Re: [PSES] 80/80 rule

[John Woodgate]

Thanks, that's a very important lead.

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

On 2019-11-19 08:09, Ari Honkala wrote:

I found an interesting old document “CISPR Report of the Plenary Session held in The Hague from 18^th to 21^st November 1958”.

It mentions a Study Question 18 (Brussels 1956): “what method should be used when applying limits for radio interference to appliances in large-scale production?”

I could not find anything more on this, but it looks like a kick-off for the statistical evaluation.

And no, I was not there.

Regards,

Ari Honkala

SESKO

*From:* Ghery S. Pettit [mailto:n6...@comcast.net]
*Sent:* maanantai 18. marraskuuta 2019 21.50
*To:* EMC-PSTC@LISTSERV.IEEE.ORG
*Subject:* Re: [PSES] 80/80 rule

I know it is in VDE 0871/6.78, so it dates back to at least June of 1978.  I don’t know about anything prior to that.  VDE 0871/6.78 is also the only place I’ve seen a requirement that if a single unit is tested then a 2 dB margin is required.

Ghery S. Pettit iNCE

Pettit EMC Consulting LLC

*From:* John Woodgate <j...@woodjohn.uk <mailto:j...@woodjohn.uk>>
*Sent:* Monday, November 18, 2019 11:47 AM
*To:* EMC-PSTC@LISTSERV.IEEE.ORG <mailto:EMC-PSTC@LISTSERV.IEEE.ORG>
*Subject:* Re: [PSES] 80/80 rule

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 Associateswww.woodjohn.uk  <http://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>
        <mailto: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  <http://www.woodjohn.uk>

        Rayleigh, Essex UK

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