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Keysight Handheld Analyzers 
N99xxB User’s Guide
4 DTF (Distance to Fault) Measurements
CAT Mode Distance to Fault (DTF) measurements are generally used to locate 
problems, or faults, in a length of cable or transmission line. In this chapter, the 
cable to be tested is referred to as the DUT (Device Under Test).
Settings that are NOT unique to DTF measurements are documented in the 
CAT Mode Chapter 3, “CAT (Cable and Antenna Test) Mode.”
In this Chapter
“How to make DTF Measurements” on page 52
“DTF Settings Table” on page 54
“DTF Measurement (Format)” on page 54
“DTF Start and Stop Distance” on page 55
“Frequency Mode” on page 55