data vs time acquisition (Labwindows and DAQPad 6015)

[carlorfeo]

Hi to everyone!

In my application I want to acquire analog voltage vs time with the DAQPad 6015. In the first version of my CVI programme I made a software based acquisition, but in this way the demand delay limits the sample frequency. I wish I used the on board counter to generate a pulse train to be connected at the external clock of the ADC. Do you know If is it possbile ? Can I use two DAQTask at the same time? 

Any suggestion and advice is welcomed, because I'm a beginner.

Thanks

[RobertoBozzolo]

You device is capable of timed aquisition so you can design a task that automatically performs acquisition at the samples/sec you want (limited to 200 kS/sec max divided by the number of channels to acquire).

You can take a look at this example that performs continuous acquisition; the example should get installed on your machine too when you installed DAQmx, as well as another (Acq-IntClk.cws) that is similar with the difference that the amount of samples to acquire is decided before starting the task.

These are basic examples to be used as starting points to develop your own acquisition and processing project. I suggest you search for documentation on DAQmx and acquisition / generation tasks in the help on your machine as well as on this site. I can suggest you take a look at this useful white paper, as well as others you can find with the search function.