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<blockquote data-quote="joetama" data-source="post: 1499269" data-attributes="member: 564641"><p>Right, getting it as close to zero is the important thing...&nbsp; However if you have resonations in your cable they will read out close to zero but might actually not be.&nbsp; Where do you think ground loop noise comes from?&nbsp; When you have a potential rise from one point and it oscillates out even in DC unless it’s in this “Perfect” world that doesn’t exist...&nbsp; They might be tiny small and insignificant in most cases, but in a few cases they can make a huge difference, and the more current you draw the bigger those oscillations will become voltage oscillations consequently raising the ground farther and farther from true zero.&nbsp; When this happens you are voiding the whole point of sure grounding.&nbsp; I’m not saying that this is true in every case, but in a few cases it is, that’s why common source grounding is important.&nbsp; Disagree with me if you want, but I’ve seen and heard the difference especially in high frequency electronics.</p></blockquote><p></p>

[QUOTE="joetama, post: 1499269, member: 564641"] Right, getting it as close to zero is the important thing... However if you have resonations in your cable they will read out close to zero but might actually not be. Where do you think ground loop noise comes from? When you have a potential rise from one point and it oscillates out even in DC unless it’s in this “Perfect” world that doesn’t exist... They might be tiny small and insignificant in most cases, but in a few cases they can make a huge difference, and the more current you draw the bigger those oscillations will become voltage oscillations consequently raising the ground farther and farther from true zero. When this happens you are voiding the whole point of sure grounding. I’m not saying that this is true in every case, but in a few cases it is, that’s why common source grounding is important. Disagree with me if you want, but I’ve seen and heard the difference especially in high frequency electronics. [/QUOTE]

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