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供电系统远动化及功率总加技术的发展,迫切需要解决与现有电话复用的数据传输系统。为此,研制了传输速率为200~b/s的远动与电话复用的数传设备。为了扩大本设备的使用范围,采用频率划分制,总共可提供13种频谱。通讯距离基本上可满足供电系统远动及功率总加信号传输的需要。 本文阐述了制式和总体设计方面的问题,提出了采用间接调频方式的好处。由于采用了间接调频方案,使得低频端较易实现,移频振荡器鉴频器从频率的低端到高端的性能的一致性较好,简化了设计,便于调试。文中着重分析了移频振荡器、鉴频器达到稳定工作的条件、参数选择。对装置的工作过程作了简要说明。 装置在线路上运行实测误码率达到10~(-5)～10~(-6)数量级。
Power supply system and the total power of remote technology, the urgent need to solve the existing telephone multiplexing data transmission system. To this end, developed a transmission rate of 200 ~ b / s remote and telephone multiplexing data transmission equipment. In order to expand the use of this equipment, the use of frequency allocation system, a total of 13 kinds of spectrum can be provided. Communication distance can basically meet the power supply system and the total signal power transmission plus remote needs. This article describes the system and the overall design issues and proposes the benefits of using indirect frequency modulation. As a result of indirect frequency modulation scheme, making the low-frequency terminal easier to achieve, frequency-shift oscillator frequency discriminator from low to high performance of the consistency of the better, simplifying the design, easy to debug. This article focuses on the analysis of the frequency-shift oscillator, frequency discriminator to achieve stable conditions, the choice of parameters. The work of the device made a brief description. The measured bit error rate of the device running on the line reaches the order of 10 ~ (-5) ~ 10 ~ (-6).