HP 54753A - Page 160

Differential TDR Measurements
Measuring Differential and Common Mode Impedance
8-12
7 Press the Alternate scale . . . softkey.
8 Press the
Units
softkey and select Ohm.
9 Press the
Enter softkey.
10 Press the
Done softkey(Figure 8-7).
Figure 8-7
Both channel waveforms have positive going steps because ohms is always
positive in a passive system.
We will now measure the differential line impedance.
1 Press the TDR/TDT Setup key.
2 Press the
TDR response 1 off . . . softkey.
3 Press the
Response softkey and select differential.
4 Press the
Enter softkey.
5 Press the
Done softkey (Figure 8-8).