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Clocking hardware DO on PXI-6259

trying to output continous DigitalOutput using Counter Out as clock source. I can output multiple 32 bit words(an array of 30) at a rate of 500khz, but the digital output behaves like a finite output at any higher rate.

 

Outputs are burst once, then a static value ?

 

I think it has to do with buffer sizing, but can't find  a definitive answer.

 

Anybody enountyer this problem ?

 

Thanks

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Perhaps a screenshot of your code can help visualize what the issue is...

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