EXFO FTB-7000 OTDR Series for FTB-500 - Manual (Page 106)

Testing Fibers in Advanced Mode
92 OTDR
Monitoring Fiber in Real-Time Mode
Monitoring Fiber 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
stop the Real Time mode (to change settings before launching the test) or
launch an acquisition with the current settings.
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. However, once an acquisition is launched, you cannot switch
back to real mode. You have to stop the acquisition or wait until the test is
complete.
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 μm and for D fiber, select 62.5 μm).
2. From the Wavelength list, ensure that the desired wavelength is
highlighted.
3. From the button bar, select Real Time.
To deactivate the real-time mode:
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If you only want to stop monitoring, press Stop Real Time.
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If you are ready to launch a test, press Start. All the wavelengths for
which boxes are selected will be tested (not only the highlighted one).
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