It has to do with the way the digital signal encodes the image. An analog television sends the entire image every 1/30th of a second, but can't make a very sharp image because of the amount of spectrum required to send fine details. A digital signal only sends the differences from one frame to the next, so when you first acquire the signal you have to wait until the entire picture has changed before you see it. In the older digital systems, you could actually see it building the picture in blocks.
The advantage to digital television is that because its not sending the entire image for every frame, you can get a lot more information, (i.e, a sharper picture) in less bandwidth.
If you have an older analog television, remember that you can't see a better picture than the analog TV is capable of displaying, regardless of how sharp a picture the digital receiver is capable of generating. Analog TV's tend to "fuzz" the picture a little so that interference isn't as obvious, and this "fuzzy" picture is the best you'll ever see on that particular TV.
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Today's Featured Article - Show Coverage: Godfrey, Illinois Country Days - by Cindy Ladage. Except for last fourth of July's Old Gold show in Springfield, Illinois, I don't remember when it was so hot. Nevertheless, the heat didn't keep vendors and visitors alike from enjoying the third annual Country Day's Event. Jane Elliott said the event was originally a one man show. "Barry Seiler, owner of Country Town Farm Supply store used to invite people up to the Johne Deere store. He would give hats and a free meal for everyone that brings a tractor." Elliott said while this
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