EXFO FastReporter 2 - Manual (Page 127)

Working with OTDR Files
Post Processing Software 117
Changing OTDR Settings
3. If you want to modify a threshold at this point, double-click in the
corresponding field, and enter the new value.
Note: If you are using the fiber attenuation section threshold, you can specify the
minimum section length at the bottom of the table.
Note: If there are more than one threshold value for a given wavelength, they are
separated by a semicolon.
4. If you are using the application’s event calculations and thresholds, you
can also select whether you want to include the span start and end
values.
Note: Some threshold values may not be available for older file versions.