Exfo FTB-7000 OTDR Series for FTB-500 Manual do Utilizador descarregar pdf (Página 197)

100

101

Analyzing Traces and Events

OTDR 183

Defining a Reference Trace

A reference trace is used to compare fibers within the same cable, monitor

fiber deterioration or compare fibers before and after installation. Once a

trace file has been opened, you can define it as the reference trace. The

application will then display it, in red, on the graph.

There is only one reference file open at a time. A trace cannot be a

reference and a main (current) trace at the same time.

A reference trace can be defined in both Advanced and Template modes.

³ In Template mode, the reference definition is automatic. To be able to

select Template mode, at least one trace must be already loaded.

Consequently, as soon as you select this mode, the application

automatically sets the loaded trace as the reference.

If several traces are loaded when you select Template mode, the

application will prompt you to identify which file you want to use as a

reference. All other files will be closed (you will be asked to save any

file that has been modified).

In Template mode, you cannot directly remove the reference state

from a file. You will have to switch to Advanced mode to remove it.

³ In Advanced mode, the reference definition is manual.

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