EXFO FTB-7000 OTDR for FTB-200 v2 - Manual (Page 104)

Testing Fibers in Fault Finder Mode
90 FTB-7000 Series
Selecting the Distance Units
Selecting the Distance Units
You can select the distance units that will be used in the application.
The default distance units are the kilometers.
Note: The distance units used in Fault Finder mode are independent from the
ones used in the other OTDR modes (Auto, Advanced and Template).
Units used