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首先对有线电视的基本业务、扩充业务、增值业务以及双向传输系统的概念作了介绍 ,说明了实现双向传输的方法、上行信号的频率范围、双向HFC系统的组成 ,分别介绍了光缆传输和电缆分配系统对上行信号的处理方法以及双向系统的特点及注意事项 ,还对双向滤波器、双向放大器、上行信号的容量与调制、传输系统的自动控制作了说明 ,最后对双向HFC系统的设计和上行信号三大指标的验算方法作了探讨。
First introduced the basic business of cable TV, extended services, value-added services and the concept of two-way transmission system, describes the two-way transmission method, the uplink signal frequency range, the composition of two-way HFC system, respectively, introduced fiber optic cable transmission and cable Distribution system on the uplink signal processing methods and two-way system features and precautions, but also on the two-way filter, two-way amplifier, uplink signal capacity and modulation, automatic transmission system was described, the last of the two-way HFC system design and The three indicators of the uplink signal checking methods were discussed.