NIRFSA_ATTR_FETCH_RELATIVE_TO
- Updated2025-05-22
- 1 minute(s) read
NIRFSA_ATTR_FETCH_RELATIVE_TO
Specific Attribute
| Data type |
Access | High Level Functions |
|---|---|---|
| ViInt32 | R/W | None |
Description
Specifies the reference location within the acquired record from which to begin fetching.
Defined Values:| NIRFSA_VAL_MOST_RECENT_SAMPLE (700) | Fetching occurs relative to the most recently acquired data. The value of the NIRFSA_ATTR_FETCH_OFFSET attribute must be negative. |
| NIRFSA_VAL_FIRST_SAMPLE (701) | Fetching occurs at the first sample acquired by the device. If the device wraps its buffer, the first sample is no longer available. In this case, NI-RFSA returns an error if the fetch offset is in the overwritten data. |
| NIRFSA_VAL_REF_TRIGGER (702) | Fetching occurs relative to the Reference Trigger. This value behaves like NIRFSA_VAL_FIRST_SAMPLE if no Reference Trigger is configured. |
| NIRFSA_VAL_FIRST_PRETRIGGER_SAMPLE (703) | Fetching occurs relative to the first pretrigger sample acquired. |
| NIRFSA_VAL_CURRENT_READ_POSITION (704) | Fetching occurs after the last fetched sample. |
Default Value: N/A
Supported Devices: PXIe-5644/5645/5646, PXI-5661, PXIe-5663/5663E/5665/5667/5668, PXIe-5820/5830/5831/5832/5840/5841/5842/5860