Channel Menu R&S
®
ZVA/ZVB/ZVT
1145.1084.12 4.164 E-6
Def. Balanced Port
The Def. Balanced Port tab of the Balanced and Measured Ports dialog defines new balanced port
configurations and reference impedances for common and differential mode.
In principle, it is possible to combine any pair of two physical analyzer ports. An n-port analyzer
supports a maximum of n/2 (n even) or (n – 1)/2 (n odd) logical ports.
• Physical Port Numbers provides two drop-down lists to select a pair of different physical ports
to be connected to the logical (DUT) port.
• Reference Impedances provides input fields for the differential and common mode impedances.
• Select Logical Port Number shows the current port configuration. Clicking the table cells
updates the left Physical Port Numbers table and makes it easier to define new logical 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 a complex value. For balanced ports it is
possible to define separate complex reference impedances for differential and for common mode.
The default values for the balanced port reference impedances are derived from the (real) default
reference impedance of the physical analyzer ports (Z
0
= 50 ):
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