EXFO IQS-12004B DWDM Passive Component Test System for IQS-500 - Manual (Page 128)

Referencing the System with MultiPath Testing Option
116 IQS-12004B
Performing Reference Measurements
Performing Reference Measurements
An IL reference is performed to compensate for any loss or spectral
non-uniformity of the launch-fiber connection to the WRM output port.
To perform an IL reference:
1. Connect output port 1 of the switch to channel 1 of the power meter.
2. Perform an IL reference measurement.
3. Repeat the above steps for each of the remaining switch output ports
by connecting the switch port to channel 1 of the power meter.
An IL/PDL reference is performed to compensate for any loss or spectral
non-uniformity of the launch fiber connection to the WRM output port.
To perform an IL/PDL reference:
Note: References are valid as long as rigid and semi-rigid patchcords do not
move.
1. Connect output port 1 of the switch to channel 1 of the power meter.
2. Perform an IL/PDL reference measurement.
3. Repeat the above steps for each of the remaining switch output ports
by connecting the switch port to channel 1 of the power meter.
The return-loss zero measurement provides a zero-reflection reference to
the WRM return loss detector. This reference will be used to compensate
for internal WRM parasitic reflections as well as parasitic reflections
originating at the WRM output/launch-fiber connector.
To perform an ORL zero-reference measurement:
1. Connect the launch fiber to output port 1 of the switch.
2. Mandrel the launch fiber.
3. Perform the measurement.
4. Repeat the preceding steps for each switch port.