What I have always set as a target is 6 dB better than spec on prototype /
first units tested, then 3 dB better on production audits.
That may no longer be good enough. The reason is a lot of products now have
radio receivers in them as in Bluetooth, wifi, NFC, and RFID. If your
unintentionally
d data, and may distort it (them?).
From: Cortland Richmond [mailto:k...@earthlink.net]
Sent: Saturday, September 2, 2017 10:53 AM
To: EMC-PSTC@LISTSERV.IEEE.ORG
Subject: Re: [PSES] God EMC practice
In ancient times, the FCC required we perform RE testsby manipulating
peripheral and cable pla
In ancient times, the FCC required we perform RE testsby manipulating
peripheral and cable placement to maximize emissions; our tech at Tandy
was fiendishly clever, but we had to draw the line short of wrapping
cables around the (CRT) monitor.
Lots of stories...
Cortland Richmond
On
nt: Friday, September 01, 2017 12:05 PM
To: EMC-PSTC@LISTSERV.IEEE.ORG
Subject: Re: [PSES] God EMC practice
A good practice is to use your calculated measurement uncertainty for
emissions as your minimum margin requirement.
That will often put you in the 3-4 dB rang
ciates
Beware averages! They hide or discard data, and may distort it (them?).
From: Schaefer, David [mailto:dschae...@tuvam.com]
Sent: Friday, September 1, 2017 4:36 PM
To: EMC-PSTC@LISTSERV.IEEE.ORG
Subject: Re: [PSES] God EMC practice
The vehicle area is different as well. Standards like
0251
Cell: 612 578 6038
Fax: 651 638 0285
From: Patrick [mailto:conwa...@gmail.com]
Sent: Friday, September 01, 2017 10:21 AM
To: EMC-PSTC@LISTSERV.IEEE.ORG
Subject: Re: [PSES] God EMC practice
God and Compliance Margin... two topics that generate a lot of preaching!
I think everyone has
odgate and
Associates
Beware averages! They hide or discard data, and may distort it (them?).
From: Ted Eckert [mailto:07cf6ebeab9d-dmarc-requ...@ieee.org]
Sent: Friday, September 1, 2017 4:10 PM
To: EMC-PSTC@LISTSERV.IEEE.ORG
Subject: Re: [PSES] God EMC practice
First, you can find a l
SERV.IEEE.ORG
Subject: Re: [PSES] God EMC practice
First, you can find a lengthy discussion from 10 years ago in the archive of
this list server.
<https://www.mail-archive.com/emc-pstc@listserv.ieee.org/msg42809.html>
https://www.mail-archive.com/emc-pstc@listserv.ieee.org/msg42809.h
That will often put you in the 3-4 dB range.
>
>
>
> Jim
>
>
>
>
>
> James L. Knighten, Ph.D.
>
> Teradata
>
> 17095 Via Del Campo
>
> San Diego, CA 92127
>
> 858-485-2537 <(858)%20485-2537>
>
>
>
> *From:*
reflect those of my
employer.
From: Kim Boll Jensen [mailto:k...@bolls.dk]
Sent: Friday, September 1, 2017 6:01 AM
To: EMC-PSTC@LISTSERV.IEEE.ORG
Subject: [PSES] God EMC practice
Hi
One of our customers want to know if there are some good practice for emission
compliance. I normally recommend 3
]
Sent: Friday, September 01, 2017 6:01 AM
To: EMC-PSTC@LISTSERV.IEEE.ORG
Subject: [PSES] God EMC practice
Hi
One of our customers want to know if there are some good practice for
emission compliance. I normally recommend 3 dB margin, but I don't have any
reference to why this is OK.
My first post-military (21 years) employer, did statistical quality
testing in 1983-87, but that was because they were producing TEMPEST
qualified systems too; it was habit. My second employer a (defunct firm
in Forth Worth) tested before sending systems out for FCC approval, and
also the
[mailto:k...@bolls.dk]
Sent: Friday, September 01, 2017 6:01 AM
To: EMC-PSTC@LISTSERV.IEEE.ORG
Subject: [PSES] God EMC practice
Hi
One of our customers want to know if there are some good practice for emission
compliance. I normally recommend 3 dB margin, but I don't have any reference to
why
Beware averages! They hide or discard data, and may distort it (them?).
From: msherma...@comcast.net [mailto:msherma...@comcast.net]
Sent: Friday, September 1, 2017 4:55 PM
To: John Woodgate <jmw1...@btinternet.com>
Subject: Re: [PSES] God EMC practice
John --
Maybe I deleted a previous e
From: John Woodgate [mailto:jmw1...@btinternet.com]
Sent: Friday, September 1, 2017 2:12 PM
To: 'Kim Boll Jensen' <k...@bolls.dk>
Subject: RE: [PSES] God EMC practice
Go to: http://www.jmwa.demon.co.uk/Illustrations%20of%2080-80%20rule.pdf
This is a presentation delivered by an expert on
odgate and
Associates
Beware averages! They hide or discard data, and may distort it (them?).
From: Patrick [mailto:conwa...@gmail.com]
Sent: Friday, September 1, 2017 4:21 PM
To: EMC-PSTC@LISTSERV.IEEE.ORG
Subject: Re: [PSES] God EMC practice
God and Compliance Margin... two topics that generate
God and Compliance Margin... two topics that generate a lot of preaching!
I think everyone has a "tradition" of what worked for them, and what
did not.
Here is my sermon on margin:
I don't consider myself a monk of the EMI Chamber...
...but over the years I have preached various
Hi Kim,
I've just had a chat with a compliance test lab engineer on this very topic
yesterday. He said their measurements have a 3 dB uncertainty between labs. So
it world seem when everything is as accurate as possible, 3dB margin would
ensure you will always pass, possibly without any
I'm sure some agencies and companies have rules for this aspect, but I'm not
sure about "God"! J
From: Kim Boll Jensen [mailto:k...@bolls.dk]
Sent: 01 September 2017 14:01
To: EMC-PSTC@LISTSERV.IEEE.ORG
Subject: [PSES] God EMC practice
Hi
One of our customers wa
Hi
One of our customers want to know if there are some good practice for
emission compliance. I normally recommend 3 dB margin, but I don't have any
reference to why this is OK.
I know that some companies have internal rules for 3 or even 6 dB margin to
compensate for production deviations
20 matches
Mail list logo
