文档介绍：多路RS-232信号数据光端机设计
摘要
由于光纤作为传输媒介具有频带宽、容量大、抗干扰性强等特点,在通信领域,光纤通信越来越显示出其优越性和不可阻挡的应用趋势。光纤也不仅仅用于数字通信中,还可以用于工业生产的现场监控,有线电视(CATV)系统等。而光端机作为整个光纤通信系统的一部分,将起很大的作用,它的性能、发展对整个系统的性能和发展都有很大的影响。
本文介绍了一种基于RS-232C串行口通过光纤传输数据的电路,很好的实现中短距离的点对点通信。首先对整个光通信系统进行了介绍,再对各多路数据通信及光发射、光接收原理及实用电路进行介绍。同时对本设计所采用的电路做详细的说明。
本设计采用公司的LED组件光发送模块HFBR-1414和光接收模块HFBR-2416作为核心器件,由于其高速、低功耗、线性等特点,再加上响应速度快的74ACTQ00驱动电路,能较好的完成光发送和光接收的功能。为了进一步利用光纤巨大的带宽资源以及使此数据光端机能传输更多不同的数据信号,本设计采用了八路时分复用技术,复用部分电路基本上采用的是MOTOROLA公司的芯片,有效的利用了DSI(MC145428)及移位寄存器(MC14015B)的功能。
关键词光端机, 多路复用, RS-232
ABSTRACT
Serve as the media of transmission; the optic fiber has the characteristics of the wideness of frequency band, the great capacity and the strong ability resisting the interference. So at the realm of munication, the optic munication more and more demonstrates its superiority and the tendency of application for irresistible force. Optic fiber not only used for munication but also used for the locale of industrial production, the system of cabled TV and so on. It will be widely used for munication. As a part of the munication system, the transmitter and the receiver will conduct great function, its capability and development will influence the whole system.
This article will introduce a circuit base RS-232 serial port transmitting by the optical fiber, nicely realizes the point to point’ communication for middle and short-distance. First, introduce the whole system of munication, then, introduce the practical circuit. At the same time, declare at the circuit of this devise in detail.
This devise in use the ponent, model block of optical dispatch HFBR-1414 and optical reception HFBR-2416 pany for the nuclear device, for its characteristics of high speed, low power consumption, linear so on, and with the drive circuit 74ACTQ00 which has the high speed of the response, it plete the function of the sending and receiving well. For further make use of taking of fiber optic bigness the breadth resources and made this data the light