Path: utzoo!utgpu!jarvis.csri.toronto.edu!rutgers!apple!oliveb!amdahl!kelly From: kelly@uts.amdahl.com (Kelly Goen) Newsgroups: sci.electronics Subject: Re: Radar Theory Message-ID: <57YE02kP7fuL01@amdahl.uts.amdahl.com> Date: 16 Jan 90 09:54:05 GMT References: <1990Jan12.042446.8799@waikato.ac.nz> <1990Jan15.164544.29488@utzoo.uucp> Reply-To: kelly@amdahl.uts.amdahl.com (Kelly Goen) Organization: Amdahl Corporation, Sunnyvale CA Lines: 40 In article <1990Jan15.164544.29488@utzoo.uucp> henry@utzoo.uucp (Henry Spencer) writes: >In article <1990Jan12.042446.8799@waikato.ac.nz> spt@waikato.ac.nz (Simon Travaglia) writes: >>What's to stop you syncing in with the Speed Detector and sending >>back info to say that you are doing 500mph? >>... And when you get stopped in your 1963 1.3l ford for pulling >>540mph, you need simply say "Yeah sure..." >> "...take me to court" > >And he'll say "That sure is an interesting-looking gadget on your dashboard >there..." > > "...You're under arrest. You have the right to remain silent..." > >Quite apart from the small matter of you not being licensed to transmit >in the police-radar bands, both the police and the courts would probably >consider this "obstructing a police officer in the performance of his >duties". Which is a far more serious crime than speeding. "Serious" as >in "jail sentence and criminal record". > >Legal aspects aside, there's nothing hard about sending back a false signal >that overpowers the real one (the radar probably locks onto the strongest >signal, and reflections are fairly weak), although you'd have to be careful >to stay within the limits of the radar unit. A signal saying "500 mph" is >probably beyond what the radar's electronics are willing to consider as >plausible, and possibly beyond what they can receive at all. That is, it >might just light up its "something's wrong" light, or it might ignore your >signal altogether and go for the next strongest one. >-- >1972: Saturn V #15 flight-ready| Henry Spencer at U of Toronto Zoology >1990: birds nesting in engines | uunet!attcan!utzoo!henry henry@zoo.toronto.edu CHeck out of copies of 73 magazine , Ham Radio(for 10.525 ghz designs) and Radio Electronics(had a radar calibrator article a few years ago) also Car and driver had an excellant article on Baseband Pulse jamming techniqu a few years ago... AND as long as we are on the subject I have a set of the Benton Harbor Instrument "RADAR CALIBRATOR" boards built up... anyone know where I can find dual band X+K 150mw output Gunnplexor modules??? cheers kelly