Depending on the type of Cell phone I don't think you'd need to jam it. For analog, just acquire the frequency in use and transmit the tone/signal for 'END' to hang it up. The cell site will disconnect the call. (Please Note: This is my theory - not a reported experiment.) For digital you'd have to figure out what (CDMA/TDMA/GSM) channel is in use, a little harder, and with digital, the encryption scheme might also get in the way. I don't really know. But, at least its fun to think about while your following the car slowly down the road....
-George S. -----Original Message----- From: Ken Javor [mailto:ken.ja...@emccompliance.com] Sent: Thursday, January 10, 2002 1:32 PM To: Chris Maxwell; Cortland Richmond Cc: scott....@jci.com; michael.sundst...@nokia.com; emc-p...@majordomo.ieee.org Subject: Re: Car EMC, was bulk current injection testing A lot of humor is based on a deliberate misinterpretation of a common phrase or common wisdom. "Take my wife, PLEASE," Or the cute stress relief advice I got the other day. "To relieve a headache, fetch a bottle of aspirin and follow the directions: Take two aspirin and keep away from children." In this case the apparent contradiction is not one at all. The automobile requirements enforced on emissions protect radio receivers in other automobiles and fixed radio receivers operating near roads, the immunity requirements protect your car from malfunctioning when Mr. Richmond's rolling radio station is in the vicinity. Emission limits protect broadcast radio reception, while immunity limits protect non-antenna equipment from high powered transmissions. Not wishing to start another long thread, but I know I am not alone in fantasizing about building a cell-phone jammer and operating it with glee when I follow some slow driver weaving down the road ahead of me with a phone cemented to his/her ear. on 1/10/02 4:03 PM, Chris Maxwell at chris.maxw...@nettest.com wrote: > That's interesting!! (See Cortland's message below) > > We as manufacturers have CENELEC and the FCC breathing down our neck > over a few dBuV/m. > > We have the IEEE EMC and Functional Safety paper, all 50 some pages of > it, worried about the possibly catastrophic effects of a Palm Pilot next > to a crock pot. > > Meanwhile...Cortland ("KA5S" which stands for "Kills your Auto for 5 > Seconds") here is running around town with 100Watts of electronic > ignition stopping transmitter wired to his car. > > I mean, I like the job security of being a compliance guy and all... but > why do we bother? > > (Just meant as humor; I hope no offense is taken. However, if you > think about it, all humor (including this email) needs to have a grain > of truth to be funny. > > Chris Maxwell | Design Engineer - Optical Division > email chris.maxw...@nettest.com | dir +1 315 266 5128 | fax +1 315 797 > 8024 > > NetTest | 6 Rhoads Drive, Utica, NY 13502 | USA > web www.nettest.com | tel +1 315 797 4449 | > > > > > > >> -----Original Message----- >> From: Cortland Richmond [SMTP:cortland.richm...@alcatel.com] >> Sent: Thursday, January 10, 2002 1:30 PM >> To: Ken Javor >> Cc: scott....@jci.com; michael.sundst...@nokia.com; >> emc-p...@majordomo.ieee.org >> Subject: Re: ISO 11452-4 Bulk Current Injection Test >> Requirements >> >> >> A worst case -- "real world" -- is probably just behind a radio >> equipped car, mounting a capacitively top-loaded >> antenna at its rear edge, and about 600 watts of RF. >> >> With rather less power, 100 watts, I've occasionally seen adjacent >> cars' engines stop when I transmit. It would be >> interesting to see if RF at these levels got into electric cars' motor >> controllers. >> >> Cortland - KA5S >> >> (What I write here is mine alone. >> My employer does not >> Concur, agree or else endorse >> These words, their mood, or thought.) >> >> > ------------------------------------------- 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: Michael Garretson: pstc_ad...@garretson.org Dave Heald davehe...@mediaone.net 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: No longer online until our new server is brought online and the old messages are imported into the new server. ------------------------------------------- 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: Michael Garretson: pstc_ad...@garretson.org Dave Heald davehe...@mediaone.net 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: No longer online until our new server is brought online and the old messages are imported into the new server.
