VeEX OTDR FX150+ Series, User Manual

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OTDR Series e-Manual, D07-00- 076P -RevD00 Page 59 of 109
External OPM connection screen
4. Select the connected external meter and tap
Connect . The OPM setup screen appears. If
the test unit, also has a built-in meter that is preferable, tap
Use Internal
.
6.11.2 Configure the OPM
When configuring the OPM, the meter must be referenced (calibrated) to the Laser Source
output.
6.11.2.1 Calibrating to Laser Source
To measure reference cable loss:
Note: For more information on patchcords, see 6.6.2 Fiber Patchcord .
1. Connect the LS to the OPM using a patch cord (Loopback Referencing).
2. Tap the green
dB button.
3. Go to OLS and select the laser wavelength and turn ON. The wavelength should match the
light source wavelength, unless Wave ID is available.
4. Press Set to record the 0.00 dB point. A reference point is established and the calibrated
LS can be connected to the far-end of the fiber to measure the loss. Pressing
Set
will
overwrite previously saved reference value(s).