NIRFSG_ATTR_REF_CLOCK_SOURCE
- Updated2025-02-03
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NIRFSG_ATTR_REF_CLOCK_SOURCE
| Numeric Value | Data type |
Access | Coercion | High Level Functions |
|---|---|---|---|---|
| 1150001 | ViString | R/W | None | niRFSG_ConfigureRefClock |
Description
Specifies the Reference Clock source. To set this attribute, the NI-RFSG device must be in the Configuration state. Only certain combinations of this attribute and the NIRFSG_ATTR_PXI_CHASSIS_CLK10_SOURCE attribute are valid, as shown in the following table.
 |
Note The PXI-5670/5671 and PXIe-5672 devices also allow you to drive the PXI 10 MHz backplane clock on PXI chassis only using the NIRFSG_ATTR_PXI_CHASSIS_CLK10_SOURCE attribute. |
Defined Values:
| NIRFSG_VAL_ONBOARD_CLOCK_STR | Uses the onboard Reference Clock as the clock source. PXIe-5830/5831—For the PXIe-5830, connect the PXIe-5820 REF IN connector to the PXIe-3621 REF OUT connector. For the PXIe-5831/5832, connect the PXIe-5820 REF IN connector to the PXIe-3622 REF OUT connector. PXIe-5831/5832 with PXIe-5653—Connect the PXIe-5820 REF IN connector to the PXIe-3622 REF OUT connector. Connect the PXIe-5653 REF OUT (10 MHz) connector to the PXIe-3622 REF IN connector. PXIe-5841 with PXIe-5655—Lock to the PXIe-5655 onboard clock. Connect the REF OUT connector on the PXIe-5655 to the PXIe-5841 REF IN connector. PXIe-5842—Lock to the PXIe-5655 onboard clock. Cables between modules are required as shown in the User Manual for the instrument. PXIe-5860—Lock to the PXIe-5860 onboard clock. |
| NIRFSG_VAL_CLK_IN_STR | Uses the clock signal present at the front panel CLK IN connector as the Reference Clock source. This value is not valid for the PXIe-5644/5645/5646 or PXIe-5820/5830/5831/5831 with PXIe-5653/5832/5832 with PXIe-5653/5840/5841/5841 with PXIe-5655. |
| NIRFSG_VAL_REF_IN_STR | Uses the clock signal present at the front panel REF IN connector as the Reference Clock source. PXIe-5830/5831—For the PXIe-5830, connect the PXIe-5820 REF IN connector to the PXIe-3621 REF OUT connector. For the PXIe-5831/5832, connect the PXIe-5820 REF IN connector to the PXIe-3622 REF OUT connector. For the PXIe-5830, lock the external signal to the PXIe-3621 REF IN connector. For the PXIe-5831/5832, lock the external signal to the PXIe-3622 REF IN connector. PXIe-5831/5832 with PXIe-5653—Connect the PXIe-5820 REF IN connector to the PXIe-3622 REF OUT connector. Connect the PXIe-5653 REF OUT (10 MHz) connector to the PXIe-3622 REF IN connector. Lock the external signal to the PXIe-5653 REF IN connector. PXIe-5841 with PXIe-5655—Lock to the signal at the REF IN connector on the associated PXIe-5655. Connect the PXIe-5655 REF OUT connector to the PXIe-5841 REF IN connector. PXIe-5842—Lock to the signal at the REF IN connector on the associated PXIe-5655. Cables between modules are required as shown in the User Manual for the instrument. PXIe-5860—Lock to the signal at the REF IN connector on the PXIe-5860. |
| NIRFSG_VAL_PXI_CLK_STR | Uses the PXI_CLK signal, which is present on the PXI backplane, as the Reference Clock source. |
| NIRFSG_VAL_REF_IN_2_STR | This value is not valid on any supported devices. |
| NIRFSG_VAL_PXI_CLK_MASTER_STR | This value is valid on only the PXIe-5831/5832 with PXIe-5653. PXIe-5831/5832 with PXIe-5653—NI-RFSG configures the PXIe-5653 to export the Reference clock and configures the PXIe-5820 and PXIe-3622 to use NIRFSG_VAL_PXI_CLK_STR as the Reference Clock source. Connect the PXIe-5653 REF OUT (10 MHz) connector to the PXI chassis REF IN connector. |
Default Value: NIRFSG_VAL_ONBOARD_CLOCK_STR
Supported Devices: PXI-5610, PXIe-5644/5645/5646, PXI/PXIe-5650/5651/5652, PXIe-5653/5654/5654 with PXIe-5696, PXI-5670/5671, PXIe-5672/5673/5673E, PXIe-5820/5830/5831/5832/5840/5841/5842/5860
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