how to program code about Timing Acquisition

[boblv1234]

I need to write a sound acquisition program, the signal duration is 3 seconds, I would like to make a continuous collection, but each time immediately after collecting 0.2 seconds for FFT analysis and save. Set of three boxes on the front panel display to show three consecutive 0.2-second signal analysis results.

[rui_huang]

I am not quite understand your problem.

You mean that you can only aquire a 0.2 seconds waveform?

If you want to aquire 3 seconds waveform you can use the finite number mode. You can determine the finite number by using the sample rate and the sample period (times sample rate with period. e.g . if you are now using 1000 for the sample rate and you want to aquire for 3 seconds you can set the numbers of channels to 3000. So that the task will continous to acqire for just 3 seconds before it stops).