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- From: birmingh@fnalnd.fnal.gov (Phillip J. Birmingham)
- Newsgroups: sci.electronics
- Subject: Re: How can a radar detector bedetected?
- Date: 20 Nov 92 03:56:21 -0600
- Organization: Blackriver Recorporations, Inc.
- Lines: 20
- Message-ID: <1992Nov20.035621.1@fnalnd.fnal.gov>
- References: <18NOV92.13820140.0036@music.mus.polymtl.ca>
- NNTP-Posting-Host: fnalnd.fnal.gov
-
- In article <18NOV92.13820140.0036@music.mus.polymtl.ca>, CT64@music.mus.polymtl.ca (Nicolas Gauvin) writes:
- > A friend of mine recently got arrested because he was using a radar
- > detector. The cops actually used some kind of device to detect its
- > radar detector. How is this possible? Isn't a radar detector something
- > that only receives but emits nothing?
- >
- >
- > Nicolas Gauvin
- > gauvinn@info.polymtl.ca
-
- Most sensitive radio/radar receivers use the superheterodyne
- principle, where you mix the received signal with a signal of a known
- frequency. This requires a local oscillator, which emits RF that can be
- detected. This is the reason that you may not use radios on airliners;
- the airline is afraid that the local oscillator will screw up the
- navigation instruments.
-
- --
- Phillip J. Birmingham birmingh@fnal.fnal.gov
- I don't speak for Fermilab, although my mouth is probably big enough...
-