EXFO FTB-7000 OTDR for FTB-200 v2 - Manual (Page 267)

Analyzing Traces with the Bidirectional Analysis Application
OTDR 253
Modifying Trace Analysis Settings
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The event detection thresholds:
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Splice loss detection threshold: Splice loss threshold for
detecting small non-reflective events during trace analysis.
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Reflectance detection threshold: Reflectance threshold for
detecting small reflective events during trace analysis.
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End-of-fiber detection threshold: End-of-fiber threshold for
detecting important event loss, which could compromise signal
transmission, during trace analysis.
The following table provides the default, minimum and maximum
threshold values.
Note: The event detection thresholds are not available when you work with a
trace in Telcordia (Bellcore) non-EXFO version 200 format.
These detection thresholds will also be used when you reanalyze the
traces manually.
Detection threshold Default Minimum Maximum
Splice loss (dB) 0.020 0.010 5.000
Reflectance (dB) –72.0 –78.0 –14.0
End-of-fiber (dB) 5.000 1.000 25.000
I
MPORTANT
Modifications to the detection thresholds alter the displayed traces
because the application automatically reanalyzes the current trace
and regenerates the bidirectional measurement.
All of the modified events will be lost and the events table will be
re-created. However, the span start and span end will not be reset
in the process.