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共用电视天线系统(英文缩写为CATV)是一种利用同轴电缆进行宽频带传输音像信号的系统。它接收功率大,不但可以改善电视信号的接收效果,提高音像质量,而且可以传输调频广播节目。近年来,其应用范围日渐扩大。因此,CATV系统的设计已成为建筑电气设计中的一个重要内容。 前端设备主要包括天线放大器、混合器及主干放大器等,是CATV系统中最重要的组成部分。其主要任务是进行电视信号接收后的处理,包括信号放大、
The common TV antenna system (abbreviated as CATV in English) is a system that uses coaxial cable to transmit audio and visual signals over a wide band. It receives large power, not only can improve the receiving effect of the television signal, improve audio and video quality, and can transmit FM radio programs. In recent years, its scope of application is expanding. Therefore, the design of CATV system has become an important part of the electrical design of buildings. Front-end equipment, including antenna amplifiers, mixers and trunk amplifiers, is the most important part of the CATV system. Its main task is to receive the television signal processing, including signal amplification,