EXFO FTB-7000 OTDR Series for FTB-500 - Manual (Page 95)

Testing Fibers in Advanced Mode
OTDR 81
Setting Pass/Fail Thresholds
4. Select the wavelength to which you want to apply the thresholds:
³
To apply the same pass/fail thresholds setup to trace acquisitions
performed at all wavelengths, press the Apply Settings to All
Wavelengths button.
OR
³
To specify a specific wavelength for which to set pass/fail
thresholds, select the desired wavelength from the Wavelengths
box and press Apply to confirm your changes.
Note: If you want to define thresholds for specific wavelengths, repeat steps 3 to 4
for each wavelength.
5. Press Apply to confirm the changes, then OK to return to the main
window.