多通道双混频时差测量系统的实现  

Realization of 8-channel DMTD Measurement System

作　　者：张爱敏[1] 高小殉[1] 宁大愚[1] 王伟波[1] 苏志强 杜向伟 冯卫 Ai-min Xiao-xun Da-yu Wei-bo Zhi-qiang Xiang-wei 

机构地区：[1]中国计量科学研究院,北京,100013 [2]石家庄无线电四厂,河北,石家庄,050011

出　　处：《计量学报》2009年第6期-,共4页Acta Metrologica Sinica

摘　　要：基于双混频时差技术设计研制了8通道的频率稳定度测量系统,实现了对8路5 MHz或10 MHz频率标准的测量.当频率为10 MHz取样时间为1 s时,系统噪声本底优于2.0 X 10^(-13),取样时间为1000 s时,系统噪声本底优于2.5×10^(-16).不但可以满足原子时标基准原子钟组的内部比对,也可实现对一般频率标准的检定和校准. Abstract： Based on the technique of Dual Mixer Time Difference (DMTD), an 8-channel frequency stabilitymeasurement system has been developed. It realized the measurement of 8-channel 5 MHz and 10 MHz frequencystandards. For 10 MHz frequency, the noise floor is better than 2.0 ×10^(-13)/1 s, 2.5× 10^(-16)/1000 s. It can not only satisfy the internal comparison of time scale ensemble, but also can realize the calibration of normal frequency standards.

关 键 词：多通道 混频 时差 测量系统 Measurement System 系统噪声 取样时间 频率标准 TIME Difference calibration 频率稳定度 TIME scale comparison 原子时标 设计研制 本底 原子钟 better Mixer Based 

分 类 号：TB9-55[一般工业技术—计量学]