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 margin. So the 6 dB rules would give you 3 dB margin.
That's my humanly guess. God had different rules that we can't Divine:) Best Regards, Alfred On September 1, 2017 6:01:20 AM PDT, Kim Boll Jensen <k...@bolls.dk> wrote: >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 and for many years ago VDE did >have >some rules like that. > > > >Does anyone have some good references on this subject? > > > >Best regards, > > > >Mr. Kim Boll Jensen > > >- >---------------------------------------------------------------- >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://www.ieee-pses.org/list.html (including how to >unsubscribe) >List rules: http://www.ieee-pses.org/listrules.html > >For help, send mail to the list administrators: >Scott Douglas <sdoug...@ieee.org> >Mike Cantwell <mcantw...@ieee.org> > >For policy questions, send mail to: >Jim Bacher: <j.bac...@ieee.org> >David Heald: <dhe...@gmail.com> -- Sent from my Android phone with K-9 Mail. Please excuse my brevity. - ---------------------------------------------------------------- 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://www.ieee-pses.org/list.html (including how to unsubscribe) List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas <sdoug...@ieee.org> Mike Cantwell <mcantw...@ieee.org> For policy questions, send mail to: Jim Bacher: <j.bac...@ieee.org> David Heald: <dhe...@gmail.com>
