R&S ZVB - Page 125

R&S
®
ZVA / R&S
®
ZVB / R&S
®
ZVT GUI Reference
Trace Menu
Operating Manual 1145.1084.12 – 30 110
 c: Common mode (for balanced ports)
All possible combinations of mixed mode parameters (e.g. Sss, Scs, Sds, Sdd,..., Zss, Zcs,...) are
provided. Sss is used for unbalanced S-parameters if the balanced-unbalanced conversion is active;
otherwise the port mode indices ss are omitted.
The selected modes must be compatible with the port configuration. If an attempt is made to select an
incompatible parameter (e.g. a single-ended parameter for a balanced port), the analyzer displays an error
message.
Ratios
The Ratios submenu selects and defines ratios of wave quantities.
 b2/a1 Src Port 1, b1/a1 Src Port 1, b2/b1 Src Port 1, and b1/b2 Scr Port 1 select predefined ratios
of the standard 2-port wave quantities a
1
, a
2
, b
1
, and b
2
, to be measured in forward direction with
port 1 providing the stimulus signal.
 More Ratios opens a dialog to define and select arbitrary ratios of wave quantities for different
detectors and source ports or higher port numbers or frequency offsets. In true differential mode,
the dialog also offers ratios of balanced wave quantities.
In contrast to S-parameters, ratios are not system error corrected. A power calibration can be applied to
ratios; see Data Flow in the System Overview chapter.
b2/a1 Src Port 1, b1/a1 Src Port 1, b2/b1 Src Port 1, b1/b2 Src Port 1
Select predefined complex ratios of the standard 2-port wave quantities a
1
, a
2
, b
1
, and b
2
: