R&S ZVB - Page 123

R&S
®
ZVA / R&S
®
ZVB / R&S
®
ZVT GUI Reference
Trace Menu
Operating Manual 1145.1084.12 – 30 108
"S21" | "S22"
Use CALCulate<Ch>:PARameter:DEFine:SGRoup to create traces for all S-
parameters associated with a group of logical ports.
S-Parameters in Frequency Conversion Measurements
The concept of S-parameters can be extended to a- and b-waves with different frequencies ("arbitrary" S-
parameters). The network analyzer provides arbitrary S-parameters for the following frequency conversion
measurement modes:
 Scalar mixer measurements
 Vector mixer measurements
In an arbitrary frequency conversion test setup, it is possible to measure reflection coefficients (S
11
, S
22
...)
at ports with equal source and receive frequency (see Port Configuration dialog), provided that and a one-
port calibration is available.
At present, arbitrary S-parameter measurements are not suited for balanced ports and true differential
mode.
Arbitrary S-parameters require a special calibration type; see background information in section
Correction Off. When a frequency conversion mode is activated, the analyzer checks which of the S-
parameters actually involve a- and b-waves with different frequencies. Only these S-parameters are
calculated (and should be calibrated) according to the rules for arbitrary S-parameters.
Example: Transmission measurement between ports 1 and 2 at the channel base frequency f
b
. Port 3 is
activated as an additional CW source port. This does not affect the calculation and calibration of the two-
port S-parameters S
11
, S
12
, S
21
, S
22
.
More S-Parameters
Opens a dialog to select S-parameters for multiport measurements (including the 2-port S-parameters) or
mixed mode S-parameters.
The More S-Parameters dialog provides the following settings: