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From: philip@axis.UUCP
Newsgroups: mod.telecom
Subject: Re: range of car alarms
Message-ID: <8610310657.AA22042@ucbvax.berkeley.edu>
Date: Fri, 31-Oct-86 01:58:35 EST
Article-I.D.: ucbvax.8610310657.AA22042
Posted: Fri Oct 31 01:58:35 1986
Date-Received: Fri, 31-Oct-86 14:36:30 EST
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Reply-To: mcvax!axis!philip@seismo.CSS.GOV (Philip Peake)
Organization: Axis Digital, 135 rue d'Aguesseau, Boulogne, 92100, FRANCE
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Your problem is a very common one with radio communications.
Most large buildings (shopping centers being generaly the worst) just seem
to stop dead almost all radio communications.

I have had similar experiences with ham radio equipment, in one case
a local repeater (less than a mile away, running 25 watts) just vanished
upon entering a department store.

I really don't see much hope for your system working in such circumstances.

You can probably console yourself with the fact that even if you get
your warning while more than a few hundred feet away from the car, by
the time you get there either the car or its contents will be long gone.

Philip