Plus, if one of the amplifiers failed, you lost the picture. "With each amplifier, you would get noise and distortion. "In a cable system, the signal might have gone through 30 or 40 amplifiers before reaching your house, one every 1,000 feet or so," Wall says. According to Bill Wall, technical director for subscriber networks at Scientific-Atlanta, a leading maker of equipment for cable television systems, limitations in these amplifiers were a significant issue for cable system designers in the next three decades. Because the signal from the antenna became weaker as it traveled through the length of cable, cable providers had to insert amplifiers at regular intervals to boost the strength of the signal and make it acceptable for viewing. The earliest cable systems were, in effect, strategically placed antennas with very long cables connecting them to subscribers' television sets. Some cable systems even let you make telephone calls and receive new programming technologies! In this article, we'll show you how cable television brings you so much information and such a wide range of programs, from educational to inspirational to just plain odd. cable systems deliver hundreds of channels to some 60 million homes, while also providing a growing number of people with high-speed Internet access.
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