Pause Trigger Signal
- Updated2023-03-14
- 2 minute(s) read
Pause Trigger Signal
Use the Pause Trigger signal (PauseTrigger) to mask off samples in a DAQ sequence. When Pause Trigger is active, no samples occur, but Pause Trigger does not stop a sample that is in progress. The pause does not take effect until the beginning of the next sample.
When you generate analog or digital output signals, the generation pauses as soon as the pause trigger is asserted. If the source of the sample clock is the onboard clock, the generation resumes as soon as the pause trigger is deasserted, as shown in the following figure.
If you are using any signal other than the onboard clock as the source of the sample clock, the generation resumes as soon as the pause trigger is deasserted and another edge of the sample clock is received, as shown in the following figure.
The name of terminal using the Pause Trigger task can be queried using the Pause Trigger Terminal Property.
Using a
Digital Source
To use Pause Trigger, specify a source and a polarity. The source can be a PFI signal or one of several other internal signals on the TestScale backplane.
You also can specify whether the samples are paused when Pause Trigger is at a logic high or low level. Refer to the Device Routing in MAX topic in the NI-DAQmx Help or the LabVIEW Help for more information.
Using an
Analog Source
Some TestScale modules can generate a trigger based on an analog signal. In NI-DAQmx, this is called the Analog Comparison Event, depending on the trigger properties.
When you use an analog trigger source, the samples are paused when the Analog Comparison Event signal is at a high or low level, depending on the trigger properties. The analog trigger circuit must be configured by a simultaneously running analog input task.