Help with NI 9401 and pulse width generation

[khoaGNF]

I have (2) NI 9401 and cDAQ-9172.  I try to setup the NI 9401 to output a single pulse with pulse width of 20ms.  When triggering, NI 9401 would output a square wave ON for 20ms "solid", then turn the square wave OFF after that.

I would like to do this repeatedly every 20ms, 50ms, up to 1second in a loop.  I want to be able to set the loop repeat time and the pulse width of the signal.

I don't know how to right a loop that can do this experiment.

Could you please help?

Thanks a lot!

khoaGNF

[Hillman]

Hi khoaGNF,

Thanks for the post,

So I have an example Generate Digital Pulse Train-Finite-Retriggerable, where you can select the number of pulses produced on a trigger (i.e. 1 for your case). 

My example uses a hardware trigger, so you could make another digital task that produces a rising edge at 20ms/50ms.. whatever you require.

Let me know what you think,

Kind Regards,

ps please remember one post!

pss example in labview 8.6 

[khoaGNF]

Hi Hillman,

Thank you very much for your support.  Sorry that I posted the same question in two different places.  I have the NI 9401 generate pulses, but now I have a question on how to do it in a loop.  I asked my question in the following thread (see the link).

http://forums.ni.com/ni/board/message?board.id=250&message.id=43990

Thanks

-khoaGNF