making a pulse width that is independent of frequency

[MEMSpoweruser]

I'm using the arbitrary waveform generator vi to output two simultaneous signals. I need one to have a 1000 micro second pulse width that remains constant as frequency varies between 200 and 300 Hz. Can this vi do this? If not is there an example vi that can or do I have to program my own?

[Filipe A.]

Hello;

You can do that with the Analog Output channels of your DAQ device. To change the frequency, you just need to change the datapoints to output on the channels. You need to come up with a subVI that calculates the necessary datapoints to be output on the analog output channels, so the width is maintained as you change the waveform frequency.

Hope this helps.
Filipe A.
Applications Engineer
National Instruments