30
1. Turn on the OPM optical power meter and OLS optical light source. Allow the light source to stabilize
(minimum of 2 minutes).
2. If not using the WAVE ID feature, set both instruments to the desired test wavelength.
3. Select the appropriate fiber optic transmit and receive test jumpers. The fiber type of these jumpers
must match the fiber type of the link to be tested.
4. Wrap and secure the transmit jumper five times around the appropriate diameter mandrel.
Clean both ends of the transmit jumper!
5. Connect the transmit jumper to the multimode output port of the OLS.
6. Mount an adapter cap on the OPM that matches the free connector on the transmit jumper.
7. Connect the free end of the transmit jumper to the OPM.
If necessary, press the dB/dBm key to display optical power in dBm.
8. If measured output power is outside of the normal range (specified by manufacturer), clean all fiber
connections or replace the transmit jumper. Repeat steps 4 - 7.
9. To set the reference level at the current wavelength(s): on the OPM, press and hold the Ref/Set key
until the label HELD SET is displayed to store the currently measured level or pair of levels as the new
reference levels.
Once the new reference is set, the OPM switches to the loss dB measurement mode. The OPM
should display 0 dB ± 0.05 dB.
Note
: You may press the Ref/Set key to display the stored reference levels.
Note
: When setting references from multiple wavelength ID’d sources, allow several seconds prior to
setting the references for wavelengths to be ID’d and measured.
Set the Reference
Testing Multimode Links
Step I - Set the Reference (One Jumper Method)
Transmit jumper
OPM
0 dB
OLS
4
5
7
6
Mandrel wrap
