EXFO FTB-7000 OTDR for FTB-200 v2 - Manual (Page 94)

Testing Fibers in Fault Finder Mode
80 FTB-7000 Series
Selecting the Default File Format for the Fault Finder Traces
Selecting the Default File Format for the Fault
Finder Traces
You can define the default file format the Fault Finder application will use
when you save your traces.
Note: The default file format used in Fault Finder mode are independent from the
file format used in Auto, Advanced or Template modes. There is one default
file format for Fault Finder and one default file format for the other OTDR
modes.
By default, traces are saved in native (.trc) format, but you can configure
your unit to save them in Bellcore (.sor) format.
You can only modify the file format from the Save File dialog box, which
means you need to save at least one trace in the desired format before it
becomes the new default file format.
Note: The application will only display this dialog box if you have activated the
feature to always be prompted when you save a file (see Enabling or
Disabling the Confirmation of Fault Finder File Name on page 82) and if you
did not disable the storage features.