AO Start Trigger Signal

You can use the AO Start Trigger signal (ao/StartTrigger) to initiate a waveform generation. If you do not use triggers, you begin a generation with a software command.

Using a Digital Source

To use ao/StartTrigger, specify a source and an edge. The source can be an external signal connected to any PFI or RTSI <0..6> pin. The source can also be one of several internal signals on your DAQ device. Refer to Device Routing in MAX in the NI-DAQmx Help for more information.

The following figure shows the timing requirements of the ao/StartTrigger digital source.

Using an Analog Source

When you use an analog trigger source, the waveform generation begins on the first rising edge of the Analog Comparison Event signal.

Outputting the AO Start Trigger Signal

You can configure the PFI 6/AO START TRIG pin to output the ao/StartTrigger signal. The output pin reflects the ao/StartTrigger signal regardless of what signal you specify as its source.

The output is an active high pulse. The following figure shows the timing behavior of the PFI 6/AO START TRIG pin when the pin is an output.

The PFI 6/AO START TRIG pin is configured as an input by default.