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Manual trigger using external button

Hi,

 

Probably a real newbie question:

I am trying to use an external momentary button to record pulses. The button is connected to the 5v+ output and aio of the bnc 2110. When I connect the button to the oscilloscope I see clear 5V step each time I press the button however when I connect the button to the ai0 and record in matlab using the analogInputRecorder the signal doesn´t make sense. What am I doing wrong?09230803_p.png

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I would say it is time to go back to the basics to see where the problem is.  I would start by going into MAX and see if you get the signal using the test panel for the device.  If it does not work correctly in MAX I doubt you will get it to work in matlab.

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