You don’t know what DXing is? Shame on you! Turn in your shortwave radio this instant! Ok, you might know what it is but not what it’s called. ‘DX‘ means ‘Long Distatnce’ or now days ‘Distant Station’, its an amateur radio term for hearing a station that is too far away to be listened to normally. The ionosphere and all sorts of other atmospheric conditions go into creating this sort of phenomenon, even the trails leftover from meteor showers. You might hear people talking about ’skip’ as well, it’s the same thing. Radio waves skipping and reflecting from very long distances, like being in Phoenix and hearing a station in in Montana as loudly as a local station. The beauty of this is that you don’t need a real expensive radio to hear this, the one in your car is perfect. Go scan the AM bands late at night around the top and bottom of the hour and see if you can catch any out of state radio names.
Now, you might think, ‘big deal, it’s just radio… Yawn’. Well laddy, I bet you didn’t know that you can do the same thing with a TV, eh? Thats right, your TV set is pretty much a souped up radio receiver, a darn fine one at that! Now to do this you will need to unhook your cable (righty tighty, lefty loosy - don’t worry, its not illegal … yet) and attach an old fashioned UHF/VHF antenna to it. ‘Rabbit ears’ will do just fine. Get the antenna up as high as you can to optimize it’s reception, and tune to ch 2. If the conditions are right you may see a picture that’s not form a local station. The first link has loads more info on how to get the best results. It’s definitely an art form, timing is everything with this sport.

TV FM DXing
Wikipedia has a good write up on TV-FM DXing as well.