I would surmise the following, and would appreciate if Mr. Cameron could confirm / correct as appropriate:
Victim equipment FI threshold proper control IR motion sensors > 100 mV/m RI car alarms > 100 mV/m RI garage door openers uV/m RE/better rf port design baby monitors uV/m RE/better rf port design telephones (cordless?) uV/m RE/better rf port design computer speakers > 100 mV/m RI The point being that RE are only controlled to protect intentional radio reception, and RI is imposed to protect equipment from intentional radio transmissions. A grey area would be a garage door opener succumbing to a high level signal out of band to its design frequency, which would be addressed by limits placed on out-of-band sensitivity, like the old MIL-STD-461 CS03/04/05/08. Ken Javor ---------- >From: "Ralph Cameron" <[email protected]> >To: "Price, Ed" <[email protected]>, "EMC-PCST \(E-mail\)" <[email protected]> >Subject: Re: Consumer Electronics Compatibility >Date: Tue, Jan 16, 2001, 3:54 PM > > > Ed and all who responded: > > I'm sorry to belabor this issue but I think it is generally one of awareness > and perhaps may not have been raised before in such a manner. I think all of > your observations are correct as Ed surmised < Consumer electronics has not > been well addressed because it has been largely a voluntary requirement. My > opinion is such requirements are not observed in the real world. > > I am attached a PDF file called EMCAB-1 which in this country was > promolgated many years ago and I think that will provide the information you > ae missing. I might say that EMCAB-1 was ignored by manufacturers but the > problems have persisted. > > I can also say that 15 years ago there were 30,000 cases a year in Cnada > alone. This has dropped considerably in the last ten years but now we find > consumer switch mode power supplies casuing the same problem . These are > type, typically free running that do not contain microprocessors so do not > fall under the Digital emissions regulations ( FCC Part 15). > > The harmonics from "electronic" transformers is condcuted back into the > powerline and from there is re radiated by house wiring . It is not a CE > problem relating to cables. > > My experience has been that the majority of this 'nuisance " can be removed > effectively with common mode inductors which could be offered as some > consumer relief. In Canada, this is the consumer's responsibility. > > p.s recent devices exhibiting radiosensitivity are : Infra red motion > sensors, car alarms, garage door openers, baby monitors, telephones , > computer speakers etc. > > Ralph Cameron > ----- Original Message ----- > From: "Price, Ed" <[email protected]> > To: "EMC-PCST (E-mail)" <[email protected]> > Sent: Tuesday, January 16, 2001 10:02 AM > Subject: Consumer Electronics Compatibility > > >> >> Ralph: >> >> Would you provide a little more detail about the <30MHz Consumer > Electronics >> compatibility problems that you have been addressing? Are you finding that >> the path is a direct galvanic connection, or is the problem caused > primarily >> by radiation of energy off of the power lines? What are the most common >> emitting devices, and what types of devices are the most numerous victims? >> And of course, what's usually the best solution? >> >> Thanks, >> >> Ed >> >> >> >> -----Original Message----- >> From: Ralph Cameron [mailto:[email protected]] >> Sent: Monday, January 15, 2001 7:57 PM >> To: Ken Javor; dan kwok >> Cc: EMC-PCST (E-mail) >> Subject: Re: Site Correlation >> >> >> >> No, your message is clear, what I am saying is that the emissions below >> 30Mhz cause the majority of the interference problems to consumer >> electronics and that's not being addressed. >> >> Ralph Cameron >> >> ----- Original Message ----- >> From: "Ken Javor" <[email protected]> >> To: "Ralph Cameron" <[email protected]>; "dan kwok" <[email protected]> >> Cc: "EMC-PCST (E-mail)" <[email protected]> >> Sent: Monday, January 15, 2001 10:34 PM >> Subject: Re: Site Correlation >> >> >> > I must have been unclear in my previous message. The purpose of >> controlling >> > cable cm CE is to control the resultant cable-induced RE, which are >> > controlled to protect tunable antenna-connected radio receivers, period. >> > There was never any other purpose for controlling CE or RE. >> > >> > Ken Javor >> >> Ed Price >> [email protected] >> Electromagnetic Compatibility Lab >> Cubic Defense Systems >> San Diego, CA. USA >> 858-505-2780 (Voice) >> 858-505-1583 (Fax) >> Military & Avionics EMC Services Is Our Specialty >> Shake-Bake-Shock - Metrology - Reliability Analysis >> >> ------------------------------------------- >> This message is from the IEEE EMC Society Product Safety >> Technical Committee emc-pstc discussion list. >> >> To cancel your subscription, send mail to: >> [email protected] >> with the single line: >> unsubscribe emc-pstc >> >> For help, send mail to the list administrators: >> Jim Bacher: [email protected] >> Michael Garretson: [email protected] >> >> For policy questions, send mail to: >> Richard Nute: [email protected] >> >> >> >> > > > ------------------------------------------- > This message is from the IEEE EMC Society Product Safety > Technical Committee emc-pstc discussion list. > > To cancel your subscription, send mail to: > [email protected] > with the single line: > unsubscribe emc-pstc > > For help, send mail to the list administrators: > Jim Bacher: [email protected] > Michael Garretson: [email protected] > > For policy questions, send mail to: > Richard Nute: [email protected] > > ------------------------------------------- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. 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