EXFO FTB-1 - Manual (Page 124)

Working with Your Unit
114 FTB-1
Retrieving the GPS Location of Your Unit
To retrieve the GPS location of your unit:
1. Go outdoors with your unit.
2. If necessary, turn on your unit and wait for the startup sequence to
complete.
3. Ensure that the GPS USB key is connected to your unit.
I
MPORTANT
Always turn your unit on before connecting the GPS USB key to it.
Otherwise, the GPS key may not be detected properly.