DO wave in step-ncreased frequency, possible?

[okll]

Using cDAQ 9174 + NI 9402 DIO,

To generate DO wave in gap-step-up mode,   Is it possible and how to set that step-increasment?

for example : one pulse-width + step-changing gap time between pulses

  

[John_P1]

Yes, you can do this with a digital output task by writing the correct waveform to the buffer, or with a buffered counter output task using implicit timing (see this example).  I'd suggest using the counter output (less data has to be transferred, higher timing resolution, easier to program).

Best Regards,

[okll]

"step-ncreased frequency"  shuld be  "step-ncreased duty cycle", or "dynamic duty cycle"

Thanks for you help.

"buffered counter" sounded like a good idea, I'll try how to buffer.

[okll]

This like Equivalent Time Sampling, but in Equivalent Time Sampling, gate signal is run in a fixed freauency.

for this step-ineased frequency signal, out signal is also itself gate signal,

reference http://www.ni.com/example/30252/en/