FOS-850/1300 FLUKE NETWORKS, FOS-850/1300 Datasheet - Page 3

• Manufacturer Part Number: FOS-850/1300
• Description: FIBER OPTIC METER
• Manufacturer: FLUKE NETWORKS

Specifications of FOS-850/1300

• Connector Type: Fixed ST
• Operating Temperature Range: 0°C To +40°C
• Lead Free Status / RoHS Status: na

The following equipment is required for servicing
the FOS:
Performance Tests
Use the following performance tests to confirm that
the FOM or FOS is working properly. If the FOM
or FOS fails any of these tests, it needs calibration
adjustments or repair.
FOM -10 dBm Checkout
1. Turn on the FOM and the three light sources.
2. Connect the light source to the reference power
3. Adjust the output of the source for a power
4. Set the FOM switch to the wavelength position
5. Connect the FOM to the light source using the
6. Disconnect the light source from the FOM.
FOM -50 dBm Checkout
1. Connect the 1300 nm light source to the optical
2. Set the optical attenuator for a power meter
3. Connect the FOM to the attenuator using the
2 ST/ST multimode fiber optic patch cables
Calibrated FOM
Digital multimeter
One ST/ST multimode fiber optic patch cable
Allow the FOM to warm up for 10 minutes.
Allow the sources to warm up according to the
manufacturer’s specifications.
Perform the remaining steps using the light
sources in the following order: (1) 850 nm, (2)
1550 nm, and (3) 1300 nm.
meter using a fiber optic patch cable.
meter reading of -10.00 0.05 dBm. Record this
reading as P o (power out) to use in step 5.
being tested.
patch cable from step 2.
Allow a few seconds for the reading to
stabilize; then verify that the reading is P o
attenuator.
Connect the attenuator to the reference power
meter using a second fiber optic patch cable.
reading of -50.00 0.05 dBm. Record this
reading as P o to use in step 4 .
patch cable connected to the reference power
meter.
0.25 dBm.
4. Allow a few seconds for the reading to
5. Turn off the DMM, FOM, and the light sources.
FOS Checkout
1. Connect the FOS to the calibrated FOM with a
2. Connect the FOM to a DMM with at least
3. Verify that the FOS output is -20 0.5 dBm
4. For a dual source, repeat steps 1 through 3 for
Disassembling and Reassembling
the FOM and FOS
To perform calibration adjustments for the FOM
and the FOS, you must disassemble them. When
you finish the adjustments, reassemble them. A
Phillips-head screwdriver is required for
disassembling and reassembling the FOM and FOS.
To disassemble the FOM or FOS, proceed as
follows:
1. Set the FOM or FOS switch to OFF.
2. Remove the battery door; then disconnect the
3. Remove the two Phillips screws found under
4. To remove the pca, remove the Phillips screw
To reassemble the FOM or FOS, proceed as
follows:
1. Reinsert the pca; then replace the screw that
2. Tuck the battery wires into the notch at the side
stabilize; then verify that the reading is P o 0.4
dBm.
Disconnect the FOM from the DMM.
Disconnect the fiber optic patch cables from the
attenuator, source, and FOM.
patch cable.
Turn the FOS on to the wavelength being tested
and let it stabilize for 20 minutes.
0.1 mV resolution.
Turn the FOM on and set the switch to the
wavelength being tested.
(-19.5 to -20.5 mV on the DMM).
each wavelength.
battery.
the battery door; then separate the top and
bottom cases.
near SW1; then lift out the pca.
holds the pca.
of the battery compartment.
Fiber Optic Meter/Source
Performance Tests
3