>-----Original Message----- >From: Kurt Fischer [mailto:kurt.fisc...@hyperinterop.com] >Sent: Tuesday, February 11, 2003 7:03 AM >To: emc-p...@majordomo.ieee.org >Subject: Real product interference source at 121 MHz > > >Hello all, > >A strange request but this has become an interference issue >with a sattelite communications link There seems to be a very >strong interferer at 121 MHz that is intermittent in nature >and physically located in Northern USA/Canada. > >It could be the marketing of a non-compliant consumer products >or perhaps some after market sattelite rec. retro-fit kit?? > >Has anyone else had this experience in the last year --- (the >problem was not present 2 years ago)? >It does appear to getting worse and is spreading >geographically as well. > >Regards, >Kurt Fischer >Hyper Corp >N,j�^ A污Ȟ#ˡ&zܓyg峉ƥ >^y汯\v+ "ྡྷybb�+h nȭya† >0{by種̡ޙ?�\慢: jw *.˛ >بǧvf&j:+v飉瞢0m䠅" ^ࠖ){.n+娉l孵h�ǧvf-夅b�)²ڶF駉�צr-r z(& >ྫ †u֯z֭ah%̪-銉̱ݙbrtۭzxy+!zi^'z!岊ⱷ p{ॕǢ{^Პ+bwᧀWr-r,)౪jᙷ >!jwlyᥪz᥉ ma其⁅ >0r젉x(ഠl >
Kurt: Looks like you're also getting some interference to your sig! Seriously, this is in the Aeronautical Mobile allocation, and I would think that any unauthorized emissions at that frequency would be an extremely high priority for FCC and FAA attention. IIRC, many airports have DF equipment to quickly find local emissions. OTOH, if you are being harmed by an authorized emitter, then you have a tough problem. Isn't 121.5 MHz allocated to EPIRB's and ELT's? And I understand that these beacons are being slowly forced to a 400 MHz frequency? I think you'll need to tell us more about your victim system and what you know about the interfering source(s). Regards, Ed Ed Price ed.pr...@cubic.com Electromagnetic Compatibility Lab Cubic Defense Systems San Diego, CA USA 858-505-2780 (Voice) 858-505-1583 (Fax) Military & Avionics EMC 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. 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 Archive is being moved, we will announce when it is back on-line. All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc
