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Cable television systems are a means for transmitting television channels via optical fibers or coaxial cables. Traditional broadcast television uses radio waves that go out over the air, and so are only available within a certain distance of the transmitter. They are also vulnerable to being “blocked” by mountains and tall buildings. Cable television systems are currently in about half of American households. Cable television systems are available in either basic analog or the newer digital. While generally more expensive, digital cable usually offers more channels, including music stations and interactive programming guides. Digital cable is often provided in conjunction with a digital video recorder, which allows users to record television programs without needing a VCR or blank video tape.
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