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一、方案要点 1.实现方法:采用分时原理,把数据源来的连续数据每八位分割成一组,另加一位同步位,共九位,以三倍的速率一组组地送入线路。这样,本端发送信号占用线路的时间约占总时间的1/3,另1/3时间供对方发送信号用,剩下1/3时间是考虑了信号在线路上传输需一定时间而设的。
First, the program points 1 method: the use of time-sharing principle, the data source to the continuous data every eight bits divided into a group, plus a synchronous bit, a total of nine, a group of three times the rate of input line. In this way, the local sending signal takes up about 1/3 of the total time of the line, another 1/3 of the time for the other party to send the signal, and the remaining one-third time takes into account that the signal needs to be transmitted on the line for a certain period of time.