Referencing your power meter to a source – EXFO EPM-ELS-50 User Manual

Page 13

EPM-50/ELS-50

Referencing Your Power Meter to a Source

In reference mode, your unit displays the loss created by the fiber under test only,
since a reference value is subtracted from the measured power.

Note:

You must set a reference value separately for each wavelength.

To reference the power meter to a source manually:
1. Using the proper adapter, connect a light source (such as ELS-50) to the

detector port of your power meter.

2. Activate the source at the desired wavelength.
3. Match the source and power meter wavelenghts using

Wavelength is displayed in the top left corner.

4. Hold down

for a few seconds. The power meter

stores the currently detected power as the new
reference power.
Reference power is displayed in the top right corner
(in dBm) and current loss reading is automatically
switched to dB.

5. Repeat the procedure for each wavelength you want to reference.

Note:

Once all desired wavelengths have been referenced, do not disconnect
the Reference Test Jumper from the source port until all measurements
have been done.

Light

source

Power

meter

Adapter

Reference

test jumper

Reference

test jumper

Bulkhead

connector