Table Of Contents

Self Calibrate (G Dataflow)

Version:
    Last Modified: December 19, 2018

    Performs self-calibration on the NI-RFSA device and associated modules that support self-calibration.

    If the self-calibration is successful, the new calibration constants are stored immediately to the nonvolatile memory of the module.

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    session in

    Instrument session obtained from Initialize With Options .

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    error in

    Error conditions that occur before this node runs.

    The node responds to this input according to standard error behavior.

    Standard Error Behavior

    Many nodes provide an error in input and an error out output so that the node can respond to and communicate errors that occur while code is running. The value of error in specifies whether an error occurred before the node runs. Most nodes respond to values of error in in a standard, predictable way.

    error in does not contain an error error in contains an error
    If no error occurred before the node runs, the node begins execution normally.

    If no error occurs while the node runs, it returns no error. If an error does occur while the node runs, it returns that error information as error out.

    If an error occurred before the node runs, the node does not execute. Instead, it returns the error in value as error out.

    Default: No error

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    steps to omit

    Calibration steps to skip during the self-calibration process.

    Name Description
    Preselector Alignment

    Omits the Preselector Alignment step. If you omit this step and Is Self Cal Valid indicates the calibration data for this step is invalid, the preselector alignment specifications are not guaranteed.

    This step applies only to the PXIe-5605/5606.

    Gain Reference Omits the Gain Reference step. If you omit this step and Is Self Cal Valid indicates the calibration data for this step is invalid, the absolute accuracy of the device is not guaranteed.
    IF Flatness Omits the IF Flatness step. If you omit this step and Is Self Cal Valid indicates the calibration data for this step is invalid, the IF flatness specifications are not guaranteed.
    Digitizer Self Cal Omits the Digitizer Self Cal step. If you omit this step and Is Self Cal Valid indicates the calibration data for this step is invalid, the absolute accuracy of the device is not guaranteed.
    LO Self Cal Omits the LO Self Cal step. If you omit this step and Is Self Cal Valid indicates the calibration data for this step is invalid, the LO PLL may fail to lock.
    Amplitude Accuracy Not used by this node.
    Residual LO Power Not used by this node.
    Image Suppression Not used by this node.
    Synthesizer Alignment Omits the Synthesizer Alignment step. If you omit this step and Is Self Cal Valid indicates the calibration data for this step is invalid, the synthesizer alignment specifications are not guaranteed.
    DC Offset Omits the DC Offset Step. If you omit this step and Is Self Cal Valid indicates the calibration data for this step is invalid, the DC offset specifications are not guaranteed.

    Default: The default value is an empty array, which indicates that all calibration steps are performed.

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    session out

    Reference to your instrument session passed to the next node.

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    error out

    Error information.

    The node produces this output according to standard error behavior.

    Standard Error Behavior

    Many nodes provide an error in input and an error out output so that the node can respond to and communicate errors that occur while code is running. The value of error in specifies whether an error occurred before the node runs. Most nodes respond to values of error in in a standard, predictable way.

    error in does not contain an error error in contains an error
    If no error occurred before the node runs, the node begins execution normally.

    If no error occurs while the node runs, it returns no error. If an error does occur while the node runs, it returns that error information as error out.

    If an error occurred before the node runs, the node does not execute. Instead, it returns the error in value as error out.

    Self-Calibration Best Practices

    For best results, NI recommends that you perform a complete self-calibration without omitting any steps. However, if Is Self Calibration Valid? indicates that the calibration data for a specific step is still valid, you can omit that step for faster execution.

    Open NI-RFSG Session for the PXIe-5820/5840

    If there is an existing NI-RFSG session open for the same PXIe-5820/5840 while this node runs, it may remain open but cannot be used for operations that access the hardware, for example NI-RFSG Commit or NI-RFSG Initiate.

    Device-Specific IF Flatness Step Time

    • The IF Flatness step can take approximately 15 minutes to complete on the PXIe-5665 (3.6 GHz) and approximately 25 minutes to complete on the PXIe-5665 (14 GHz).
    • The IF Flatness step can take approximately 1 minute to complete on the PXIe-5667 (3.6 GHz) and approximately 1.5 minutes to complete on the PXIe-5667 (7 GHz).
    • The IF Flatness step can take approximately 15 minutes to complete on the PXIe-5668.

    Where This Node Can Run:

    Desktop OS: Windows

    FPGA: Not supported

    Web Server: Not supported in VIs that run in a web application

    Hardware Support:

    This node supports the following hardware:

    • PXIe-5663E/5665/5667/5668
    • PXIe-5820/5840


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