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wrong duty cycle (pci 6014 and bnc2110)

Hello,
I want to generate a square signal with labview 7.0, pci 6014 and bnc 2110. I attached my VI . The duty cycle works properly for instance for 10%, 20%, 30% (I suppose that it works because when I anlyse the signal: some pulse seams to not appear ) . BUT when I change the duty cycle constant to 15%: the output is again 20% and not 15%. It's the same case for 17%, 18%....
I really need to create square signal with a perfect duty cycle.
Do you know where is the problem?
Thank you 
labview 7.0
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Message 1 of 5
(2,897 Views)

Do I need to use Digital and timing I/O to have the most precise signal?

(I want to generate a 100hz signal)

labview 7.0
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Message 2 of 5
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In the first message there is not smiley.. I wanted to say that some pulse (high level) are missing.
labview 7.0
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Message 3 of 5
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I found the problem for missing pulse: it's the while loop. I delete it and add more samples.

The duty cycle works now due to the precision of the "simulate signal"

labview 7.0
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Message 4 of 5
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Message Edité par ramiral le 08-25-2005 08:21 AM

labview 7.0
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Message 5 of 5
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