论文部分内容阅读
电子工业部三十所在对时分制和乒乓法的基带信号传输技术进行深入研究的基础上,最近研制成功了一种采用80kb/s速率传输体制的、信号速率为32kb/s的二线基带信号调制解调器,并顺利地联通了32门数字程控交换机。试验表明,传输衰耗为35分贝时误码率不大于10~(-6)。该调解器数字电路的时间配合、相位关系和同步电路的设计都很巧妙,既节省了器件,又满足了技术要求,且有利于大批量生产。另外,设计者还对均衡、再生判决收发转换电路进行了研究和反复试验,选择了较简单易行的方案,实用效果令人满意。该调解器的研制成功在一定范围内较好地解决了目前国内存在的基带信号二线传输问题。这项技术还可以开发其他速率的同类产品,以满足不同用户的要求。
Thirty of the Ministry of Electronics Industry conducted an in-depth study on the baseband signal transmission technology of the time-sharing system and the ping-pong method. Recently, a 2-wire baseband signal modem with a signal transmission rate of 32kb / s using a 80kb / s rate transmission system was successfully developed , And smoothly connected 32 digital program-controlled switches. Experiments show that when the transmission loss is 35 dB, the bit error rate is no more than 10 ~ (-6). The timing of the digital circuit with the regulator, the phase relationship and synchronization circuit design are very clever, saving the device, but also to meet the technical requirements, and is conducive to mass production. In addition, the designer also conducted research and trial and error on the equalizer and regenerator decision-making transceiver circuit, and chose a simpler and safer solution. The practical effect is satisfying. The successful development of the modem solves the problem of the second-line transmission of the baseband signal in China within a certain range. The technology can also develop similar products at other rates to meet the needs of different users.