【摘要】 介绍了山东建筑工程学院校园电缆电视系统的设计原理。比较详细地介绍了利用对线路放大器电源的控制达到同时控制学生宿舍电视机电源与电视信号的方法 ,同时还介绍了学生宿舍能收看所有频道的“正常接收”与所有频道同时播送一个节目的“强制接收”互相切换的方法。并且给出了相关设备的内部结构和工作原理。更多还原

【Abstract】 The design principle of the campus CATV system in Shandong University of Architecture and Engineering is reviewed. The method is discussed to control TV power supply and TV signal in the dormitories at the same time by controlling the amplifier’s power. Then it’s introduced how to switch TV, tatus between "Normal Receiving"--receiving all channels and "Forced Receiving"--receiving same program in all channels. Finally the circuit drawing and the working principle are given.更多还原