HP 54753A User Manual page 162

Measuring Common Mode Impedance
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Figure 8-9
Differential TDR Measurements
Measuring Differential and Common Mode Impedance
We are now ready to measure the common mode impedance of the differential
line. This section assumes that the differential mode impedance section has
been completed and that the oscilloscope settings have not been changed.
Press the TDR/TDT Setup
Press the Stimulus softkey and select
Press the softkey.
Enter
Press the TDR response 1 differential . . .
Press the Response softkey and select
Press the softkey.
Enter
Press the Done softkey (Figure 8-9).
The common mode impedance of two 50 ohm uncoupled lines is 25 ohms.
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key.
common mode
softkey.
common mode
.
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