EXFO OTDR 2 - Manual (Page 72)

Testing Fibers
64 OTDR
Monitoring Fibers in Real-Time Mode
Monitoring Fibers in Real-Time Mode
The application allows you to immediately view sudden changes in the
fiber link. In this mode, the trace is refreshed instead of averaged until you
switch to average mode or stop the acquisition.
Note: You cannot reanalyze a trace in real-time mode.
Note: In real-time mode, the trace is refreshed at a slower rate when the graph
overview window is displayed.
Note: You can only use one wavelength at a time to monitor your fiber.
You can switch from real-time mode to the averaging time interval mode at
any time. You can also switch between wavelengths during an acquisition
(all wavelengths must be selected before starting the test).
To activate the real-time mode:
1. If your module supports singlemode, singlemode live, or multimode
wavelengths, specify the desired fiber type (for live-fiber testing, select
SM Live; for C fiber, select 50 m and for D fiber, select 62.5 m).
2. From the wavelength list, ensure that all the desired wavelengths are
selected.
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