I agree: I'm almost certain that it is German in origin, and I'm sure it dates back to the 20th Century, possibly as early as 1960.

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

On 2019-11-18 19:44, John Shinn wrote:
If my memory serves me right, as I recall, the 80/80 rule was in at least one of the VDE standards regarding radiated emissions. I can’t recall the number or name. This is going back to the late ‘70s or so.

John Shinn
Retired

Sent from my iPhone

On Nov 18, 2019, at 9:55 AM, John Woodgate <j...@woodjohn.uk> wrote:



Can someone tell me when the 80/80 rule was introduced into CISPR standards and if possible, a bit more detail than just the date, please?

--
Best wishes
John Woodgate OOO-Own Opinions Only
J M Woodgate and Associateswww.woodjohn.uk
Rayleigh, Essex UK
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