EXFO FTB-7000 OTDR for FTB-200 v2 - Manual (Page 217)

Analyzing Traces with the Bidirectional Analysis Application
OTDR 203
Displaying Traces and Bidirectional Measurement
To switch from one wavelength to another:
From the main window, use the
buttons.
Note: You can also use from the keypad.
To switch from one
wavelength to another
(available only when A->B
and B->A traces contain
multiple wavelengths).