饋線自動化系統采用有線中繼通信方式，實現分站和各個FTU 的通信，分站和分站之間的通信，分站和主站之間的通信。用四頻復用FSK 數字調制體制，通過對四個副載波的合理調配，在一條線路上實現多路、多種類型的通信。文中著重分析了通信網中信息傳輸的基本原理，線路收發器中信息的調制與解調的過程和實現方法。
關鍵詞： 饋線自動化 FSK 有線通信 MODEM
Abstract： The feeder automation (FA) system is based on relayed wire communication in order to achieve communication between substation and every FTU, and each substation, and the main station. Using four-frequency reuse FSK digital modulation technology and properly adjusting the four carrier waves, this paper describes how to realize multi-route and multi-kinds signals transmit within a communication line in the feeder automation system. It emphasized on the transmission principle of the information in the communication net, and emphasized on the realization method how to modulate and demodulate in the line transceiver.
Keywords : FA FSK wire communications MODEM