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Optical link loss
Setting the zero value of the power meter
It is important to set the zero of the power meter before making any mea-
surements where accuracy is required, as the noise from the photodiode
fluctuates over time and with variations in temperature.
1
Fix the plug over the optical input of the power meter so that no light can reach
the photodiode of the power meter. If the zero adjustment is made without this
plug, an error message may be displayed, as the photodiode will detect too much
light.
2
In the
Results
Carrying out the reference measurement
1
Fix the adapter corresponding to the jumper to the optical connector of the power
meter.
2
Connect the jumper between the input of the power meter and the output of the
source.
3
Configure the same wavelength on the source and the power meter.
The power measured is displayed in the results page of the LTS.
4
Press
Set as Reference
Measurements on the fiber under test
After defining the reference value, proceed as follows to make the measurement:
1
Fix the jumpers and connectors needed to connect the fiber to be tested between
the source output and the power meter input.
2
In the set-up menu, select dB units.
3
The power displayed in the Power Meter window corresponds to the optical loss
of the link tested. It can be displayed in the table (see
page
502).
page, press the
Zero
to save the result displayed as reference value.
User Manual
soft key.
78000010220 Rev. 024
Chapter 18 OFI Module
LTS function
"Table of results" on
505
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Table of Contents
Troubleshooting
