{"title":"Stability of high quality quartz crystal oscillators: an update","authors":"M. Bloch, J. Ho, C. S. Stone, A. Syed, F. Walls","doi":"10.1109/FREQ.1989.68839","DOIUrl":null,"url":null,"abstract":"Two specially modified low-level, high-quality 5 MHz oscillators were tested for spectral purity and stability at the National Institute of Standards and Technology. Using a third, high-quality, prior-technology oscillator for triangulation the individual phase-noise power spectral density of one of the oscillators was determined to be S/sub phi /(f)=-133 dB+or-2 dB below 1 rad/sup 2//Hz at a Fourier frequency of 1 Hz, while for the second oscillator it was -125 dB+or-2 dB at 1 Hz. Such oscillators can exhibit parts-in-10/sup 14/ flicker floor stability in high-precision quartz frequency-source applications. Extensive details of measurement methodology are given.<<ETX>>","PeriodicalId":294361,"journal":{"name":"Proceedings of the 43rd Annual Symposium on Frequency Control","volume":"8 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"1989-05-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"22","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Proceedings of the 43rd Annual Symposium on Frequency Control","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/FREQ.1989.68839","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 22
Abstract
Two specially modified low-level, high-quality 5 MHz oscillators were tested for spectral purity and stability at the National Institute of Standards and Technology. Using a third, high-quality, prior-technology oscillator for triangulation the individual phase-noise power spectral density of one of the oscillators was determined to be S/sub phi /(f)=-133 dB+or-2 dB below 1 rad/sup 2//Hz at a Fourier frequency of 1 Hz, while for the second oscillator it was -125 dB+or-2 dB at 1 Hz. Such oscillators can exhibit parts-in-10/sup 14/ flicker floor stability in high-precision quartz frequency-source applications. Extensive details of measurement methodology are given.<>
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