Analog Input Read Terminology in Traditional NI-DAQ (Legacy) and NI-DAQmx
The following table translates terms from Traditional NI-DAQ (Legacy) to NI-DAQmx for the C API and the LabVIEW API.
| Traditional NI-DAQ (Legacy) C API | Traditional NI-DAQ LabVIEW |
NI-DAQmx | Explanation |
|---|---|---|---|
| Reading, Voltage, Sample | Sample | Sample | A single measurement from a single channel |
| Scan | Scan | No Equivalent | A set of samples, one from each channel in the task |
| Sample Count | Scans per Buffer | Buffer Size (in Samples per Channel) | Method for specifying the buffer size |
| No Equivalent—the Sequential parameter in DAQ_Monitor is similar | Read/Search Mode | Relative To | Where to place the read position prior to adding the offset |
| No Equivalent | Read/Search Offset | Offset | After placing the read position, this offset is added to determine where the read takes place; all subsequent reads use this offset until the offset is changed |
| No Equivalent | Read Mark Scan | Current Read Position | The current read position |
| No Equivalent | Scan Backlog | Available Samples per Channel | The amount of unread data in the buffer |
| Retrieved | End of Data Scan | Total Samples per Channel Acquired | The total number of samples per channel acquired since the start of the task |
| Count | Total Scans to Acquire | Samples per Channel | The total number of samples to acquire |
| numPts | Number to Read | Number of Samples per Channel | The number of samples to read |