摘要
高精度时钟同步是海洋水下分布式同步观测的关键技术之一.针对温度补偿晶振在高精度时钟同步应用中的二次标定需求,给出了一种基于GPS、数控高精度恒温槽的温度补偿晶振自动标定与测试系统.带有温度测量和压控输入的温度补偿晶振模块放入高精度数控恒温槽中,系统根据温度补偿晶振模块与GPS的高精度时钟偏差自动调整其压控输入,获得并记录各个温度点的温度测量值与压控输入值.测试结果表明,可将被测温度补偿晶振模块的频率稳定度由5.5～6.3×10^-8提高到1.5～5.4×10^-9.
High precision clock synchronization is one of the key technologies of distributed marine underwater synchronous obser-vation system.For the second calibration of TCXO (temperature compensated crystal oscillator)in applications of high precision clock synchronization,a GPS and high precision numerical control constant temperature groove is proposed to design automatic calibration and test system of TCXO.TCXO with temperature measurement and voltage controlled input is put into the numerical control constant temperature groove.The system adjusts voltage controlled input of TCXO in real time according to the deviation of frequency with TCXO and GPS signal,and records the temperature measurement of TCXO and voltage controlled input once reaching the calibration deviation requirements.The test results show that the frequency stability of the designed TCXO is im-proved from 5.5-6.3×10-8 to 1.5-5.4×10-9 .
出处
《中国科技论文》
CAS
北大核心
2015年第14期1730-1734,共5页
China Sciencepaper
基金
高等学校博士学科点专项科研基金资助项目(20120132120006)
国家高技术研究发展计划(863计划)资助项目(2012AA09A201)
中央高校基本科研业务费专项资金资助项目(201213004)
