Hello,
If I understood correctly you need to send an output or a pulse to initialize the motor, and then, this motor will provide a pulse that you want to use it to trigger an analog acquisition, right? If so, then you can do as you were saying of outputting through one of the PFI lines or you can use one of the AO to generate an output.
Now about acquiring the data, it will depend on how many samples you want to acquire on each pulse. If it is just one sample on each pulse, then you can do use the pulse coming out of the motor as a sample clock. You just configure your AI to use external clock and that pulse train coming from the motor you can use input it into one of the PFI lines as clock.
I hope this is what you were looking for.
Ricardo S.
Nati
onal Instruments.