUIRED)

VISUAL INSPECTION

OK ? ELIMINARE IL PROBLEMA OK ? SOLVE THE PROBLEM

ENERGISE THE CELL

FUNCTIONAL TEST

OK ? SOLVE THE PROBLEM NO

NO

YES

YES

END



3.2. Tools and Accessories

Figure 8 - Tools needed to install the TMA unit

3.3. Pole-mounted TMA installation

NOTE: The TMA should be mounted as close as possible to the antenna to ensure best system performance.

1. Slotted 10 x 200 screwdriver

2. Torque wrench

3. Fischer 8/10 mm (for wall mounting only).

4. Sealing tape for connectors

5. Cable with M8 eyelet for TMA grounding

1 2

3

45

Insert the screw band into the mounting bracket as per fig-ure.

1



Push the screw part of the buckle towards the screw band to provide preliminary seating of the screw.

Tighten the screw within the buckle using the screwdriver (tool N° 4 par. 3.2) until the TMA is strongly fixed to the pole.

Warning: a small torque value could cause the TMA to move around the pole but too high a torque value could cause the screw band to deform.

The recommended torque value is 3 to 3.5 Nm max.

Repeat these instructions for the second screw band.

2

Position the TMA close to the pole and near to the antenna.

Please be sure that the ANT Port faces upwards.

Put the screw band around the pole and insert one terminal side of the screw band into the right slot on the screw buckle according to the picture

(see chapter 3.3.1. for more detailed instructions)

3Put the other terminal side of the screw band on the external slot (under the screw) of the screw buckle.

4



3.3.1. Screw band mounting instruction - detail

1

Screw band mounting sketch.

2

Insert one terminal of the band into the lower slot of the buckle.

3Insert the other terminal of the band into the upper slot of the buckle.



4

Rotate the screw towards the band while pressing.

5

Tighten the screw along the band up to the required strength (max 5 Nm) by means of a screwdriver.

6

Screw bands final mounting position.



3.4. Wall-mounting operations

1

Position the TMA against the wall at the point where the unit is to be installed.

Check the alignment using a spirit level if required.

2

Drill the holes in the wall. The diameter of the holes must be sized to the wall anchors to be used: for reinforced concrete or hollow bricks, etc.

3Insert the “Fischer” (*) into the wall and secure the TMA.

(*) The fixings shall be chosen according to the wall and to the weight of the unit. Typical values are 6 to 8 mm (1.4” to 5/16”) diameter screws (NOT included within the installation kit)

Holes for “wall mounting”



3.5. Connections

1Connect the grounding cable to an eyelet terminal with a diameter suitable for an M8 screw.The grounding cable is connected to the TMA by assembling the following components in the order shown: - flat washer - eyelet terminal - flat washer - split washer - nut

2

Tighten the grounding nut and connect the other end of the cable to an efficient grounding point.

3

Connect the RF cables to the TMA. There is no priority sequence for the connection of the cables. It is possible to connect the antenna cable and then the Node B cable and vice versa.

splitwasher

nut

flat washer

eyelet terminal



4Tighten the RF connectors to the TMA with a torque wrench. Set the maximum torque value recommended by the supplier of the 7/16” male connector.

In the case where there is no detailed instruction from the connector manufacturer the recommended torque value is 25 – 30 Nm.

5Seal the connector end with the sealing tape to avoid risk of water entering the connector.

Position the antenna cable in a way to avoid water running along the cable towards the connector end (drip loop).



4. AISG – TYPICAL SITE CONFIGURATIONS



5. OPERATING TEST AND MAINTENANCE

5.1. Visual inspection

We recommend a visual inspection of the unit before supplying power to the equipment to avoid undesirable damage to the equipment due to mistakes made during the installation operations.

Check that:

1 - installation has been executed in compliance with the instructions.

2 - All the connectors to the TMA, to the antenna and to the base station panel have been correctly connected and tightened.

3 - Record the observations concerning possible installation mistakes identified and trans-

mit the observations to the personnel in charge of installation.

5.2. Operating test

Switch the main power switch to “on” and supply power to the system. Verify there is no alarm sig-nal on the base station.

5.3. Routine Maintenance

The TMA equipment does not require routine maintenance.



5.4. Types of failures and suggested solutions

This paragraph lists possible failures and the actions to be taken to remedy the situation. The TMA unit is not equipped with LEDs or other alarm systems, therefore the detection of a mal function is provided via the equipment connected to the TMA unit (i.e. PDU) located inside the Base Station panel.

6. TECHNICAL SUPPORT

Please contact your local Andrew representative or dealer for technical support.

Failure type and description: Suggested action

Normal operation. No action required

Deterioration. The fault is caused by the malfunction of one of the two amplifiers in the DTMA unit.

It is not necessary to intervene immediately since the cell is still operating, but the DTMA unit must be replaced as soon as possible.

System failure Both amplifiers of the DTMA unit have failed. This means that the cell is out of service.

Replace the faulty DTMA.

Failure of the 12 VDC power supply (from the PDU).

Disconnect the RF cable from the TMA, which originates from the base station. Reconnect the cable after approximately 30 seconds and verify that the power supply has been restored. Replace the power supply unit if the fault persists.

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