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: 8.0.0
iiFOT-930
Page 3
Contents
Contents
Certification Information ....................................................................................................... vi
1 Introducing the FOT-930 Multifunction Loss Tester ................................... 1
Main Features .........................................................................................................................1
Power Sources ........................................................................................................................4
Service and Repairs ...............................................................................................................91
EXFO Service Centers Worldwide ..........................................................................................92
ivFOT-930
Page 5
Contents
A Technical Specifications ............................................................................. 93
Index ................................................................................................................ 95
Multifunction Loss Testerv
Page 6
Certification Information
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.
viFOT-930
Page 7
DECLARATION OF CONFORMITY
Application of Council Directive(s): 1999/5/EC – The R&TTE Directive
2011/65/UE – Restriction of the use of certain hazardous substances (RoHS)
And their amendments
Manufacturer’s Name and Address:
EXFO Inc. EXFO Europe Ltd.
400 Godin Avenue Winchester House
Quebec City, Quebec School Lane, Chandlers Ford
G1M 2K2, CANADA SO53 4DG, UK
Tel.: +1 418 683-0211 Tel.: +44 2380 246 800
Equipment Type/Environment: Test & Measurement / Industrial
Trade Name/Model No.: Multifunction Loss Tester—FOT-930 MaxTester
Standard(s) to which Conformity is declared:
EN 61010-1:2010 Edition 3.0
Safety requirements for electrical equipment for measurement,
control, and laboratory use
– Part 1: General requirements
EN 61326-1:2006
Electrical equipment for measurement, control and laboratory use –
EMC requirements
– Part 1: General requirements
EN 60825-1:2007 Edition 2.0
Safety of laser products – Part 1: Equipment classification and
requirements
I, the undersigned, hereby declare that the equipment specified above conforms to the above Directive and Standards.
Manufacturer:
Stephen Bull, E. Eng
Vice-President Research and Development
400 Godin Avenue,
Quebec City, Quebec
G1M 2K2 CANADA
January 31, 2013
Certification Information
Multifunction Loss Testervii
Page 8
Page 9
1Introducing the FOT-930
DC connector
Battery charge
status LEDs
RS-232 connector
Shoulder strap eyelet
Stand
Display
Keypad
Multifunction Loss Tester
The FOT-930 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.
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
Multifunction Loss Tester1
Automatic wavelength detection from compatible sources
No offset nulling required in normal operation
Page 10
Introducing the FOT-930 Multifunction Loss Tester
Headset connector
Inspection probe
connector
Ta l k set p o rt
Power meter detector port
Visual fault locator port
and soft cap
Singlemode port (F
ASTEST, light
source and ORL meter)
Multimode port
(F
ASTEST and light source)
Main Features
Note: Optical ports and connectors may differ from the illustration.
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
ASTEST only.
Modulated or high-power signal compatible with other EXFO units
2FOT-930
Page 11
Introducing the FOT-930 Multifunction Loss Tester
Safety label and serial number
(under the stand)
Battery compartment
(two rechargeable batteries)
Quick reference labels
Main Features
Other test utilities:
Text messaging
Full-duplex digital talk set (optional)
Visual fault locator to inspect or identify fibers (optional)
Video fiber inspection probe (optional)
Result processing and analysis features (also available in the Optical
Report Viewer application):
Customizable test thresholds with visual pass/fail analysis
Memory for 1024 results and possible data transfer to a computer for
analysis with the Optical Report Viewer software
FASTEST results displayed according to FTTx usage and terminology
Other useful characteristics:
Energy-saving features: automatic backlight or unit shutdown
Multilingual graphical user interface
Comprehensive online help available from each function and Quick
Reference labels affixed to back of unit
Multifunction Loss Tester3
Page 12
Introducing the FOT-930 Multifunction Loss Tester
Pow er So urces
Power Sources
The unit operates with the following power sources:
AC adapter/charger (connected to standard power outlet—indoor use
only). Compatible car outlet adapter available upon request
One or two Lithium-Ion rechargeable batteries (automatically take
over if you unplug the AC adapter/charger)
Field-changeable without affecting operation
Automatic recharge when AC adapter/charger connected
CR2032-type Lithium cell battery (for clock only, used when
Lithium-Ion batteries and DC power are both unavailable)
IMPORTANT
Batteries are not charged at the factory. Fully charge them (about
4 hours) before using the unit for the first time.
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
4FOT-930
Page 13
Introducing the FOT-930 Multifunction Loss Tester
Conventions
Conventions
Before using the product described in this manual, 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.
Multifunction Loss Tester5
Page 14
Page 15
2Safety 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 other than those
specified herein may result in exposure to hazardous situations 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 Tester7
Page 16
Safety Information
Other Safety Symbols on Your Unit
Other Safety Symbols on Your Unit
One or more of the following symbols may also appear on your unit.
SymbolMeaning
Direct current
Alternating current
Both direct and 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)
8FOT-930
Page 17
Safety Information
Affixed to back
(under the stand)
Indicated on
connector panel
Laser Safety Information (Units without VFL)
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:
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:
Multifunction Loss Tester9
Page 18
Safety Information
Electrical Safety Information
Electrical Safety Information
The AC adapter/charger provided with this unit is specifically designed to
work with your product.
Use only accessories that meet EXFO specifications.
EXFO guarantees the specifications and viability of the products
ONLY if they are used with chargers and batteries provided by
EXFO.
Use the external power supply indoors only.
WARNING
CAUTION
WARNING
Operation of any electrical instrument around flammable gases
or fumes constitutes a major safety hazard.
To avoid electrical shock, do not operate the unit if any part of
the outer surface (covers, panels, etc.) is damaged.
Use only the AC adapter/charger provided by EXFO with your
unit.
Use only the car outlet adapter designed for your unit and
approved by EXFO. The car outlet adapter contains a
replaceable fuse. Replace the damaged fuse ONLY with a fuse of
the same type: 3AG certified, 16 VDC, 3 A, with an I
2
40 A
sec and 80 A2sec.
When you use the unit outdoors, ensure that it is protected
from liquids, dust, direct sunlight, precipitation, and full wind
pressure.
10FOT-930
2
t between
Page 19
Safety Information
Electrical Safety Information
Equipment Ratings
Temp er at ur e
Operation
Storage
Relative humidity
unit
AC adapter
a
-0 °C to 40 °C (32 °F to 104 °F)
-40 °C to 70 °C (-40 °F to 158 °F)
95 % non-condensing
0 % to 80 % non-condensing
Maximum operation altitude5000 m (6562 ft)
Pollution degree2 (connected to AC mains)
3 (powered by batteries)
Overvoltage category
unit
AC adapter
Input power
unit
AC adapter
d
120 V, 14.4 W, 60 Hz
I
II
9 - 16 V; 12 W
230 V, 17 W, 50 Hz
b
c
a. Measured in 0 °C to 31 °C (32 °F to 87.8 °F) range, decreasing linearly to 50 % at 40 °C (104 °F)
b. For indoor use only.
c. Equipment is normally protected against exposure to direct sunlight, precipitations and full wind pressure.
d. Not exceeding ± 10 % of the nominal voltage
Multifunction Loss Tester11
Page 20
Page 21
3Getting Started with Your
Multifunction Loss Tester
CAUTION
To avoid damaging your unit, use it only with modules approved by
EXFO.
Turning the Unit On and Off
When you turn the unit on, you may use it immediately under normal
conditions (while the source offers good startup performance, you should
allow a 5-minute warmup).
When the unit is turned off, it keeps the following parameters in its internal
memory:
FASTEST parameters
Current power meter wavelength and list of favorite wavelengths
User-defined thresholds
Autonaming settings
Regional, LCD and energy-saving settings
Saved values and test results
IMPORTANT
If you remove batteries (and the AC adapter/charger is unplugged),
the unit will turn off without saving the above elements.
The date and time will be lost only if you remove the clock battery.
Note: To ensure that the power is completely turned off, disconnect the AC
adapter/charger and remove the batteries.
Multifunction Loss Tester13
Page 22
Getting Started with Your Multifunction Loss Tester
To activate the function
displayed directly above
To move around, select items,
and change parameters
To access F
ASTEST
To access the main menu
To access help about
current function
To adjust brightness (four levels)
To turn unit on/off
(blinks when idle or
when probe is active)
To cancel/exit current function
Keypad
To scroll through available
functions
Using Menus and Keypad
To turn the unit on:
Press . The unit initializes for a few seconds and displays the Power
Meter pane.
To turn the unit off:
Hold down the button for two seconds.
Using Menus and Keypad
You can access optical tools from the keypad or menu. Menu options may
differ depending on your unit configuration.
14FOT-930
Page 23
Getting Started with Your Multifunction Loss Tester
Power meter status (detected modulation)
Source/F
ASTEST/ORL meter status (active wavelength
or detected modulation)
VFL status (on/off)
Current date and time
Battery number/status and DC power status
Talk set status (seeking or connected)
Status Bar
Using Menus and Keypad
To access main features:
1. Press the Menu key.
2. Use the arrows to select feature and press Enter.
To activate F1/F2 functions:
1. Use the left/right function arrows (beside F1/F2 keys) to make the
desired function or parameter visible.
2. Press the F1 or F2 key located just below.
To access and modify on-screen parameters:
1. Use the arrows to select an on-screen item (drop-down list, keyboard,
check box, etc.).
2. Press Enter to activate or open it.
To enter text or numbers with an on-screen keyboard:
Multifunction Loss Tester15
Use the left/right function arrows (beside F1/F2 keys) to move the
Use the up/down and left/right arrows to select a character, then press
Press OK (F1/F2 key) to accept the element and hide the keyboard.
cursor in the text.
Enter to add it.
Page 24
Page 25
4Customizing Your
Multifunction Loss Tester
Selecting the Language of Operation
You may display the user interface in one of six languages (default is
English). If other languages become available in the future, you could
access them by replacing the unit software (see Upgrading the Embedded Software on page 80). Values are kept in memory when you turn the unit
off. You may also revert to factory settings at any time.
To select a new interface language:
1. Press Menu, then select Setup > Unit.
2. Press Next Tab (F1/F2 key) until you get to
the Regional tab.
3. Use the arrows to select the Language list,
then press Enter to open it.
4. With the current language highlighted, use
the up/down arrows to select the desired language, then press Enter to
activate it.
To revert unit to factory-default settings:
1. Press Menu, then select Setup > Unit.
2. Press Factory Settings (F1/F2 key). Values on all tabs of the Unit Setup
pane are returned to factory settings.
Multifunction Loss Tester17
Page 26
Customizing Your Multifunction Loss Tester
Setting the Date and Time
Setting the Date and Time
The current date and time are displayed on the status bar. When saving
results, the unit also saves the corresponding date and time.
You must enter the date according to the year-month-day format and the
time according to the 24-hour format.
Note: A dedicated clock battery keeps the date and time accurate. For details, see
Replacing Batteries on page 77.
To set the date and time:
1. Press Menu, then select Setup > Unit.
2. Press Next Tab (F1/F2 key) until you get to
the Regional tab.
3. Use the arrows to select any of the date or
time settings, then press Enter to display the
on-screen keyboard (for details about using
keyboards, see Using Menus and Keypad on page 14).
4. Set the new value and press OK (F1/F2 key).
18FOT-930
Page 27
Customizing Your Multifunction Loss Tester
Adjusting the Brightness and Contrast
Adjusting the Brightness and Contrast
To fit your work environment, you may adjust the LCD brightness and
contrast. Values are kept in memory when you turn the unit off. You may
also revert to factory settings at any time.
Note: These settings do not apply to the Fiber Inspection Probe display. For
details, see Inspecting Fibers with the FIP on page 63.
To adjust the display brightness and contrast:
Press the key repeatedly to switch between brightness levels (0-4-7-10).
OR
1. Press Menu, then select Setup > Unit.
2. Press Next Tab (F1/F2 key) until you get to
the LCD tab.
3. Use the up/down arrows to select the
Brightness or Contrast slider.
4. Use the left/right arrows to adjust the
brightness or contrast level.
To revert unit to factory-default settings:
1. Press Menu, then select Setup > Unit.
2. Press Factory Settings (F1/F2 key). Values on all tabs of the Unit Setup
pane are returned to factory settings.
Multifunction Loss Tester19
Page 28
Customizing Your Multifunction Loss Tester
Activating and Setting Screen Saver and Auto-Off
Activating and Setting Screen Saver and
Auto-Off
When you do not use the unit for a while, the display may be dimmed to
save power. Your unit may also turn itself off completely.
You can set idle durations for DC and battery operation. Values are kept in
memory when you turn the unit off. You may also revert to factory settings
at any time.
Note: The ON/OFF button blinks to indicate screen saver activation, but unit
operation is not interrupted. Press any key to deactivate the screen saver.
To activate/deactivate the screen saver or auto-off:
1. Press Menu, then select Setup > Unit.
2. Press Next Tab (F1/F2 key) until you get to
the Power tab (for auto-off) or Display tab
(for screen saver).
3. Use the up/down arrows to select the battery
or AC adapter duration list, then press Enter
to open the list.
4. With the current duration highlighted, use the up/down arrows to
select the desired duration (or Never), then press Enter to confirm.
To revert unit to factory-default settings:
1. Press Menu, then select Setup > Unit.
2. Press Factor y Settings (F1/F2 key). Values on all tabs of the Unit Setup
pane are returned to factory settings.
20FOT-930
Page 29
5Setting Up Your Multifunction
Bare metal
(or blue border)
indicates UPC
option
Green border
indicates APC
option
234
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 Tester21
Page 30
Setting Up Your Multifunction Loss Tester
Cleaning and Connecting Optical Fibers
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.
22FOT-930
Page 31
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 Tester23
Page 32
Setting Autonaming Scheme
Setting Autonaming Scheme
Initially, the unit suggests cable and fiber names based on autonaming
settings. After saving a result, the unit prepares the next fiber name by
incrementing the suffix (or by adding “001” to a name with no 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 delete all cables
from memory.
Cable names: maximum 21 characters for prefix, 3 digits for number
(or 24 characters when name is manually set)
Fiber names: maximum 12 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.
24FOT-930
Page 33
Setting Autonaming Scheme
To set the autonaming scheme:
1. Press Menu, then select Setup > Data
Autonaming.
2. Use the arrows to select the cable prefix,
cable number or fiber prefix.
3. Press Enter to display the on-screen
keyboard (for details about using keyboards, see Using Menus and
Keypad on page 14).
4. Set the name/value, then press OK (F1/F2 key) to hide the keyboard.
To revert to the factory-default autonaming scheme:
1. Press Menu, then select Setup > Data Autonaming.
2. Press Factory Settings (F1/F2 key).
Multifunction Loss Tester25
Page 34
Setting Pass/Fail Thresholds
Setting Pass/Fail Thresholds
You can define five groups of thresholds to specify acceptable loss (in dB
and dB per distance unit) and ORL values (in dB) for each wavelength, for
both singlemode and multimode fibers.
Thresholds are supplied by system manufacturers and depend on the
system deployed.
Each time a measurement exceeds a threshold, the result is shown with a
red background and an exclamation mark in the table.
IMPORTANT
Thresholds are not saved with measurements. Results are compared
to the threshold group currently active on the unit where results
are viewed (for F
Note: When transferring results from handheld unit to computer, thresholds are
not transferred along with results. However, you can define thresholds in
the Optical Report Viewer application.
ASTEST results, not necessarily the master unit).
26FOT-930
Page 35
Setting Pass/Fail Thresholds
To set loss or ORL thresholds:
1. Press Menu, then select Setup >
Thresholds.
2. Use the arrows to select a threshold group in
the Current list. Select None to deactivate all
thresholds.
3. Use the arrows to select:
a fiber mode (singlemode or multimode)
loss units (dB or dB/distance; distance units are selected in FASTEST
setup)
Note: When feet is the current distance unit, you must set thresholds in dB/kft to
obtain meaningful values.
4. Use the arrows to select a value in the table (under the Loss or ORL
columns), then press Enter to display the on-screen keyboard (for
details about keyboards, see Using Menus and Keypad on page 14).
5. Set the threshold, then press OK (F1/F2 key) to hide the keyboard. The
value must be within your unit’s loss/ORL range.
Thresholds are saved only when you turn the unit off.
To rename a threshold group:
1. From the Thresholds pane, use the arrows to select the Current list,
then press Enter to open it.
2. With the current group highlighted, use the up/down arrows to select
the desired group, then press Enter to activate it.
3. Press Rename (F1/F2 key) to display the on-screen keyboard (for
details about keyboards, see Using Menus and Keypad on page 14).
4. Set the new group name (maximum 10 characters), then press OK
(F1/F2 key).
Multifunction Loss Tester27
Page 36
Page 37
6Measuring Power or Loss
Power meter port
Open list or press Wavelength to
switch between favorite wavelengths.
Press Setup to modify the list
of favorite wavelengths
or activate auto-detection.
Measured power/loss
Modulation detected
(PM if no modulation)
Open list or press W/dBm/dB to
display power (W or dBm) or
loss (dB).
Press Reference to set new
reference for loss measurement.
Open lists to change cable/fiber
name of next saved data.
Press Store to save current value
under displayed name.
The FOT-930 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 Tester29
Page 38
Measuring Power or Loss
Defining the List of Favorite Wavelengths
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).
Note: The list must always contain at least one selected wavelength.
30FOT-930
Page 39
Measuring Power or Loss
Defining the List of Favorite Wavelengths
To customize the list of favorite and selected wavelengths:
1. Press Menu, then select Setup >
Power Meter.
OR
From the Power Meter pane, press Setup
(F1/F2 key).
2. Using the up/down arrows, scroll through the
list.
3. Press Enter to select/deselect the highlighted wavelength. An X
appears beside selected wavelengths.
4. If a wavelength does not appear on the list, you can add it by pressing
Add Wavelength (F1/F2 key). You can also remove a wavelength from
the list by pressing Remove Wavelength (F1/F2 key).
5. Repeat these steps for other wavelengths as necessary.
To revert to the factory-default list:
1. Press Menu, then select Setup > Power Meter.
OR
From the Power Meter pane, press Setup (F1/F2 key).
2. Press Factory Settings (F1/F2 key).
Multifunction Loss Tester31
Page 40
Measuring Power or Loss
Nulling Electrical Offsets
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. Press Menu, then select Setup > Power Meter.
OR
From the Power Meter pane, press Setup (F1/F2 key).
2. Press Nulling (F1/F2 key).
3. Tighten the protective caps on the power
meter and F
The nulling process takes approximately 10
seconds. Check marks appear next to nulled
detectors. If light is still detected, you will
need to place the caps properly and restart.
32FOT-930
ASTEST ports, then press OK.
Page 41
Measuring Power or Loss
Referencing Your Power Meter to a Source
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
(-36.87 dBm) is subtracted from the actual power
measured (-7.89 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.
Compatible sources (such as FOT-300 and FLS-300) can transmit a
reference value to your power meter, avoiding the need for manual
referencing. This value is not the source’s actual power. It is a user-defined
value that may not take the link loss into account.
Multifunction Loss Tester33
Page 42
Measuring Power or Loss
Light
source
Power
meter
Adapter
Reference
patchcord
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. Press Menu, then select Power Meter.
2. Check your fibers and clean them properly for optimum performance
(see Cleaning and Connecting Optical Fibers on page 22).
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.
5. Match the power meter wavelength with the
source wavelength as follows:
Press Wave l e n g t h (F1/F2 key) to switch
between favorite wavelengths of your
power meter (see Defining the List of Favorite Wavelengths on page 30).
OR
If the source emits an auto-wavelength signal and auto-detection is
enabled (see Automatically Detecting Wavelength on page 39), the
power meter automatically matches the source wavelength.
34FOT-930
Page 43
Measuring Power or Loss
Referencing Your Power Meter to a Source
6. Press W/dBm/dB (F1/F2 key) until you get
dB units to retrieve the last saved reference.
OR
Press Reference (F1/F2 key) 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.
To receive the reference value from a compatible source:
1. Connect the source to your power meter (with or without a fiber under
test).
2. Use the source to emit the special signal that contains its power value.
For more information, refer to the source’s user guide.
When it detects the special signal, the power meter beeps. The
new reference power is displayed (in dBm) and current loss
reading is automatically switched to dB.
You cannot change the power meter wavelength, units or
reference power manually.
Multifunction Loss Tester35
Page 44
Measuring Power or Loss
Measuring Power or Loss
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 32).
2. Press Menu, then select Power Meter.
3. Check your fibers and clean them properly (see Cleaning and
Connecting Optical Fibers on page 22).
4. For loss measurements, reference your power meter to a light source
(see Referencing Your Power Meter to a Source on page 33), then
deactivate the light source.
CAUTION
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.
OR
If you have used two reference patchcords, disconnect both of them at
the bulkhead.
36FOT-930
Page 45
Measuring Power or Loss
Light
source
Power
meter
Adapter
Reference
patchcord
Fiber
under test
Reference
patchcord
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:
Press Wave l e n g t h (F1/F2 key) to switch between favorite
wavelengths of your power meter (see Defining the List of Favorite
Wavelengths on page 30).
OR
If the source emits an auto-wavelength signal and auto-detection is
enabled (see Automatically Detecting Wavelength on page 39), the
power meter automatically matches the source wavelength.
If the unit detects a modulated signal, it beeps and the signal frequency
is indicated in the status bar, next to a yellow LED: 2k indicates a 2-kHz
signal, 1k a 1-kHz signal, and 270 a 270-Hz signal.
9. Press W/dBm/dB (F1/F2 key) to select the desired power (W or dBm)
or loss (dB) unit.
Multifunction Loss Tester37
Page 46
Measuring Power or Loss
Measuring Power or Loss
10. Save the displayed values, if desired.
10a.Change the displayed cable and fiber
names as needed.
10b.Press Store (F1/F2 key) 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 55.
11. Repeat the procedure for other wavelengths.
38FOT-930
Page 47
Measuring Power or Loss
Automatically Detecting Wavelength
Automatically Detecting Wavelength
Compatible sources (such as FOT-930, FOT-300 and FLS-300) can transmit
their wavelength values through the fiber, avoiding the need to manually
match the source and power meter wavelengths.
Note: When receiving an auto-wavelength (or Auto-ID) signal, you cannot
manually change the power meter wavelength.
To receive an auto-wavelength signal from a source:
1. Press Menu, then select Setup > Power
Meter.
OR
From the Power Meter pane, press Setup
(F1/F2 key).
2. Use the arrows to select Automatic
wavelength detection, then press Enter.
3. Connect a compatible source to your unit’s power meter port.
4. Activate the source in Auto-ID mode (FOT-930: see Using a Light
Source on page 59).
Your power meter automatically matches the source wavelength.
Multifunction Loss Tester39
Page 48
Page 49
7Measuring Optical Return Loss
ORL meter port
Open lists to change cable/fiber
name of next saved data.
Press Store to save current ORL
value under displayed name.
Measured ORL
(positive value)
Current ORL wavelength
Open list or press Wavelength
to switch between singlemode
wavelengths.
Press ORL Zero to calibrate
the ORL meter sensitivity.
Press Default ORL Zero to revert to
factory-default sensitivity.
Press ORL Reference to set reference
using ORL calibrated patchcord (best).
Press Loopback Ref. to use
any other patchcord.
Optical return loss (ORL) is the total effect of multiple reflections and
scattering events within a fiber-optic system.
The FOT-930 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 Tester41
Page 50
Measuring Optical Return Loss
Set
ORL zero
Measure
ORL
Save
results
Perform
ORL reference
Set up thresholds
(see page 26)
Null offsets
(see page 32)
Select
wavelength
TerminationComponent
under test
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. Press Menu, then select ORL Meter.
2. Press ORL Zero (F1/F2 key).
3. Connect a patchcord to the F
42FOT-930
ASTEST SM port.
Page 51
Measuring Optical Return Loss
Per f orming and S aving ORL Measurements
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. Press Menu, then select ORL Meter.
2. Press Default ORL Zero (F1/F2 key).
Performing and Saving ORL Measurements
You can define ORL thresholds (see Setting Pass/Fail Thresholds on
page 26) 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 32).
2. Press Menu, then select ORL Meter.
3. Press Wavelength (F1/F2 key) to select a singlemode wavelength.
4. Verify your patchcords and clean them properly (see Cleaning and
Connecting Optical Fibers on page 22).
Note: If the F
EXFO’s optional ORL calibrated patchcord.
Multifunction Loss Tester43
ASTEST SM port of your unit is equipped with an APC connector, use
Page 52
Measuring Optical Return Loss
Performing and Saving 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.
Use the left/right function arrows to display
ORL Reference and press the F1 or F2 key
to select it.
In the ORL Reference message box, press
OK (Enter).
44FOT-930
Page 53
Measuring Optical Return Loss
Te rm i n at i o nComponent
under test
Per f orming and S aving ORL Measurements
7. Pe rfor m an ORL zero measurement (see Performing ORL Reference
and Setting ORL Zero Value on page 42).
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. Save the displayed values, if desired.
9a. Change the displayed cable and fiber
names as needed.
9b. Press Store (F1/F2 key) to save the
value along with wavelength, 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 55.
10. Repeat procedure for other wavelengths if necessary.
Multifunction Loss Tester45
Page 54
Page 55
8Performing Automated
FASTEST singlemode (SM) and
multimode (MM) ports
Perform
F
ASTEST
Perform
reference
Save
results
Set ORL zero
(see page 42)
Null offsets
(see page 32)
Set up
F
ASTEST
Set up thresholds
(see page 26)
IL/ORL/Length Measurements
ASTEST)
(F
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).
F
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
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
DescriptionReference 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
F
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 42).
With multiple referencing, you
may coordinate an FTB-3930 with
up to 10 FOT-930 units.
2. In the Ref. Type list, select the Side-by-side
reference type, then press Enter. An
illustration of the connection is shown with
previous reference values (if any).
3. Connect both units through their F
ASTEST ports, using two reference
patchcords and a bulkhead adapter.
4. Press Take Reference (F1/F2 key). 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
2. In the Ref. Type list, select the Loopback
reference type, then press Enter. An
illustration of the connection is shown with
previous reference values (if any).
3. Connect a reference patchcord from the F
ASTEST
port to the power meter adapter.
4. Press Take Reference (F1/F2 key). 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
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.
ASTEST
To p er f or m a F
Unit A (Master)Unit B
ASTEST:
1. If necessary, null the offsets (see
Nulling Electrical Offsets on page 32).
2. Clean your fibers properly (see
Cleaning and Connecting Optical
Fibers on page 22).
3. Set up the F
ASTEST (see Setting Up the
FasTesT on page 48).
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 42).
5. Reference your unit (see Referencing
Units for FasTesT on page 49).
6. Connect reference patchcord to fiber
under test (as shown):
Open lists to select cable/fiber
name for data to be saved.
Press Store to save results under
displayed name.
Press Next Tab to switch
to next result type.
Red/exclamation mark indicates
result that exceeds threshold.
Disk icon would indicate
unsaved results.
Press Setup to modify
F
ASTEST parameters.
(FTTx view)
Performing the FASTEST
Unit A (Master)Unit B
7. From the F
ASTEST pane, set the next
cable/fiber names as needed (used
for automatic save).
8. Press the F
ASTEST key or press Start
Test (F1/F2 key).
The units establish communication and automated tests begin. Measurements
appear on both units as they are taken.
9. Save the displayed values if you want.
If Auto save was activated for one or
both units, results are already saved.
9a. Change the displayed cable and
fiber names as needed.
9b. Press Store (F1/F2 key) to save
the values. The fiber name
increments automatically, ready
to save the next value.
If you are not satisfied with the results,
press F
For details about viewing FASTEST results, see Managing Test Results on page 55.
Multifunction Loss Tester53
ASTEST and redo the test.
Page 62
Page 63
9Managing Test Results
Open lists to select cable/fiber name
of data to recall.
Press Next Fiber or Next Cable to
switch between available results.
Press Next Tab to switch
to next result type.
Red/exclamation mark indicates
result that exceeds threshold.
Press Delete Fiber or Delete Cable to
remove data from list.
Press Delete All Cables to free
memory.
(standard view)
Viewing and Deleting Results
You can save up to 1024 results (FASTEST, power/loss and ORL) in your unit,
along with references and date/time of tests. You will save and recall this
data according to cable and fiber names.
IMPORTANT
The date and time of FASTEST references are not saved. They are
displayed with the results immediately after the test only.
To view and process test results:
Press Menu, then select Results/Information > Cable Results. The
following functions are available when viewing results:
IMPORTANT
You cannot recover deleted results. Ensure that you transfer
your data to a computer if you intend to use it later.
Deleting a single cable/fiber does not free memory. To free
memory, you must delete all cables at once.
Note: For more accuracy, the average is always calculated from loss values in W
and then converted to dB.
Multifunction Loss Tester55
Page 64
Managing Test Results
Serial port
(male DB9)
RS-232
connector
Checking Available Memory
Checking Available Memory
You can save up to 1024 results in the unit memory.
To view the available memory on your unit:
Press Menu, then select Results/Information > Unit Info.
Transferring Test Results to a Computer
Using an appropriate serial cable and the Handheld Data Transfer software,
you can transfer results from your handheld unit to a computer or FTB-500.
This way, you can increase storage capacity, perform better analyses on
test results and create reports.
Transferred files are not automatically deleted from your unit.
To transfer test results to a computer:
1. Using the serial cable, connect your unit to an available COM port of
the computer.
IMPORTANT
Note: If your computer is not equipped with an RS-232 port, you can use a USB
adapter. After installing the proper drivers, your computer should associate
the adapter to an available COM port.
56FOT-930
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Managing Test Results
Transferring Test Results to a Computer
2. Turn on both the computer and your handheld unit. Ensure that your
unit will remain on during the transfer (connect it to a power outlet and
deactivate auto-off).
3. On the computer, launch the Handheld Data Transfer application and
start the operation.
Note: For details about setting up the software and transferring data, refer to the
Handheld Data Transfer online help.
Multifunction Loss Tester57
Page 66
Page 67
10Using a Light Source
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
(see Technical Specifications on page 93).
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.
A special Auto ID signal can transmit its wavelength value, to facilitate
wavelength detection by a compatible unit.
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.
The Power Meter pane remains displayed
when you use the source.
If you switch to power meter or VFL while a
source is active, the Source pane remains
displayed.
When you switch sources, the modulation
remains the same. It is indicated in the Source pane.
Multifunction Loss Tester59
Page 68
Using a Light Source
Only one source/wavelength may be active at a time. The active port
(SM or MM) is indicated in the Source pane.
The source status is indicated with a LED in the status bar and with the
Active indicator under the keypad.
Note: The Active indicator always shows the source, VFL, ORL meter or talk set
port status (even in FIP or idle mode).
To activate a light source:
1. Connect the fiber under test to the source port (see Cleaning and
Connecting Optical Fibers on page 22).
2. Press Menu, then select Source/VFL > Source (units with a VFL) or
Source (units with no VFL).
3. Press Wavelength (F1/F2 key) to activate each available source in turn.
OR
Use the arrows to open the wavelength/status list and select the
desired wavelength.
To deactivate a light source:
Press Wave l e n g t h (F1/F2 key) until you get past the last source. The list
displays Off.
OR
Use the arrows to open the wavelength list and select Off.
To change the signal modulation:
1. Activate the source if you want.
2. Press Modulation (F1/F2 key) to switch
between available modulations.
OR
3. Use the arrows to open the list and select the
desired modulation.
60FOT-930
Page 69
11Identifying Fiber Faults
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.
The Power Meter pane remains displayed
when you use the VFL.
If you switch to source or power meter while
the VFL is active, the VFL pane remains
displayed.
The VFL status is indicated with a LED in the
status bar and with the Active indicator under the keypad.
Note: The Active indicator always shows the source, VFL, ORL meter or talk set
port status (even in FIP or idle mode).
Multifunction Loss Tester61
Page 70
Identifying Fiber Faults Visually
The red light indicates
that the VFL is on.
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 22).
2. Press Menu, then select Source/VFL > VFL.
3. Press VFL On/Off (F1/F2 key) to activate the VFL (list displays On).
OR
Use the arrows to open the VFL status list and select On.
4. To switch between blinking (1 Hz) and continuous (CW) signals, press
Modulation (F1/F2 key).
OR
Use the arrows to open the list and select the desired modulation.
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 pressing VFL On/Off (F1/F2 key).
62FOT-930
Page 71
12Inspecting Fibers with the FIP
The fiber inspection probe allows you to find dirty or damaged connectors
by displaying an enlarged view of the connector surface.
The following common features of video fiber inspection probes are
compatible with your unit:
Magnification control: supports 200x, 400x or other zoom factors.
Focus control: allows you to fine-tune the display quality.
Image capture: freezes the image on the FOT-930 display by pressing a
button.
For more information, refer to the user guide that came with your probe.
IMPORTANT
When another unit requests a FASTEST with your unit, the FASTEST
takes over and Probe mode is interrupted.
You cannot receive text messages or talk set calls while using
Probe mode.
To access Probe mode on your unit:
1. Connect the probe to the right side of the unit, using an adapter if
necessary.
2. Activate the probe display using one of the following:
Press Menu, then select Probe.
Press the button on the probe (some models only).
To adjust brightness or contrast:
Brightness: use up/down arrows.
Contrast: use left/right arrows.
To exit Probe mode and return to the regular display:
Press Esc or Menu.
Multifunction Loss Tester63
Page 72
Page 73
13Communicating 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
F
ASTEST ports.
It is possible to send a predefined message or to write one of your own
(maximum 30 characters). However, custom messages are deleted when
you turn the unit off.
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.
Multifunction Loss Tester65
Page 74
Communicating with Other Users
Sending and Receiving Text Messages
To add a custom text message to the list:
1. Press Menu, then select
Talk Set/Messages > Messages (units with a
talk set) or Messages (units with no talk set).
2. Using the up/down arrows, scroll through the
list and select a message to use as a basis.
3. Press New Message (F1/F2 key).
4. Enter or change the message text using the on-screen keyboard and
press OK (F1/F2 key). The message is added to the list.
To send a text message:
1. Connect the units at each end of the same fiber via their F
2. On the sending unit, press Menu, then select
Talk Set/Messages > Messages (units with a
talk set) or Messages (units with no talk set).
ASTEST ports.
66FOT-930
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Communicating with Other Users
Sending and Receiving Text Messages
3. Ensure that the port indicated (SM or MM) is the one you use.
Otherwise, press Port Setup (F1/F2 key) and change it, then return to
the Messages pane.
4. Using the up/down arrows, scroll through the list and select the
message.
5. Press Send (F1/F2 key).
After a few seconds, your message will automatically appear on the
receiving unit. 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 OK to clear the display and return to your previous function.
Press Reply to access the Messages pane and reply to the message.
You will then need to use the menu to return to your previous function.
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 Tester67
Page 76
Communicating with Other Users
Tal k s e t po r t
Communicating by Voice
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.
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.
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.
68FOT-930
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Communicating with Other Users
Communicating by Voice
To communicate between units:
Calling UnitReceiving Unit
1. Connect the calling unit to one end of
the fiber via its talk set port, and plug
in your headset.
2. Press Menu, then select
Talk Set/Messages > Talk Set.
1. Connect the receiving unit to the
other end of the fiber via its talk set
port, and plug in your headset.
Multifunction Loss Tester69
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Communicating with Other Users
Communicating by Voice
Calling UnitReceiving Unit
3. Press Talk . Your unit establishes
communication with receiving unit.
When receiving the call, the unit rings
3 times. 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 s et pane.
To adjust the headset volume (calling or receiving unit):
1. Press Menu, then select Tal k Set/ Me s sa g e > Talk Set .
2. Using the left/right arrows, adjust the volume level.
You cannot adjust or mute the ring sound.
70FOT-930
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14Maintenance
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.
The use of controls, adjustments and procedures other than those
specified herein may result in exposure to hazardous situations or
impair the protection provided by this unit.
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.
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Maintenance
Push
Tur n
Pull
3
4
5
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.
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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.
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Maintenance
Cleaning Detector Ports
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
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.
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Maintenance
Cleaning VFL-Type Connectors
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).
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Maintenance
Recharging Main Batteries
Recharging Main Batteries
The main Lithium-Ion batteries will last about 9 hours in normal operation.
The combined charge status is shown on
the status bar.
The charge status of each battery is shown
on the Unit Info pane (press Menu, then
select Results/Information > Unit Info).
The unit also indicates the charge status
with LEDs on its left side:
Status LEDBattery Charge Status
GreenFully charged
RedCharging
YellowError
IMPORTANT
Batteries are not charged at the factory. Fully charge them
(about 4 hours) before using the unit for the first time.
Batteries function and charge properly between 0 °C and 45 °C
(32°F and 113°F). Batteries will not charge if the temperature is
below -10 °C (14 °F) or above 45 °C (113 °F).
Never store at temperatures above 60 °C (140 °F).
Charge only with specified charger.
To recharge the main batteries:
Connect the unit to a power outlet (or car outlet) using the AC
adapter/charger. The charge cycle will start and end automatically.
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Maintenance
Replacing Batteries
Replacing Batteries
You may replace main batteries or the clock battery at any time without
affecting operation.
The two main Lithium-Ion batteries are independent, so you can replace
one while the other is in use. If the unit is plugged in, you can replace both
batteries while the unit is on.
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Maintenance
Battery Safety Information
Battery Safety Information
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.
Do not throw batteries into fire or water and do not short-circuit
the batteries’ electrical contacts. Do not disassemble.
To replace main batteries:
1. Open the battery compartment door located at the
back of the unit.
2. Replace one or both batteries, respecting the polarity.
3. Close the battery compartment door.
WARNING
WARNING
To replace the clock battery:
1. Open the battery compartment door located at the
back of the unit.
2. Remove main batteries to reveal the clock battery door.
CAUTION
To reduce the risk of damage due to electrostatic discharge, touch
grounded unpainted metal before handling the clock battery.
3. Open the clock battery compartment door with a screwdriver.
4. Replace the battery, respecting the polarity as shown.
5. Close the battery compartment doors.
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Maintenance
Recalibrating the Unit
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.
Under normal use, the recommended interval for your FOT-930
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).
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.
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Maintenance
Upgrading the Embedded Software
Note: The FlexCare warranty program includes Calibration/Verification packages
(see Service and Repairs on page 91).
Upgrading the Embedded Software
To upgrade the unit’s embedded software, you will need to obtain the
upgrade files from EXFO’s Technical Support Group. You will also need an
RS-232 cable and the Firmware Update application.
IMPORTANT
During software upgrades, you should connect your unit to a
power outlet. If problems occur, contact EXFO.
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.
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15Troubleshooting
Solving Common Problems
ProblemPossible CauseSolution
The unit does not turn on. You did not press
long enough.
AC adapter/charger not
connected.
Main batteries
discharged.
Weather too cold.
The display is almost blank
at power-up.
The date returns to
1900-01-01.
Batteries do not charge as
expected.
A battery status LED is
yellow.
During offset nulling, you
get the following message:
“Light detected during
nulling.”
Brightness may need some
adjustment.
Clock battery is dead.Replace the clock battery
Temperature is too
high.
Battery is incorrectly
connected.
Battery is defective.Contact EXFO or replace the
Light reaches at least one
detector (power meter or
F
ASTEST).
Press for 2 seconds.
Connect the AC
adapter/charger.
Charge batteries by
connecting the AC
adapter/charger.
Press to adjust brightness
properly.
(see Replacing Batteries on
page 77).
Ensure temperature is
within specifications.
Ensure battery is
connected properly.
battery.
Ensure protective caps are
tightly screwed on F
and power meter ports and
perform the nulling again.
Do not use rubber cover.
ASTEST
When using the power
meter, you get Power Too Low or Power Too High.
Multifunction Loss Tester81
Power of the signal
received at the power
meter port is outside its
measurement range.
Check the connections.
Ensure you use the proper
fiber and connector type and
that you use your power
meter within specifications.
Page 90
Troubleshooting
Solving Common Problems
ProblemPossible CauseSolution
Unable to change
wavelength in Power Meter
pane.
Unable to change dB unit
or reference power in
Power Meter pane.
OR
Unit or reference value you
changed are replaced by
other values after a while.
When measuring ORL, you
get Too Much Power.
When measuring ORL, you
get ORL exceeds.
Power meter receives
auto-wavelength (Auto-ID)
signal.
Power meter receives
reference power value from
compatible source.
Measured reflected power
is higher than emitted
power. The ORL reference
is incorrect.
Reflection is below
sensitivity (Max ORL) of
ORL meter.
Change source’s emitting
mode.
Deactivate wavelength
detection.
Wait a few seconds until
power value is received, then
retry.
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.
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Troubleshooting
Solving Common Problems
ProblemPossible CauseSolution
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 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.
Make sure remote unit is
an FOT-930, FTB-3930,
FOT-920 or FTB-3920.
Set the port (SM or MM)
correctly in F
ASTEST Setup
on master unit.
Set the compatibility to
FOT-920 in F
ASTEST Setup
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.
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Troubleshooting
Solving Common Problems
ProblemPossible CauseSolution
Unable to send a text
message.
Selected port differs
from actual port to
which fiber is
connected.
Receiving unit’s port is
in use.
Remote unit is not
compatible.
On the sending unit, set
the correct port (SM or
MM) in F
Wait until FASTEST
ASTEST Setup.
completes, turn source
and ORL meter off or exit
Probe mode.
Make sure remote unit is
an FOT-930, FTB-3930,
FOT-920 or FTB-3920.
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Page 93
Troubleshooting
Obtaining Online Help
Obtaining Online Help
Context-sensitive help is conveniently available
at all times to guide you through the use of your
unit.
Most test operations pause while you view help,
but will resume automatically when you exit
help.
To obtain online help about current function:
Press the ? button from any pane or message box.
To navigate in the online help:
Use up/down arrows to scroll through help page.
Use left/right arrows to switch between hyperlinks (underlined items),
then press Enter to link to selected help page.
Press Next Page to switch between available topics in sequence.
Press Help Menu to display the main menu of help topics.
Press Esc to return to your test pane.
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Troubleshooting
Contacting the Technical Support Group
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.
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.
You may also be requested to provide the firmware version number.
To find out the firmware version number:
1. Press Menu, then select Results/Information > Unit Info.
2. Press About (F1/F2 key).
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Troubleshooting
Transportation
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.
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Page 96
Page 97
16Warranty
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.
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Warranty
Liability
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.
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Warranty
Service and Repairs
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 92). 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 92).
Multifunction Loss Tester91
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Warranty
EXFO Service Centers Worldwide
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