I'm old enough, Ken, to remember ADF approaches! But laptop switchers often operate inband to frequencies used by aviation non-directional beacons. This makes them more of a threat than the harmonics from lower-frequency ones. It is also, of course, possible for the laptop's other emissions to interfere with an ILS or VOR receiver.
Some of the complaints I've seen have not been rationally explicable, however. For example, at one of my former employer's (no longer in existence) a report was received that a laptop caused an aircraft to bank two degrees. I've worked with aircraft stabilization systems, and I've yet to figure out a mechanism how that could happen. Cortland (What I write here is mine alone. My employer does not Concur, agree or else endorse These words, their tone, or thought.) Ken Javor wrote: > In my experience it is EXTREMELY unlikely that > personal electronics could have disturbed ADF > heading indication. The ADF sensor is an > electrostatically shielded loop which is mounted > typically on the belly of a transport class > aircraft, well away from any passenger-conveyed > intense sources of magnetic fields. The loop is > very insensitive and requires quite a bit of > magnetic field to respond and is completely > insensitive to electric fields altogether. > Further, no one would use ADF to line up an > approach on a runway. > > ------------------------------------------- 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.
