dang you beat me too it. I thought this would evolve over several notes, but no... you had to go all the way at once. I was going to go from single point, expanded to a single edge, expended to a plane, which can again be expanded to a chassis, and with care on cable shield terminations, to single ground set of chassis, and then stepped up the CBN, common bonding network of a single ground room. Now to go see everyone else says!
>________________________________ > From: "ce-test, qualified testing bv - Gert Gremmen" <g.grem...@cetest.nl> >To: Bill Owsley <wdows...@yahoo.com>; d...@dsmith.org; Si-List ><si-l...@freelists.org>; emc-pstc <emc-p...@ieee.org> >Sent: Tuesday, May 21, 2013 2:40 AM >Subject: RE: Single Point Grounding - Not Achievable at High Frequencies >(greater than a few MHz) > > > >Yes, it is….! > >In RF technology it is very common to use a plane as a single grounding point. >It is a very satisfying replacement for the single-grounding-point solution. > >The ground layer in any multi-layer PCB is such a single-plane-ground, with >similar electrical properties to the “old school” single ground concept at >both RF and AF frequencies. > >I would re-formulate the statement in that it is impossible to connect 2 ground >points , planes or structures using a single wire/connection. > > >Both Doug and Bill are also right of course from their point of concept/view. > > >Regards, > >Ing. Gert Gremmen, BSc > > > >g.grem...@cetest.nl >www.cetest.nl > >Kiotoweg 363 >3047 BG Rotterdam >T 31(0)104152426 >F 31(0)104154953 > >Before printing, think about the environment. > > >Van:emc-p...@ieee.org [mailto:emc-p...@ieee.org] Namens Bill Owsley >Verzonden: Tuesday, May 21, 2013 5:02 AM >Aan: d...@dsmith.org; Si-List; emc-pstc >Onderwerp: Re: Single Point Grounding - Not Achievable at High Frequencies >(greater than a few MHz) > >Dr. Tom Van Doren demonstrates that single point grounding is not possible >above the audio frequencies. >Thus the lower cutoff in the "regulations" of 9 kHz. And that is really old >school... > > >> >>________________________________ >> >>From:Doug Smith <d...@emcesd.com> >>To: Si-List <si-l...@freelists.org>; emc-pstc <emc-p...@ieee.org> >>Sent: Tuesday, April 10, 2012 8:05 PM >>Subject: Single Point Grounding - Not Achievable at High Frequencies (greater >>than a few MHz) >> >>Hi All, >> >>I have just uploaded the first Technical Tidbit article from my new office in >>Boulder City, NV! Here it is: >>Technical Tidbit - April 2012 >>Single Point Grounding - Not Achievable at High Frequencies (greater than a >>few MHz) >> >>The link to the article is: http://emcesd.com/tt2012/tt041012.htm >> >>My new office in Boulder City, NV is officially open!!! Still more work to do >>on the house move so the next few weeks will be very busy and the May >>Technical Tidbit may be a little late as well. Once the move is complete, I >>expect to do morning 5 to 10 minute podcasts on technical topics every >>morning I am in the office. These podcasts will appear on the home page of >>http://CircuitAdvisor.com by late morning each day except for days when I am >>not in the office. >> >>Doug >>-- >>------------------------------------------------------- >> ___ _ Doug Smith >> \ / ) P.O. Box 60941 >> ========= Boulder City, NV 89006-0941 >> _ / \ / \ _ TEL/FAX: 702-570-6108/570-6013 >>/ /\ \ ] / /\ \ Mobile: 408-858-4528 >>| q-----( ) | o | Email: d...@dsmith.org >>\ _ / ] \ _ / Website: http://www.dsmith.org >>------------------------------------------------------- >>- >>---------------------------------------------------------------- >>This message is from the IEEE Product Safety Engineering Society emc-pstc >>discussion list. To post a message to the list, send your e-mail to >><emc-p...@ieee.org> >>All emc-pstc postings are archived and searchable on the web at: >>http://www.ieee-pses.org/emc-pstc.html >>Attachments are not permitted but the IEEE PSES Online Communities site at >>http://product-compliance.oc.ieee.org/ can be used for graphics (in well-used >>formats), large files, etc. >>Website: http://www.ieee-pses.org/ >>Instructions: http://listserv.ieee.org/request/user-guide.html >>List rules: http://www.ieee-pses.org/listrules.html >>For help, send mail to the list administrators: >>Scott Douglas <emcp...@radiusnorth.net> >>Mike Cantwell <mcantw...@ieee.org> >>For policy questions, send mail to: >>Jim Bacher <j.bac...@ieee.org> >>David Heald <dhe...@gmail.com> >> >- >---------------------------------------------------------------- >This message is from the IEEE Product Safety Engineering Society emc-pstc >discussion list. To post a message to the list, send your e-mail to ><emc-p...@ieee.org> >All emc-pstc postings are archived and searchable on the web at: >http://www.ieee-pses.org/emc-pstc.html >Attachments are not permitted but the IEEE PSES Online Communities site at >http://product-compliance.oc.ieee.org/ can be used for graphics (in well-used >formats), large files, etc. >Website: http://www.ieee-pses.org/ >Instructions: http://listserv.ieee.org/request/user-guide.html >List rules: http://www.ieee-pses.org/listrules.html >For help, send mail to the list administrators: >Scott Douglas <emcp...@radiusnorth.net> >Mike Cantwell <mcantw...@ieee.org> >For policy questions, send mail to: >Jim Bacher <j.bac...@ieee.org> >David Heald <dhe...@gmail.com> > > - ---------------------------------------------------------------- This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. To post a message to the list, send your e-mail to <emc-p...@ieee.org> All emc-pstc postings are archived and searchable on the web at: http://www.ieee-pses.org/emc-pstc.html Attachments are not permitted but the IEEE PSES Online Communities site at http://product-compliance.oc.ieee.org/ can be used for graphics (in well-used formats), large files, etc. Website: http://www.ieee-pses.org/ Instructions: http://listserv.ieee.org/request/user-guide.html List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas <emcp...@radiusnorth.net> Mike Cantwell <mcantw...@ieee.org> For policy questions, send mail to: Jim Bacher: <j.bac...@ieee.org> David Heald: <dhe...@gmail.com>
