EXFO FTB -5240S/5240BP Optical Spectrum Analyzer - Manual (Page 305)

Managing Results
OSA 299
Managing Spectral Transmittance Test Results
Swapping Spectral Transmittance Traces
The Swap Trace feature allows you to swap spectral transmittance input
and output traces. With this feature, the input trace is replaced with the
output trace and vice versa. All results are recalculated.
Note: The swap trace feature will not be available if there are no traces in the
application.
To swap spectral transmittance traces:
From the Main Menu, press Swap Traces.
All the parameters in the application will be updated according to the
modified traces.