Analog Input Clock and Trigger Names 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 |
|---|---|---|---|
| Sample Interval Counter (and Channel Clock) | Channel Clock or Interchannel Delay | AI Convert Clock | The E Series clock that directly causes analog-to-digital conversions |
| Points per Second (as Sample Rate) | Channels per Second | Conversions per Second | Units for specifying AI convert clock rate |
| Sample Timebase (and Channel Clock Timebase) | Timebase | AI Convert Clock Timebase | The clock that is divided down to produce the AI convert clock |
| Sample Interval | Timebase Divisor | AI Convert Clock Timebase Divisor | The number of AI Convert Timebase ticks used to divide down the AI Convert Timebase |
| Scan Interval Counter (and Scan Clock) | Scan Clock | Sample Clock | The clock that controls the time interval between samples. Each time the sample clock ticks (produces a pulse) one sample per channel is acquired. |
| Scans per Second (as scanRate) | Scans per Second | Samples per Channel per Second | Units for specifying sample acquisition rate (the sample rate) |
| Scan Timebase | Timebase | Sample Clock Timebase | The clock that is divided down to produce the sample clock |
| Scan Interval | Timebase Divisor | Sample Clock Timebase Divisor | The number of Sample Clock Timebase ticks used to divide down the Sample Clock Timebase |
| Start Trigger | Start Trigger | Start Trigger | The trigger that begins an acquisition |
| Stop Trigger | Stop Trigger | Reference Trigger | The trigger that creates the reference point between the pretrigger samples and the posttrigger samples |
| No Equivalent | Scan Clock Gating | Pause Trigger | The signal that pauses and resumes an acquisition |
| No Equivalent | ATCOUT | Analog Comparison Event | The signal from the analog comparator circuit, used most often for analog triggering |
| SCANCLK | SCANCLK | AI Hold Complete Event | A digital signal emitted by an E Series device when the analog signal to be converted by the analog-to-digital converter has been held |