4-25
IM AQ7280-01EN
Optical
Pulse Analysis
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Index
• Editing the Distance
When you change the distance of an event, the section group index (section IOR) is recalculated.
When the event cannot be set at the specified position, the distance is adjusted to a position
where the event can be set.
Changing the distance of an event affects the values of other events.
You cannot change the distance of the distance reference (point R).
• Editing the Return Loss
When you change the return loss of an event, the backscatter level is recalculated. The return
losses of other events are measured on the basis of the recalculated backscatter level.
• Editing the Section Group Index (Section IOR)
When you change the section group index (section IOR) of an event, the distance is recalculated.
You cannot change the section group index (section IOR) of the distance reference (point R).
• Editing the Event Type
You can change the event type. For details on event type, see page 4-16.
Displaying Macro Bending (Bending Loss) Events
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.
Displaying Events
Press the
Macro Bending
soft key to display the following menu.
Selects the current trace
Move the cursor to a
bending loss event to
display the values.
1310 nm wavelength
1550 nm wavelength
Bending loss events are
displayed in this event
list.
In this example, the current trace has been set to the waveform with 1310 nm wavelength. The
bending loss event for 1550 nm wavelength (event number 1) will be displayed on the waveform
with 1310 nm wavelength, which is the current trace.
Displaying Bending loss Events during Measurement
To display bending loss events during measurement, perform multi wavelength measurement (at
least two wavelengths from 1310 nm, 1490 nm, 1550 nm, and 1625 nm).
Note
If the waveforms of the two wavelengths are not being acquired, bending losses cannot be detected.
4.2 Analyzing Events
