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从两方面论述数字编码波形在长线上传输的影响因素及其改善措施。通过分析并经实验表明，长线的分布电容影响通常居诸因素之首位。改进长线驱动电路，在一定程度上，可改善其传输波形之质量。另外，可利用长线传输波形的同时，还传输供总线接口电路需要的电源能量，满足总线浮空隔离的要求，有效地抑制了共模干扰。此项技术适用于远距多路串行总线的数据采集系统。
Discuss the Influencing Factors and Improving Measures of Digitally Coded Waveform Transmission on Long Line from Two Aspects. Through analysis and experiments show that long-term distribution of capacitance usually affect the first place of these factors. Improve the long-term drive circuit, to a certain extent, can improve the quality of its transmission waveform. In addition, the long-line transmission waveform can be used at the same time, also for the bus interface circuit power supply required to meet the requirements of the bus floating isolated effectively inhibit the common mode interference. This technology is suitable for long-distance multi-channel serial bus data acquisition system.