摘要
E1通信信号的精确测量和评估,对提高E1通信网的传输效率和传输质量具有重要意义。为满足E1通信信号的测量需求,基于对DDS频率合成技术的研究,设计出能稳定输出2.048 MHz频率的频率综合器。测试结果表明,该频率综合器输出频率精度可达到9.40×10^(-11) s,秒稳定度可达到2.63×10^(-11),高于待测E1信号频率稳定度3倍,满足国际电信联盟关于E1信号的测量标准,可以作为E1频率测量仪的信号源。
The precise measurement and evaluation of E1 communication signal is important to improve the transmission efficiency and transmission quality of E1 communication network.In order to meet the measurement requirements of E1 communication signal,a frequency synthesizer with stable output of 2.048 MHz is designed based on the research of DDS frequency synthesis technology.The test results shown that the accuracy of the output frequency by the frequency synthesizer can reach to 9.40×10^(-11 )s,and the second stability can reach to 2.63×10^(-11),it is three times higher than the frequency stability of E1 signal which needs to be tested.The stability meets the measurement standard of the International Telecommunication Union for E1 signal,and can be used as the signal source of E1 frequency measuring instrument.
作者
付强
郭伟
刘强
FU Qiang;GUO Wei;LIU Qiang(National Time Service Center,Chinese Academy of Sciences,Xi’an 710600,China;School of Electronics and Communication Engineering,University of Chinese Academy of Sciences,Beijing 101048,China)
出处
《时间频率学报》
CSCD
2021年第1期17-25,共9页
Journal of Time and Frequency
基金
中国科学院前沿科学重点研究计划资助项目(QYZDJ-SSW-JSC034)。
