NIRFSA_ATTR_REF_TRIGGER_OSP_DELAY_ENABLED
- Updated2024-05-08
- 2 minute(s) read
NIRFSA_ATTR_REF_TRIGGER_OSP_DELAY_ENABLED
Specific Attribute
| Data type |
Access | High Level Functions |
|---|---|---|
| ViInt32 | R/W | None |
Description
Specifies whether the digitizer OSP block delays Reference Triggers, along with the data samples, moving through the OSP block or if the Reference Triggers bypass the OSP block and are processed immediately.
Enabling this attribute requires the following equipment configurations:
- All digitizers being used must be the same model and hardware revision.
- All digitizers must use the same firmware.
- All digitizers must be configured with the same I/Q rate.
- All devices must use the same signal path.
PXIe-5663/5663E—Read the value of the NIRFSA_ATTR_IF_FILTER attribute to determine the IF filters used by the PXIe-5663/5663E.
PXIe-5665/5667/5668—Refer to the device-specific information in the NIRFSA_ATTR_DEVICE_INSTANTANEOUS_BANDWIDTH attribute to determine the IF filters used by the PXIe-5665/5667/5668. If you set the NIRFSA_ATTR_FFT_WIDTH attribute, refer to the device-specific information for this attribute and the NIRFSA_ATTR_DEVICE_INSTANTANEOUS_BANDWIDTH attribute to determine the IF filters used. For frequencies less than 3.6 GHz, set the NIRFSA_ATTR_RF_PREAMP_ENABLED to the same value for all devices.
PXIe-5665 14 GHz—Set the NIRFSA_ATTR_PRESELECTOR_ENABLED to the same value for all devices.
If the I/Q rate is set programmatically for I/Q acquisitions, the following attributes should be identical for the best device synchronization:
For spectrum acquisitions, the following attributes should be identical for the best device synchronization:
- NIRFSA_ATTR_SPECTRUM_SPAN
- NIRFSA_ATTR_RESOLUTION_BANDWIDTH_TYPE
- NIRFSA_ATTR_DIGITAL_IF_EQUALIZATION_ENABLED
- NIRFSA_ATTR_SPECTRUM_OSP_SAMPLING_RATIO
For more information about the digitizer OSP block and Reference Triggers, refer to the following topics in the NI High-Speed Digitizers Help:
- NI 5622 Onboard Signal Processing (OSP)
- NI 5142 Onboard Signal Processing (OSP)
- NI PXIe-5622 Trigger Sources
- NI PXI-5142 Trigger Sources
- NI PXIe-5622 Block Diagram
- NI PXI-5142 Trigger Sources
| NIRFSA_VAL_DISABLED (1900) | The Reference Triggers bypass the OSP block and are processed immediately. |
| NIRFSA_VAL_ENABLED (1901) | The Reference Triggers, along with the data samples, are delayed through the digitizer OSP block. |
Default Value: NIRFSA_VAL_ENABLED
Supported Devices:PXIe-5663/5663E/5665/5667/5668, PXIe-5820/5830/5831/5832/5840/5841