If a zygote weighs around a milligram, 80dB is just about right. Orin Laney On Sun, 1 Nov 2009 07:35:52 -0600 Robert Heller <rehel...@mmm.com> writes: > Hey........I'm one of those "alcohol consuming old men of EMC". In > fact, I > believe that I am a charter member of this group. I have also had > close to > an 80 dB increase in mass over the years. And yes, I have been an > embarrassment to this (and many other professions) on occasion. : > ) > > Bob Heller > 3M EMC Laboratory, 76-1-01 > St. Paul, MN 55107-1208 > Tel: 651- 778-6336 > Fax: 651-778-6252 > =================================================== > > > > > From: Ken Javor <ken.ja...@emccompliance.com> > > > > To: <EMC-PSTC@LISTSERV.IEEE.ORG> > > > > Date: 10/30/2009 01:23 PM > > > > Subject: Re: Where does 3V/m & 10V/m in RI come from? > > > > Sent by: <emc-p...@ieee.org> > > > > > > > > > The only thing right about that post is the disclaimer, and that is > only if > you have an odd sense of humor. RE limits are set to protect > broadcast > dio reception, while RI/RS limits are set to bracket intentional > transmitters. The margin between receivers and transmitters is > between > femto- and picowatt sensitivity and Watt or higher level > transmission. If > you make the apples to rocks comparison of RE to RI/RS limits the > �margins� > you come up with are on the order of 80 dB or higher. Is there > another > engineering discipline that enforces that sort of margin? Can you > envision > a bridge or building built with such margins? Would an airplane > ever get > built, much less leave the ground? And that Ares rocket that just > launched > successfully yesterday? What would lift-off look like with an 80 dB > increase in mass, huh? > > Granted the previous post was in jest, but too many people take that > sort > of thing at face value. This is embarrassing to the profession. > > Ken Javor > > Phone: (256) 650-5261 > > > From: "Ilarina, Alvin" <alvin.ilar...@plantronics.com> > Date: Fri, 30 Oct 2009 10:30:53 -0700 > To: "Kunde, Brian" <brian_ku...@lecotc.com>, > <EMC-PSTC@LISTSERV.IEEE.ORG> > Conversation: Where does 3V/m & 10V/m in RI come from? > Subject: RE: Where does 3V/m & 10V/m in RI come from? > > IIRC the radiated immunity limits are set at X dB of something above > the > emissions limits creating a guard band. The theory being that there > is a > built in tolerance between the allowable emissions in the field and > the > level at which equipment is supposed to begin to be susceptible. > > I think I heard this explanation off-line from one of the �old men > of EMC� > at one of our conferences/symposiums years ago. We were most likely > consuming alcohol at the time. This might just be urban legend. > > Alvin > > Disclaimer: The contents reflect the opinion of the author and are > meant > for entertainment purposes only. > > > > > > > > > > From: emc-p...@ieee.org [mailto:emc-p...@ieee.org] On Behalf Of > Kunde, > Brian > Sent: Thursday, October 29, 2009 10:18 AM > To: EMC-PSTC@LISTSERV.IEEE.ORG > Subject: Where does 3V/m & 10V/m in RI come from? > > > Simple question, where does the 1V/m, 3V/m and 10V/m test levels > come from > in the Radiated Immunity standards such as IEC/EN61000-4-3? Is > there some > real-world rf source that correlates to these levels? > > Thanks for the history lesson. > > The Other Brian > _________________________ > > LECO Corporation Notice: This communication may contain confidential > information intended for the named recipient(s) only. If you > received this > by mistake, please destroy it and notify us of the error. Thank you. > - > ---------------------------------------------------------------- > 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.ieeecommunities.org/emc-pstc > Graphics (in well-used formats), large files, etc. can be posted to > that > URL. > 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...@socal.rr.com> > 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.ieeecommunities.org/emc-pstc > Graphics (in well-used formats), large files, etc. can be posted to > that > URL. > > 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...@socal.rr.com> > 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.ieeecommunities.org/emc-pstc > Graphics (in well-used formats), large files, etc. can be posted to > that > URL. > > > 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...@socal.rr.com> > 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.ieeecommunities.org/emc-pstc > Graphics (in well-used formats), large files, etc. can be posted to > that URL. > > 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...@socal.rr.com> > 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.ieeecommunities.org/emc-pstc Graphics (in well-used formats), large files, etc. can be posted to that URL. 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...@socal.rr.com> Mike Cantwell <mcantw...@ieee.org> For policy questions, send mail to: Jim Bacher: <j.bac...@ieee.org> David Heald: <dhe...@gmail.com>
