Agilent Technologies N1996A-503 User Reference page 226

Mode
Distance To Fault
Measured Distance window at the top right, but must be greater than the start distance
previously entered. If you need a larger distance, reduce the frequency span by adjusting
the start and stop frequencies.
Mode
Min
Max
Key Path
226
Stimulus / Response
0 m (if Unit is Meters)
0 ft. (if Unit is Feet)
304.8 m (if Unit is Meters)
1000 ft. (if Unit is Feet)
FREQ/Channel, Stop Distance
Chapter 3