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数据传输设备是计算机通信网络中的一个重要组成部分。传输设备的效能与费用是涉及通信网络发展的基本问题。本文介绍一种基带数据传输方法,用以解决计算机与十公里以内的终端进行数据传输的问题。这种方法有二个特点。一个特点是采用国产集成器件J_(272)长线驱动器作发送,J_(273)长线接收器作接收。由于它们是在差分信号的情形下工作;因此,通常线路上所存在的共横干扰,被接收器件抑制掉,从而显著地降低了误码率。器件的工作速率可以达到10兆赫;因此,这种方法不仅适用于中、低速,而且可以承担高速的数据传输。我们曾在四公里的普通塑绞线
Data transmission equipment is an important part of computer communication networks. The efficiency and cost of transmitting equipment are the basic issues involved in the development of communication networks. This article describes a baseband data transmission method to solve the computer and terminal within 10 km of data transmission problems. This method has two characteristics. A feature is the use of domestic integrated device J_ (272) long-term drive to send, J_ (273) long-term receiver for receiving. Since they work in the case of differential signals; therefore, the common horizontal crosstalk present on the line is suppressed by the receiving device, significantly reducing the bit error rate. Device operating speed can reach 10 MHz; therefore, this method is not only suitable for medium and low speed, but also can bear the high-speed data transmission. We had ordinary plastic strands in four kilometers