AM holds other advantages over FM, as well. No capture effect, so it's easier to tell if another station was transmitting at the same time. And it wouldn't just be the FAA's radios that would have to be replaced. No payback for such a change.
Ghery S. Pettit -----Original Message----- From: Sundstrom, Mike [mailto:mike.sundst...@garmin.com] Sent: Wednesday, June 04, 2014 12:11 PM To: EMC-PSTC@LISTSERV.IEEE.ORG Subject: Re: [PSES] radiated emissions testing may understate actual emissions, an example using a class D stereo amp I'm pretty sure that: The only reason the FAA is still using AM is they don't have the money to replace all the AM radios in use. Michael Sundstrom Garmin Compliance Engineer 2-2606 (913) 440-1540 Whatever your discipline, become a student of excellence in all things. Take every opportunity to observe people who manifest the qualities of mastery. These models of excellence will inspire you and guide you toward the fulfillment of your highest potential." -- Tony Buzan and Michael Gelb, authors -----Original Message----- From: ce-test, qualified testing bv - Gert Gremmen [mailto:g.grem...@cetest.nl] Sent: Wednesday, June 04, 2014 1:06 PM To: EMC-PSTC@LISTSERV.IEEE.ORG Subject: Re: [PSES] radiated emissions testing may understate actual emissions, an example using a class D stereo amp Airplanes use AM for critical communications between airport and plane. A reliable connection may be the difference between a safe landing and a crash. Especially when flying low over LED lamps.... Gert -----Oorspronkelijk bericht----- Van: Rick Busche [mailto:rick.bus...@qnergy.com] Verzonden: woensdag 4 juni 2014 19:26 Aan: EMC-PSTC@LISTSERV.IEEE.ORG Onderwerp: Re: [PSES] radiated emissions testing may understate actual emissions, an example using a class D stereo amp Do we still have AM? Someone once called that was Ancient Modulation. :) I suspect that in a few years fluorescent lamps will give way to LED technology. As a side note, do LED lamps create EMI concerns? -----Original Message----- From: Richard Nute [mailto:ri...@ieee.org] Sent: Wednesday, June 04, 2014 11:02 AM To: EMC-PSTC@LISTSERV.IEEE.ORG Subject: Re: [PSES] radiated emissions testing may understate actual emissions, an example using a class D stereo amp On 6/4/2014 9:47 AM, Mike Violette wrote: "Class B limits are amazingly conservative, to which large populations of devices ascribe." Try using an ordinary AM radio beside a compact fluorescent lamp as on a beside table. - ---------------------------------------------------------------- This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. 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