Measurement Principles
R&S
®
RT-ZS10E/10/20/30
33
User Manual 1410.3531.02 ─ 07
The resulting input impedance versus frequency is indicated in
Figure 4-8
. The
trace shows three characteristic areas that can be assigned to R
in
, C
in
and R
RF
.
The resulting loading of a step signal at the input of the probe is given in
Fig-
ure 4-9
.
The connection inductance L
con
has only a minor effect on the signal loading and
is therefore not considered in the following.
10
100
1 k
10 k
100 k
1 Meg
1 kHz
10 kHz
100 kHz
1 MHz
10 MHz
100 MHz
1 GHz
|Impedance| in Ohm
Frequency
in
C
1
in
R
RF
R
Figure 4-8: Magnitude of the input impedance of the R&S
RT
‑
ZS10/20/30 probe as a func-
tion of frequency
Signal Loading of the Input Signal
