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how to trigger a counter (for impulse generation) with a analog peak

Hi everyone,

 

I am getting mad with a simple task (for you),

 

I use a Ni USB-6251 with screw terminals.

I am trying to send to any adapted output a 0-5V impulse using an analog signal (external sampling with an angle encoder varying in the 6-18kHz range), which generates a peak at a frequency comprised between 5 and 25Hz.

The word file in attachment shows that it works quite well if generating a single numeric pulse.

 

Here is my problem: how can I convert this numeric pulse in a counter impulse which allows for setting a 'time' for low/high state and triggering the start of the impulse.

 

Can you help me?

 

Thanks

 

 

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