How can I Create a software analog trigger for a counter (6602)

[lai]

Hi ?
I need a software trigger (variable trigger level) for a rising trigger slope of a PWM signal.
So is there any possibility to start the PWM measurement at a special PWM-voltage level?
Or could I at, in front of the Counter an AnalogIn and generate there a fast (< 1?s?) RTSI signal for the counter?
Thanks

[Eric Meyer]

You cannot use a counter board for analog triggering. You can use an MIO board. Some models have built-in analog triggering, other used a software-based conditional retrieval. You could use an MIO board to receive the trigger and pass a digital "start scan" signal off to the counter board through Trig1 using RTSI.

regards,
Eric Meyer
National Instruments