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Measurement Principles
R&S
®
RT-ZPR20
R&S
®
RT-ZPR40
27
User Manual 1800.5035.02 ─ 03
5.3
Input Impedance
The input signal loading caused by the probe is determined by its input impe-
dance Z
in
illustrates an equivalent circuit model. The resulting input
impedance versus frequency is indicated in
Figure 5-4: Example of the input impedance of the R&S
RT-ZPR20/40 probe with SMA
extension cable as a function of frequency
Input Impedance