Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Posting-Version: version B 2.10.1 6/24/83; site eosp1.UUCP Path: utzoo!watmath!clyde!burl!ulysses!allegra!princeton!eosp1!lincoln From: lincoln@eosp1.UUCP (Dick Lincoln) Newsgroups: net.auto Subject: Re: Detectors Triggering Other Detectors Message-ID: <1076@eosp1.UUCP> Date: Mon, 20-Aug-84 16:55:07 EDT Article-I.D.: eosp1.1076 Posted: Mon Aug 20 16:55:07 1984 Date-Received: Tue, 21-Aug-84 00:39:51 EDT References: <1605@pegasus.UUCP> <2970@watcgl.UUCP> Organization: Exxon Office Systems, Princeton, NJ Lines: 18 > A cheap radar detector does not have to emit much energy for it to be > detected by another nearby radar detector when there is no real radar > signal present.... Also, a simple continuous-wave microwave signal > in the right frequency range is enough for a radar detector to decide > that there is a transmitter out there somewhere..... Radar detectors > just look for the presence of a signal which is assumed to mean that > there is a radar unit nearby..... Not so with relatively recent vintage Escorts from Cincinnatti Microwave. They have circuitry to be sure they are receiving pulse modulated signals, as any real range or velocity measuring radar device must use. Leakage from super-het receiver oscillators is an unmodulated signal which can block an Escort by saturating its RF front end, but not trigger a "false alarm". The biggest source of spurious alarms from Escorts are commercial X-band burglar alarms that also use (hopefully) very low power radar as motion detectors. Such radar is, of course, pulse modulated, and thus very hard to distinguish from police radar.