Very good point. Obviously the cables could be very long, at least as long as half the aircraft, if the 12 Vdc supply were situated in the exact center of the aircraft. Since the laptops were qualified running of a 50/60 Hz power mains, the measured CSIPR emissions don't apply to this mode. Would it be too much to expect that the adapters for sale for this purpose do meet stringent RE limits? Or do they fall in a a regulation crack - CISPR wouldn't apply and somehow I don't see these devices being qualified to RTCA/DO-160.
But while all of this is interesting and food for thought, it STILL doesn't affect my basic premise, that PEDs interfere with aircraft operation via aircraft antennas, not aircraft wires. ---------- >From: John Woodgate <j...@jmwa.demon.co.uk> >To: emc-p...@majordomo.ieee.org >Subject: Re: New EU regulations - civil aviation >Date: Mon, Sep 16, 2002, 1:15 AM > > > I read in !emc-pstc that Ken Javor <ken.ja...@emccompliance.com> wrote > (in <0h2i001lcfw...@mtaout04.icomcast.net>) about 'New EU regulations - > civil aviation' on Sun, 15 Sep 2002: >>My response is that conducted path is so lossy as to be negligible. > > But how long are the cables? I think we have more or less agreed that it > is *radiation* from consumer devices interfering with aircraft radio > reception where the potential problem arises. Hence the threat with the > 12 V supplies is *radiation from the cables*, due to conducted emissions > form the consumer device. > -- > Regards, John Woodgate, OOO - Own Opinions Only. http://www.jmwa.demon.co.uk > Interested in professional sound reinforcement and distribution? Then go to > http://www.isce.org.uk > PLEASE do NOT copy news posts to me by E-MAIL! > > ------------------------------------------- > This message is from the IEEE EMC Society Product Safety > Technical Committee emc-pstc discussion list. > > Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ > > To cancel your subscription, send mail to: > majord...@ieee.org > with the single line: > unsubscribe emc-pstc > > For help, send mail to the list administrators: > Ron Pickard: emc-p...@hypercom.com > Dave Heald: davehe...@attbi.com > > For policy questions, send mail to: > Richard Nute: ri...@ieee.org > Jim Bacher: j.bac...@ieee.org > > All emc-pstc postings are archived and searchable on the web at: > http://ieeepstc.mindcruiser.com/ > Click on "browse" and then "emc-pstc mailing list" > ------------------------------------------- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Ron Pickard: emc-p...@hypercom.com Dave Heald: davehe...@attbi.com For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org All emc-pstc postings are archived and searchable on the web at: http://ieeepstc.mindcruiser.com/ Click on "browse" and then "emc-pstc mailing list"
