Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!cs.utexas.edu!uunet!nuchat!sugar!karl From: karl@sugar.hackercorp.com (Karl Lehenbauer) Newsgroups: comp.sys.amiga Subject: Re: Radio Wave Interference Message-ID: <4209@sugar.hackercorp.com> Date: 25 Sep 89 01:56:51 GMT References: <376@batman.moravian.EDU> <22359@cup.portal.com> <6369@watdcsu.waterloo.edu> Reply-To: karl@sugar.hackercorp.com (Karl Lehenbauer) Organization: Sugar Land Unix - Houston Lines: 24 In article <6369@watdcsu.waterloo.edu> mgardi@watdcsu.waterloo.edu (M.Gardi - ICR) writes: >We just purchased a GE cord-less telephone. >RRRRRRIIIIIIIIIINNNNNNNNNNGGGGG!. >...ringing only occurred when the actual Leader Board screen was being >displayed on the Amiga.... >Anybody have any clues as to what Leader Board might be doing when this >happens? Congratulations, you can now page your cordless phone from your Amiga :-) Well, the computer generates a lot of RF, and it's different based on what it's doing. To prove this, just get an FM radio, put it next to your computer, and tune it until you get a bunch of noise. Now run different programs, format floppies, etc. Wildly different sounds. It just happens that some combination of the program loop, data being displayed on the screen, etc, is generating the "right" RFI at a close enough frequency (or harmonic of the frequency) to make your rather stupid and unshielded (no offense) cordless phone freak out. -- -- uunet!sugar!karl "There is hopeful symbolism in the fact that -- flags do not wave in a vacuum." -- Arthur C. Clarke -- Usenet access: (713) 438-5018