EXFO FPM-600 Power Meter - Manual (Page 33)

Measuring Power or Loss (FPM-600 and FOT-600)
Power Meter/Light Source/Optical Loss Test Set 27
Measuring Power or Loss
Measuring Power or Loss
Measuring absolute power or link loss is done the same way, except for the
referencing step.
To perform power or loss measurements:
1. If necessary, perform an offset nulling (see Nulling Electrical Offsets on
page 19).
2. Check and clean your fibers appropriately for optimum performance
(see Cleaning and Connecting Optical Fibers on page 17).
3. For loss measurements, reference your power meter to a light source
(see Referencing Your Power Meter to a Source on page 24), then
deactivate the light source.
4. Using the proper adapter and test jumpers, connect a fiber under test
to a light source (such as FLS-600 or FOT-600) and to the detector port
of your unit.
Note: If you have referenced your power meter to a source, simply connect a fiber
under test to the test jumpers used for referencing.
5. Activate the source at the desired wavelength.
Fiber under test
Test
jumper
Test
jumper
Light source Power meter
Adapter
Bulkhead
connector
Bulkhead
connector