R&S ZVB - Page 124

R&S
®
ZVA / R&S
®
ZVB / R&S
®
ZVT GUI Reference
Trace Menu
Operating Manual 1145.1084.12 – 30 109
 S-Parameter selects the type (left pull-down list) and the port number assignment (right pull-down
list) of the S-parameter. Mixed mode parameters are only available if a balanced port
configuration is active. They are expressed as S
<mout><min>
, where <mout> and <min> denote the
output and input port modes. The port numbers are assigned in the order S
<out>< in>
, where <out>
and <in> denote the output (response) and input (stimulus) port numbers of the DUT.
 The graphics in the Port Configuration panel depicts the current port configuration. Balanced and
Measured Ports opens the Balanced Port and Port Groups dialog to define the properties of the
test ports. Single-ended (unbalanced) S-parameters are assigned to the physical test ports of the
analyzer. Balanced S-parameters are assigned to logical test ports. Selecting a balanced port
configuration with logical test ports means that the unbalance-balance conversion is switched on
and that the analyzer provides mixed mode S-parameters.
 Detector selects the algorithm that is used to calculate the displayed trace from the individual
measurement points. In the average (AVG) detector mode, it is possible to define the detector
observation time (Meas. Time) for each single measurement point. The average detector is
particularly suitable for S-parameter measurements in parallel to a noise figure measurement
(option R&S ZVAB-K30), where an alternative reduction of the measurement bandwidth is not
possible. For an overview of detector settings refer to section Detector.
The port configuration is valid for all traces in the channel
The settings made in the Balanced and Measured Ports dialog are channel settings and therefore apply to
all traces assigned to the channel (Balanced and Measured Ports is also accessible through Channel –
Mode – Port Config...). Within a channel the analyzer measures either single-ended or mixed mode
parameters. If a balanced test port configuration is selected the single-ended parameters assigned to the
channel are converted into mixed mode parameters.
Remote
control:
CALCulate<Ch>:PARameter:MEASure "<Trace_Name>", "S11" | "S12" |
"S21" | "S22"
[SENSe<Chn>:]FUNCtion[:ON] "...:POWer:S<11 | 12 | 21 | 22>"
Create new trace and select name and measurement parameter:
CALCulate<Ch>:PARameter:SDEFine "<Trace_Name>", "S11" | "S12" |
"S21" | "S22"
Use CALCulate<Ch>:PARameter:DEFine:SGRoup to create traces for all S-
parameters associated with a group of logical ports.
Single-Ended and Mixed Mode Parameters
The analyzer measures single-ended (unbalanced) parameters (S-parameters, impedances, admittances,
Z-parameters, Y-parameters) unless a balanced port configuration is selected. In the More S-Parameters
dialog and the analogous dialogs for the other quantities, the left parameter selection field shows the
parameter type (S, Y, Z) and is disabled (grayed). The range of output and input port numbers <out> and
<in> depends on the analyzer model.
The analyzer switches to mixed mode parameter measurement if a balanced port configuration is
selected. The left parameter selection field is enabled and offers a selection of matrices S
<mout><min>
(or
Z
<mout><min>
, ...) where <mout> and <min> denote the output and input port modes. The following three
output or input modes are available:
 s: Single-ended (for unbalanced ports)
 d: Differential mode (for balanced ports)