R&S
®
ZVA / R&S
®
ZVB / R&S
®
ZVT GUI Reference
Channel Menu
Operating Manual 1145.1084.12 – 30 488
Restore the Default port assignment (matching port numbers of the analyzer and the cal unit).
This is important if the automatic detection of the port assignment fails.
Add and Delete port assignments. Multiple port assignments allow you to calibrate n analyzer
ports with an m-port calibration unit or calibration unit characterization, where m < n. See Using
Multiple Port Assignments below.
Missing Through data
One Path Two Port calibrations and Transmission Normalizations require two-port (Through)
characterization data for the cal unit, which is not available on older calibration units. If a tooltip indicates
missing two-port characterization data, simply perform a new characterization of your cal unit. In the first
dialog of the Characterization Wizard, make sure the cal unit is characterized for all calibration types
including One Path Two Port calibration.
[SENSe<Ch>:]CORRection:COLLect:AUTO
[SENSe<Ch>:]CORRection:COLLect:AUTO:PORTs
[SENSe<Ch>:]CORRection:COLLect:AUTO:PORTs:CONNection?
[SENSe<Ch>:]CORRection:COLLect:AUTO:PORTs:TYPE
[SENSe<Ch>:]CORRection:COLLect:AUTO:TYPE
[SENSe<Ch>:]CORRection:COLLect:AUTO:RPGRoup
Using Multiple Port Assignments
With multiple port assignments, it is possible to calibrate a number of analyzer ports that exceeds the
number of port of the calibration unit or cal unit characterization in use. E.g. you can use a 2-port
calibration unit R&S ZV-Z55, order no. 1164.0480.42, to perform a full 4-port calibration of a 4-port
network analyzer R&S ZVA50, order no. 1145.1110.52.
The multiple port assignment method considerably extends the range of applications of the calibration
units: A two-port unit is sufficient to perform a full n-port calibration of an arbitrary number of analyzer
ports. The method entails some loss of convenience because you have to re-connect the calibration unit
between the different calibration stages. It may also cause a loss of accuracy because only a sub-set of all
possible through connections is measured.
Multiple port assignments are defined in the Calibration Settings dialog; they are supported for Full One
Port, Full n-Port, and One Path Two Port calibrations.
To calibrate n network analyzer ports with an m-port calibration unit (m < n), you have to define an
appropriate set of port assignments and perform an automatic calibration for each assignment, observing
the correct cal unit connection. After measuring all port assignments, the analyzer will combine the
individual calibration data and calculate the required n-port error terms. As a rule, a given port
configuration and calibration type is compatible with many different sets of port assignments.
For Full n-Port calibrations, additional port assignments can improve the accuracy, provided that they add
more measured through connections.
The Calibration Settings dialog provides tooltips that assist you in defining the port assignments and
prevent inconsistent, insufficient, or redundant entries. The rules for a consistent, sufficient set of port
assignments depend on the calibration type as shown in the following table.
Recommendation ("Default" configuration)
Full One Port
Calibration
Each calibrated analyzer port must appear in
exactly one port assignment.
Subdivide the n analyzer ports into groups of m ports with
increasing port numbers. Create a separate port assignment for
each group.
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