Using DAQ-mx, I am trying to output two fast and simultaneous analog ramps. I have created the attached .vi and know that if I try to output just one ramp, my method works. However, when I add the second ramp one channel outputs a ramp and when it is finished the other ramp is output on the second channel. Can you spot my error?

Try increasing the rate constant to something appropriate for your hardware (i.e. within the maximum sample rate for your hardware). You could try 50000. You will also need to change the waveform generator sample speeds too (they are all set at 1000hz). Maybe make a front panel control and replace all the 1000 constants with a wire to the control. I hope this works!Message Edited by macaba on 07-23-2009 09:10 AM

Multifunction DAQ

Generating fast analogue ramps simultaneously

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That's it, thanks. Looks good for now. Thanks for all your help

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Multifunction DAQ

Generating fast analogue ramps simultaneously

Re: Generating fast analogue ramps simultaneously