EXFO FTB-3930 MultiTest - Manual (Page 37)

Measuring Optical Return Loss
Multifunction Loss Tester 31
Performing ORL Reference and Setting ORL Zero Value
3. Connect a patchcord to the F
AS T ES T SM port.
4. Terminate the fiber as close as possible before the component under
test. Wrap it at least 10 turns around a mandrel or small diameter tool,
adding turns until the reading stabilizes.
5. Press OK to save the ORL zero value, then remove the termination.
To revert to the factory-default ORL zero value:
1. From the main window, select the ORL Meter tab.
2. Press Default ORL Zero.
Termination Component
under test FT
B
-3
930
MU
LT
IT
ES
T