EXFO FTB-7000 OTDR Series for FTB-500 - Manual (Page 193)

Analyzing Traces and Events
OTDR 179
Opening Trace Files
Opening Trace Files
You can open as many trace files as there is available memory, except in
Template mode, which only allows you to open two files at a time
(reference trace and main trace).
For the application, all trace files are equal. For this reason, if you want a
particular trace to be considered as the reference trace, you must set it as
such (see Defining a Reference Trace on page 183).
Note: You cannot open bidirectional trace files in the OTDR test application. Use
the Bidirectional Analysis utility instead (see Analyzing Bidirectional Traces
on page 227).
When you open trace files, the application always displays the first
wavelength of the file.
Type of file Zoom Marker
Trace that has been saved with an
automatic zoom on the selected
event ( button was pressed)
Application
automatically zooms in
on the event that was
selected on the first
trace (wavelength) of
the file.
If you switch to the next
trace, the application
will automatically zoom
in on the event that was
selected for the second
trace.
Markers that are
displayed correspond to
those of the selected
event.