OTDR Series
e-Manual, D07-00-
076P
-RevD00
Page 68 of 109
Manual Test Setup (RxT-4113 only)
7.1.2.1 Test Parameters (all OTDR models)
•
Mode:
Manual, Auto, Manual Real Time, Auto Real Time, or V-Scout Profiles
•
Distance range (km, m, miles, kilofeet):
maximum value of measured distances; the
value of distance range should exceed the expected length of the fiber under test (20%
more). The distance unit type can be set in page 2 of
Test Setup
.
•
Pulse Width, ns
: the value of the optical pulse duration; the range of available optical
pulse values depend on the selected distance range and is set by the OTDR software
automatically (10 nsec pulse ~ 1 meter). Short pulse widths provide better resolution
and produce the best event and attenuation dead zones. Short pulse widths, however,
inject less optical energy into the Fiber-Under-Test (FUT), resulting in a noisier trace
and lower dynamic range. Longer pulse widths provide the highest dynamic range and
are used to test long fibers.
•
Resolution, m
: distance between two data points (sampling interval) of the trace;
values depend on the selected distance range. Select smallest value to measure events
spaced close together and use largest value to for longer ranges. Auto mode will deter-
mine best value for Fiber Under Test
•
Measurement time, min:sec
: determines the duration of measurement process with
averaging. Use Live mode to perform monitoring of the fiber in Real Time. Longer
averaging time improves the SNR and produces a “smoother” trace.
•
Optimized For: Select Test Mode:
Automatic DR/DZ, maximize dynamic range (DR
mode) or best deadzone, sacrifice range (DZ mode)
Содержание OTDR FX150+ Series
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