Interesting. What kind of range would something like a CB have? Could it be used to target a single TV set?
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Deliberate interference with digital TV signal
Is it possible to use a device to interfere with digital TV signals (including those coming in through an aerial) over a very short range? I know gadgets exist to block radio signals within a few metres (like the gadgets that enable you to listen to your ipod on a radio), but can this be done with telly?
I suspected not, but a friend is convinced that this is being done and that such gadgets are commercially available. As other people in the area are not suffering from any sort of obvious interference it must be a very short range device (less than 10 metres) if it does exist.
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Answers
All you need is something that generates sparks, such as an electric motor. If it isn't shielded, a television in a nearby room will see interference, and it isn't directional. If it's powerful enough to disrupt the picture completely, it's probably emitting excessive radiation and is probably in violation of broadcast rules. In the US, computers and every device that might generate significant EMI has to pass a test before it is permitted to be sold as a consumer product, or a license to operate it is required. I don't think CB transmitters are directional, unless it's an accidental side effect of the geography and buildings.
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by: David-HowardPosted on 2008-04-02 at 08:07:11ID: 21263825
It's absolutely possible and if you have an arial antenna you are more susceptible. L-o-n-g ago we were both the recipient and cause of jamming television signals with nothing more than home bassd CB radios. If you power anything up far enough it can cause issues.