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Generation of controlled pulse duration using NI-USB 6008 DAQ

hi

in continuation of my previous thread  "can i use NI-USB 6008 DAQ for generating pulse" i need some help about generating a controlled pulse duration on one of the digital output lines of DAQ, in my idea i want to use function generator vi to produce a square wave with in while loop and then the high and low pulse duration can be controlled interms of setting up high and low pulse time in second just like a timer switch. 

the user can set up the time so that  pulse could be generated with varing dutycycle.  

my question is how do i set the time for both On and Off conditions in other words?

may be the attached  image help u understanding my question

thanks


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You will find an example of PWM for 6008 here: http://forums.ni.com/ni/board/message?board.id=70&message.id=5527&requireLogin=False
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