EXFO FOT-930 Multifunction Loss Tester - Manual (Page 43)

Measuring Power or Loss
Multifunction Loss Tester 35
Referencing Your Power Meter to a Source
6. Press W/dBm/dB (F1/F2 key) until you get
dB units to retrieve the last saved reference.
OR
Press Reference (F1/F2 key) to save the
current power as the new reference.
Reference power appears (in dBm) and
current loss is automatically switched to dB.
7. Repeat the procedure for each wavelength you want to reference.
To receive the reference value from a compatible source:
1. Connect the source to your power meter (with or without a fiber under
test).
2. Use the source to emit the special signal that contains its power value.
For more information, refer to the source’s user guide.

When it detects the special signal, the power meter beeps. The
new reference power is displayed (in dBm) and current loss
reading is automatically switched to dB.

You cannot change the power meter wavelength, units or
reference power manually.