EXFO FTB-3930 User Manual

FTB-3930

Multifunction Loss Tester

User Guide

Copyright © 2004–2014 EXFO Inc. All rights reserved. No part of this publication may be reproduced, stored in a retrieval system or transmitted in any form, be it electronically, mechanically, or by any other means such as photocopying, recording or otherwise, without the prior written permission of EXFO Inc. (EXFO).

Information provided by EXFO is believed to be accurate and reliable. However, no responsibility is assumed by EXFO for its use nor for any infringements of patents or other rights of third parties that may result from its use. No license is granted by implication or otherwise under any patent rights of EXFO.

EXFO’s Commerce And Government Entities (CAGE) code under the North Atlantic Treaty Organization (NATO) is 0L8C3.

The information contained in this publication is subject to change without notice.

Trademarks

EXFO’s trademarks have been identified as such. However, the presence or absence of such identification does not affect the legal status of any trademark.

Units of Measurement

Units of measurement in this publication conform to SI standards and practices.

Version number: 9.0.2

ii FTB-3930

Contents

Certification Information ........................................................................................................v

1 Introducing the FTB-3930 Multifunction Loss Tester ................................. 1

Main Features .........................................................................................................................1

Typical Applications ................................................................................................................3

Conventions ............................................................................................................................4

2 Safety Information ....................................................................................... 5

Other Safety Symbols on Your Unit .........................................................................................6

Laser Safety Information (Units without VFL) ..........................................................................7

Laser Safety Information (Units with VFL) ...............................................................................7

Electrical Safety Information ...................................................................................................8

3 Customizing Your Multifunction Loss Tester .............................................. 9

4 Setting Up Your Multifunction Loss Tester ............................................... 11

Installing the EXFO Universal Interface (EUI) .........................................................................11

Cleaning and Connecting Optical Fibers ...............................................................................12

Setting Autonaming Scheme ................................................................................................14

Setting Pass/Fail Thresholds ..................................................................................................16

5 Measuring Power or Loss .......................................................................... 19

Defining the List of Favorite Wavelengths .............................................................................20

Nulling Electrical Offsets .......................................................................................................22

Referencing Your Power Meter to a Source ...........................................................................23

Measuring Power or Loss ......................................................................................................26

6 Measuring Optical Return Loss ................................................................. 29

Performing ORL Reference and Setting ORL Zero Value ........................................................30

Performing and Saving ORL Measurements ..........................................................................32

7 Performing Automated IL/ORL/Length Measurements (FasTesT) ............ 35

Setting Up the FasTest ...........................................................................................................36

Referencing Units for FasTesT ................................................................................................38

Performing the FasTesT .........................................................................................................43

8 Managing Test Results ............................................................................... 49

Viewing and Deleting Results ...............................................................................................49

Customizing Result Display ...................................................................................................52

Customizing and Printing Reports (FTB-500) ........................................................................54

9 Using a Light Source .................................................................................. 57

Multifunction Loss Tester iii

Contents

10 Identifying Fiber Faults Visually ................................................................61

11 Communicating with Other Users .............................................................63

Sending and Receiving Text Messages ..................................................................................63

Communicating by Voice ......................................................................................................66

12 Maintenance ................................................................................................69

Cleaning EUI Connectors ......................................................................................................69

Cleaning Detector Ports ........................................................................................................72

Cleaning VFL-Type Connectors ..............................................................................................73

Recalibrating the Unit ...........................................................................................................74

Recycling and Disposal (Applies to European Union Only) ....................................................75

13 Troubleshooting ..........................................................................................77

Solving Common Problems ...................................................................................................77

Obtaining Online Help ..........................................................................................................80

Contacting the Technical Support Group ..............................................................................81

Transportation ......................................................................................................................82

14 Warranty ......................................................................................................83

General Information .............................................................................................................83

Liability .................................................................................................................................84

Exclusions .............................................................................................................................84

Certification ..........................................................................................................................84

Service and Repairs ...............................................................................................................85

EXFO Service Centers Worldwide ..........................................................................................86

A Technical Specifications ..............................................................................87

Index .................................................................................................................89

iv FTB-3930

Certification Information

North America Regulatory Statement

This unit was certified by an agency approved in both Canada and the United States of America. It has been evaluated according to applicable North American approved standards for product safety for use in Canada and the United States.

Electronic test and measurement equipment is exempt from FCC part 15, subpart B compliance in the United States of America and from ICES-003 compliance in Canada. However, EXFO Inc. makes reasonable efforts to ensure compliance to the applicable standards.

The limits set by these standards are designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial environment. This equipment generates, uses, and can radiate radio frequency energy and, if not installed and used in accordance with the user guide, may cause harmful interference to radio communications. Operation of this equipment in a residential area is likely to cause harmful interference in which case the user will be required to correct the interference at his own expense.

Modifications not expressly approved by the manufacturer could void the user's authority to operate the equipment.

European Community Declaration of Conformity

An electronic version of the declaration of conformity for your product is available on our website at www.exfo.com. Refer to the product’s page on the Web site for details.

Multifunction Loss Tester v

1 Introducing the FTB-3930

FTB-3930

MULTITEST

Headset connector (for any

commercially available

headset equipped with a

microphone, and having a

2.5 mm connector)

Power meter detector port

Visual fault locator port

Multimode port (F

ASTEST and light source)

or talk set port

Singlemode port (F

ASTEST,

light source and ORL meter)

Multifunction Loss Tester

The FTB-3930 Multifunction Loss Tester integrates a power meter and light sources with an optical return loss meter, optional talk set and visual fault locator.

Main Features

The unit features FASTEST™, EXFO’s one-touch automated measurement. In 10 seconds, you can simultaneously test IL and ORL at up to four wavelengths, in both directions. During the same test, the unit also determines fiber length.

Note: Optical ports and connectors may differ from the illustration.

Multifunction Loss Tester 1

Introducing the FTB-3930 Multifunction Loss Tester

Main Features

The power meter has the following characteristics:

 Ge, GeX or InGaAs detector with 40 calibrated wavelengths to measure

absolute power or link loss

 Editable list of favorite wavelengths for easy access

 Modulated signal detection

 No offset nulling required in normal operation

The light source has the following characteristics:

 Singlemode port (two or three wavelengths), also used for FASTEST and

ORL.

AND/OR

Multimode port (two wavelengths), also used for F

 Modulated or high-power signal compatible with other EXFO units

ASTEST only.

2 FTB-3930

Introducing the FTB-3930 Multifunction Loss Tester

Typical Applications

Other test utilities:

 Text messaging

 Full-duplex digital talk set (optional)

 Visual fault locator to inspect or identify fibers (optional)

Result processing and analysis features (also available in the FastReporter application):

 Analyze data acquired on the field using a tabular format

 Customizable test thresholds with visual pass/fail analysis

 Transfer data from the FOT-930 Multifunction Loss Tester (using the

Handheld Data Transfer application) for easier management and greater storage capacity

 Save your OLTS data in popular text formats (XML, ASCII, etc.) or

convert older result files to the new format for analysis

 Customize user settings and cable identification parameters

 Generate and print reports about OLTS data, including user and test

location information and operator comments

 FASTEST results displayed according to FTTx usage and terminology

Typical Applications

You can use the Multifunction Loss Tester for several applications, such as:

 Fiber installation and maintenance applications

 FTTx: testing of passive optical networks (PONs)

 Absolute power or link loss measurements

 Bidirectional loss and ORL testing

 Length measurement

 All-in-one tool for contractors

Multifunction Loss Tester 3

Introducing the FTB-3930 Multifunction Loss Tester

Conventions

Before using the product described in this guide, you should understand the following conventions:

WARNING

Indicates a potentially hazardous situation which, if not avoided, could result in death or serious injury. Do not proceed unless you understand and meet the required conditions.

CAUTION

Indicates a potentially hazardous situation which, if not avoided, may result in minor or moderate injury. Do not proceed unless you understand and meet the required conditions.

CAUTION

Indicates a potentially hazardous situation which, if not avoided, may result in component damage. Do not proceed unless you understand and meet the required conditions.

IMPORTANT

Refers to information about this product you should not overlook.

4 FTB-3930

2 Safety Information

WARNING

Do not install or terminate fibers while a light source is active. Never look directly into a live fiber and ensure that your eyes are protected at all times.

WARNING

The use of controls, adjustments and procedures, namely for operation and maintenance, other than those specified herein may result in hazardous radiation exposure or impair the protection provided by this unit.

IMPORTANT

When you see the following symbol on your unit , make sure that you refer to the instructions provided in your user documentation. Ensure that you understand and meet the required conditions before using your product.

IMPORTANT

Other safety instructions relevant for your product are located throughout this documentation, depending on the action to perform. Make sure to read them carefully when they apply to your situation.

Multifunction Loss Tester 5

Safety Information

Other Safety Symbols on Your Unit

One or more of the following symbols may also appear on your unit.

Symbol Meaning

Direct current

Alternating current

The unit is equipped with an earth (ground) terminal.

The unit is equipped with a protective conductor terminal.

The unit is equipped with a frame or chassis terminal.

On (Power)

Off (Power)

6 FTB-3930

Safety Information

Affixed to

side of module

Indicated on

front panel

Laser Safety Information (Units without VFL)

Your instrument is a Class 1 laser product in compliance with standards IEC 60825-1: 2007 and 21 CFR 1040.10, except for deviations pursuant to Laser Notice No. 50, dated June 24, 2007. Invisible laser radiation may be encountered at the output port.

The following label indicates that a product contains a Class 1 source:

Note: The label is shown for information purposes only and are not necessarily

applied on your module.

Laser Safety Information (Units with VFL)

Your instrument is a Class 3R laser product in compliance with standards IEC 60825-1: 2007 and 21 CFR 1040.10, except for deviations pursuant to Laser Notice No. 50, dated June 24, 2007. Laser radiation is emitted at the output port. It is potentially harmful in direct intrabeam viewing.

The following label(s) indicate that the product contains a Class 3R source:

The maximum input power for the FTB-3930 Multifunction Loss Tester is 1.48 W. For more information on equipment ratings, refer to the user documentation for your platform.

Multifunction Loss Tester 7

Safety Information

Electrical Safety Information

When you use the unit outdoors, ensure that it is protected from liquids, dust, direct sunlight, precipitation, and full wind pressure.

CAUTION

8 FTB-3930

3 Customizing Your

Multifunction Loss Tester

Note: Your screen display may differ slightly from the figures in this user

documentation depending on the platform you are using.

To set a length/distance unit and data display color (for the FTB-500):

1. From the main window, press Setup, then select the Preferences tab.

2. Select the desired unit. In the case of the FTB-500 platform, you can

also select the background color.

Note: The length unit affects thresholds and fiber length only.

Multifunction Loss Tester 9

Customizing Your Multifunction Loss Tester

To automate adding and saving results:

1. From the main window, press Setup, then select the Preferences tab.

2. Select one or more of the following options:

 Save file after adding each result to list: if you select this option,

you will not need to manually save your file (with Save or Save As) after adding your result to the Te s te d fibe r s list. The asterisk will never appear in the title bar. In the case of the FTB-200 v2 platform, the file is saved after adding 10 results to the list.

 Add result to list on this unit after FASTEST: if you select this

option, you will not need to press Add to add your result to the Test e d fi b ers list. When your Multifunction Loss Tester is the remote unit, it consequently ignores automatic save settings from the master unit.

 Add result to remote unit after FASTEST: if you select this option

and your Multifunction Loss Tester is the master unit, the result will automatically be sent and stored on the remote unit.

Note: For details about naming settings, see Setting Autonaming Scheme on

page 14.

10 FTB-3930

4 Setting Up Your Multifunction

Bare metal

(or blue border)

indicates UPC

option

Green border indicates APC

option

2 3 4

Loss Tester

Installing the EXFO Universal Interface (EUI)

The EUI fixed baseplate is available for connectors with angled (APC) or non-angled (UPC) polishing. A green border around the baseplate indicates that it is for APC-type connectors.

To install an EUI connector adapter onto the EUI baseplate:

1. Hold the EUI connector adapter so the dust cap opens downwards.

2. Close the dust cap in order to hold the connector adapter more firmly.

3. Insert the connector adapter into the baseplate.

4. While pushing firmly, turn the connector adapter clockwise on the

baseplate to lock it in place.

Multifunction Loss Tester 11

Setting Up Your Multifunction Loss Tester

Cleaning and Connecting Optical Fibers

IMPORTANT

To ensure maximum power and to avoid erroneous readings:

 Always inspect fiber ends and make sure that they are clean as

explained below before inserting them into the port. EXFO is not responsible for damage or errors caused by bad fiber cleaning or handling.

 Ensure that your patchcord has appropriate connectors. Joining

mismatched connectors will damage the ferrules.

To connect the fiber-optic cable to the port:

1. Inspect the fiber using a fiber inspection microscope. If the fiber is

clean, proceed to connecting it to the port. If the fiber is dirty, clean it as explained below.

2. Clean the fiber ends as follows:

2a. Gently wipe the fiber end with a lint-free swab dipped in isopropyl

alcohol.

2b. Use compressed air to dry completely.

2c. Visually inspect the fiber end to ensure its cleanliness.

12 FTB-3930

Setting Up Your Multifunction Loss Tester

Cleaning and Connecting Optical Fibers

3. Carefully align the connector and port to prevent the fiber end from touching the outside of the port or rubbing against other surfaces.

If your connector features a key, ensure that it is fully fitted into the port’s corresponding notch.

4. Push the connector in so that the fiber-optic cable is firmly in place, thus ensuring adequate contact.

If your connector features a screwsleeve, tighten the connector enough to firmly maintain the fiber in place. Do not overtighten, as this will damage the fiber and the port.

Note: If your fiber-optic cable is not properly aligned and/or connected, you will

notice heavy loss and reflection.

EXFO uses good quality connectors in compliance with EIA-455-21A standards.

To keep connectors clean and in good condition, EXFO strongly recommends inspecting them with a fiber inspection probe before connecting them. Failure to do so will result in permanent damage to the connectors and degradation in measurements.

Multifunction Loss Tester 13

Setting Up Your Multifunction Loss Tester

Setting Autonaming Scheme

When starting a new file, the unit suggests an initial fiber name. After adding a result to the Tes t ed fi be rs list, the unit prepares the next fiber name by incrementing the suffix.

When you manually change the name for the first time (in Power Meter,

ORL Meter or F

ASTEST), the unit then ignores autonaming settings.

IMPORTANT

To start using new autonaming settings, you must close the current file.

 Cable names: maximum 60 characters for prefix, plus 3-digit suffix

(or Microsoft Windows limitations when name is manually set)

 Fiber names: maximum 11 characters for prefix, plus 3-digit suffix

(duplicate names allowed when name is manually set)

Note: If you manually change a fiber name, then turn the unit off without saving

at least one result, this name will be discarded.

14 FTB-3930

Setting Up Your Multifunction Loss Tester

Setting Autonaming Scheme

To set the autonaming scheme:

1. From the main window, press Setup, then select the Results tab.

2. Set the names/values, then press OK.

Note: The cable name you set here will be the suggested file name when saving.

Multifunction Loss Tester 15

Setting Up Your Multifunction Loss Tester

Setting Pass/Fail Thresholds

You can define groups of thresholds to specify acceptable power (in W or dBm), power reference (in dB), F unit) and ORL values (in dB) for each wavelength.

Thresholds are supplied by system manufacturers and depend on the system deployed.

Measurements exceeding a threshold are shown with an exclamation mark. In the test tabs, these measurements also have a red background.

ASTEST loss (in dB and dB per distance

IMPORTANT

Thresholds are not saved with measurements. Results are compared to the threshold group currently associated to the file (for F results, not necessarily the master unit).

Note: When transferring results from handheld unit to computer, thresholds are

not transferred along with results.

ASTEST

16 FTB-3930

Setting Up Your Multifunction Loss Tester

Delete thresholds for selected wavelength

Default

threshold group

(applies to FasTesT,

Power Meter and

ORL Meter tabs)

Edit thresholds for selected wavelength

Add wavelength and its thresholds

Setting Pass/Fail Thresholds

To set power, loss or ORL thresholds:

1. From the button bar, press Setup, then select the Thresholds tab.

2. In the Threshold groups list, select a group to modify.

Create a new group by pressing New. Duplicate names are allowed, but you should always use distinct names to avoid confusion.

3. Select loss units (dB or dB/distance; distance units are selected in the Preferences tab). In the case of the FTB-200 v2, you can select also the power units.

Multifunction Loss Tester 17

Setting Up Your Multifunction Loss Tester

dBm power units

selected in Results tab

Watt power units

selected in Results tab

Setting Pass/Fail Thresholds

4. In the Thresholds list, select a wavelength for which you want to set thresholds, then press Edit.

Add a new wavelength to the list by pressing New. Wavelengths that are not supported by F

ASTEST are simply ignored in FASTEST result

tables.

5. In the text boxes, modify threshold values for the selected wavelength, then press OK to confirm the new thresholds (or Cancel to return to previous values).

You s ele ct F

ASTEST loss units (dB or dB/distance) on the Thresholds

tab (and distance units on the Preferences tab).

Note: For the FTB-500, you select power units on the Results tab.

6. Press OK to return to the main window.

To rename a threshold group:

1. From the Thresholds tab, select a group in the Threshold groups list.

2. Press Rename, then set the new name (maximum 64 characters) and

press OK.

18 FTB-3930

5 Measuring Power or Loss

FTB-3930

MULTITEST

Power meter port

Measured power/loss

Modulation detected

Reference power

Value under threshold

Add current value to Te s t ed f ib e r s (to actually save data, press Save on function bar)

Perform offset nulling

Set reference for

loss measurement

Display power

(W or dBm)

or loss (dB)

Change name of next saved fiber

Switch between

favorite wavelengths

The FTB-3930 Multifunction Loss Tester is equipped with an optical power meter to measure absolute power (in dBm or W) or insertion loss (in dB). The power meter port is independent of the F

The following functions are available on your power meter:

ASTEST port.

Multifunction Loss Tester 19

Measuring Power or Loss

Defining the List of Favorite Wavelengths

You must put the wavelengths you want to use on a list of favorite wavelengths. Only wavelengths selected from this list are available for measurements.

By default, the list contains 22 of the 40 calibrated wavelengths. It can contain a maximum of 30 wavelengths.

Specifications are guaranteed for calibrated wavelengths only. For other wavelengths, the unit will determine values based on the calibrated wavelengths (3-point interpolation).

Detector

Type

InGaAs



 Ge

800, 820, 830, 840, 850, 860, 870, 880, 910, 980, 1270, 1280, 1290, 1300, 1310, 1320, 1330, 1340, 1390, 1450, 1460, 1470, 1480, 1490, 1500, 1510, 1520, 1530, 1540, 1550, 1560, 1570, 1580, 1590, 1600, 1610, 1620, 1630, 1640, 1650.

 GeX All the above, plus 1370 and 1060. Same as above.

Calibrated

Wavelengths (nm)

Default Favorite

Wavelengths (nm)

800, 840, 850, 860, 910, 980, 1280, 1300, 1310, 1320, 1450, 1470, 1480, 1490, 1510, 1520, 1530, 1540, 1550, 1560,1570, 1625.

Note: The list must always contain at least one selected wavelength.

20 FTB-3930

Measuring Power or Loss

Defining the List of Favorite Wavelengths

To customize the list of favorite and selected wavelengths:

1. From the button bar, press Setup, then select the Power Meter tab.

2. Scroll through the list.

3. Press on the highlighted wavelength to select/deselect it. An X appears

beside selected wavelengths.

4. If a wavelength does not appear on the list, enter its value in the New wavelength box and press (or Add in the case of the FTB-200 v2).

You can also remove a wavelength from the list by pressing (or Delete in the case of the FTB-200 v2).

5. Repeat these steps for other wavelengths as necessary.

6. Press OK to return to the main window.

To revert to the factory-default list:

1. From the button bar, press Setup, then select the Power Meter tab.

2. Press Revert to factory settings.

Multifunction Loss Tester 21

Measuring Power or Loss

Nulling Electrical Offsets

Temperature and humidity variations affect the performance of electronic circuits and optical detectors. Nulling the electrical offsets eliminate these effects.

Your unit has been designed not to require offset nulling under normal operation, but you should perform it whenever environmental conditions

change significantly or when measuring very low power values.

IMPORTANT

Light must not reach detectors when nulling offsets. Always use an EUI or protective screw cap. Do not use a soft rubber cover.

Note: Starting a nulling automatically deactivates all light sources on the unit.

To perform an offset nulling:

1. From the main window, select the Power Meter tab.

2. Press Nulling.

3. Tighten the protective caps on the power meter and F

press OK.

The nulling process takes approximately 10 seconds. Nulling status is indicated in the data display. If light is still detected, you will need to place the caps properly and restart.

22 FTB-3930

ASTEST ports, then

Measuring Power or Loss

Reference power

Measured loss

Referencing Your Power Meter to a Source

In reference mode, your unit displays the loss created by the fiber under test only, since it subtracts a reference value from the measured power.

In the illustration, the reference value (-2.62 dBm) is subtracted from the actual power measured (-2.465 dBm).

Note: The reference value you set for each wavelength remains in memory until a

new one is set for the same wavelength, even when you turn the unit off.

Multifunction Loss Tester 23

Measuring Power or Loss

FTB-3930

MULTITEST

Light source

Power

meter

Adapter

Reference

patchcord

FTB-3930

MULTITEST

Light source

Power

meter

Adapter

Reference patchcord

Bulkhead

adapter

Reference patchcord

Referencing Your Power Meter to a Source

To reference the power meter to a source:

1. From the main window, select the Power Meter tab.

2. Check your fibers and clean them properly for optimum performance

(see Cleaning and Connecting Optical Fibers on page 12).

3. Using one of the following methods, connect a light source to the power meter port of your unit.

 One single reference patchcord

 Two reference patchcords and a bulkhead adapter

4. Activate the source at the desired wavelength.

24 FTB-3930

Measuring Power or Loss

Referencing Your Power Meter to a Source

5. Match the power meter wavelength with the source wavelength as follows:

Scroll through the Wavelength list to switch between favorite

wavelengths of your power meter (see Defining the List of Favorite

Wavelengths on page 20).

6. Scroll through the Unit list until you get dB units to retrieve the last saved reference.

Press Reference to save the current power as the new reference.

Reference power appears (in dBm) and current loss is automatically switched to dB.

7. Repeat the procedure for each wavelength you want to reference.

Multifunction Loss Tester 25

Measuring Power or Loss

Measuring absolute power or link loss is done the same way, except for the referencing step. You can take power or loss measurements and save them for further analysis.

Connect high-power live fiber to the power meter port only.

To perform power or loss measurements:

1. If necessary, perform an offset nulling (see Nulling Electrical Offsets on

page 22).

2. From the main window, select the Power Meter tab.

CAUTION

3. Check your fibers and clean them properly (see Cleaning and Connecting Optical Fibers on page 12).

4. For loss measurements, reference your power meter to a light source (see Referencing Your Power Meter to a Source on page 23), then deactivate the light source.

5. If you have used a single reference patchcord, disconnect it from the power meter port only, then attach a second reference patchcord to

the power meter.

If you have used two reference patchcords, disconnect both of them at the bulkhead.

26 FTB-3930

Measuring Power or Loss

Reference

patchcord

Reference patchcord

FTB-3930

MULTITEST

Light source

Power

meter

Adapter

Fiber

under test

Bulkhead

adapter

Bulkhead

adapter

Measuring Power or Loss

6. Using bulkhead adapters or the system patch panels, connect a fiber under test to reference patchcords attached to the light source and power meter.

7. Activate the source at the desired wavelength.

8. Match the power meter wavelength with the source wavelength as

follows:

Scroll through the Wavelength list to switch between favorite

wavelengths of your power meter (see Defining the List of Favorite

Wavelengths on page 20).

If the unit detects a modulated signal, it beeps and the signal frequency is indicated in the status bar.

9. Scroll through the Unit list to select the desired power (W or dBm) or loss (dB) unit.

Multifunction Loss Tester 27

Measuring Power or Loss

10. Add the displayed values to the Teste d fib e rs list if you want. If auto-save is activated (see Customizing Your Multifunction Loss Tester on page 9), results are automatically saved after adding them to the list.

10a.Change the displayed cable and fiber names as needed.

10b.Press Add to save the value along with wavelength, reference

power, date and time. The fiber name will increment automatically, ready to save the next value.

For details about viewing results, see Managing Test Results on page 49.

11. Repeat the procedure for other wavelengths.

28 FTB-3930

6 Measuring Optical Return Loss

FTB-3930

MULTITEST

ORL meter port

Measured ORL (positive value)

Current ORL wavelength

ORL meter sensitivity

Value under threshold

Add current value to Te s t ed f ib e r s (to actually save data, press Save on function bar)

Set reference using

ORL calibrated patchcord (best)

Set reference using

any patchcord

Change name of next saved fiber

Switch between

singlemode

wavelengths

Calibrate ORL meter

sensitivity

Optical return loss (ORL) is the total effect of multiple reflections and scattering events within a fiber-optic system.

The FTB-3930 Multifunction Loss Tester is equipped with an ORL meter to measure ORL for singlemode fibers. The ORL meter uses the F (singlemode) port only.

The following functions are available on your ORL meter:

ASTEST SM

Multifunction Loss Tester 29

Measuring Optical Return Loss

Set

ORL zero

Measure

ORL

Save

results

Perform

ORL reference

Set up thresholds

(see page 16)

Null offsets

(see page 22)

Select

wavelength

Performing ORL Reference and Setting ORL Zero Value

The ORL measurement procedure is outlined below:

Performing ORL Reference and Setting ORL Zero Value

The ORL zero measurement eliminates the effects of backreflection on the link before the component under test, so your unit displays only the backreflection of this component.

You should set a new ORL zero:

 when you change the measurement patchcord (the one connected to

the DUT, not the reference patchcord)

 when you remove a connection between the unit and mandrel

To set the ORL zero value (all wavelengths at once):

1. From the main window, select the ORL Meter tab.

2. Press ORL Zero.

30 FTB-3930

Measuring Optical Return Loss

Termination Component

under test

FTB-3930

MULTITEST

Performing ORL Reference and Setting ORL Zero Value

3. Connect a patchcord to the FASTEST SM port.

4. Terminate the fiber as close as possible before the component under

test. Wrap it at least 10 turns around a mandrel or small diameter tool, adding turns until the reading stabilizes.

5. Press OK to save the ORL zero value, then remove the termination.

To revert to the factory-default ORL zero value:

1. From the main window, select the ORL Meter tab.

2. Press Default ORL Zero.

Multifunction Loss Tester 31

Measuring Optical Return Loss

Performing and Saving ORL Measurements

You can define ORL thresholds (see Setting Pass/Fail Thresholds on page 16) before or after measuring ORL. ORL values below thresholds are displayed in red.

To m ea s ur e O R L:

1. If necessary, perform an offset nulling (see Nulling Electrical Offsets on

page 22).

2. From the main window, select the ORL Meter tab.

3. Scroll through the Wa v e length list to select a singlemode wavelength.

4. Verify your patchcords and clean them properly (see Cleaning and

Connecting Optical Fibers on page 12).

Note: If the F

EXFO’s optional ORL calibrated patchcord.

32 FTB-3930

ASTEST SM port of your unit is equipped with an APC connector, use

Measuring Optical Return Loss

Per f orming and S aving ORL Measurements

5. Connect one end of a patchcord to the FASTEST SM port of your unit leaving the other end unconnected.

6. Perform an ORL reference as follows:

Note: During the reference, the patchcord end should remain in the air;

reflections occurring at a fiber-to-air interface correspond to a constant of

14.7 dB.

Press ORL Reference.

Multifunction Loss Tester 33

Measuring Optical Return Loss

FTB-3930

MULTITEST

Te rm i n at i o nComponent

under test

Performing and Saving ORL Measurements

7. Pe rfor m an ORL zero measurement (see Performing ORL Reference and Setting ORL Zero Value on page 30).

8. Terminate the fiber as close as possible after the component under test. Wrap it at least 10 turns around a mandrel or small diameter tool, adding turns until the reading stabilizes.

Note: Avoid bending the fiber between the unit and the termination point.

The displayed value represents the ORL of the component under test.

9. Add the displayed values to the Test e d fi b ers list if you want. If auto-save is activated (see Customizing Your Multifunction Loss Tester on page 9), results are automatically saved (along with wavelength, date and time) after adding them to the list.

9a. Change the displayed cable and fiber names as needed.

9b. Press Add. The fiber name will increment automatically, ready to

save the next value.

For details about viewing results, see Managing Test Results on page 49.

10. Repeat procedure for other wavelengths if necessary.

34 FTB-3930

7 Performing Automated

FTB-3930

MULTITEST

FASTEST singlemode (SM) and multimode (MM) ports

Perform

ASTEST

Perform

reference

Save

results

Set ORL zero

(see page 30)

Null offsets

(see page 22)

Set up

ASTEST

Set up thresholds

(see page 16)

IL/ORL/Length Measurements (FasTesT)

FASTEST allows you to perform 2- or 3-wavelength bidirectional loss and ORL tests for singlemode fibers, or 2-wavelength loss tests for multimode fibers, in 10 seconds (including fiber length measurement).

ASTEST is useful in high-fiber-count installations. Activated at the touch of a

button, F

ASTEST cuts down on training time and provides error-free results.

To use F

ASTEST, you need a compatible unit (such as FTB-3930, FOT-930,

FOT-920 or FTB-3920, but not the FOT-910). The unit at the remote end is only used to establish references. It then waits for commands from the unit initiating F

The F

ASTEST (master).

ASTEST procedure is outlined below:

Multifunction Loss Tester 35

Performing Automated IL/ORL/Length Measurements (FasTesT)

Setting Up the FasTest

You can configure the FASTEST on the master unit only. The remote unit will automatically adapt to these parameters (F unit are ignored).

Setup includes the following elements:

 Port and DUT (fiber) type: multimode FASTEST will not include ORL.

 Compatibility: select FOT-930 / FTB-3930 for fast, two- or

three-wavelength testing including ORL (it requires two FOT-930/FTB-3930). Use FOT-920 / FTB-3920 when other unit is an FOT-920 or FTB-3920.

 Mode/wavelengths: select one or more wavelengths for the FASTEST.

Depending on your choice, the F measurements. Selecting FTTx Custom or FTTx All allows you to define upstream and downstream wavelengths.

 Unit location: in FTTx mode, you specify if the master unit is closer to

the CO (or to the premises) than the remote unit.

ASTEST parameters on remote

ASTEST will include loss and/or ORL

36 FTB-3930

Performing Automated IL/ORL/Length Measurements (FasTesT)

Setting Up the FasTest

To set up the FasTesT:

1. From the button bar, press Setup, then select the F

ASTEST tab.

2. Select the F

ASTEST parameters.

To revert to factory-default FasTesT settings:

1. From the button bar, press Setup, then select the F

ASTEST tab.

2. Press Revert to factory settings.

Multifunction Loss Tester 37

Performing Automated IL/ORL/Length Measurements (FasTesT)

System

under test

Connector mating

Connector

mating

System

under test

Connector mating

Referencing Units for FasTesT

Referencing subtracts the loss caused by the test setup components from the overall loss measured during F loss inserted by the system under test alone.

Two referencing methods are available:

Side-by-Side Method (Best) Loopback Method

ASTEST. The final result represents the

Description Reference taken with both units

together using their F

ASTEST ports.

Slightly more accurate value than

Reference taken separately on each unit (F

ASTEST port connected

to power meter port).

loopback method.

Location of units Must be at same location. Can be at different locations.

Loss included in

ASTEST result

Elements to consider

Loss due to system under test and one connector mating.

Includes neither an ORL reference nor an ORL zero

measurement. To obtain them,

use the ORL Meter pane (see Performing ORL Reference and

Loss due to system under test and the two connector matings.

When measuring ORL (F

ASTEST or

ORL meter), accounts for connector loss and adjusts ORL calibration accordingly.

Not recommended for short links.

Setting ORL Zero Value on page 30).

With multiple referencing, you may coordinate an FTB-3930 with up to 10 FOT-930 units.

38 FTB-3930

Performing Automated IL/ORL/Length Measurements (FasTesT)

Reference patchcord

Bulkhead

adapter

Reference patchcord

FTB-3930

MULTITEST

FTB-3930

MULTITEST

Referencing Units for FasTesT

To perform a side-by-side reference:

1. On the master unit (the one initiating the test), select the F

ASTEST tab.

2. In the Reference pane, select the Side-by-side reference type. The data display shows previous reference values (if any) for the currently connected remote unit.

IMPORTANT

With its multiple referencing feature, your unit saves the last 10 side-by-side references for each DUT type and compatibility mode.

3. Connect both units through their F

ASTEST ports, using two reference

patchcords and a bulkhead adapter.

Multifunction Loss Tester 39

Performing Automated IL/ORL/Length Measurements (FasTesT)

Serial number of unit on other side

Referencing Units for FasTesT

4. Press Take Reference. After a few seconds, the unit displays new reference values for each wavelength on both units. If values are not acceptable, try to clean connectors and repeat this step.

5. Disconnect the two patchcords from the bulkhead only and connect them to the fiber under test (using bulkhead adapters or the system patch panels).

IMPORTANT

 You can turn off the unit without losing the reference.

 If you disconnect the patchcords from the FASTEST ports, you

must take a new reference.

40 FTB-3930

Performing Automated IL/ORL/Length Measurements (FasTesT)

FTB-3930

MULTITEST

Reference patchcord

Adapter

Referencing Units for FasTesT

To perform a loopback reference:

1. On the master unit (the one initiating the test), select the F

ASTEST tab.

2. In the Reference pane, select the Loopback reference type. The data display shows previous reference values (if any).

3. Connect a reference patchcord from the F meter adapter.

ASTEST port to the power

Multifunction Loss Tester 41

Performing Automated IL/ORL/Length Measurements (FasTesT)

Referencing Units for FasTesT

4. Press Take Reference. After a few seconds, the unit displays new reference values for each wavelength. If values are not acceptable, try to clean connectors and repeat this step.

5. Disconnect the reference patchcord from the power meter adapter only and connect it to the fiber under test.

IMPORTANT

 You can turn off the unit without losing the reference.

 If you disconnect the patchcord from the FASTEST port, you must

take a new reference.

6. Repeat the procedure with the second unit.

42 FTB-3930

Performing Automated IL/ORL/Length Measurements (FasTesT)

Performing the FasTesT

Although FASTEST requires two units (one at each end of the fiber under test), you initiate it from only one (the master). Both units use F settings from the master unit.

To perform a FasTesT:

Unit A (Master) Unit B

ASTEST

1. If necessary, null the offsets (see

Nulling Electrical Offsets on page 22).

2. Clean your fibers properly (see

Cleaning and Connecting Optical Fibers on page 12).

3. Set up the F

ASTEST (see Setting Up the

FasTest on page 36).

4. If you are testing ORL, perform an ORL zero measurement from the ORL

Meter pane (see Performing ORL Reference and Setting ORL Zero Value

on page 30).

5. Reference your unit (see Referencing Units for FasTesT on page 38).

1. If necessary, null the offsets.

2. Clean your fibers properly.

3. If you are testing ORL, perform an

ORL zero measurement from the ORL Meter pane.

4. Reference your unit.

Multifunction Loss Tester 43

Performing Automated IL/ORL/Length Measurements (FasTesT)

Reference

patchcord

Fiber

under test

Reference patchcord

Bulkhead

adapter

Bulkhead

adapter

FTB-3930

MULTITEST

FTB-3930

MULTITEST

Performing the FasTesT

Unit A (Master) Unit B

6. Connect reference patchcord to fiber under test (as shown):

5. Connect reference patchcord to fiber under test (as shown):

44 FTB-3930

Performing Automated IL/ORL/Length Measurements (FasTesT)

Measured values

Calculated fiber length

Add current value to Te s te d fibers (to actually save data, press Save on function bar)

Change name of next added fiber

Indicates

unsaved results

Value unde r threshold (in red)

Indicates results not added to Tes t e d f i b er s list

Standard View

Measured values

Value unde r threshold (in red)

FTTx View

Performing the FasTesT

Unit A (Master) Unit B

7. From the button bar, press FASTEST (large green button).

The units establish communication and automated tests begin. Measurements appear on both units as they are taken.

Multifunction Loss Tester 45

Performing Automated IL/ORL/Length Measurements (FasTesT)

Performing the FasTesT

Unit A (Master) Unit B

8. Add the displayed values to the

Test e d fi b ers list if you want. If automatic save was activated for one or both units (see Customizing Your Multifunction Loss Tester on page 9), results are already added to the list.

8a. Change the displayed cable and

fiber names as needed.

8b. Press Add. The fiber name

increments automatically, ready to save the next value.

If you are not satisfied with the results, press F

ASTEST and redo the test.

46 FTB-3930

Performing Automated IL/ORL/Length Measurements (FasTesT)

Measured values

Calculated fiber length

Add current value to Te st ed fibers (to actually save data, press Save on function bar)

Change name of next added fiber

Performing the FasTesT

For details about viewing FASTEST results, see Managing Test Results on page 49.

Multifunction Loss Tester 47

8 Managing Test Results

Viewing and Deleting Results

You can save all your results (FASTEST, power/loss and ORL) on your platform, along with references and date/time of tests. You will save and recall this data according to cable names (or any Windows file name).

IMPORTANT

The date and time of FASTEST references are not saved. They are displayed with the results immediately after the test only.

Before or after saving the current file, you can view and edit results at any time (as long as a result was added to a Tes t ed fi b ers list).

To view and process test results:

From the Multifunction Loss Tester application’s main window, select the Results tab. The following functions are available when viewing results:

Multifunction Loss Tester 49

Managing Test Results

Shortcut to

result sections

Result sections

To copy all results to

Windows clipboard (for

pasting as plain text)

To select current threshold group (you can also click on section title)

To modify job or cable information (you can also click on section title)

FTB-500

To mark fiber for deletion

Click on link to edit

fiber ID or comments

To delete results for

selected (checked) fibers

Result exceeding threshold

Viewing and Deleting Results

50 FTB-3930

Managing Test Results

To modify job or cable information

To select current threshold group

To mark fiber for

deletion

FTB-200 v2

Viewing and Deleting Results

IMPORTANT

The threshold group you select will remain associated with the file, even if you change the default group. However, if you change values in the selected group, they will apply to your results.

Note: For more accuracy, the loss average is always calculated from loss values

in W and then converted to dB.

Multifunction Loss Tester 51

Managing Test Results

FTB-500

Customizing Result Display

For the FTB-500, you can customize the following elements:

 Power unit: will affect the Results tab and the printed report, but not

the different test tabs.

 Display FASTEST reference: when selected, the FASTEST references will

be shown on the Results tab.

 Custom boxes: sets the names of fields in the Edit Job Information

and Edit Cable Information windows. When you change the field

name, data in this field is kept.

For the FTB-200 v2, in the results display, you can customize the custom boxes, that set the names of fields in the Edit Job Information and Edit

Cable Information windows. When you change the field name, data in this field is kept.

You can also define default initial cable and fiber names. For details, see Setting Autonaming Scheme on page 14.

To customize the display of results:

1. From the main window, press Setup, then select the Results tab.

52 FTB-3930

2. Set parameters and press OK.

From Edit Job

Information

From Edit Cable

Information

FTB-200 v2

Managing Test Results

Customizing Result Display

Multifunction Loss Tester 53

Managing Test Results

Change default

report title

Current logo name and preview

Select logo (GIF or JPEG only)

Select information

to include

in report

Display report preview

Obtain help

about reports

Customizing and Printing Reports (FTB-500)

The FTB-3930 Multifunction Loss Tester application allows you to print detailed reports including your custom selection of OLTS data (F ORL and power results with cable and job information).

ASTEST,

Note: Saving a report including all items, a default title and no logo is equivalent

54 FTB-3930

You can also save the report as an HTML or XML file to view or print it later using any HTML or XML browser.

to using the Save As button to save as HTML in the main window.

When you select information to include, consider the following:

 System Information and Job Information contain details from the

Job Information section.

 FasTesT includes values from the Loss pane (except for references)

and ORL pane (except for manual ORL values).

 Results exceeding thresholds are indicated with a “!”.

Managing Test Results

Customizing and Printing Reports (FTB-500)

To print a report:

1. From the main window, press Print.

2. Enter a report title and press Browse to select a logo if desired.

3. Select items to include in the report, as follows:

 To add or remove an item, check or clear the corresponding box.

 To add all items, press Select All.

 To remove all items, press Clear All.

4. If desired, press Preview to view the report before printing.

5. Press Print. For information about printer parameters, refer to your

printer’s user guide or to the Microsoft Windows documentation.

To save a report to a file:

1. Perform steps 1 to 4 in the above procedure.

2. Press Save Report, then select a name and file format (HTML or XML).

Multifunction Loss Tester 55

9 Using a Light Source

FTB-3930

MULTITEST

Source singlemode (SM) and multimode (MM) ports

Your unit may contain two source ports: a 2- or 3-wavelength singlemode port and a 2-wavelength multimode port, depending on the configuration.

The source signal can be continuous (CW or high-power) or modulated (270 Hz, 1 kHz or 2 kHz) and uses the F

 CW signal (the default): constant power over the temperature range,

but about 3 dB lower than maximum.

 High-power signal: reaches maximum power, but its power slightly

varies over the temperature range.

WARNING

When a source is active, its port emits invisible laser radiation. Avoid exposure and do not stare directly into the beam. Ensure that any unused port is properly protected with a cap.

ASTEST ports.

 If you switch to power meter or ORL meter, a Source status pane is

always displayed.

 When you switch sources, the modulation remains the same. It is

indicated in the data display.

 Only one source/wavelength may be active at a time. The active port

(SM or MM) is indicated in the data display.

 The source status is indicated with a LED in the status bar and on the

platform front panel.

Note: The platform front panel always shows the source, VFL, ORL meter or talk

set port status (even when you use other applications).

Multifunction Loss Tester 57

Using a Light Source

Data display

Status LED

Power switch

To activate a light source:

1. Connect the fiber under test to the source port (see Cleaning and

Connecting Optical Fibers on page 12).

2. From the main window, select the Source/VFL tab (units with a VFL) or the Source tab (units with no VFL).

58 FTB-3930

Using a Light Source

Power button

Data display

Status LED

FTB-200 v2

3. In the Source pane, select a wavelength using the Wa v e l e n gth dial (Use the + and - buttons in the case of the FTB-200 v2 platform).

4. Slide the Power switch to On (or press the On/Off button in the case of the FTB-200 v2 platform).

To deactivate a light source:

Slide the Power switch to Off (or press the On/Off button in the case of the FTB-200 v2 platform).

To change the signal modulation:

1. Activate the source if you want.

2. Select a modulation using the Modulation dial (Use the + and -

buttons in the case of the FTB-200 v2 platform).

Multifunction Loss Tester 59

10 Identifying Fiber Faults

FTB-3930

MULTITEST

Visual fault locator (VFL) port

Visually

The visual fault locator (VFL) helps you identify bends, faulty connectors, splices and other causes of signal loss.

From its dedicated port, the VFL emits a red signal which becomes visible at the location of a fault on the fiber. This signal can be continuous (CW, the default) or blinking (1 Hz).

WARNING

When the VFL is active, the VFL port emits visible laser radiation. Avoid exposure and do not stare directly into the beam. Ensure that any unused port is properly protected with a cap.

 If you switch to power meter or ORL meter, a VFL status pane is always

displayed.

 The VFL status is indicated with a LED in the status bar and on the

platform front panel.

Note: The platform front panel always shows the source, VFL, ORL meter or talk

set port status (even when you use other applications).

Multifunction Loss Tester 61

Identifying Fiber Faults Visually

Data display

Status LED

Power switch

To activate the VFL and inspect a fiber:

1. Connect the fiber under test to the VFL port (see Cleaning and

Connecting Optical Fibers on page 12).

2. From the main window, select the Source/VFL tab.

3. In the VFL pane, slide the Power switch to On.

4. To switch between blinking (1 Hz) and continuous (CW) signals, use

the Modulation dial.

5. Without looking directly into the beam, examine the fiber. If light is coming out of the rubber jacket or on the side of the ferrule, the fiber is defective.

6. Deactivate the VFL by sliding the Power switch to Off.

62 FTB-3930

11 Communicating with Other

Users

Your Multifunction Loss Tester offers two ways to communicate:

 text messages

 voice (via the optional talk set)

Sending and Receiving Text Messages

To facilitate communication between opposite ends of a fiber (especially on models with no talk set), you may send text messages to compatible units (such as FOT-930, FTB-3930, FOT-920 or FTB-3920) through their

ASTEST ports.

It is possible to send a predefined message or to write one of your own (maximum 30 characters). However, custom messages are not kept in memory.

IMPORTANT

 The messaging feature does not work with the talk set port.

 The messaging feature will not work if both units try to send a

message at the same time.

 You cannot use other features while sending or receiving a

message.

 You cannot cancel the operation.

To send a text message:

1. Connect the units at each end of the same fiber via their F

Multifunction Loss Tester 63

ASTEST ports.

Communicating with Other Users

FTB-3930

MULTITEST

List of sent

and received

messages

Status display

(with port)

Sending and Receiving Text Messages

2. From the main window, select the Talk set/Messages tab (units with a talk set) or the Messages tab (units with no talk set and FTB-200 v2 units).

64 FTB-3930

Communicating with Other Users

Sending and Receiving Text Messages

3. Ensure that the port indicated (SM or MM) is the one you use. Otherwise, do as follows:

3a. In the function bar, press Setup, then select the F

3b. Change the F

ASTEST port, then return to the Messages pane.

ASTEST tab.

4. Scroll through the Predefined messages list and select a message.

Enter a custom message in the New message text box.

5. Press the Send button next to your type of message (predefined or new).

After a few seconds, your message will automatically appear on the receiving unit (if its Multifunction Loss Tester application runs) and on the Message log pane. If an incompatible unit (or no unit) is detected at the other end, or if the F

ASTEST port of the receiving unit is in use, an error

message will appear.

When you receive a message:

Your unit emits a short beep and displays the received message.

 Press Close to clear the display and return to your previous function.

 Press Reply to access the Messages tab and reply to the message. You

will then need to return to your previous function manually. However, your last readings will be lost.

Note: If the message was written with a language not supported by your unit, you

will see unreadable characters only.

Multifunction Loss Tester 65

Communicating with Other Users

FTB-3930

MULTITEST

Tal k s et p o rt

Communicating by Voice

With the optional talk set, you can establish full-duplex digital voice communication over a dedicated fiber, even while other functions are in use.

The talk set provides adjustable headset volume and uses a dedicated port. It is not compatible with the FOT-920 or FTB-3920 talk sets.

Note: You may use any commercially available headset equipped with a

microphone. It is also compatible with the GP-92B speakerphone.

While communication is established, the actions and displays of each unit may differ as follows:

 You can send or receive a call at any time, except during a FASTEST. To

receive a call, you must be running the Multifunction Loss Tester application.

 Once communication is established, it will be maintained even if you

use the unit’s other test tools (including F

 If communication is lost, calling unit will automatically try to

ASTEST).

reestablish communication.

66 FTB-3930

Communicating with Other Users

FTB-3930

MULTITEST

Headset volume

Status display

Communicating by Voice

To communicate between units:

Calling Unit Receiving Unit

1. Connect the calling unit to one end of the fiber via its talk set port, and plug in your headset.

2. From the main window, select the Talk set/Messages tab (Messages tab

for the FTB-200 v2 unit).

1. Connect the receiving unit to the other end of the fiber via its talk set port, and plug in your headset.

Multifunction Loss Tester 67

Communicating with Other Users

Communicating by Voice

Calling Unit Receiving Unit

3. Press Talk . Your unit establishes communication with receiving unit.

When receiving the call, the unit beeps. A phone icon appears to indicate that communication is established.

If no compatible unit is detected at the other end, a message appears.

4. Talk to the receiving unit. 2. Simply answer (no need to press a

key).

5. To end the communication, press End from the Talk set pane.

3. To end the communication, press End from the Talk se t pane.

To adjust the headset volume (calling or receiving unit):

From the Ta lk set pane, move the Headset volume slider to the top (volume increase) or to the bottom (volume decrease).

You cannot adjust or mute the ring sound.

68 FTB-3930

12 Maintenance

To help ensure long, trouble-free operation:

 Always inspect fiber-optic connectors before using them and clean

them if necessary.

 Keep the unit free of dust.

 Clean the unit casing and front panel with a cloth slightly dampened

with water.

 Store unit at room temperature in a clean and dry area. Keep the unit

out of direct sunlight.

 Avoid high humidity or significant temperature fluctuations.

 Avoid unnecessary shocks and vibrations.

 If any liquids are spilled on or into the unit, turn off the power

immediately, disconnect from any external power source, remove the batteries and let the unit dry completely.

WARNING

Cleaning EUI Connectors

Regular cleaning of EUI connectors will help maintain optimum performance. There is no need to disassemble the unit.

IMPORTANT

If any damage occurs to internal connectors, the module casing will have to be opened and a new calibration will be required.

Multifunction Loss Tester 69

Maintenance

Push

Tur n

Pull

Cleaning EUI Connectors

Looking into the optical connector while the light source is active WILL result in permanent eye damage. EXFO strongly recommends to TURN OFF the unit before proceeding with the cleaning procedure.

To clean EUI connectors:

1. Remove the EUI from the instrument to expose the connector

baseplate and ferrule.

2. Moisten a 2.5 mm cleaning tip with one drop of isopropyl alcohol (alcohol may leave traces if used abundantly).

WARNING

3. Slowly insert the cleaning tip into the EUI adapter until it comes out on the other side (a slow clockwise rotating movement may help).

4. Gently turn the cleaning tip one full turn, then continue to turn as you withdraw it.

5. Repeat steps 3 to 4 with a dry cleaning tip.

Note: Make sure you don’t touch the soft end of the cleaning tip.

70 FTB-3930

Maintenance

Cleaning EUI Connectors

6. Clean the ferrule in the connector port as follows:

6a. Deposit one drop of isopropyl alcohol on a lint-free wiping cloth.

IMPORTANT

Isopropyl alcohol may leave residues if used abundantly or left to evaporate (about 10 seconds).

Avoid contact between the tip of the bottle and the wiping cloth, and dry the surface quickly.

6b. Gently wipe the connector and ferrule.

6c. With a dry lint-free wiping cloth, gently wipe the same surfaces to

ensure that the connector and ferrule are perfectly dry.

6d. Verify connector surface with a portable fiber-optic microscope

(for example, EXFO’s FOMS) or fiber inspection probe (for example, EXFO’s FIP).

7. Put the EUI back onto the instrument (push and turn clockwise).

8. Throw out cleaning tips and wiping cloths after one use.

Multifunction Loss Tester 71

Maintenance

Cleaning Detector Ports

Regular cleaning of detectors will help maintain measurement accuracy.

Always cover detectors with protective caps when unit is not in use.

To clean detector ports:

1. Remove the protective cap and adapter (FOA) from the detector.

2. If the detector is dusty, blow dry with compressed air.

3. Being careful not to touch the soft end of the swab, moisten a cleaning

tip with only one drop of isopropyl alcohol.

Alcohol may leave traces if used abundantly. Do not use bottles that distribute too much alcohol at a time.

IMPORTANT

4. While applying light pressure (to avoid breaking the detector window), gently rotate the cleaning tip on the detector window.

5. Repeat step 4 with a dry cleaning tip or blow dry with compressed air.

6. Discard the cleaning tips after one use.

72 FTB-3930

Maintenance

Cleaning VFL-Type Connectors

VFL-type connectors are fixed on your unit and can be cleaned using a mechanical cleaner.

WARNING

Verifying the surface of the connector with a fiber-optic microscope WHILE THE UNIT IS ACTIVE WILL result in permanent eye damage.

To clean a connector using a mechanical cleaner:

1. Insert the mechanical into the optical adapter, and push the outer shell

into the cleaner.

Note: The cleaner makes a clicking sound to indicate that the cleaning is done.

2. Verify connector surface with a portable fiber-optic microscope (for

example, EXFO’s FOMS) or fiber inspection probe (for example, EXFO’s FIP).

WARNING

Only use an EXFO battery. Batteries from other suppliers could result in serious damage to your unit, or personal injuries. Contact EXFO for more information.

Multifunction Loss Tester 73

Maintenance

Recalibrating the Unit

Do not throw batteries into fire or water and do not short-circuit the batteries’ electrical contacts. Do not disassemble.

Recalibrating the Unit

EXFO manufacturing and service center calibrations are based on the ISO/IEC 17025 standard (General Requirements for the Competence of Testing and Calibration Laboratories). This standard states that calibration documents must not contain a calibration interval and that the user is responsible for determining the re-calibration date according to the actual use of the instrument.

The validity of specifications depends on operating conditions. For example, the calibration validity period can be longer or shorter depending on the intensity of use, environmental conditions and unit maintenance, as well as the specific requirements for your application. All of these elements must be taken into consideration when determining the appropriate calibration interval of this particular EXFO unit.

WARNING

Under normal use, the recommended interval for your FTB-3930 Multifunction Loss Tester is: one year.

For newly delivered units, EXFO has determined that the storage of this product for up to six months between calibration and shipment does not affect its performance (EXFO Policy PL-03).

74 FTB-3930

Maintenance

Recycling and Disposal (Applies to European Union Only)

To help you with calibration follow-up, EXFO provides a special calibration label that complies with the ISO/IEC 17025 standard and indicates the unit calibration date and provides space to indicate the due date. Unless you have already established a specific calibration interval based on your own empirical data and requirements, EXFO would recommend that the next calibration date be established according to the following equation:

Next calibration date = Date of first usage (if less than six months after the calibration date) + Recommended calibration period (one year)

To ensure that your unit conforms to the published specifications, calibration may be carried out at an EXFO service center or, depending on the product, at one of EXFO’s certified service centers. Calibrations at EXFO are performed using standards traceable to national metrology institutes.

Note: You may have purchased a FlexCare plan that covers calibrations. See the

Service and Repairs section of this user documentation for more information on how to contact the service centers and to see if your plan qualifies.

Note: The FlexCare warranty program includes Calibration/Verification packages

(see Service and Repairs on page 85).

Recycling and Disposal (Applies to European Union Only)

For complete recycling/disposal information as per European Directive WEEE 2012/19/UE, visit the EXFO Web site at www.exfo.com/recycle.

Multifunction Loss Tester 75

13 Troubleshooting

Solving Common Problems

Problem Possible Cause Solution

During offset nulling, you get the following message:

“Light detected during nulling.”

When using the power meter, you get Power Too Low or Power Too High.

When measuring ORL, you get Too M u c h Po wer.

When measuring ORL, you get ORL exceeds.

Light reaches at least one detector (power meter or

ASTEST).

Power of the signal received at the power meter port is outside its measurement range.

Measured reflected power is higher than emitted power. The ORL reference is incorrect.

Reflection is below sensitivity of ORL meter.

Ensure protective caps are tightly screwed on F and power meter ports and perform the nulling again.

Do not use rubber cover.

Check the connections. Ensure you use the proper fiber and connector type and that you use your power meter within specifications.

Always perform ORL reference before each ORL measurement.

Perfo r m an ORL z e r o measurement to increase the sensitivity of the detector.

Ensure mandrel is correct and that patchcord and connectors are in good condition.

ASTEST

Multifunction Loss Tester 77

Troubleshooting

Solving Common Problems

Problem Possible Cause Solution

Unable to establish FASTEST communication.

During F

ASTEST, you get a

message saying that loopback reference was not performed.

ORL values are inaccurate for short fibers at 1310 nm during a F

ASTEST.

 Remote unit’s FASTEST

port is in use.

 Remote unit is not

compatible.

 Selected port on master

unit differs from actual port to which fiber is connected.

 Compatibility set to

FOT-930 / FTB-3930 but remote unit is not an FOT-930 or FTB-3930.

Loopback reference was selected, but not performed (or reference is outdated).

— Measure ORL manually.

 Wait until FASTEST

completes, turn source and ORL meter off or exit Probe mode (FOT-930).

 Make sure remote unit

isan FOT-930, FTB-3930, FOT-920 or FTB-3920.

 Set the port (SM or MM)

correctlyin Setup (F

ASTEST

tab) on master unit.

 Set the compatibility to

FOT-920 / FTB-3920 in Setup (F

ASTEST tab) on

master unit.

Perform a loopback reference before F

ASTEST measurement.

Unable to communicate with an FOT-920 using the talk set.

Unable to establish connection with

Talk sets of the FOT-920 and FOT-930/FTB-3930 are not compatible.

Probe mode is activated on remote unit(FOT-930 only).

Use text messaging instead.

Deactivate Probe mode.

compatible talk set.

78 FTB-3930

Troubleshooting

Solving Common Problems

Problem Possible Cause Solution

Unable to send a text message.

On Results tab, a box indicates “Invld” instead of a numerical value.

On Results tab, a box indicates “- - - -” instead of a numerical value.

When printing a report, rightmost columns are not printed.

 Selected port differs

from actual port to which fiber is connected.

 Receiving unit’s port is

in use.

 Remote unit is not

compatible.

The application is unable to calculate the F

ASTEST ORL

value (e.g., at 1310 nm for short fibers).

The calculated value makes no sense (e.g., negative ORL value).

The Fiber ID column is too wide. The width of this column is determined with the widest name.

 On the sending unit, set

the correct port (SM or MM) in Setup (F

ASTEST

tab).

 Wait until FASTEST

completes, turn source and ORL meter off or exit Probe mode (FOT-930).

 Make sure remote unit is

an FOT-930, FTB-3930, FOT-920 or FTB-3920.

Perform the measurements again.

Perform the measurements again. Note that the calculated value is usually shown on the printed report.

Rename fiber IDs that have a long name.

When saving data in text formats, some ORL values are higher than the indicated sensitivity.

Multifunction Loss Tester 79

Saved text files containing symbols such as “>” may not open properly in some applications.

The actual measured value is used instead, even if it is not accurate.

Troubleshooting

Obtaining Online Help

Context-sensitive and interactive help is conveniently available at all times to guide you through the use of your application.

Note: You will also find a printable PDF version of the FTB-3930 Multifunction

Loss Tester user guide on your installation CD.

To access online help:

Anywhere in the application, press the button (or F1 on a keyboard) to get help about the current function.

Press About in the button bar, then press User Guide.

80 FTB-3930

Troubleshooting

Contacting the Technical Support Group

To obtain after-sales service or technical support for this product, contact EXFO at one of the following numbers. The Technical Support Group is available to take your calls from Monday to Friday, 8:00 a.m. to 7:00 p.m. (Eastern Time in North America).

Technical Support Group

400 Godin Avenue Quebec (Quebec) G1M 2K2 CANADA

For detailed information about technical support, and for a list of other worldwide locations, visit the EXFO Web site at www.exfo.com.

If you have comments or suggestions about this user documentation, you can send them to customer.feedback.manual@exfo.com.

To accelerate the process, please have information such as the name and the serial number (see the product identification label), as well as a description of your problem, close at hand.

1 866 683-0155 (USA and Canada) Tel.: 1 418 683-5498 Fax: 1 418 683-9224 support@exfo.com

You may also be requested to provide software and module version numbers.This information, as well as technical support contact information, can be found by clicking About in the function bar

Multifunction Loss Tester 81

Troubleshooting

Transportation

Maintain a temperature range within specifications when transporting the unit. Transportation damage can occur from improper handling. The following steps are recommended to minimize the possibility of damage:

 Pack the unit in its original packing material when shipping.

 Avoid high humidity or large temperature fluctuations.

 Keep the unit out of direct sunlight.

 Avoid unnecessary shocks and vibrations.

82 FTB-3930

14 Warranty

General Information

EXFO Inc. (EXFO) warrants this equipment against defects in material and workmanship for a period of three years from the date of original shipment. EXFO also warrants that this equipment will meet applicable specifications under normal use.

During the warranty period, EXFO will, at its discretion, repair, replace, or issue credit for any defective product, as well as verify and adjust the product free of charge should the equipment need to be repaired or if the original calibration is erroneous. If the equipment is sent back for verification of calibration during the warranty period and found to meet all published specifications, EXFO will charge standard calibration fees.

The warranty can become null and void if:

 unit has been tampered with, repaired, or worked upon by

unauthorized individuals or non-EXFO personnel.

 warranty sticker has been removed.

IMPORTANT

 case screws, other than those specified in this guide, have been

removed.

 case has been opened, other than as explained in this guide.

 unit serial number has been altered, erased, or removed.

 unit has been misused, neglected, or damaged by accident.

THIS WARRANTY IS IN LIEU OF ALL OTHER WARRANTIES EXPRESSED, IMPLIED, OR STATUTORY, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL EXFO BE LIABLE FOR SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES.

Multifunction Loss Tester 83

Warranty

Liability

EXFO shall not be liable for damages resulting from the use of the product, nor shall be responsible for any failure in the performance of other items to which the product is connected or the operation of any system of which the product may be a part.

EXFO shall not be liable for damages resulting from improper usage or unauthorized modification of the product, its accompanying accessories and software.

Exclusions

EXFO reserves the right to make changes in the design or construction of any of its products at any time without incurring obligation to make any changes whatsoever on units purchased. Accessories, including but not limited to fuses, pilot lamps, batteries and universal interfaces (EUI) used with EXFO products are not covered by this warranty.

This warranty excludes failure resulting from: improper use or installation, normal wear and tear, accident, abuse, neglect, fire, water, lightning or other acts of nature, causes external to the product or other factors beyond the control of EXFO.

IMPORTANT

In the case of products equipped with optical connectors, EXFO will charge a fee for replacing connectors that were damaged due to misuse or bad cleaning.

Certification

EXFO certifies that this equipment met its published specifications at the time of shipment from the factory.

84 FTB-3930

Warranty

Service and Repairs

EXFO commits to providing product service and repair for five years following the date of purchase.

To send any equipment for service or repair:

1. Call one of EXFO’s authorized service centers (see EXFO Service

Centers Worldwide on page 86). Support personnel will determine if the equipment requires service, repair, or calibration.

2. If equipment must be returned to EXFO or an authorized service center, support personnel will issue a Return Merchandise Authorization (RMA) number and provide an address for return.

3. If possible, back up your data before sending the unit for repair.

4. Pack the equipment in its original shipping material. Be sure to include

a statement or report fully detailing the defect and the conditions under which it was observed.

5. Return the equipment, prepaid, to the address given to you by support personnel. Be sure to write the RMA number on the shipping slip. EXFO

will refuse and return any package that does not bear an RMA number.

Note: A test setup fee will apply to any returned unit that, after test, is found to

meet the applicable specifications.

After repair, the equipment will be returned with a repair report. If the equipment is not under warranty, you will be invoiced for the cost appearing on this report. EXFO will pay return-to-customer shipping costs for equipment under warranty. Shipping insurance is at your expense.

Routine recalibration is not included in any of the warranty plans. Since calibrations/verifications are not covered by the basic or extended warranties, you may elect to purchase FlexCare Calibration/Verification Packages for a definite period of time. Contact an authorized service center (see EXFO Service Centers Worldwide on page 86).

Multifunction Loss Tester 85

Warranty

EXFO Service Centers Worldwide

If your product requires servicing, contact your nearest authorized service center.

EXFO Headquarters Service Center

400 Godin Avenue Quebec (Quebec) G1M 2K2 CANADA

EXFO Europe Service Center

Winchester House, School Lane Chandlers Ford, Hampshire S053 4DG ENGLAND

EXFO Telecom Equipment (Shenzhen) Ltd.

3rd Floor, Building 10, Yu Sheng Industrial Park (Gu Shu Crossing), No. 467, National Highway 107, Xixiang, Bao An District, Shenzhen, China, 518126

1 866 683-0155 (USA and Canada) Tel.: 1 418 683-5498 Fax: 1 418 683-9224 support@exfo.com

Tel.: +44 2380 246800 Fax: +44 2380 246801 support.europe@exfo.com

Tel: +86 (755) 2955 3100 Fax: +86 (755) 2955 3101 support.asia@exfo.com

86 FTB-3930

A Technical Specifications

TECHNICAL SPECIFICATIONS

External Power Meter FTB-3932 FTB-3932X FTB-3933

Detector type Ge GeX InGaAs

Measurement range (dBm) 10 to –70 26 to –55 6 to –73

Uncertainty

b, c

± 5 % ± 0.1 nW ± 5 % ± 3 nW ± 5 % ± 0.05 nW

Wavelength range (nm) 800 to 1650 800 to 1650 800 to 1650

Display resolution

(dB) 0.01 0.01 0.01

Calibrated wavelengths 40 42 40

Recommended recalibration period (years)

333

Automatic offset nulling

Yes Yes Yes

Measurement-distance units kilometers, meters, kilofeet, feet, miles

Sources Standard –4 –5 –12C (second port) –12D (second port)

Wavelengths

(nm) 1310 ± 20

1550 ± 20

1310 ± 20 1550 ± 20 1625 ± 10

1310 ± 20 1490 ± 10 1550 ± 20

850 ± 25 1300 +50/–20

Emitter type Laser Laser Laser LED LED

Minimum output power

(dBm) –1/–1 –1/–4/–7 –1/–7/–4

–27/–27 (50/125 μm) i–21/–21 (62.5/125 μm)

Spectral width f (nm) ) 5/) 5 ) 5/) 5/) 5 ) 5/) 5/) 5 50/135 50/135

Stability

(8 hours) (dB) ± 0.05 ± 0.05 ± 0.05 ± 0.05 ± 0.05

FasTesT Standard –4 –5 –12C (second port) –12D (second port)

Wavelengths (nm) 1310

1550

1310 1550 1625

1310 1490 1550

850 1300

Loss range

(dB) 60 56 56 40 46

Loss precision

(repeatability) (dB)

side-by-side loopback

0.15

0.25

0.15

0.25

0.15

0.25

0.15

0.25

0.15

0.25

Length measurement range (km)

200 200 200 5 5

Length measurement uncertainty (typical)

± (10 m + 1 % x length)

IMPORTANT

The following technical specifications can change without notice. The information presented in this section is provided as a reference only. To obtain this product’s most recent technical specifications, visit the EXFO Web site at www.exfo.com.

Multifunction Loss Tester 87

Technical Specifications

Notes

a. At 23 °C ± 1 °C and 1550 nm with FC connector and on batteries, unless otherwise specified. b. Resolution, uncertainty and linearity are functions of input power; uncertainty is valid at calibration conditions. c. Up to 20 dBm for GeX. d. Power of > –45 dBm for Ge, > –30 dBm for GeX and > –47 dBm for InGaAs. e. In High source mode. f. As defined by Telcordia TR-TSY-000887, rms for lasers and at –3 dB for LEDs; typical values for LEDs. g. After a warmup time of 6 minutes, in CW source mode. h. Typical value, at 1550 nm for SM and 850 nm for MM. i. Typical value. j. For fiber length ) 120 km. k. For graded-index MM fibers; typical.

SPECIFICATIONS

Dedicated ORL Wavelengths All SM Talk Set VFL

ORL range (APC / UPC) (dB) 65/55 Emitter type Laser Emitter type Laser

ORL uncertainty

(dB) ± 0.5 Wavelength (nm) 1550 ± 20 Wavelength (nm) 650

Resolution

(dB) 0.01 Dynamic range at 1550 nm (dB)

Output power (dBm)

Dynamic range MM k (dB)

GENERAL SPECIFICATIONS

Size (H x W x D) 96 mm x 25 mm x 260 mm (3 3/4 in x 1 in x 10 1/4 in)

Weight 0.5 kg (1.1 lb)

Temperature

Operating Storage

0 °C to 50 °C (32 °F to 122 °F) –40 °C to 70 °C (–40 °F to 158 °F)

Relative humidity 0% to 95% non-condensing

Warranty (years) 3

88 FTB-3930

Index

! .................................................................. 16

About button .............................................. 81

after-sales service ........................................ 81

analyzing results............................................ 3

applications, typical ...................................... 3

autonaming, MultiTest.......................... 10, 14

backreflection measurement ....................... 32

cable and fiber names ................................. 14

calibrated wavelengths ................................. 2

cancelling dark current effects .................... 22

caution

of personal hazard................................... 4

of product hazard.................................... 4

certification information ................................v

circuit performance ..................................... 22

cleaning

detector ports........................................ 72

EUI connectors....................................... 69

fiber ends .............................................. 12

front panel............................................. 69

VFL connectors ...................................... 73

color, data display......................................... 9

communication

talk set................................................... 66

text messages ........................................ 63

component under test. see DUT configuring

application..........................................9–17

printer ................................................... 55

connector cleaner........................................ 73

Index

connectors, cleaning.................................... 69

connectors, illustration of.......................... 1–3

conventions, safety........................................ 4

creating test report...................................... 54

customer service.......................................... 85

customizing test report ...............................54

dark current effects, eliminating.................. 22

data

printing.................................................. 54

transferring.............................................. 3

description

ORL meter.............................................. 29

power meter .......................................... 19

detection, modulation................................... 2

detector

types ........................................................ 2

EXFO FTB-3930 User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

FTB-3930

Certification Information

Main Features

Typical Applications

Conventions

2 Safety Information

Other Safety Symbols on Your Unit

Laser Safety Information (Units without VFL)

Laser Safety Information (Units with VFL)

Electrical Safety Information

Installing the EXFO Universal Interface (EUI)

Cleaning and Connecting Optical Fibers

Setting Autonaming Scheme

Setting Pass/Fail Thresholds

5 Measuring Power or Loss

Defining the List of Favorite Wavelengths

Nulling Electrical Offsets

Referencing Your Power Meter to a Source

Measuring Power or Loss

6 Measuring Optical Return Loss

Performing ORL Reference and Setting ORL Zero Value

Performing and Saving ORL Measurements

Setting Up the FasTest

Referencing Units for FasTesT

Performing the FasTesT

8 Managing Test Results

Viewing and Deleting Results

Customizing Result Display

Customizing and Printing Reports (FTB-500)

9 Using a Light Source

Sending and Receiving Text Messages

Communicating by Voice

12 Maintenance

Cleaning EUI Connectors

Cleaning Detector Ports

Cleaning VFL-Type Connectors

Recalibrating the Unit

Recycling and Disposal (Applies to European Union Only)

13 Troubleshooting

Solving Common Problems

Obtaining Online Help

Contacting the Technical Support Group

Transportation

14 Warranty

General Information

Liability

Exclusions

Certification

Service and Repairs

EXFO Service Centers Worldwide

A Technical Specifications

Index