Digital waveform acquisition using DAQ digital lines-urgent

[tintin_99]

Hi, I would like to use DAQ Digital input acquisition to acquire the attached waveform. The wavform is actually analog but olways varies between 0 and 3.3 V (  I use 6363 OEM) . I also have another waveform that varies between 4.4 to 5.8

the problrm I have is for the first waveform I always read 0 and for the second waveform I always read 1., Is there any way to change the decision level when I select  digital input acquisition. Lets say when the voltage is below 4.6 consider it as 0 and when it is above 4.6 take

Or I need to use analog acquisition

Thanks

[TroyK]

According to the X series multifunction DAQ documentation for the 6363 the maximum level for a Low=0.8V and the minimum level for a high=2.2V.

So your first signal (0 to 3.3V) should work ok assuming the digital ground reference is connected properly.

The second digital waveform (4.4 to 5.8V) will either need some extenal conditioning or be read as analog and converted to digital.