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Article #17579Re: Communication over power lines - is it legal?
From: Daniel F. Luna
Date: Fri, 08 May 1987 08:18
Date: Fri, 08 May 1987 08:18
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>My question is this: Does the power company get upset if you >introduce a low-level (~1 volt peak-to-peak) high freq. (> 10 kHz) >onto their lines (interior to your home). It is done all the time at AM frequencies (550kHz to 1600kHz) in the form of carrier current radio stations. In addition, the power company itself uses this medium on the high voltage system to transmit information between substations. The "BSR" system uses this method, as well. So as far as I know, it is OKEY DOKEY. The limiting factor is whether it will interfere. FCC rules say that if it interferes, you have to correct the interference, otherwise, it's ok. In the AM carrier current realm, there is a formula which determines signal strength at a specific distance. Distance is proportional to inverse frequency, so likely the audio range is quite ok. Industrial signalling equipment does this within complexes, and is also ok. -- Daniel F. Luna PC-Person. uucp: ...rochester!ur-tut!alab arpa: ur-tut!alab@rochester
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Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Path: arc1-ca.pugleaf.net!utzoo!mnetor!seismo!rochester!ur-tut!alab From: alab@ur-tut.UUCP (Daniel F. Luna) Newsgroups: sci.electronics Subject: Re: Communication over power lines - is it legal? Message-ID: <1286@ur-tut.UUCP> Date: Fri, 8-May-87 04:18:05 EDT Article-I.D.: ur-tut.1286 Posted: Fri May 8 04:18:05 1987 Date-Received: Sat, 9-May-87 18:47:05 EDT References: <3271@ece-csc.UUCP> Reply-To: alab@tut.cc.rochester.edu.UUCP (Daniel F. Luna) Organization: Univ. of Rochester Computing Center Lines: 25