Hello,
Most of the time when doing PWM, the best way to proceed with a DAQ device would be with a counter output. Typically if that's not available, you'll want to use a DIO line with hardware timing. If neither of these options are available you could choose software timing but please note that this is far less deterministic and completely dependent on your O/S and computer setup (in this case, your PDA). All things considered, you can do this, but as mentioned above, this won't be the best performance out there. As this is a fairly less common case, I don't have an example handy to show you. In the mean time, I can describe the technique for you. You'll want to create a Digital Output channel and build an array of 0's and 1's and write it to a digital line. The ratio of zeros to ones will be your duty cycle. The rate your loop runs will be how fast your line outputs. I hope this information is helpful. If you need more information about this procedure, let me know. I saw on one of your previous posts that you were given some useful links on DAQ basics and this will help greatly.
PBear
NI RF
