Rohde & Schwarz R&S ZVA 8 - Page 387

R&S
®
ZVA/ZVB/ZVT Channel Menu
1145.1084.12 4.225 E-6
type, provided that they are derived from a circuit model (Add/Modify Standard dialog).
•
The calculation of the (default) reference impedances for balanced ports (Def. Balanced Port
tab of the Balanced and Measured Ports dialog).
• The calculation of impedance and admittance parameters.
Storing connector type settings
Calibration kits and connector types are global resources; the parameters are stored independently and
available irrespective of the current setup. The connector type settings are always stored together with
the associated calibration kit parameters. It is possible to export and import the connector settings using
Export Kit... and Import Kit... in the Calibration Kits dialog.
The name, polarity and reference impedance of a user-defined connector can be changed in the table.
The
button in the Offset Model column opens the Offset Model dialog to define the propagation
mode in detail.
After assigning a calibration or adapter kit to a user-defined connector type, you can still change
its name, offset model and reference impedance. Switching between sexed and sexless will
delete all kits assigned to the connector type.
Remote control:
[SENSe<Ch>:]CORRection:CONNection
[SENSe<Ch>:]CORRection:CONNection:DELete
Offset Model Dialog
Defines the mode of wave propagation in the lines of the standards associated with the connector type.
This dialog is opened from the Available Connector Types dialog ( button in the table).
The Parameters to be selected depend on the Line Type:
• If the calibration kit standards contain lines with transverse electric propagation mode (TEM),
then the Relative Permittivity 
r
of the dielectric can be defined. The default permittivity is the
value for air. TEM-type lines have not cutoff frequency.
• If the calibration kit standards contain waveguides, then the lowest frequency where a wave
propagation is possible (Cutoff Frequency f
c
) can be defined. The default cutoff frequency if 0
Hz (propagation at all frequencies). No relative permittivity is needed for waveguides.
The impedance for waveguides is frequency-dependent. If a waveguide line type is selected,
various dialogs (e.g. Add Standard...) will indicate varies instead of a definite impedance value.