Broadband rf detectors can see a signal on the order of 1 V/m, which is good enough to catch an intentional transmission. Unintentional emissions are controlled to levels between 24-60 dBuV/m, in order to protect aircraft radios, and those levels cannot be measured with a cheap and reliable rf detector. Ken Javor Phone: (256) 650-5261
> From: John Woodgate <[email protected]> > Date: Mon, 19 Mar 2012 16:01:43 +0000 > To: <[email protected]> > Subject: Re: [PSES] New immunity testing by the FAA in the future? > > In message <cb8cb701.1c203%[email protected]>, dated Mon, 19 > Mar 2012, Ken Javor <[email protected]> writes: > >> Agree on all accounts except one: >> >> "Envision future airplanes with RF detectors at every seat. If >> emissions were detected, a red light next to the isle seat could turn >> on." > > I don't know who wrote that, because I didn't receive it and Ken didn't > actually leave it appended. It seems worth pursuing. > >> >> It isn't the intentional emissions that are a hazard to the aircraft; >> it's unintentional, and those are too low-level to register in an rf >> detector. > > But if they are too low to be detected, how can they interfere with the > aircraft systems? The 'detector' would need to be a scanner, to get > enough signal-to-noise ratio. > -- > OOO - Own Opinions Only. Try www.jmwa.demon.co.uk and www.isce.org.uk > John Woodgate, J M Woodgate and Associates, Rayleigh, Essex UK > If 'QWERTY' is an English keyboard, what language is 'WYSIWYG' for? > > - > ---------------------------------------------------------------- > This message is from the IEEE Product Safety Engineering Society emc-pstc > discussion list. To post a message to the list, send your e-mail to > <[email protected]> > > All emc-pstc postings are archived and searchable on the web at: > http://www.ieee-pses.org/emc-pstc.html > > Attachments are not permitted but the IEEE PSES Online Communities site at > http://product-compliance.oc.ieee.org/ can be used for graphics (in well-used > formats), large files, etc. > > Website: http://www.ieee-pses.org/ > Instructions: http://listserv.ieee.org/request/user-guide.html > List rules: http://www.ieee-pses.org/listrules.html > > For help, send mail to the list administrators: > Scott Douglas <[email protected]> > Mike Cantwell <[email protected]> > > For policy questions, send mail to: > Jim Bacher: <[email protected]> > David Heald: <[email protected]> - ---------------------------------------------------------------- This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. To post a message to the list, send your e-mail to <[email protected]> All emc-pstc postings are archived and searchable on the web at: http://www.ieee-pses.org/emc-pstc.html Attachments are not permitted but the IEEE PSES Online Communities site at http://product-compliance.oc.ieee.org/ can be used for graphics (in well-used formats), large files, etc. Website: http://www.ieee-pses.org/ Instructions: http://listserv.ieee.org/request/user-guide.html List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas <[email protected]> Mike Cantwell <[email protected]> For policy questions, send mail to: Jim Bacher: <[email protected]> David Heald: <[email protected]>
