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No pulses generated!

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Hey!

I am having trouble with generating a PWM signal using a counter channel on our NI-6733 card.

I use the DAQmx VIs to: Create a task (frequency = 50 Hz, duty cycle = 0.07) - set the task to finite samples with a certain number of samples - start the task - wait until they've been written - stop the task (is that actually necessary?) and delete the task.

 

I check the output with an oscilloscope. If I run the VI, only some times the pulse train is generated and sometimes nothing happens.

 

The same happens when I use MAX and create a pulse train with the "test panels" dialog.

 

It seems to me like there's a hardware problem, how can I investigate what's the problem?

 

Does anybody know this issue? Am I doing something wring? Thanks for any help!

Best,

Steve


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