2-13
IM AQ7280-01EN
Optical Pulse Measurement (OTDR)
2
Splice Loss, Return Loss, Splitter Loss, dB/km, Total Loss
Set the threshold values that are used to display fail judgment events.
Connector loss: Values greater than the threshold value are judged as fail. The range is 0.01 dB to 9.99 dB.
Splice loss: Values greater than the threshold value are judged as fail. The range is 0.01 dB to 9.99 dB.
Return loss: Values less than the threshold value are judged as fail. The range is 20 dB to 70 dB.
Splitter loss: Values greater than the threshold value are judged as fail. The range is 1.0 dB to 20.0 dB.
dB/km: Values greater than the threshold value are judged as fail. The range is 0.01 dB to 9.99 dB.
Total loss: Values greater than the threshold value are judged as fail. The range is 1 dB to 65 dB.
Because the end of fibers is handled as either a splice loss or a reflection, there is no fault event
just for the end of fibers.
Preset
Select the pass/fail judgment reference. Three splice loss threshold examples are defined.
Select the reference according to the optical connector’s insertion loss and splice loss included
in the optical fiber cable under measurement.
• Macro Bending (Bending Loss)
Using the rotary knob and ENTER, set Macro Bending to Setup[OFF] or Setup[ON]. The
following screen appears.
Turns the display on and off
Set the threshold (0.001dB to 99.999dB).
When an optical pulse measurement is performed in multi wavelength measurement, you can
compare the splice losses at each wavelength and display on the screen bending loss events
that are caused by bends in the optical fiber cable.
Display
This function displays the detected bending losses in the event list on the event screen when
optical pulses are measured.
OFF: The bending losses are not displayed in the event list.
ON: The bending losses are displayed in the event list.
Threshold
This is the threshold of the difference between the splice losses of each wavelength when optical
pulses are measured.
When the difference between the splice losses of each wavelength for the same event is larger
than this value, the event is detected as a bending loss.
2.1 Setting the Measurement and Analysis Conditions
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