一种全面响应时间的频率稳定度测量
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摘要
为从本质上反映不同频率源的频率稳定度随响应时间的变化规律,提出了一种可以测量全面响应时间的频率稳定度的方法.该方法在数字环境下,应用数字边沿效应抑制量化误差,并结合数字双混频时差法测量信号间的相位差,通过相位差得到全面的频率稳定度指标.实验证明,该方法在自校的条件下,100ns的频率稳定度能够达到10~(-5),秒级稳定度能够达到10~(-12),一天的频率稳定度能够达到10~(-16).
To reveal the change of the frequency stability of a different frequency source with the response time in essence,a method of measuring the comprehensive response time of frequency stability is proposed.In the digital environment,the digital edge effect is used to inhibit the quantization error,combined with the digital double mixing time difference method to measure the phase difference between the signals,by which the comprehensive frequency stability index is obtained.In experiments,the frequency source realizes the frequency stability of a more comprehensive change rule over time.Experiment proves that the method under the condition of self-calibration,transient frequency stability can be 10~(-5)/100 ns,that short-term frequency stability can be 10~(12)/s,and that frequency stability for a long time can be 10~(16) a day.
To reveal the change of the frequency stability of a different frequency source with the response time in essence,a method of measuring the comprehensive response time of frequency stability is proposed.In the digital environment,the digital edge effect is used to inhibit the quantization error,combined with the digital double mixing time difference method to measure the phase difference between the signals,by which the comprehensive frequency stability index is obtained.In experiments,the frequency source realizes the frequency stability of a more comprehensive change rule over time.Experiment proves that the method under the condition of self-calibration,transient frequency stability can be 10~(-5)/100 ns,that short-term frequency stability can be 10~(12)/s,and that frequency stability for a long time can be 10~(16) a day.
引文
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[9]周翠.基于FPGA的高斯滤波器的快速实现[J].空军雷达学院学报,2011,2(3):186-188.ZHOU Cui.Fast Implementation of Gaussian Filter with FPGAs[J].Journal of Air Force Radar Academy,2011,2(3):186-188.
[2]ZANETTE D H.Frequency Stabilization by Synchronization of Duffing Oscillators[J].Europhysics Letters,2016,2(115):20009.(上接第75页)
[3]偶晓娟,周渭,易韦韦,等.精密频率测量边沿效应的特性分析[J].西安电子科技大学学报,2016,43(3):144-148.OU Xiaojuan,ZHOU Wei,YI Weiwei1,et al.Characteristic Analysis of the Border Effect in Precision Frequency Measurement[J].Journal of Xidian University,2016,43(3):144-148.
[4]PROCHAZKA I,PANEK P,KODETJ.Precise Phase and Frequency Comparator Based on Direct Phase-time Measurements[J].Review of Scientific Instruments,2014,85(12):126110.
[5]BRIDA G.High Resolution Frequency Stability Measurement System[J].Review of Scientific Instruments,2002,73(5):2171.
[6]BAI L N,SU X,ZHOU W,et al.On Precise Phase Difference Measurement Approach Using Border Stability of Detection Resolution[J].Review of Scientific Instruments,2015,86(1):015106.
[7]王正明,董绍武,刘春侠,等.NTSC的双混频时差测量系统试运转结果分析[J].时间频率学报,2006,29(2):134-141.WANG Zhengming,DONG Shaowu,LIU Chunxia,et al.Test Running and Data Analysis on the Dual Mixer Time Difference System at NTSC[J].Journal of Time and Frequeney,2006,29(2):134-141.
[8]赵科佳,张爱敏,徐清华,等.数字式双混频时差测量系统的试验研究[J].仪器仪表学报,2014,35(12):2858-2865.ZHAO Kejia,ZHANG Aimin,XU Qinghua,et al.Experimental Research on Digital DMTD Measurement System[J].Chinese Journal of Scientific Instrument,2014,35(12):2858-2865.
[9]周翠.基于FPGA的高斯滤波器的快速实现[J].空军雷达学院学报,2011,2(3):186-188.ZHOU Cui.Fast Implementation of Gaussian Filter with FPGAs[J].Journal of Air Force Radar Academy,2011,2(3):186-188.