MAN-22412-US001 C00 SSMTT-33 Optical Test Toolkit User Manual MMD

1Optical Test Toolkit Module

Optical Test Toolkit Module

for the MTT and xDSL

Family of Products

MAN-22412-US001 Rev. C00

302 Enzo Drive San Jose, CA 95138

Tel: 1-408-363-8000 Fax: 1-408-363-8313

User’s Manual

SSMTT-33M

2 SSMTT-33

WarningUsing the supplied equipment in a manner not specified by SunriseTelecom may impair the protection provided by the equipment.

CAUTIONS!• Do not remove or insert the module while the test set is on. Inserting or re -

moving a module with the power on may damage the module.• Do not remove or insert the software cartridge while the test set is on. Oth -

erwise, damage could occur to the cartridge.

End of Life Recycling and Disposal InformationDO NOT dispose of Waste Electrical and Electronic Equipment

(WEEE) as unsorted municipal waste. For proper disposal returnthe product to Sunrise Telecom. Please contact our local offices

or service centers for information on how to arrange the returnand recycling of any of our products.

EC Directive on Waste Electrical and Electronic Equip-

ment (WEEE)The Waste Electrical and Electronic Equipment Directive aims tominimize the impact of the disposal of electrical and electronic

equipment on the environment. It encourages and sets criteriafor the collection, treatment, recycling, recovery, and disposal ofwaste electrical and electronic equipment.

2010 Sunrise Telecom Incorporated. All rights reserved.

Disclaimer: Contents subject to change without notice and arenot guaranteed for accuracy.


Optical Test Toolkit Module Table of Contents

1 Optical Test Toolkit Module ................................................51.1 Module Panel .....................................................................51.2 Test Set LEDs ....................................................................5

2 Menus ..................................................................................62.1 Light Source ......................................................................7

2.2 Optical Power Meter ..........................................................82.3 Insertion Loss ..................................................................12

2.3.1 Set Source ....................................................................122.3.2 Referencing ..................................................................13

2.3.3 Loss Measurement .......................................................152.4 Optical Return Loss .........................................................172.4.1 Set Source ....................................................................17

2.4.2 Referencing ..................................................................172.4.3 Loss Measurement .......................................................17

2.5 Visual Fault Locator .........................................................202.6 View/Store/Print ...............................................................21

2.6.1 Saving a Test ................................................................222.6.2 Viewing a Stored Test ...................................................22

2.6.3 Printing a Stored Test ...................................................222.6.4 Deleting a Stored Test ..................................................222.6.5 Locking & Unlocking a Stored Test ...............................22

2.6.6 Renaming a Stored Test ...............................................23

3 Applications ......................................................................24

3.1 Fault Location and Cable ID ............................................243.2 LED Laser Source ...........................................................25

3.3 Loss Test (Power Meter + Laser Source) .........................253.3.1 STT to MTT ..................................................................25

3.3.2 MTT to MTT ..................................................................253.3.3 Optical Return Loss Test ..............................................26

4 Reference ..........................................................................27

4.1 Handling of Optical Fiber .................................................274.2 Fiber Optic Connectors ....................................................28

4.3 Cleaning Optical Fiber .....................................................294.4 Eye Safety .......................................................................29

4.5 Express Limited Warranty ................................................30

Index .......................................................................................31

4 SSMTT-33


1 Optical Test Toolkit Module

To get the best use from your equipment and ensure its safeoperation, please spend a few minutes to read this manual.

1.1 Module Panel

Power Meter Port

Protective Caps

Source (APC) Port

VFL Port

Figure 1 Module Connector Panel

The module can incorporate the following optical ports, dependingon the purchased hardware conguration:

Power Meter Port: This port is used for power meter testing.

Source (APC) Port: This port is used for laser source andoptical loss testing.

VFL Port: This port is used for the Visual Fault Locator.

The ports shown in Figure 1 come standard with type FC connec-tors. The module can be ordered with other connectors. Please

discuss this with your local Sunrise Telecom distributor.

1.2 Test Set LEDs

The module uses the following test set LEDs.

MODULE: Indicates that the test set is in module mode.

SIGNAL: When a threshold is set, this indicates that the measure-

ment is within that set threshold by a green LED.

ERRORS: When a threshold is set, this LED is red to indicatethat the measurement has gone outside of the set thresholds. If

the signal returns within the set thresholds after going outside thethresholds the LED ashes red. Press HISTORY to clear.

6 SSMTT-33

2 Menus

Press the MODULE key to access the Optical Test Toolkit Main

Menu. The menu tree shown in Figure 2 outlines functions of thismodule.

OPTICAL LOSS TEST TOOLKIT

MAIN MENU

LIGHT SOURCE

sec 2.1

OPTICAL POWER METER

sec 2.2

INSERTION LOSS

sec 2.3

OPTICAL RETURN LOSS

sec 2.4

VIEW/STORE/PRINT

sec 2.6

VISUAL FAULT LOCATOR

sec 2.5

MODULE

KEY

SET SOURCE

sec 2.3.1

REFERENCING

sec 2.3.2

INSERTION LOSS

LOSS MEASUREMENT

sec 2.3.3

SET SOURCE

sec 2.4.1

REFERENCING

sec 2.4.2

OPTICAL RETURN LOSS

LOSS MEASUREMENT

sec 2.4.3

Figure 2 Menu Tree for the SSMTT-33LTS and -33LTSP

Note that the SSMTT-33LS functions only as a light source, henceonly Section 2.1 of this manual applies to it’s use.


2.1 Light Source

Set up the light source for the module. Refer to Figure 3.

11:50:45

LIGHT SOURCE

WAVELENGTH : 1550 nmTX LEVEL : -5.50 dBmMODULATION FREQ: CWAUTO SHUT-OFF : OFF min

> <

>ET 000:00:00 ST 11:50:45<

1310 START1550

Laser OnLaser Off

11:53:45

LIGHT SOURCE

WAVELENGTH : 1550 nmTX LEVEL : -5.50 dBmMODULATION FREQ: CWAUTO SHUT-OFF : OFF min

>LIGHT SOURCE IS ON <

>ET 000:03:00 ST 11:50:45<

1310 START1550

Laser

Figure 3 Light Source Screen

Figure 3 shows the screen with the Laser off on the left, afterpushing START (F3 or F4) the screen changes as shown on the

right of Figure 3. The following items appear in this screen:

WAVELENGTH

Options: 1310, 1550, 850, 1490, 1625 (options presented dependon hardware conguration)

Select the desired wavelength.

TX LEVEL

Options: SSMTT-33LS; 0 through -10, default 0. -33LTS; -2.5 through10, default -2.5. -33LTSP; -5.50 through -10.00, default -5.50.

Change the transmit level by pushing and holding either (decre-

ment) DEC (F2) or (increment) INC (F4). You may also pressDEFAULT (F1). You also can enter the TX LEVEL by using SHIFT

and the numeric keypad.

MODULATION FREQ

Options: 270 (F1), 1000 (F2), 2000 (more, F1), CW (more, F2)

Choose your output modulation frequency.

AUTO SHUT-OFF

Options: OFF through 15 minutes

Choose to automatically turn off the laser. This can be set in 1

minute increments by pressing (decrement) DEC (F2) or (in-crement) INC (F4). Press DEC until OFF is displayed and the

feature is disabled. Once START is pressed, the Elapsed Time(ET) counter starts to count and the Start Time (ST) is displayed.The ET counter stops once the set time is reached or until STOP

is pressed. Pressing START resets the ET counter to zero andresets the ST to the current start time.

8 SSMTT-33

2.2 Optical Power Meter

11:50:45

OPTICAL POWER METER

MEASUREMENT MODE: BASICWAVELENGTH : 1550 nmMAX / MIN : ONTHRESHOLD : OFFUNIT : dB R REFERENCE: 0.00 dBm

MAX: -7.70 MIN: < -70

DARK C BASIC STORE

> <

>ET 000:01:00 ST 11:49:45<

-7.66 dB R

Figure 4 Optical Power Meter Screen

Use this screen to set up the Optical Power Meter measurement

parameters and to perform measurements. Note that measure-ment starts as soon as “HW CONFIGURE...” disappears, at that

point ET (Elapsed Time) starts and ST (Start Time) is recorded.The measurement is displayed under the UNIT line. At any timepress STORE (F4) to record your measurement. For details on

storing, refer to Section 2.6 .

The following items are found in Figure 4:

MEASUREMENT MODEOptions: DARK C (F1), BASIC (F2) default, PON (F3-only on

SSMTT-33PON)

• DARK C: An accurate power level measurement relies ona sensitive photo diode. The power reading is related to the

current generated by the photo diode. Even if there were noincident radiation emitted to the photo diode, the photo diode

would still have a current output. This is caused by thermalnoise and is called dark current. Dark current is sensitive totemperature of the environment and, as a result, will affect the

power level reading.

To get accurate power level measurements in varying tempera-

ture environments, you will need to calibrate the dark currentbefore you make a power measurement.

Calibrate the dark current by tightly capping the power meter port

using the module’s attached port caps. The dark current value willbe measured, stored and used for the power measurement.

The screen shown in Figure 5 allows you to calibrate for darkcurrent. To perform the calibration:


1. Cap the Power Meter Port with the attached cap.

2. Press DARK C (F1) and the screen shown in Figure 5 is

displayed. In this screen observe the DARK CURRENT

reading. When the reading is steady press SET (F4). The

test set will now compensate for the dark current. Note that

when you turn off the test set, the calibration is lost.

11:50:45

CALB DARK CURRENT

DARK CURRENT

SET

> Seal the PM Port Tightly <> <

0.09641 V

Figure 5 Calibrate Dark Current Screen

3. Press ESC to return to the screen shown in Figure 4.

• BASIC: This is the default measurement mode. If used, con-

nect the ber to the Power Meter Port• PON: This simultaneously measures the 1490 and 1550 nm

wavelengths. If used, connect the ber to the PON Port.

WAVELENGTH

Options: 850, 1310, 1490, 1550, or 1625 (options presenteddepend on hardware conguration).

Select the wavelength to measure by pressing PREV (F1) orNEXT (F2).

MIN / MAXOptions: ON (F1), OFF (F2)

Choose whether to display the minimum and maximum received

values since the start of the measurement. In Figure 4 this is setto ON and the measurement is display near the bottom of the

screen at MAX and MIN.

10 SSMTT-33

THRESHOLDOptions: ON (F1), OFF (F2), SET (F3)

• ON: Enables the set threshold.

• OFF: Disables any set threshold.• SET: Press to congure the thresholds used for your measure-

ments. If pressed, the following screen is displayed:

11:50:45

THRESHOLD

MODE : LED.TXT

MAX POWER: 5.00 dBm

MIN POWER: -50.00 dBm

TOLERANCE: 0.50 dBm

SETLED LED.TXT

Figure 6 Threshold Configuration Screen

Congure the following:

MODE

Options: LED (F1), LED.TXT (F2)

Determine how you are notied about a threshold violation. Notethat a flashing ERRORS LED indicates that a threshold viola-

tion has occurred, but is no longer present. Press HISTORY toclear.

• LED: This enables the ERRORS LED to indicate a thresholdviolation by illuminating red.

• LED.TXT: In addition to the ERRORS LED, you will see a on-screen notice about a threshold violation.

Note: If congured for PON mode, two sets of the following settings

for the 1490 and 1550 nm wavelengths are available.

MAX POWER

Set the Maximum Power by pressing DEC (F2) or INC (F3),change the sign by pressing +/- (F1). You also can change it byusing SHIFT and the numeric keypad.


MIN POWERSet the Minimum Power by pressing DEC (F2) or INC (F3), change

the sign by pressing +/- (F1). You also can change it by usingSHIFT and the numeric keypad.

TOLERANCESet the tolerance for the MIN and MAX Power threshold settings

in dBm. If the received power is in violation of a MAX/MIN setting,but within your tolerance setting, the test set will display MARG,but the ERRORS LED will be off.

Change TOLERANCE by pushing and holding either (decrement)

DEC (F2) or (increment) INC (F3). You also can change it by usingSHIFT and the numeric keypad.

When done, press SET (F4) to return to the Optical Power MeterScreen shown in Figure 4.

UNIT

Options: dBm (F1), uW (F2), dB R (F3)

Select the unit of measurement.

• dBm: This is an absolute decibel power measurement.• uW: This measures power in microwatts.• dB R: This is a relative decibel power measurement; power is

measured with a reference to the set reference point. If used,an additional setting is displayed, REF. You will then need to

enter a reference for your measurement. Note that the currentmeasured power level can be set as a reference by pressing

SET (F1) when the REFERENCE line is selected.

When done, press ESC to return to the module main menu

screen.

12 SSMTT-33

2.3 Insertion Loss

This menu screen contains the following items:

• SET SOURCE• REFERENCING

• LOSS MEASUREMENT

2.3.1 Set Source

Set the transmit level of the source for Referencing and/or LossMeasurement in the following screen:

11:50:45

SET SOURCE

INC

> <

>ET 000:00:03 ST 11:50:42<

TX LEVEL : -2.50 dBm

DEFAULT DEC START

Figure 7 Set Source Screen

TX LEVELOptions: SSMTT-33LTS; -2.50 through -10.00, default -2.50. -

33LTSP; -5.50 through -10.00, default -5.50

Change the transmit level by pushing and holding either (decre-

ment) DEC (F2) or (increment) INC (F4). You may also pressDEFAULT (F1). You also can enter the TX LEVEL by using SHIFTand the numeric keypad.

You may press START (F3) in this screen to enter the optical

insertion loss measurement screen. Note that doing so skips theReferencing step.


2.3.2 Referencing

This procedure allows the test set to account for the loss of the testsetup, i.e., the patch cable used to connect to the circuit. It should

be performed for both test sets used in the Insertion Loss test.

1. Using the patch cord you use for testing, connect the Source(APC) port to the Power Meter port as shown in Figure 8.

Power Meter Port

Source (APC) Port

Optic cable used to connect to circuit.

Figure 8 Referencing Connections

2. Select INSERTION LOSS > REFERENCING and refer toFigure 9.

11:50:45

REFERENCING

SET

> <

>ET 000:00:03 ST 11:50:42<

START

POWER: -3.94 -3.98

1310 1550

CONNECT POWER METER PORT

TO LASER SOURCE PORT

Note: A thirdwavelength (1490nm) column maybe displayed in thisscreen dependingon your purchasedoptions.

Figure 9 Insertion Loss Referencing Screen

14 SSMTT-33

3. Press START (F4) to begin transmitting the source and mea-suring power.

4. Press SET (F3) to save the reference result and go to thescreen shown in Figure 11. Refer to Section 2.3.3 for details.

5. Disconnect the end of the patch cable that is connected tothe Power Meter Port and connect it to the Fiber Under Test

(FUT). Do so on both test sets.

• Note: If the test set is turned off, the reference result is lost.

The screen shown in Figure 9 contains the following:

ST: Start Time since pressing START (F4).

ET: Elapsed Time since pressing START (F4). Note that both

times are in HHH:MM:SS format.

POWER: Reports the measured power level for each availablewavelength.


2.3.3 Loss Measurement

This measurement requires two test sets connected together inInsertion Loss mode as in Figure 10; start the test at either end.

Source (APC) Port

Source (APC) Port

(A)

Near end

(B)

Far end

Patch Cable

Patch Cable

Connection

Points

Fiber Under Test

Figure 10 Insertion Loss Connection

>CONNECTED <

>ET 000:00:59 ST 11:49:44<

11:50:45

INSERTION LOSS

STOP STORE

A2B Tx: -3.91 -4.00

B Rx: -3.83 -4.35

LOSS: -0.08 -0.32

B2A Tx: -5.50 -5.50

A Rx: -5.59 -5.73

LOSS: 0.10 0.23

* 1310 1550

UNIT : dBm

dBm uW

Note: A thirdwavelength (1490nm) column maybe displayed in thisscreen dependingon your purchasedoptions.

Figure 11 Insertion Loss Measurement Screen

This screen contains the following:

UNIT

Options: dBm (F1), uW (F2)

• Select your measure mode dBm or uW.

16 SSMTT-33

At any time press F3 to start measuring, press again to stop.

During the measurement you may store the measurement by

pressing F4. Refer to Section 2.6 for details.

After pressing START (F3) the following information is presentedfor different wavelengths. Press STOP (F3) to halt measuring.

A2B Tx: Near-to-far transmit power level.

B Rx: Power level received from the far end.

LOSS: Power loss from near to far end.

B2A Tx: Far-to-near transmit power level.

A Rx: Measured power from the near end.

LOSS: Power loss from far to near end.

Note: A = near-end, B = far-end


2.4 Optical Return Loss

The Optical Return Loss menu screen contains the following

items:

• SET SOURCE• REFERENCING• LOSS MEASUREMENT

2.4.1 Set Source

Refer to Section 2.3.1.

2.4.2 Referencing

Refer to Section 2.3.2 .

2.4.3 Loss Measurement

This procedure can be accomplished as a one-way test or as atwo-way test. The one-way test is available in the SSMTT-33LTS

and the SSMTT-33LTSP, the two-way test is only available in theSSMTT-33LTSP.

Transmitted

Signal Source (APC) Port

Connector, defect, or break in the l ine.

Received

Signal

One-way Test

Two-way Test

(A)Near End

(B)Far End

Far end test setprovides termination.

Source (APC) Port

Source(APC) Port

Figure 12 Optical Return Loss Connection

18 SSMTT-33

RefZero STOPRst Ref MORE

11:50:45

OPTICAL RETURN LOSS

dBm

> Fiber should be terminated. <

>ET 000:00:03 ST 11:50:42<

STOP

POWER : -19.36 -19.35

ORL : 15.27 15.54

1310 1550

uW MORE

MEASUREMENT MODE:1-WAY

UNIT : dBm

Laser

STOPSTORE MORE

Notes:• A third wavelength

(1490 nm) columnmay be displayed inthis screen dependingon your purchasedoptions.

• MEASUREMENTMODE is onlyavailable for theSSMTT-33LTSP

Figure 13 Optical Return Loss Measurement Screen

This screen contains the following:

MEASUREMENT MODEOptions: 1-WAY (F1), 2-WAY (F2)

Choose either a 1-way or a 2-way test setup, as shown in Figure 12.

The SSMTT-33LTS does not have this setting, it is xed at 1-way.

UNIT

Options: dBm (F1), uW ( F3), RefZero (MORE, F1), Rst Ref(MORE, F2)

• Select your measure mode dBm or uW.

• Press START (F3) to begin measuring.• RefZero: Zero out the current ORL value and use it as a refer-

ence point. Refer to Figure 14.• Rst Ref: Removes the current RefZero and resets the RefZero

value.• During the measurement you may store it by pressing STORE

(MORE, F2). Refer to Section 2.6 for details.

The following is reported in this screen:

POWER: Return (reected) power.

ORL: Optical Return Loss value.


When RefZero (MORE, F1) is pressed the RefZero values are

then displayed.

Note: Perform the DarkC calibrationto your test set and perform the

Referencing procedure to your patch

cable before you perform this test.

1. Apply termination at point B and

start the Optical Return Loss(ORL) measurement.

2. Set RefZero to zero out ORL

between points A and B.3. Remove termination at point B and

apply the termination at point C,right after component D.

4. The measured ORL is the ORL

caused by component D.

B Termination

C

D

A

Connection

to FUT

Patch Cable

Figure 14 Measuring ORL of a Network Component

20 SSMTT-33

2.5 Visual Fault Locator

The Visual Fault Locator works by transmitting a visible light signalat 650 nm. The signal can be set to Continuous Wave (CW) mode

or modulated at 2 Hz. At a fault, visible light appears. It works bestover distances of less than 1 km but can have a range of up to 5

km. Use the following screen to set up the light signal.

11:50:45

VISUAL FAULT LOCATOR

2 Hz STOP

CONTINUOUS

WAVE

MODULATION FREQ

CW

VFL

Figure 15 Visual Fault Location Screen

The screen contains one item to configure, it is:

MODULATION FREQ

Option: 2 Hz (F1), CW (F2)

Select either a 2 Hz (on/off pulse) or a Continuous Wave (alwayson) signal.

When ready press START (F3) to turn on the light source. Press

STOP (F3) to turn off the light source. VFL indicates that the Vis-ible Frequency Laser is active.


2.6 View/Store/Print

You may store up to 50 different results to view or print at a latertime. To store results, use the procedure in Section 2.6.1.

RENAME DELETE moreUN/LOCK

11:50:45

VIEW/STORE/PRINT

VIEW PRINT more

Free space: 160 KbyteNAME TYPE LOCK

1.2.3.4.5.6.7.8.9.10.

OPM 010815_12:21 OLTSRL 010818_10:27 OLTS

Figure 16 View/Store/Print File Selection Screen

The following F-keys are available in this screen.

VIEW (F1): Allows viewing of a selected le, see Section 2.6.2 .

PRINT (F3): Allows printing of a selected le, see Section 2.6.3 .

RENAME (more, F1): Allows renaming a selected le, see Sec-

tion 2.6.6.

UN/LOCK (more, F2): Allows locking and unlocking a le, seeSection 2.6.5 .

DELETE (more, F3): Allows deleting a le, unless locked, see

Section 2.6.4 .

22 SSMTT-33

2.6.1 Saving a Test

1. From any screen with a STORE F-key, press it and the recordis stored. The filename is based on the type of test, date, and

time of day.

2.6.2 Viewing a Stored Test

1. From the OPTICAL TEST TOOLKIT main menu, select VIEW/ STORE/PRINT.

2. Select the desired le with the keypad up/down cursor keys.3. Press VIEW (F1) and the stored result will appear.

4. Use the keypad up/down cursor keys to scroll through theavailable screens.

5. When nished, press ESC to return to the VIEW/STORE/PRINT screen.

2.6.3 Printing a Stored Test

1. Connect a SunSet printer to the serial port of the test set.

• For other types of printers or for more information, refer to theStoring and Printing chapter in the test set user’s manual.

2. From OPTICAL TEST TOOLKIT main menu, select VIEW/

STORE/PRINT.3. Select the desired le with the keypad up/down cursor keys.4. Press PRINT (F3) and the le will begin printing.

5. When nished, press ESC to return to the VIEW/STORE/PRINT screen.

2.6.4 Deleting a Stored Test


2. Select the desired le with the keypad up/down cursor keys.

3. Press DELETE (more, F3) and the file is deleted (if it is un-locked).

2.6.5 Locking & Unlocking a Stored Test


2. Select the desired le with the keypad up/down cursor keys.3. Press UN/LOCK (more, F2) and the le is locked or unlocked

as indicated to the right of the file name. Refer to the lock icon

shown in Figure 16.


2.6.6 Renaming a Stored Test


2. Select the desired le using the keypad up/down cursor keys.

A. Press UN/LOCK (more, F2) if the le is locked.

3. Press RENAME (more, F2) and a character screen is displayed

like in Figure 17.

11:50:45

VIEW/STORE/PRINT

INSERT INPUT SAVE

FILENAME: RL 010818_10:27

DELETE

INSERT STOP SAVEDELETE

A a B b C c D d E e F f Gg H h I i J j K k L l M mN n O o P p Q q R r S s Tt U u V v W w X x Y y Z z- / 0 1 2 3 4 5 6 7 8 9 *# @ _ . ! ? $ % & +

Figure 17 Character Input Screen

4. Press INPUT (F3). Note that the ‘A’ character is highlightedand the INPUT F-key has changed to STOP.

5. Use the keypad cursor keys to move the cursor to the desiredcharacter.

6. Press ENTER to place the desired character in the FILENAMEline. Continue this process until the name is complete. You mayenter up to 15 characters.

• If you make a mistake in the entry:

A. Press STOP (F3).

B. Move the FILENAME cursor to the incorrect character.

C. Press DELETE (F2) to delete the character or, press IN-

SERT (F1) to insert a character.

D. Press INPUT (F3) to select a character. Press ENTER to

insert the new character to the left of the cursor.

7. Press SAVE (F4) to save and return to the View/Store/Printscreen shown in Figure 16.

24 SSMTT-33

3 Applications

The insertion loss and optical return loss features of this moduleare handy economical tools for analyzing the physical plant equip-

ment and systems during design, installation, maintenance, andtroubleshooting phases of optical ber networks.

3.1 Fault Location and Cable ID

The module can emit visible laser light (Class 2), which can beused for locating macrobends and broken fibers that may occurwithin the OTDR dead zone. This laser indicates the physical loca-

tion of faults with red light. It can also be used for ber identicationand checking for connector scratches. It works best at distances

of less than 1 km but can be usable up to 5 km.

Detect breaks in OTDR dead zone

Highlight sharp bends where losses occur

Mechanical/fusion splice optimization

Connector surface scratch detection

Defective connector detection

End-to-end fiber identification inmultifiber cables

Figure 18 Fault Locating and Cable ID


3.2 LED Laser Source

The module can be used as a light source in ber network ser-vice verication. Supports switchable wavelengths of 850/1310,

1310/1550, and 1550/1625 nm.

3.3 Loss Test (Power Meter + Laser Source)

3.3.1 STT to MTT

Using a Loss Test Module in both the STT and MTT, loss testing

can be done. Bidirectional test results are displayed on both nearend and far end testers.

ResponderController

Figure 19 STT to MTT

3.3.2 MTT to MTT

Using a Loss Test Module in an MTT at each end, loss testingcan be done. Bidirectional test results are displayed on both near

end and far end testers.

Responder

Controller

Figure 20 MTT to MTT

26 SSMTT-33

3.3.3 Optical Return Loss Test

Return loss is the total accumulated back reflection passingthrough a particular point on a fiber. Back reflection reduces sys-

tem performance by degrading transmitter stability and causesreections in the ber system, which introduces bit errors. TheOptical Return Loss feature measures the cumulative link return

loss and individual component reflectance to detect ORL troublesin the system.


4 Reference

4.1 Handling of Optical Fiber

Proper handling of optical fiber cables, connectors, and equipment

is important in obtaining accurate measurements and prevent-ing potential transmission problems. This section reviews proper

handling procedures for optical fiber.

SC Connector Bulkhead Adaptor FC Connector

Key

Alignment SleeveKey

Barrel

Ferrule

Figure 21 Optical Connectors and Adapters

Fiber Optic Patch Cord BasicsFiber optic patch cords come in two categories: Single-mode,

which are yellow and Multi-mode, which are orange. The terms“single-mode” and “multi-mode” describe physical transmission

mechanisms of the fiber and do not refer to the quality of the fiber.Single-mode and multi-mode transmission equipment are notusually interconnected. Multi-mode is used for shorter transmis-

sion distance and in general is less expensive than single-mode.For testing and analysis purposes, single-mode and multi-mode

may be mixed.

Considering the fact that an optical fiber is a strand of glass aboutthe same diameter as a human hair, fiber optic patch cords and

connectors are remarkably durable. However, careful handling willensure continued high performance and long life. Do not pull orkink patch cords, as the glass strand in the middle might become

damaged or broken.

Even if the ber is not permanently damaged, a sharp bend willcause excessive signal loss. Fiber optic cables work by bending

the light signal as it travels. But, the light can only tolerate so muchbending. Keep patch cord bend radii to no less than an inch. Use

specialized optical cable raceways and plenums whenever avail-able. Never use tie wraps as you would with electrical cables.

28 SSMTT-33

4.2 Fiber Optic Connectors

Alignment Sleeve Ferrule of Connector B

Ferrule of Connector A Alignment Sleeve

FiberFiber End Faces Touch

Figure 22 Cross-Sectional View of Connectors

In the electrical world, female connectors are mated to maleconnectors. In the optical world, the connection mechanism is

altogether different. Fiber optic connector systems are designedto align two ber ends so that the light signal will pass between

them; imagine trying to align two hairs end to end. Modern beroptic connector systems solve this nearly impossible task. There

are several types of optical connectors in use today. Figure 21shows the two most popular, SC and FC. In this example, an SC toFC bulkhead adapter is used to connect the two bers together.

In Figure 22, a schematic of the connector cross section demon-

strates the details of the connection mechanism. Ceramic ferruleson the connector ends are kept in alignment by a sleeve in the

connector bulkhead adapter. The fiber itself is mounted in theexact center of the ferrule. When the ferrules are aligned by the

sleeve, so are the fibers. Springs in the connector bodies provideconsistent pressure so that the two connector end faces are as-sured to be in contact with each other. Since all tolerances must

be kept extremely tight, it is amazing that the typical connectorsignal loss is usually less than a couple tenths of a dB.

When using optical connectors, insert or remove the ferrule

straight into the sleeve. Try to minimize wiggling the connector asthis may loosen the tight t between the ferrule and sleeve. For

SC connectors, orient the prominent key on the connector body(Figure 21) with the slot in the bulkhead adapter. Push the con-nector until it clicks. To remove, pinch the connector body between

your thumb and finger, and gently pull straight out.

FC connectors require more care. Find the small key and orient itwith the equally small slot in the threaded section of the bulkhead

adapter. Even in Figure 21, this key is not very visible. Thread theouter barrel only lightly finger tight. Never use pliers! Over tight-

ening the barrel will not improve signal transmission and could


cause permanent damage. To remove, unthread the barrel, and

gently pull straight out.

Most problems with FC connectors are due to key misalignment.This is difcult to detect since even when the key is misaligned, thebarrel can be threaded, which then hides the misaligned key. A hint

is when the barrel only catches the rst one or two threads. Also, theconnector will not be completely seated in the bulkhead adapter.

4.3 Cleaning Optical Fiber

Fiber optic connectors must be kept clean to ensure long life and

to minimize transmission loss at the connection point. When not inuse, always replace dust covers and caps to prevent deposits andlms from airborne particles. A single dust particle caught between

two connectors will cause signicant signal loss. Even worse, dustparticles can scratch the polished fiber end, resulting in permanent

damage. Do not touch the connector end or the ferrules, sincethis will leave an oily deposit from your ngers. Likewise, do not

allow uncapped connectors to drop on the oor.

Should a fiber connector become dir ty or exhibit high loss, care-fully clean the entire ferrule and end face. Special lint-free padsshould be used with isopropyl alcohol. Even though not very ac-

cessible, the end face in a bulkhead adapter on test equipmentcan be cleaned by using a special lint-free swab, again with

isopropyl alcohol. In extreme cases, test equipment may requiremore thorough cleaning at the factory.

Cotton, paper, or solvents should never be used for cleaning since

they may leave behind particles or residues. Use a fiber opticcleaning kit especially made for cleaning optical connectors, andfollow the directions. Some kits come with canned air to blow any

dust out of the bulkhead adapters. Be cautious, as canned air cando more harm than good if not used properly. Again, follow the

directions that come with the kit.

4.4 Eye Safety

It is good safety practice to never look directly into the end of aber or bulkhead adapter. You may be working with equipment thattransmits at high power and are not eye-safe. For added safety, turn

the laser off when not in use. In any case, the wavelengths used intelecommunications are not visible, so the presence of an optical

signal cannot be determined by looking into the fiber end.

Summary

Take care of your ber. Always replace dust covers. Keep optical con-nectors clean and make a practice of not looking into fiber ends.

30 SSMTT-33

4.5 Express Limited Warranty

This Sunrise Telecom product is warranted against defects inmaterials and workmanship during its warranty period. The war-

ranty period for this product is contained in the warranty page onhttp://www.sunrisetelecom.com.

Sunrise Telecom agrees to repair or replace any assembly or

component found to be defective under normal use during thisperiod. The obligation under this warranty is limited solely to re-pairing or replacing the product that proves to be defective within

the scope of the warranty when returned to the factory. This war -ranty does not apply under certain conditions, as set forth on the

warranty page on http://www.sunrisetelecom.com.

Please refer to the website for specic details.THIS IS A LIMITED WARRANTY AND THE ONLY WARRANTY

MADE BY SUNRISE TELECOM. SUNRISE TELECOM MAKESNO OTHER WARRANTY, REPR SENTATION OR CONDITION,EXPRESS OR IMPLIED, AND EXPRESSLY DISCLAIMS THE

IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESSFOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT

OF THIRD PARTY RIGHTS.


Index

A

ApplicationsLED/Laser Source; 25

Loss Test (Power Meter + Laser Source); 25Optical Return Loss Test; 26

Visual Fault Locator; 24

C

Cautions; 2

F

Figures01 Module Connector Panel; 502 Menu Tree for the SSMTT-33LTS and -33LTSP; 6

03 Light Source Screen; 704 Optical Power Meter Screen; 8

05 Calibrate Dark Current Screen; 906 Threshold Configuration Screen; 10

07 Set Source Screen; 1208 Referencing Connections; 1309 Insertion Loss Referencing Screen; 13

10 Insertion Loss Connection; 1511 Insertion Loss Screen; 15

12 Optical Return Loss Connection; 1713 Optical Return Loss Measurement Screen; 18

14 Measuring ORL of a Network Component; 1915 Visual Fault Location Screens; 2016 View/Store/Print File Selection Screen; 21

17 Character Input Screen; 2318 Fault Locating and Cable ID; 24

19 STT to MTT; 2520 MTT to MTT; 25

21 Optical Connectors and Adapters; 2722 Cross-Sectional View of Connectors; 28

H

Handling of Optical Fiber; 27

I

Insertion Loss Measurement Screen

A2B Tx; 16A Rx; 16B2A Tx; 16

B Rx; 16LOSS; 16

32 SSMTT-33

L

LED/Laser Source ScreenAUTO SHUT-OFF; 7

MODULATION FREQ; 7TX LEVEL; 7

WAVELENGTH; 7Loss Measurement Screen

MEASUREMENT MODE1-WAY; 182-WAY; 18

ORL; 18POWER; 18

UNIT; 18

M

Module Panel

PortsPower Meter; 5

Source (APC); 5type FC; 5Visual Fault Locator; 5

O

Optical Power Meter ScreenBASIC; 9

DARK C; 8MEASUREMENT MODE; 8

MIN / MAX; 9THRESHOLD; 10

UNIT; 11WAVELENGTH; 9

R

Referencing; 13

S

Set Source ScreenTX LEVEL; 12

T

Test Set LEDsERRORS; 5

MODULE; 5SIGNAL; 5

Threshold Configuration ScreenMAX POWER; 10

MIN POWER; 11


MODE

LED; 10LED.TXT; 10

TOLERANCE; 11

V

View/Store/Print ScreenDeleting a Stored Test; 22

Locking & Unlocking a Stored Test; 22Printing a Stored Test; 22

Renaming a Stored Test; 23Saving a Test; 22

Viewing a Stored Test; 22Visual Fault Locator

MODULATION FREQ; 20

W

Warnings; 2Warranty; 30

34 SSMTT-33

Date post:	04-Jun-2018
Category:	Documents
Upload:	cirosv
View:	224 times
Download:	0 times

MAN-22412-US001 C00 SSMTT-33 Optical Test Toolkit User Manual MMD

Documents