EXFO Optical Explorer - Measuring Power or Loss

Using the Power Checker
112 OX1
Measuring Power or Loss
Measuring Power or Loss
Measuring absolute power or link loss is done the same way, except for the
referencing step.
If you are working with a dual-channel unit, you can either select a single
wavelength, a pair of wavelengths, or let the unit automatically interpret
the received signal(s) from your PON network, to measure power. The
dual-channel unit supports the following wavelengths related to PON
networks:
³ 1490 nm – GPON
³ 1550 nm – RF Video
³ 1577 nm – XGS-PON
Note: The loss measurement is only possible when a single wavelength is
selected. If a pair of wavelengths or the automatic PON detection are
selected on a dual-channel unit, you can only perform power
measurements.
To perform power or loss measurements:
1. Inspect your fibers and clean them properly.
2. For loss measurements, reference your power checker to a light source
(see Setting Reference Values on Your Power Checker on page 110),
then deactivate the light source.
3. If you have used a single reference patchcord, disconnect it from the
power checker port only, then attach a second reference patchcord to
the power checker.
OR
If you have used two reference patchcords, disconnect both of them at
the bulkhead.