NIRFSA_ATTR_FETCH_RELATIVE_TO
Specific Attribute
| Data type |
Access | High Level Functions |
|---|---|---|
| ViInt32 | R/W | None |
Description
Specifies the absolute location within the acquired record from which to begin fetching.
Defined Values:
| NIRFSA_VAL_MOST_RECENT_SAMPLE (700) | Specifies that fetching occur relative to the most recently acquired data. NIRFSA_ATTR_FETCH_OFFSET must be negative. |
| NIRFSA_VAL_FIRST_SAMPLE (701) | Specifies that fetching occurs at the first sample acquired by the device. If the device wraps its buffer, then 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) | Specifies that fetching occur 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) | Specifies that fetching occur relative to the first pretrigger sample acquired. This value behaves like NIRFSA_VAL_FIRST_SAMPLE if no Reference trigger is configured. |
| NIRFSA_VAL_CURRENT_READ_POSITION (704) | Specifies that fetching occur after the last fetched sample. |