2-25
IM AQ7280-01EN
Optical Pulse Measurement (OTDR)
1
2
3
4
5
6
7
8
Index
Explanation
Selecting the Route
Before starting the fault locator feature, you can select the route in which to search for breaks. After
confirming the route, press ENTER. The optimal measurement conditions for the selected route will
automatically be selected.
Normal
Measures between the OLT and ONU.
This route does not have an optical
splitter.
OLT->Splitter
Measures between the OLT and optical
splitter.
OLT->Splitter->ONU
Measures from the OLT side to the ONU
side. This route has an optical splitter.
ONU->Splitter
Measures between an ONU and optical
splitter.
ONU->Splitter->OLT
Measures from the ONU side to the OLT
side. This route has an optical splitter.
Fault Location Display
The fault locator uses averaged measurements to detect faults. The cursor position is automatically
set to a fault location on the waveform, and the distance from the measurement reference point to the
fault is displayed.
Faults are not detected during real-time measurement. During a fault locator’s real-time measurement,
you can perform cursor operations or select the wavelength during measurements. If you cancel
measurements prematurely, faults will not be detected.
2.4 Performing Averaged Measurement and Measuring the Distances to Breaks