Exfo FTB-7000 OTDR for FTB-200 v2 Instrukcja Użytkownika Pobierz pdf (Strona 212)

Analyzing Traces with the Bidirectional Analysis Application

198 FTB-7000 Series

Creating Bidirectional Measurement Files

The A->B and B->A traces must respect the following criteria:

Note: The information such as the Cable ID and Fiber ID does not need to be the

same in the A->B and B->A files for the application to be able to generate

the bidirectional measurement.

Item To be valid...

Trace ³ Both must be unidirectional files (.trc or .sor files).

³ Only traces of native format or of Telcordia

(Bellcore) EXFO version 200 format can be

reanalyzed and be used to generate the

bidirectional measurement.

³ You can open traces of Telcordia (Bellcore)

non-EXFO version 200 format, but you cannot

reanalyze them. However, they can be used to

generate the bidirectional measurement.

Pulse width Must be identical or adjacent for both traces.

Pulses can be considered as adjacent when

(for example, 2.5 μs and 10 μs are adjacent, because 10

is equal to 2.5 x 4).

Fiber types Use only traces acquired using singlemode fibers.

Acquisition offset Must be set to zero for both traces.

Wavelengths At least one wavelength must be common to both trace

files. Only the wavelengths that are common to both

traces will be used to generate the bidirectional

measurement and will be saved along with the

bidirectional file.

biggest pulse 4 smallest pulse×≤

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Exfo FTB-7000 OTDR for FTB-200 v2 Instrukcja Użytkownika Strona 212