Rohde & Schwarz 1323.0012.03, User Manual

Page: 381 / 1014

VNA GUI Reference
R&S
®
ZNL/ZNLE
381 User Manual 1178.5966.02 ─ 07
Z11 / Z12 / Z21 / Z22
Selects one of the 2-port Chapter 8.3.2.2, "Z-Parameters" , on page 220 as a measured
quantity for the active trace. The Z-parameters describe the impedances of a DUT with
open output ports (I = 0).
The four 2-port Z-parameters can be interpreted as follows:
●
Z
11
is the input impedance, defined as the ratio of the voltage V
1
to the current I
1
,
measured at port 1 (forward measurement with open output, I
2
= 0).
●
Z
21
is the forward transfer impedance, defined as the ratio of the voltage V
2
to the
current I
1
(forward measurement with open output, I
2
= 0).
●
Z
12
is the reverse transfer impedance, defined as the ratio of the voltage V
1
to the
current I
2
(reverse measurement with open input, I
1
= 0).
●
Z
22
is the output impedance, defined as the ratio of the voltage V
2
to the current I
2
,
measured at port 2 (reverse measurement with open input, I
1
= 0).
Remote command:
CALCulate<Ch>:PARameter:MEASure "<Trace_Name>", "Z11" | "Z12" |
"Z21" | "Z22"
CALCulate<Ch>:PARameter:SDEFine "<Trace_Name>", "Z11" | "Z12" |
"Z21" | "Z22"
Balanced Ports...
Opens a dialog to define a balanced port configuration.
See Balanced Ports Dialog .
9.7.7 Stability Tab
Selects one of the three two port stability factors K, μ
1
or μ
2
as measured quantities. A
typical application of stability factors is to assess the stability of an amplifier. Stability
factors cannot be calculated in balanced port configurations.
Background information
Refer to Chapter 8.3.7, "Stability Factors" , on page 229.
Meas Softtool
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