Exfo FTB-7000 OTDR Series for FTB-500 Uživatelský manuál stáhnout pdf (Strana 167)

100

101

Analyzing Traces and Events

OTDR 153

Viewing and Modifying Current Trace Settings

You can view the trace parameters and modify them at your convenience.

Note: Parameter modification is only possible in Advanced mode and in Auto

mode (if you selected the Enable Editing for Current Trace Settings in the

Mode tab). For more information on the activation and deactivation of this

feature, see Testing Fibers in Auto Mode on page 57.

Two groups of parameters can be changed:

³ Fiber settings: index of refraction (IOR) also known as group index,

Rayleigh backscatter (RBS) coefficient, and helix factor.

³ Analysis detection thresholds: for splice loss, reflectance, and

end-of-fiber detection.

Modifications you make are only applied to the current trace (that is, to a

particular wavelength), not to all traces.

These modifications alter the displayed traces. These settings will also be

used when you reanalyze the trace.

The application will only prompt you to reanalyze the trace if you modify

the RBS coefficient (no analysis necessary when you modify the IOR or

helix factor). If you want to modify the parameters that will be used for

future acquisitions, see Setting the IOR, RBS Coefficient, and Helix Factor

on page 69 and Setting the Analysis Detection Thresholds on page 167.

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