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From: jhc@mtung.UUCP (Jonathan Clark)
Newsgroups: net.auto
Subject: radar detectors and Newark Airport
Message-ID: <631@mtung.UUCP>
Date: Wed, 20-Nov-85 18:15:49 EST
Article-I.D.: mtung.631
Posted: Wed Nov 20 18:15:49 1985
Date-Received: Thu, 21-Nov-85 05:24:53 EST
References: <386@gcc-milo.ARPA> <558@moncol.UUCP> <466@mtunf.UUCP>
Reply-To: jhc@mtung.UUCP (Jonathan Clark)
Organization: AT&T Information Systems Laboratories, Holmdel, NJ
Lines: 27
Summary: 

Actually I think that the reason that radar detectors
(Escort and Passport, both of which feature the ST/O/P
circuitry) go off at Newark Airport is either the large
number of automatic door openers pointing towards the Pike,
or just radar noise from the ground approach and other
radar systems which are 'live'. Certainly there is no
correlation between received signal strength and the way
that that giant rotating antenna is pointing (I think that
is the ground approach system).  Driving along route 1/9
*behind* EWR results in no annoying beeps (except real
ones!).

I suspect that you would have a good chance of getting a
radar ticket thrown out if you could prove that there was
some other signal in the correct band in the area. In this
case you might be able to prove 'reasonable doubt' that the
radar gun was not reading back the wrong signal and getting
confused.  Anyone out there know how police radar guns are
built? It would be possible to modulate the 'send' signal
and then compare this against the 'receive', hence doing
away with this line of defence. Do any models actually do
this?
-- 
Jonathan Clark
[NAC]!mtung!jhc

My walk has become rather more silly lately.