3-16
IM AQ1200-01EN
Macro Bending (Bending Loss)
When an optical pulse measurement is performed in Multi WL measurement mode, you can compare
the difference between the splice losses at wavelengths of 1310 nm and 1550 nm and display on the
screen bending loss events that are caused by bends in the fiber.
Display
This function displays the detected bending losses in the event list on the event screen when optical
pulses are measured.
On: The bending losses are displayed in the event list.
Off: The bending losses are not displayed in the event list.
Threshold
This is the threshold of the difference between the splice losses of the 1310 nm wavelength and the
1550 nm wavelength when optical pulses are measured.
When the difference between the splice losses of the two wavelengths for the same event is larger
than this value, the event is detected as a bending loss.
Detection of a bending loss
Move the cursor to a bending
loss event to display the values.
1550 nm wavelength
1310 nm wavelength
Bending loss events are displayed in this event list.
In this example, the current trace has been set to the waveform with 1550 nm wavelength.
The waveform with 1310 nm wavelength, which is the waveform being compared, is displayed in
gray.
If you switch the current trace to the waveform with 1310 nm wavelength, the waveform with 1550
nm wavelength, which is the waveform being compared, will be displayed in gray. In this situation,
the bending loss event for 1550 nm wavelength (event number 3) will be displayed on the waveform
with 1310 nm wavelength, which is the current trace.
Note
• If the waveforms of the two wavelengths are not being acquired, bending losses cannot be detected.
• The waveform being compared (displayed in gray) is not displayed when Display next to Macro Bending
is set to Off.
• For details on the event list, see chapter 7.
• For details on switching the current trace, see section 4.2.
3.6 Setting Analysis Conditions
