EXFO FOT-10A User manual

GENERAL DESCRIPTION 2
1.4 Getting Help
Our Customer Service Group is available in North America from 7:30 a.m. to 8:00 p.m.
(Eastern Standard Time), Monday to Friday.
2GENERAL DESCRIPTION
The FOT measures optical power (FOT-10A, FOT-20A, and FOT-30A) and loss
(FOT-20A and FOT-30A) at 5 precalibrated wavelengths in multimode and
singlemode fibers. A 2 kHz signal detection feature is also included for fiber
identification. The FOT-30A can be configured with a single- or dual-wavelength LED
or laser source.
The FOT is powered by the 9 V alkaline battery or the AC adapter/charger.
2.1 Display
EXFO Electro-Optical Engineering
(Corporate Headquarters)
465 Godin Avenue
Va n i e r Q C G 1 M 3 G 7
Canada
1 800 663-3936 (USA & Canada)
Tel.: [phone]
Fax: [phone]
[email protected]
www.exfo.com
EXFO Europe
Centre d’Affaires Les Metz
100, rue Albert Calmette
78353 Jouy-en-Josas, France
Tel.: [phone]
Fax: [phone]
Hz
CW
2kHz
auto
METER
dBm
µ W
dBm
nW
mW
Power meter wavelength in nm1
Low battery
Absolute power in dBm (or W in FOT-20 and FOT-30A)
AC adapter/charger
operation
9 V battery operation
Source wavelength (FOT-30A)
nm
off
SOURCE
850
1300
1310
1550
AC
9V
low
bat
Pre-calibrated wavelengths depend on detector type (Si: 650, 780, 820, 850, and 910 nm;
Ge/GeX: 780, 850, 1300, 1310, and 1550 nm).
Relative power in dB (FOT-20 and FOT-30A)
Auto-off function activated
Continuous wave (CW)
output signal activated
(FOT-30A)
2 kHz output signal
activated (FOT-30A)
2 kHz signal detection
Reference value in dBm
(FOT-20A and FOT-30A)
1.
GENERAL DESCRIPTION 2
1.4 Getting Help
Our Customer Service Group is available in North America from 7:30 a.m. to 8:00 p.m.
(Eastern Standard Time), Monday to Friday.
2GENERAL DESCRIPTION
The FOT measures optical power (FOT-10A, FOT-20A, and FOT-30A) and loss
(FOT-20A and FOT-30A) at 5 precalibrated wavelengths in multimode and
singlemode fibers. A 2 kHz signal detection feature is also included for fiber
identification. The FOT-30A can be configured with a single- or dual-wavelength LED
or laser source.
The FOT is powered by the 9 V alkaline battery or the AC adapter/charger.
2.1 Display
EXFO Electro-Optical Engineering
(Corporate Headquarters)
465 Godin Avenue
Va n i e r Q C G 1 M 3 G 7
Canada
1 800 663-3936 (USA & Canada)
Tel.: [phone]
Fax: [phone]
[e-mail]
www.exfo.com
EXFO Europe
Centre d’Affaires Les Metz
100, rue Albert Calmette
78353 Jouy-en-Josas, France
Tel.: [phone]
Fax: [phone]
Hz
CW
2kHz
auto
METER
dBm
µ W
dBm
nW
mW
Power meter wavelength in nm1
Low battery
Absolute power in dBm (or W in FOT-20 and FOT-30A)
AC adapter/charger
operation
9 V battery operation
Source wavelength (FOT-30A)
nm
off
SOURCE
850
1300
1310
1550
AC
9V
low
bat
Pre-calibrated wavelengths depend on detector type (Si: 650, 780, 820, 850, and 910 nm;
Ge/GeX: 780, 850, 1300, 1310, and 1550 nm).
Relative power in dB (FOT-20 and FOT-30A)
Auto-off function activated
Continuous wave (CW)
output signal activated
(FOT-30A)
2 kHz output signal
activated (FOT-30A)
2 kHz signal detection
Reference value in dBm
(FOT-20A and FOT-30A)
1.
GENERAL DESCRIPTION 2
1.4 Getting Help
Our Customer Service Group is available in North America from 7:30 a.m. to 8:00 p.m.
(Eastern Standard Time), Monday to Friday.
2GENERAL DESCRIPTION
The FOT measures optical power (FOT-10A, FOT-20A, and FOT-30A) and loss
(FOT-20A and FOT-30A) at 5 precalibrated wavelengths in multimode and
singlemode fibers. A 2 kHz signal detection feature is also included for fiber
identification. The FOT-30A can be configured with a single- or dual-wavelength LED
or laser source.
The FOT is powered by the 9 V alkaline battery or the AC adapter/charger.
2.1 Display
EXFO Electro-Optical Engineering
(Corporate Headquarters)
465 Godin Avenue
Va n i e r Q C G 1 M 3 G 7
Canada
1 800 663-3936 (USA & Canada)
Tel.: [phone]
Fax: [phone]
[e-mail]
www.exfo.com
EXFO Europe
Centre d’Affaires Les Metz
100, rue Albert Calmette
78353 Jouy-en-Josas, France
Tel.: [phone]
Fax: [phone]
Hz
CW
2kHz
auto
METER
dBm
µ W
dBm
nW
mW
Power meter wavelength in nm1
Low battery
Absolute power in dBm (or W in FOT-20 and FOT-30A)
AC adapter/charger
operation
9 V battery operation
Source wavelength (FOT-30A)
nm
off
SOURCE
850
1300
1310
1550
AC
9V
low
bat
Pre-calibrated wavelengths depend on detector type (Si: 650, 780, 820, 850, and 910 nm;
Ge/GeX: 780, 850, 1300, 1310, and 1550 nm).
Relative power in dB (FOT-20 and FOT-30A)
Auto-off function activated
Continuous wave (CW)
output signal activated
(FOT-30A)
2 kHz output signal
activated (FOT-30A)
2 kHz signal detection
Reference value in dBm
(FOT-20A and FOT-30A)
1.

FOT-10A, FOT-20A, & FOT-30A 3
2.2 Keypad
2.3 Connectors
Note: Two source ports can be provided on a dual-wavelength FOT-30A (option).
dBm
W
λ
select
Powers unit on or off
Selects operating
wavelength
Deactivates auto-off
Initiates calibration
on / off
FOT-10A
Accesses reference
(dB) mode
Powers unit on or off
Selects operating
wavelength
Accesses absolute mode,
and toggles between
dBm and W
Deactivates auto-off
Initiates calibration
on / off
ref
λ
select
FOT-20A
SOURCE
Toggles between CW and
2 kHz signal output
Accesses reference
(dB) mode
Powers unit on or off
Selects operating
wavelength
Accesses absolute mode, and
toggles between dBm and W
Deactivates auto-off
Initiates calibration
Powers source on or off
Toggles between the two
source wavelengths (dual-
wavelength FOT-30A)
on / off source
ref
CW
2 kHz
λ
select
dBm
W
POWERMETER
FOT-30A
Detector port
Source port (FOT-30A)
AC adapter/charger input
FOT-10A, FOT-20A, & FOT-30A 3
2.2 Keypad
2.3 Connectors
Note: Two source ports can be provided on a dual-wavelength FOT-30A (option).
dBm
W
λ
select
Powers unit on or off
Selects operating
wavelength
Deactivates auto-off
Initiates calibration
on / off
FOT-10A
Accesses reference
(dB) mode
Powers unit on or off
Selects operating
wavelength
Accesses absolute mode,
and toggles between
dBm and W
Deactivates auto-off
Initiates calibration
on / off
ref
λ
select
FOT-20A
SOURCE
Toggles between CW and
2 kHz signal output
Accesses reference
(dB) mode
Powers unit on or off
Selects operating
wavelength
Accesses absolute mode, and
toggles between dBm and W
Deactivates auto-off
Initiates calibration
Powers source on or off
Toggles between the two
source wavelengths (dual-
wavelength FOT-30A)
on / off source
ref
CW
2 kHz
λ
select
dBm
W
POWERMETER
FOT-30A
Detector port
Source port (FOT-30A)
AC adapter/charger input
FOT-10A, FOT-20A, & FOT-30A 3
2.2 Keypad
2.3 Connectors
Note: Two source ports can be provided on a dual-wavelength FOT-30A (option).
dBm
W
λ
select
Powers unit on or off
Selects operating
wavelength
Deactivates auto-off
Initiates calibration
on / off
FOT-10A
Accesses reference
(dB) mode
Powers unit on or off
Selects operating
wavelength
Accesses absolute mode,
and toggles between
dBm and W
Deactivates auto-off
Initiates calibration
on / off
ref
λ
select
FOT-20A
SOURCE
Toggles between CW and
2 kHz signal output
Accesses reference
(dB) mode
Powers unit on or off
Selects operating
wavelength
Accesses absolute mode, and
toggles between dBm and W
Deactivates auto-off
Initiates calibration
Powers source on or off
Toggles between the two
source wavelengths (dual-
wavelength FOT-30A)
on / off source
ref
CW
2 kHz
λ
select
dBm
W
POWERMETER
FOT-30A
Detector port
Source port (FOT-30A)
AC adapter/charger input

OPERATION 4
3OPERATION
3.1 Deactivating the Auto-Off Function
Note: At power-up, the FOT automatically performs a self-test before the
measurement mode is displayed.
When the FOT is battery powered, it is automatically in auto-off mode (unit powers
off after 10 minutes of inactivity). To deactivate the auto-off function,
1. Power off the FOT.
2. Press and hold λselect.
3. Press on/off, holding λselect until the unit enters measurement mode.
The auto-off marker should not be displayed.
Note: To reactivate the auto-off function, power on the unit with the AC adapter-
charger plugged in, then unplug the adapter. The auto-off marker should be
displayed.
3.2 Calibration
For optimum performance, the FOT should be calibrated before each test session as
follows:
1. Ensure that the detector port is capped.
2. Power on the FOT.
3. Press and hold λselect until CAL is displayed. The running lines on the
display indicate the calibration is in progress. After calibration, a dashed line is
displayed.
Note: If Err 1 is displayed, the calibration failed due to incident light on the detector.
Tighten detector cap, press any key to cancel the error message, then repeat
the calibration process.
3.3 Fiber Identification
To identify a fiber carrying a 2 kHz test signal,
1. Install the 2 kHz detection adapter on the detector port.
2. Place the fiber in the groove of the 2 kHz detection adapter and gently push
down the fiber. If the fiber carries a 2 kHz optical signal, the FOT beeps
2 seconds, and 2000 Hz is displayed.
3.4 Measuring Absolute Power
To measure absolute power,
1. If necessary, calibrate the FOT.
2. Install the appropriate connector adapter on the detector port, and connect the
fiber under test.
3. Press λselect to match the FOT and source wavelengths.
OPERATION 4
3OPERATION
3.1 Deactivating the Auto-Off Function
Note: At power-up, the FOT automatically performs a self-test before the
measurement mode is displayed.
When the FOT is battery powered, it is automatically in auto-off mode (unit powers
off after 10 minutes of inactivity). To deactivate the auto-off function,
1. Power off the FOT.
2. Press and hold λselect.
3. Press on/off, holding λselect until the unit enters measurement mode.
The auto-off marker should not be displayed.
Note: To reactivate the auto-off function, power on the unit with the AC adapter-
charger plugged in, then unplug the adapter. The auto-off marker should be
displayed.
3.2 Calibration
For optimum performance, the FOT should be calibrated before each test session as
follows:
1. Ensure that the detector port is capped.
2. Power on the FOT.
3. Press and hold λselect until CAL is displayed. The running lines on the
display indicate the calibration is in progress. After calibration, a dashed line is
displayed.
Note: If Err 1 is displayed, the calibration failed due to incident light on the detector.
Tighten detector cap, press any key to cancel the error message, then repeat
the calibration process.
3.3 Fiber Identification
To identify a fiber carrying a 2 kHz test signal,
1. Install the 2 kHz detection adapter on the detector port.
2. Place the fiber in the groove of the 2 kHz detection adapter and gently push
down the fiber. If the fiber carries a 2 kHz optical signal, the FOT beeps
2 seconds, and 2000 Hz is displayed.
3.4 Measuring Absolute Power
To measure absolute power,
1. If necessary, calibrate the FOT.
2. Install the appropriate connector adapter on the detector port, and connect the
fiber under test.
3. Press λselect to match the FOT and source wavelengths.
OPERATION 4
3OPERATION
3.1 Deactivating the Auto-Off Function
Note: At power-up, the FOT automatically performs a self-test before the
measurement mode is displayed.
When the FOT is battery powered, it is automatically in auto-off mode (unit powers
off after 10 minutes of inactivity). To deactivate the auto-off function,
1. Power off the FOT.
2. Press and hold λselect.
3. Press on/off, holding λselect until the unit enters measurement mode.
The auto-off marker should not be displayed.
Note: To reactivate the auto-off function, power on the unit with the AC adapter-
charger plugged in, then unplug the adapter. The auto-off marker should be
displayed.
3.2 Calibration
For optimum performance, the FOT should be calibrated before each test session as
follows:
1. Ensure that the detector port is capped.
2. Power on the FOT.
3. Press and hold λselect until CAL is displayed. The running lines on the
display indicate the calibration is in progress. After calibration, a dashed line is
displayed.
Note: If Err 1 is displayed, the calibration failed due to incident light on the detector.
Tighten detector cap, press any key to cancel the error message, then repeat
the calibration process.
3.3 Fiber Identification
To identify a fiber carrying a 2 kHz test signal,
1. Install the 2 kHz detection adapter on the detector port.
2. Place the fiber in the groove of the 2 kHz detection adapter and gently push
down the fiber. If the fiber carries a 2 kHz optical signal, the FOT beeps
2 seconds, and 2000 Hz is displayed.
3.4 Measuring Absolute Power
To measure absolute power,
1. If necessary, calibrate the FOT.
2. Install the appropriate connector adapter on the detector port, and connect the
fiber under test.
3. Press λselect to match the FOT and source wavelengths.

FOT-10A, FOT-20A, & FOT-30A 5
If the received signal is too low to be measured, a dashed line is displayed. If the
received signal is too high to be measured, the display flashes.
3.5 Reference Procedure (FOT-20A and FOT-30A)
When the FOT is in reference mode, the reference value is subtracted from the
power received so that the value displayed only refers to the loss created by the fiber
under test.
To store a reference value,
1. If necessary, calibrate the FOT.
2. Connect the light source to the FOT as shown below.
3. Power on the light source and activate the first wavelength.
4. Press dBm/W to select absolute mode.
5. Press λselect to match the FOT and source wavelengths.
6. Press ref to access reference mode.
7. Press and hold ref until the display reads 0.00 dB and the new reference value
appears in small digits.
The reference value just stored applies only to measurements taken at the current
wavelength. If you are using a dual-wavelength source, select the second wavelength
and repeat steps 4 to 7.
dBm
Power reading
nm
Power meter wavelength
EXFO
Test jumper
FOTLight source
Bulkhead connector Connector
adapter
Test ju m p er
EXFO
dBm
dB
Reference value (in dBm)
FOT-10A, FOT-20A, & FOT-30A 5
If the received signal is too low to be measured, a dashed line is displayed. If the
received signal is too high to be measured, the display flashes.
3.5 Reference Procedure (FOT-20A and FOT-30A)
When the FOT is in reference mode, the reference value is subtracted from the
power received so that the value displayed only refers to the loss created by the fiber
under test.
To store a reference value,
1. If necessary, calibrate the FOT.
2. Connect the light source to the FOT as shown below.
3. Power on the light source and activate the first wavelength.
4. Press dBm/W to select absolute mode.
5. Press λselect to match the FOT and source wavelengths.
6. Press ref to access reference mode.
7. Press and hold ref until the display reads 0.00 dB and the new reference value
appears in small digits.
The reference value just stored applies only to measurements taken at the current
wavelength. If you are using a dual-wavelength source, select the second wavelength
and repeat steps 4 to 7.
dBm
Power reading
nm
Power meter wavelength
EXFO
Test jumper
FOTLight source
Bulkhead connector Connector
adapter
Test ju m p er
EXFO
dBm
dB
Reference value (in dBm)
FOT-10A, FOT-20A, & FOT-30A 5
If the received signal is too low to be measured, a dashed line is displayed. If the
received signal is too high to be measured, the display flashes.
3.5 Reference Procedure (FOT-20A and FOT-30A)
When the FOT is in reference mode, the reference value is subtracted from the
power received so that the value displayed only refers to the loss created by the fiber
under test.
To store a reference value,
1. If necessary, calibrate the FOT.
2. Connect the light source to the FOT as shown below.
3. Power on the light source and activate the first wavelength.
4. Press dBm/W to select absolute mode.
5. Press λselect to match the FOT and source wavelengths.
6. Press ref to access reference mode.
7. Press and hold ref until the display reads 0.00 dB and the new reference value
appears in small digits.
The reference value just stored applies only to measurements taken at the current
wavelength. If you are using a dual-wavelength source, select the second wavelength
and repeat steps 4 to 7.
dBm
Power reading
nm
Power meter wavelength
EXFO
Test jumper
FOTLight source
Bulkhead connector Connector
adapter
Test ju m p er
EXFO
dBm
dB
Reference value (in dBm)

OPERATION 6
3.6 Loss Testing (FOT-20A and FOT-30A)
To perform loss testing,
1. Reference the FOT to the light source.
2. Power off the source unit.
3. Connect the reference test jumpers to the fiber under test as shown below.
4. Power on the light source and activate the first wavelength.
5. Press dBm/W to select absolute mode.
6. Press λselect to match the FOT and source wavelengths.
7. Press ref to access reference mode. The actual insertion loss of the fiber under
test is displayed.
8. To test at a second wavelength, select a wavelength on the source unit, and
repeat steps 5 to 7.
3.7 Source Operation (FOT-30A)
3.7.1 Turning the Source On or Off
1. Turn the source on by pressing and holding source until the source
wavelength and the 2kHz or CW marker are displayed.
2. Press CW/2 kHz to toggle between continuous and modulated signal output.
3. Turn the source off by pressing and holding source until the source
wavelength and the 2kHz or CW marker disappear.
3.7.2 Selecting the Source Wavelength
If your FOT-30A features a dual-wavelength source, press source to toggle between
the two wavelengths.
3.7.3 WaveWise Feature
The WaveWise feature allows accurate wavelength matching between two
FOT-30As, one used as a source and the other as a power meter while testing power
and loss. It requires no user-intervention. The source incoming wavelength is
automatically detected by the destination power meter.
EXFO
EXFO
Light source FOT
Fiber under test
Test jumper
Test jumper
OPERATION 6
3.6 Loss Testing (FOT-20A and FOT-30A)
To perform loss testing,
1. Reference the FOT to the light source.
2. Power off the source unit.
3. Connect the reference test jumpers to the fiber under test as shown below.
4. Power on the light source and activate the first wavelength.
5. Press dBm/W to select absolute mode.
6. Press λselect to match the FOT and source wavelengths.
7. Press ref to access reference mode. The actual insertion loss of the fiber under
test is displayed.
8. To test at a second wavelength, select a wavelength on the source unit, and
repeat steps 5 to 7.
3.7 Source Operation (FOT-30A)
3.7.1 Turning the Source On or Off
1. Turn the source on by pressing and holding source until the source
wavelength and the 2kHz or CW marker are displayed.
2. Press CW/2 kHz to toggle between continuous and modulated signal output.
3. Turn the source off by pressing and holding source until the source
wavelength and the 2kHz or CW marker disappear.
3.7.2 Selecting the Source Wavelength
If your FOT-30A features a dual-wavelength source, press source to toggle between
the two wavelengths.
3.7.3 WaveWise Feature
The WaveWise feature allows accurate wavelength matching between two
FOT-30As, one used as a source and the other as a power meter while testing power
and loss. It requires no user-intervention. The source incoming wavelength is
automatically detected by the destination power meter.
EXFO
EXFO
Light source FOT
Fiber under test
Test jumper
Test jumper
OPERATION 6
3.6 Loss Testing (FOT-20A and FOT-30A)
To perform loss testing,
1. Reference the FOT to the light source.
2. Power off the source unit.
3. Connect the reference test jumpers to the fiber under test as shown below.
4. Power on the light source and activate the first wavelength.
5. Press dBm/W to select absolute mode.
6. Press λselect to match the FOT and source wavelengths.
7. Press ref to access reference mode. The actual insertion loss of the fiber under
test is displayed.
8. To test at a second wavelength, select a wavelength on the source unit, and
repeat steps 5 to 7.
3.7 Source Operation (FOT-30A)
3.7.1 Turning the Source On or Off
1. Turn the source on by pressing and holding source until the source
wavelength and the 2kHz or CW marker are displayed.
2. Press CW/2 kHz to toggle between continuous and modulated signal output.
3. Turn the source off by pressing and holding source until the source
wavelength and the 2kHz or CW marker disappear.
3.7.2 Selecting the Source Wavelength
If your FOT-30A features a dual-wavelength source, press source to toggle between
the two wavelengths.
3.7.3 WaveWise Feature
The WaveWise feature allows accurate wavelength matching between two
FOT-30As, one used as a source and the other as a power meter while testing power
and loss. It requires no user-intervention. The source incoming wavelength is
automatically detected by the destination power meter.
EXFO
EXFO
Light source FOT
Fiber under test
Test jumper
Test jumper