EXFO FTB-7000 OTDR Series for FTB-500 - Manual (Page 131)

Customizing the Application
OTDR 117
Selecting the Distance Units
To select the distance units for your display:
1. From the main window, press the Setup button.
2. From the Setup dialog box, select the General tab.
3. In the Distance Unit list, select the distance units to display.
4. Press Apply to confirm the changes, then OK to return to the main
window.
Once you exit the Setup dialog box, in the bottom right-hand corner of the
trace display, you will notice that the distance unit abbreviation has
changed. It will read km for kilometers, mi for miles, or kf for kilofeet,
depending on your selection.