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I am sampling two sinusoidal analogue signals that are phase separated by $\frac{2\pi}{3}$, and there appears to be a significant amount of common mode noise in my samples. What, if any approach can I take to improve my SNR?

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  • $\begingroup$ Are the analog sources and ADC's properly grounded/isolated/terminated? $\endgroup$ – rickhg12hs Jan 10 '14 at 14:36
  • $\begingroup$ No, I don't think they are. I don't have control over the physical board and ADCs only the software so I am trying my best to fix the real problem in software. $\endgroup$ – man Jan 10 '14 at 15:03

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