How they workIt wouldn't surprise me if they did just check every home without a license to see if they had a TV.
However, TVs use a type of radio receiver circuit called a Superhet, which generates an intermediate frequency lower than the frequency it's listening to; this can be detected using very sensitive equipment.
Well, you did ask.
(However, TVs use a type of radio receiver circuit called a Superhet, which generates an intermediate frequency lower than the frequency it's listening to; this can be detected using very sensitive equipment.
Well, you did ask.
JimM,
Wed 19 May 2004, 11:47,
archived)