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Problem with retriggering.

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Hello!

 

I have periodic TTL impulse with constantfrequency – signal to start , which I'm used to start data acquisition (PCI-6251)and generation signal (PCI-6221).

When TTL signal a detection, necessary generationsome analog signal (PCI-6221) and acquisition other analog signal (PCI-6251).  Then wait following TTL signal.

At this moment I write the part of the programwhich is responsible for data acquisition. Function retriggering (In examples C:\ProgramFiles\National Instruments\LabVIEW8.5\examples\DAQmx\Synchronization\Multi-Function.llb\Multi-Function-CtrRetrigg Pulse Train Generation for AI Sample Clock.vi) is used. This function necessary,because we start data acquisition each time on arrival TTL impulse, andrepeated creation of the virtual channel of data acquisition with the newtrigger spend a lot of time.

The problem consists in the following. Generationof the data from other card should occur on the same impulse TTL as for thedata acquisition card. Whether it is possible to connect program somehowcreated for the data acquisition channel retriggering on the channel generation?Or unique solution is creation of a similar code of the program, only alreadyfor other card and connect TTL signal on wires on this card?

Thanks.

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Solution
Accepted by topic author _Pavel_
Have you looked into the RTSI? You should be able to share a digital line using that bus. Search through the website for RTSI and post back if you still have questions.
Adnan Zafar
Certified LabVIEW Architect
Coleman Technologies
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