Fluke DSX-8000 - Page 351

Chapter 11: The OptiFiber Pro OTDR Module
Settings for OTDR Tests
315
Manual
Settings:
Averaging
Time
Best Resolution: The tester adjusts the test settings to keep
dead zones to a minimum. This setting lets you see more
events in and around reflective events. The test usually
takes longer than a test with Auto or Quick Test selected.
Tests with Auto or Best Resolution selected can take up to
3 minutes per wavelength for some fibers.
3, 5, 10, 20, 40, 60, 90, 120, and 180 seconds per wavelength:
Longer times give these results:
 The trace has less noise, which increases the dynamic
range and increases the accuracy of measurements.
 You can see small events, such as splices, more clearly on
the trace.
 The tester makes more measurements, so the test takes
more time.
Shorter times give these results:
 The trace has more noise, which decreases the dynamic
range.
 The increased noise hides small events on the trace.
 The tester makes fewer measurements, so the test takes
less time.
Manual
Settings:
End Threshold
Lets you set the threshold (in decibels) for detection of the
end of the fiber. An event that is above the threshold is
shown as the end of the fiber. The range for this setting is
1 dB to 25 dB inclusive.
To set the threshold to Auto, tap Auto on the END
THRESHOLD screen.
For the SmartLoop OTDR test, the End Threshold is for
unconnected end of the tail fiber (not for each fiber).
-continued-
Table 12. Settings for OTDR Tests (continued)