ngscopeclient screenshot showing ripple waveforms

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   Andrew Zonenberg (azonenberg@ioc.exchange)'s status on Wednesday, 27-Mar-2024 03:36:18 JST Andrew Zonenberg

   And finally, power domain 16. The one I was saving for last because it was both the last numerically, and because I knew it would be horrible from previous testing.

   3V0_N is good on average at -2.984V.

   But the ripple is absolutely atrocious, ranging from -2.75 to -3.35V (596 mV p-p, 7.7 mV RMS).

   Also of note is that the 3V0_N rail has negative going spikes exactly when the 3V3 rail has positive spikes and vice versa. Perfectly phase aligned.

   So it definitely looks like the 3V0_N supply is the source of all the junk on the 3V3 rail. Fix that and it should clean up both rails at once.