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Article #11360Re: RF leakage from TV cable system
From: Scott Ferguson
Date: Mon, 09 Nov 1992 14:34
Date: Mon, 09 Nov 1992 14:34
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In article <1992Nov9.034219.29018@athena.cs.uga.edu>, mcovingt@aisun3.ai.uga.edu (Michael Covington) writes: |> |> It causes interference to other radio services. Remember that "cable |> channels," unlike real TV channels, are not allocated for TV usage outside |> the cable. For example, 155 MHz is in the middle of a cable TV channel, |> but is allocated to police radios. So if the cable signal escapes from |> the cable, the police can't hear each other. Similar things happen to |> aviation radios, hams, etc., depending on the frequency. |> Also, any cable leak that lets a signal leak _out_ will also let signals |> leak _in_, so that someone viewing TV suddenly hears the police or the |> fire department on top of his TV program... |> I live next to a Hospital, and am frequently getting interference (I think from the hospital- ambulances, etc) on Cable channel 21. The best part is, Channel 21 is the weather channel, and the interference only comes at the time when my local forecast is telling me something useful. As soon as the transmission stops, I can see which cold front from Manitoba is going through North Dakota. Could leakage in my own house be letting that interference in? If not, I guess I oughta call the cable company and demand they fix it somewhere, but then I'd cause a lot of people with splitters, descramblers, etc to get caught, huh? -- ---------------------------------------------------------------------- Scott Ferguson Exxon Research & Engineering Co. Project Engineer New Jersey ---------------------------------------------------------------------- "Always bark at a dog."
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arc1-ca.pugleaf.net!sparky!uunet!elroy.jpl.nasa.gov!swrinde!zaphod.mps.ohio-state.edu!darwin.sura.net!jvnc.net!erenj.com!rufus.erenj.com!srferguReferences:
<1992Nov7.213033.163@gems.vcu.edu> <1992Nov9.034219.29018@athena.cs.uga.edu>Show Full Headers
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Newsgroups: sci.electronics Path: arc1-ca.pugleaf.net!sparky!uunet!elroy.jpl.nasa.gov!swrinde!zaphod.mps.ohio-state.edu!darwin.sura.net!jvnc.net!erenj.com!rufus.erenj.com!srfergu From: srfergu@rufus.erenj.com (Scott Ferguson) Subject: Re: RF leakage from TV cable system Message-ID: <1992Nov9.143426.28306@erenj.com> Sender: news@erenj.com (USENET News System) Nntp-Posting-Host: rufus.erenj.com Organization: Exxon Research & Engineering Co. References: <1992Nov7.213033.163@gems.vcu.edu> <1992Nov9.034219.29018@athena.cs.uga.edu> Date: Mon, 9 Nov 1992 14:34:26 GMT Lines: 31