Rohde & Schwarz 1145.1010.04/05/06, Operating Manual

Page: 315 / 813

R&S
®
ZVA/ZVB/ZVT Channel Menu
1145.1084.12 4.153 E-6
define the reference impedances at the ports.
The dialog contains the following additional controls:
•
If Same Connector Type at All Ports is active, the connector types at all ports (but not their
gender) are always adjusted to the current selection in the Connector column.
•
Measure "a" Waves at selects the analyzer frequency for the measurement of the reference
waves a
n
. Depending on the measured quantity, the reference waves can be measured at the
receiver or at the source frequency.
•
Freq Conv Off disables all frequency-converting modes, i.e. it resets all port frequencies to the
basic channel frequency and disables the Harmonics and the Mixer measurement (with option
R&S ZVA-K4).
Remote control: [SENSe<Ch>:]CORRection:COLLect:CONNection:PORTs ALL | SINGle
[SENSe<Ch>:]FREQuency:CONVersion:AWReceiver[:STATe]
Logical Port
Defines the properties of the logical (balanced) ports defined in the Balanced and Measured Ports
dialog. To display this section, at least one balanced port configuration must be defined and Logical
Ports – Ref Impedance must be selected in the Displayed Columns dialog.
•
# is the port number of the logical port. This number is independent of the physical port
numbers and of the ports that are combined to form a balanced port.
•
Ref Impedance shows the complex reference impedances of the ports.
Reference impedance settings
The default reference impedance for a physical port is equal to the reference impedance of the
connector type assigned to the port but can be defined as an arbitrary complex value (renormalization
of port impedances). By changing the reference impedance, it is possible to convert the measured
values at 50 (75 ) into values at arbitrary port impedances.
For balanced ports it is possible to define separate complex reference impedances for differential and
for common mode.