RFmxVNA Calibration Initiate VI

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Updated2025-10-13
3 minute(s) read

Determines the set of calibration standard measurements required for performing calibration with the sweep and calibration settings that you configure. Call this VI after configuring all the appropriate sweep and calibration settings such as Frequency Settings, Power Level and Test Receiver attenuation settings, IF Bandwidth, Calkit and Cal Method related settings etc.

After you call this VI, you can query number of distinct physical connection steps using Cal Step Count. To understand the physical connection required in a given cal step, query Cal Step Description property. You can refer to following sequence of operations to better understand the usage of this VI in a typical calibration routine.

[START] -> ... -> [Select Measurement] -> [Configure Sweep Settings] -> [Configure Calibration Settings] -> [Call RFmxVNA Auto Detect vCal Orientation VI] -> [Call RFmxVNA Calibration Initiate VI] -> [Query Cal Step Count] -> [Query and make connection as per Cal Step Description for Step<m>] -> [Call RFmxVNA Calibration Acquire VI for Step<m>] -> [Query and make connection as per Cal Step Description for Step<n>] -> [Call RFmxVNA Calibration Acquire VI for Step<n>] -> [Call RFmxVNA Calibration Save VI] -> [Call RFmxVNA Calset Save to File VI] -> ...-> [END].

Note

You must select SParams or Wave measurement before calling this VI.
After calling this VI, if you change any sweep and calibration setting, you must call this VI again to commit the change(s) to said sweep and calibration setting(s).

Inputs/Outputs

Selector String —

Selector String specifies a selector string comprising of the signal name. If you do not specify the signal name, the default signal instance is used. The default value is "" (empty string).

Example:

"signal::mysignal1"

You can use the RFmxVNA Build Signal String VI to build the selector string.