一种实用光端机的设计与实现

Design and realization of a practical optical transmitter

提出了一种简易的实用光端机的设计方法,能够完成TTL/E1、RS232、RS422 3类信号经光纤传送,很好地实现了中短距离的点对点通信。TTL/E1信号直接送给通道选择,RS232和RS422分别经过相应的信号调理变为TTL电平后再送给通道选择模块;通道选择由可编程逻辑器件GAL16V8为核心编程实现,通过按键操作可实现传输信号的类型选择,并有相应的指示灯指示;采用安捷伦公司的LED组件光发送模块HFBR-1528和光接收模块HFBR-2528作为核心器件,实现光纤通信。通过实验证明,系统工作可靠,性能优越。

This paper discusses a simple and practical design of optical transceiver, which can complete TTL/E1, RS232, and RS422 by optical fiber transmission, realize at the point-to-point communication in short-distance well. TIT/El signals are set directly to channel selection, RS232 and RS422 signals are recuperated respectively through the corresponding to T＇FL level to channel selection module after. And the GAL16V8 which is CPLD was selected for the part of channel＇s choice, through programming buttons operation, it can realize the type selection signal transmission, and have corresponding indicator instructions. HFBR-1528 transmitting module and HFBR-2528 receiving module which belongs to the Agilent＇s LED components were used as the core device in the design. Through some experiments, it shows that the system is reliable and performances superiority.