Exfo FTB-7000 OTDR for FTB-200 v2 Uživatelský manuál stáhnout pdf (Strana 267)

Analyzing Traces with the Bidirectional Analysis Application

OTDR 253

Modifying Trace Analysis Settings

³ The event detection thresholds:

³ Splice loss detection threshold: Splice loss threshold for

detecting small non-reflective events during trace analysis.

³ Reflectance detection threshold: Reflectance threshold for

detecting small reflective events during trace analysis.

³ 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

IMPORTANT

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.

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Exfo FTB-7000 OTDR for FTB-200 v2 Uživatelský manuál Strana 267