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Keysight Handheld Analyzers
N99xxA User’s Guide
5 TDR (Time Domain Reflectometry) - Option 215
CAT Mode Time Domain Reflectometry (TDR) measurements are generally 
used to locate problems, and identify the type of problem, in a length of cable 
or transmission line.
Settings that are NOT unique to TDR measurements are documented in 
Chapter 3, “CAT (Cable and Antenna Test) Mode”, on page  45.
In this chapter, the cable to be tested is referred to as the DUT (Device Under 
Test).
In this Chapter
“TDR Measurement (Format)” on page 74
“TDR Settings Table” on page 74
“TDR Start and Stop Distance” on page 75
“TDR Sweep” on page 75