RF:Frequency Settling Property
- Updated2024-05-08
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RF:Frequency Settling Property
Short Name: Frequency Settling
Property of niRFSG
Configures the frequency settling time. Interpretation of this value depends on the Frequency Settling Units property.
Supported Devices: PXIe-5644/5645/5646, PXI/PXIe-5650/5651/5652, PXIe-5653/5654/5654 with PXIe-5696, PXIe-5673/5673E, PXIe-5830/5831/5832/5840/5841/5842
Default Value: 1.0
Valid Values:
| Device | Frequency Settling Units Property Value | ||
|---|---|---|---|
| Seconds After Lock | Seconds After I/O | Parts per million (PPM) (1E-6)2 | |
| PXIe-5644/5645/5646, PXI/PXIe-5650/5651/5652, PXIe-5673/5673E | 2 microseconds1 to 80 milliseconds, resolution of approximately 2 microseconds | 0 microseconds to 80 milliseconds, resolution of 1 microsecond | 1.0, 0.1, 0.01 |
| PXIe-5653 | 1.0, 0.1, 0.01, 0.001 | ||
| PXIe-5654/5654 with PXIe-5696 | Not supported | 0 microseconds to 65,535 microseconds, resolution of 1 microsecond | 1.0, 0.1, 0.01 |
| PXIe-5830/5831/5832/5840/5841/5842 | 1 microsecond1 to 10 seconds, resolution of 1 microsecond | 0 microseconds to 10 seconds, resolution of 1 microsecond | 1.0 to 0.01 |
| PXIe-5831/5832 with PXIe-5653 (using PXIe-3622 LO)3 | |||
| PXIe-5831/5832 with PXIe-5653 (using PXIe-5653 LO)3 | 2 microseconds1 to 80 milliseconds, resolution of approximately 2 microseconds | 0 microseconds to 80 milliseconds, resolution of 1 microsecond | |
1To ensure that the PLL lock stabilizes when the Frequency Settling Units property is set to Seconds After Lock, NI recommends a settling time of 128 microseconds, minimum, if the Loop Bandwidth property is set to Narrow. NI recommends a settling time of 16 microseconds, minimum, if the Loop Bandwidth property is set to Wide.
2Any specified PPM value that is above the acceptable minimum value is coerced down to the closest valid value.
3The valid values for this configuration depend on the module used as the LO source. Refer to the LO Source property for more information.
Related Topics
Remarks
The following table lists the characteristics of this property.
| Datatype |  |
| Permissions | Read/Write |
| High-level VIs | N/A |
| Channel-based | No |
| Resettable | Yes |