Entertainment and Interference: The Two Faces of CATV
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چکیده
c able television (CATV) was known originally as "community antenna television." Today it represents the broad area of entertainment and other services carried over coaxial cable networks to various subscribers, As implied by the name, the original purpose of CATV was to serve communities with entertainment television service where TV reception was poor, The idea was to find one good receiving site, pick up signals from local and distant TV transmitters, and relay these signais by ulay of coaxial cahle to residents of the community. This concept was applied widely, and many people enjoyed satisfactory TV reception through these systems. In the early days a few channels were distributed within the vhf band. The limit was generally the 12-channel capacity of the standard vhf television receiver. Many 12-channel cable systems are still in operation. Cahle television has not always been an economic success. Therefore, in resent years, systems have been enlarged to carry many more channels with particular etnphasis on premium entertainment services such as Home Box Office and Show 'Time. Today, sophisticated CATV installations offer high capacity and quality in essentially closed communication systems. A wide variety of quality equipment is
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