Rohde & Schwarz R&S ZVA 8 - Page 184

Trace Menu R&S
®
ZVA/ZVB/ZVT
1145.1084.12 4.22 E-6
Z <– S11, Z <– S12, Z <– S21, Z <– S22
Select the 2-port matched-circuit, converted impedances. The parameters describe the impedances of a
2-port DUT, obtained in forward and reverse transmission and reflection measurements:
• Z
11
is the input impedance of a 2-port DUT that is terminated at its output with the reference
impedance Z
0
(matched-circuit impedance measured in a forward reflection measurement).
• Z
22
is the output impedance of a 2-port DUT that is terminated at its input with the reference
impedance Z
0
(matched-circuit impedance measured in a reverse reflection measurement).
• Z
12
and Z
21
denote the forward and reverse transfer impedances, respectively.
The analyzer can also provide matched-circuit impedances for more drive ports or balanced port
configurations; see More Impedances.
Use the More Z-Parameters dialog to measure open-circuit Z-parameters. Use the Smith chart to
obtain an alternative, graphical representation of the converted impedances in a reflection
measurement.
Remote
control:
CALCulate<Ch>:PARameter:MEASure "<Trace_Name>", "SZ11" | "SZ12"
| "SZ21" | "SZ22"
[SENSe<Ch/Tr>:]FUNCtion[:ON] "...:POWer:Z<11 | 12 | 21 | 22>"
Create new trace and select name and measurement parameter:
CALCulate<Ch>:PARameter:SDEFine "<Trace_Name>", "SZ11" | "SZ12"
| "SZ21" | "SY22"
More Impedances
Opens a dialog to select converted, matched-circuit impedance parameters for more ports or balanced
port measurements.
The notation for converted impedance parameters and the functionality of the More Impedances dialog
is analogous to the definition of S-parameters.
• Z<— selects the type (left pull-down list) and the port number assignment (right pull-down list)
of the impedance parameter. Mixed mode parameters are only available if a balanced port
configuration is active. They are expressed as Y
<mout><min>
, where <mout> and <min> denote the
output and input port modes. The port numbers are assigned in the order Y
<out>< in>
, where
<out> and <in> denote the output (response) and input (stimulus) port numbers of the DUT.