Measurement Principles
R&S
®
RT-ZPR20
R&S
®
RT-ZPR40
25
User Manual 1800.5035.02 ─ 03
Abbreviation Description
V
S
Voltage at the test point without probe connected
V
in
Voltage at the test point with probe connected, corresponds to the input volt-
age of the probe
R
S
Source impedance of the DUT
R
in
DC input resistance of the probe
R
RF
RF input resistance
C
in
Coupling capacitance
L
con
Parasitic inductance of the ground connection
5.1
Step Response
shows the step response of the R&S
RT-ZPR20/40 with an ideal input
step.
Figure 5-2: Example of the step response of the R&S
RT-ZPR20/40 probe with the sup-
plied SMA extension cable
Step Response
