Table Of Contents

Configure Ref Clock (G Dataflow)

Version:
    Last Modified: December 19, 2018

    Configures the NI-RFSG device Reference Clock.

    The Reference Clock ensures that the NI-RFSG devices are operating from a common timebase.

    The NI-RFSG device must be in the Configuration state before you call this node.

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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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    ref clock source

    Source of the Reference Clock signal.

    Name Description
    Onboard Clock

    Uses the onboard Reference Clock as the clock source.

    PXIe-5840 with PXIe-5653: Lock to the PXIe-5653 onboard clock. Connect the REF OUT (10 MHz) connector on the PXIe-5653 to the PXIe-5840 REF IN connector. Configure open NI-RFSA sessions to the device to use RefIn for the PXIe-5840 or RefIn2 for the PXIe-5840 with PXIe-5653.

    RefIn

    Uses the clock signal present at the front panel REF IN connector as the clock source.

    PXIe-5840 with PXIe-5653: Lock to the signal at the REF IN connector on the associated PXIe-5653. Connect the REF OUT (10 MHz) connector on the PXIe-5653 to the PXIe-5840 REF IN connector.

    PXI Clock

    Uses the PXI_CLK signal, which is present on the PXI backplane, as the clock source.

    ClkIn

    Uses the clock signal present at the front panel CLK IN connector as the clock source.

    RefIn2

    This value is valid on only the PXIe-5840 with PXIe-5653. NI-RFSG locks the Reference Clock to the clock sourced at the PXIe-5840 REF IN terminal that is already configured by an NI-RFSA session. Connect the PXIe-5840 REF OUT connector to the PXIe-5653 REF IN connector. Configure open NI-RFSA sessions to the device to use RefIn for the PXIe-5840 or Onboard Clock for the PXIe-5840 with PXIe-5653.

    PXI_ClkMaster

    This value is valid on only the PXIe-5840 with PXIe-5653. NI-RFSA configures the PXIe-5653 to export the Reference Clock, and configures the PXIe-5840 to use PXI_Clk. Connect the PXIe-5653 REF OUT (10 MHz) connector to the PXI chassis REF IN connector for this configuration. For best performance, configure all other devices in the system to use PXI_Clk as the Reference Clock source.

    Default: Onboard Clock

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    ref clock rate

    Reference Clock rate, in hertz (Hz).

    Automatic Reference Clock Detection

    Specifying the Reference Clock rate value as Auto allows NI-RFSG to either use the default Reference Clock rate for the device or automatically detect the Reference Clock rate, if auto-detection is supported on the device.

    Default: Auto (-1.0)

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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.

    Search within the programming environment to access the following installed examples:

    • RFSG Getting Started Single Tone Generation
    • RFSG Arbitrary Waveform Generation (Arb)
    • RFSG Getting Started Script (Script)

    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-5644/5645/5646
    • PXI/PXIe-5650/5651/5652, PXIe-5653/5654/5654 with PXIe-5696
    • PXIe-5673E
    • PXIe-5820/5840


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