HP 54753A User Manual page 183

Figure 9-6
TDR Displays for Typical Loads
These displays are easily interpreted by recalling this equation:
Knowledge of E
determined in terms of Z
verify that the reflections are actually from the terminations specified.
E Z – Z
ρ r L o
= ---- - = ----------------- -
E Z + Z
i L o
and E , as measured on the oscilloscope, allows Z
i r
, or vice versa. In Figure 9-6, for example, we may
o
TDR Fundamentals
Step Reflection Testing
to be
L
9-9