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From: popyackl@lonex.radc.af.mil (Leonard J. Popyack)
Newsgroups: sci.electronics
Subject: Re: Library anti-theft walk-thru device...????
Message-ID: <1991May13.153747.22172@lonex.radc.af.mil>
Date: 13 May 91 15:37:47 GMT
References: <050691.224256WDBURNS%MTUS5.BITNET> <3206@sirius.ucs.adelaide.edu.au> <91127.230228ART100@psuvm.psu.edu>
Organization: RADC
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In article <91127.230228ART100@psuvm.psu.edu> ART100@psuvm.psu.edu (Andy Tefft) writes:
>I have a friend who uses an electric wheelchair, and
>at his local video store, the alarm goes off when he leaves the
>store, but not when he comes in (you go through the detector either
>way), whether he has any movies (properly desensitized) or not.
>Why would this be?

try going through backwards.