EXFO FTB-700 for FTB-1 - Manual (Page 80)

Testing Fibers in Fault Finder Mode
72 FTB-700 Series
Acquiring Traces in Fault Finder Mode
3. From the Port list, specify to which port you connected your fiber.
4. Press Start or from the keypad. If the first connector
check feature is enabled, a message will appear if there is a problem
with the injection level (see Enabling or Disabling the First Connector
Check for Fault Finder on page 81).