EXFO EPM-500 Power Meter - Manual (Page 18)

Measuring Power or Loss (EPM-500 and EOT-500) 13
4. Using the proper adapter and test jumpers, connect a fiber under test to a light
source (such as ELS-500 or EOT-500) 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.
6. Match the source and power meter wavelengths:
³
If the source emits an auto-wavelength signal
or is in auto-switching mode (see
Automatically Detecting Wavelength on
page 14 and see Using Auto-Switching Mode
on page 17), the power meter automatically
matches the source wavelength.
OR
³
Press to switch between calibrated wavelengths.
When the unit detects a modulated signal, it beeps and displays the modulation
value and average measured power or loss (see left illustration above). You may
notice a slightly unstable last digit.
7. If necessary, change the displayed units by pressing .
8. Repeat the procedure for other wavelengths.
Fiber under test
Test
jumper
Test
jumper
Light
source
Power
meter
Adapter
Bulkhead
connector
Bulkhead
connector
When power or loss is outside power limits
(see Technical Specifications on page 38)
Actual power or loss
of fiber under test
Modulation detected