niRFSG Configure Ref Clock VI

NI RF Signal Generators Help (NI-RFSG 18.1)


Edition Date: June 2018
Part Number: 371025V-01
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NI-RFSG 18.2.1 Help
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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 VI.

Supported Devices: PXIe-5644/5645/5646, PXI/PXIe-5650/5651/5652, PXIe-5653/5654/5654 with PXIe-5696, PXI-5670/5671, PXIe-5672/5673/5673E, PXIe-5820/5840

Related Topics

PFI Lines

Timing Configurations

Examples

niRFSG Configure Ref Clock

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instrument handle identifies your instrument session. instrument handle is obtained from either the niRFSG Initialize VI or the niRFSG Initialize With Options VI.

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ref clock source specifies the source of the Reference Clock signal.

Onboard Clock (default)

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.
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.

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ref clock rate specifies the Reference Clock rate, in hertz (Hz). The default value is Auto (-1.0), which allows NI-RFSG to use the default Reference Clock rate for the device or automatically detect the Reference Clock rate, if supported.

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error in describes error conditions that occur before this node runs. This input provides standard error in functionality.

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instrument handle out passes a reference to your instrument session to the next VI. instrument handle out is obtained from the niRFSG Initialize VI or the niRFSG Initialize With Options VI.

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error out contains error information. This output provides standard error out functionality.

Examples

Refer to the following VIs for examples of using the niRFSG Configure Ref Clock VI.

  • RFSG Getting Started Single Tone Generation VI: labview\examples\instr\niRFSG

  • RFSG Arbitrary Waveform Generation (Arb) VI: labview\examples\instr\niRFSG

  • RFSG Getting Started Script (Script) VI: labview\examples\instr\niRFSG

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