Analog Input Read Terminology in Traditional NI-DAQ (Legacy) and NI-DAQmx

NI-DAQmx Key Concepts

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