EXFO MAX-700 - Manual (Page 147)

Analyzing Traces and Events
MAX-700 135
Viewing and Modifying Current Trace Settings
Viewing and Modifying Current Trace Settings
You can view the trace parameters and modify them at your convenience.
Note: Parameter modification is only possible in Advanced mode.
You can modify the index of refraction (IOR) also known as group index,
Rayleigh backscatter (RBS) coefficient and helix factor for the displayed
trace.
Modifications you make are only applied to the current trace (that is, to a
particular wavelength), not to all traces.
The application will only prompt you to reanalyze the trace if you modify
the RBS coefficient (no analysis necessary when you modify the IOR or
helix factor).