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Tektronix MDO34 Question

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jayalt:
Trying to understand this difference I am seeing on my oscilloscope.

I am debugging a marginal issue. I see a brighter-colored section at the beginning of power-on of my voltage rail via my oscilloscope. This is significant to me because it ONLY exists when the device goes on to later fail. I have attached the "passed" instance in comparison, where the voltage rail is duller in color.

I'm trying to understand what the difference is that is resulting in this different/brighter color? This could potentially lead me to narrow down the root cause of my issue.

When I try to zoom in, the waveforms begin to look exactly the same. But there is a clear difference when zoomed out.

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