HP 54753A User Manual page 177

TDR Fundamentals
a concise presentation of the fundamentals of TDR and then relates these
fundamentals to the parameters that can be measured in actual test
situations. Before discussing these principles further we will briefly
review transmission line theory.
Figure 9-1
Voltage vs Time at a Particular Point on a Mismatched Transmission Line Driven with a Step of
Height E
i
9-3