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在电缆电视技术领域中工作的人,大多在中学、技术学校或军事学校里受过一些基本电气技术训练。有很多书和教材讲述电气基本知识,所以,这里只复习用于电缆电视系统中的某些基本内容。 从根本上讲,可以把电缆电视系统看成一个信号发生器,它激励向用户终端负载传送信号的电缆系统。实际上,电缆电视系统是由很多个系统组合而成。当独立看待时,很多电路都是很简单的,所以,下面复习某些简单的电气系统。
Most people working in cable television technology have some basic electrical training in high school, technical school or military school. There are many books and textbooks on electrical basic knowledge, so here only review some of the basic content used in cable television system. Fundamentally, cable television systems can be viewed as a signal generator that excites cable systems that carry signals to the user terminals. In fact, cable television system is composed of many systems. Many circuits are simple when viewed independently, so here’s a review of some simple electrical systems.