The European Commission's lawyers object to mentioning statistical methods in standards, so the '80/80' rule texts are eliminated from the EN 550xx versions and are replaced by EN 50175, which is advice to manufacturers about determining what margin is necessary.

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Best wishes John Woodgate OOO-Own Opinions Only
www.woodjohn.uk
Rayleigh, Essex UK

I hear, and I forget. I see, and I remember. I do, and I understand. Xunzi (340 - 245 BC)


On 2023-07-10 15:54, Chas Grasso wrote:
What I DO remember is CISPR (Now EN) 22 (55022) that
required multi-sample testing if the original sample was within 3dB of the spec so as to establish a statistical metric of the EMI performance of the EUT.

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