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Article #8001Determining externally what channel a TV is tuned to?
From: Chris Elmquist
Date: Fri, 26 Oct 1990 21:53
Date: Fri, 26 Oct 1990 21:53
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1344 bytes
I've been day-dreaming about a method to determine what channel a TV is tuned to by measuring RF leakage from the tuner (or IF, or something??) Does anyone have any comments on the practicality of this? Obviously some TVs are better (err, worse?) leakers than others... I don't have to know "exactly" what channel it's tuned to.. this device would be able to make a correspondance say, between IF frequency and "tuned channel"... which might be different from one make of TV to the next... it just has to determine the difference between the channel settings. I was thinking that a very sensitive frequency counter (with additional hardware/software filtering...) might be able to measure this RF leakage and make the determination... Any other ideas how one might figure out what channel the TV is tuned to without any kind of internal or intrusive connection? Any comments appreciated-- -- Chris Elmquist, N0JCF elmquist@nachos.SSESCO.com
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Path: arc1-ca.pugleaf.net!utzoo!attcan!uunet!timbuk!cs.umn.edu!uc!nachos.SSESCO.com!elmquist From: elmquist@nachos.SSESCO.com (Chris Elmquist) Newsgroups: sci.electronics Subject: Determining externally what channel a TV is tuned to? Message-ID: <252@nachos.SSESCO.com> Date: 26 Oct 90 21:53:23 GMT Sender: elmquist@nachos.SSESCO.com Distribution: na Organization: none Lines: 23