Quote: The important thing is that the sine wave goes above whatever voltage threshold to signal a 'high', and then that it goes below another lower voltage to signal a 'low'. It also has to stay above the 'high' voltage long enough for the electronics to detect it. (Same with the 'low' voltage).
exactly, i do believe they can select on which side of the slope it triggers as well. there may be more "noise" considerations with sine but you could get noise on a square system as well.
