Table Of Contents

Configure Spectrum Frequency (Center Span) (G Dataflow)

Version:
    Last Modified: December 19, 2018

    Configures the span and center frequency of the spectrum read by NI-RFSA.

    A spectrum acquisition consists of data surrounding the center frequency.

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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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    frequency

    Center frequency, in hertz (Hz), in a spectrum acquisition.

    The NI-RFSA device you use determines the valid range. Refer to the specifications for your device for more information about frequency range.

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    span

    Span, in hertz (Hz), of a spectrum acquisition.

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    Note

    For the PXIe-5663E/5665/5667/5668, NI-RFSA enables dithering by default. The dither noise can appear in your passband and affect measurements. Refer to the Digitizer Dither Enabled property for more information about dithering.

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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.

    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-5601/5603/5605/5606 (external digitizer mode)
    • PXIe-5644/5645/5646
    • PXIe-5663E/5665/5667/5668
    • PXIe-5820/5840


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