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NI 6229 - The analog input pin reads 1.23V trigger signal when the actual trigger signal is around 3V.

NI 6229 - The analog input pin reads 1.23V trigger signal when the actual trigger signal is around 3V.

‎05-18-2020 05:39 PM

I am sending a trigger signal of around 3V, and when I read the signal through NI 6229 analog input pin, it read around 1.23V. Could it be that the trigger signal has low current? or is it due to the pull down resistor? What can I do to see the trigger signal of 3V? 

 

When I use a power supply of 3V, the NI 6229 analog input reads the voltage correctly but why does it not read the trigger signal correctly? 

 

Thank you  

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