For background info I am an EE/CE that is 10 years out of school and has since worked writing firmware and dealt mostly with digital communications and signals, so now I am having to reach back to my (very) atrophied analog knowledge.
I am working with a 4 channel ADC, and I am trying to get a rough estimate of the input skew between channels when a 'simultaneous' capture is performed.
So I got the device with all 4 channels hooked up to a single sine wave from my function generator, performed the capture, and am now trying to analyze the data.
I know the max amplitude of the sine wave, as well as the frequency. I remember calculating instantaneous voltage for known phase angles, but I can't seem to figure out how the get phase angle from voltage (I am aware that there will be two possible angles for a given voltage).
my overall game plan is to determine the angle of each reading, then using the known frequency get skew time by \$sk = (Ch2\angle - Ch1\angle) * (360 \div hz) \$
so I guess the short question is, how a can I get phase angle for a point on a known sine wave, or the long question is; is there a better way to go about what I am doing?