frequency standard

Analysis on the Resonant Characteristic of Microwave Cavity in Rubidium Frequency Standard by Using the Method of Perturbation

用于铷频标频率综合器中的可变分频器铷原子频标中微波谐振腔加载特性的微扰法分析

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Analyses failures of XSR type of Rubidium atomic frequency standard used in our factory, and introduces the situation of particular overhaul in detail.

对我厂的频率标准XSR型铷原子频标发生的故障及具体检修情况作了较详细的分析和介绍。

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This paper mainly introduces a solution about the last frequency transition circuit of Rb atomy frequency standard, which is based on FPGA+ DDS technology.

对铷频标电路部分最终的频率变换级提出了一种基于FPGA+DDS的解决方案。

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Optical clock is the most promising atomic clock and its uncertainty will reach to 10? 1 8 theoretically, which could be the time and frequency standard of the next generation.

光钟是目前公认的最具有发展潜力的原子钟，理论上预期光钟的频率不确定度可达10-18，有望成为国际新一代时间频率基准。

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You can't take photographs if the light is bad. Performance Comparison of Frequency Standard Measurement Systems Based on Beat-Frequency Method

光线不足，就无法拍照.基于差拍的频标比对系统的性能比较

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Cs atomic fountain clock is the reappearance of "seconds" definition of time and frequency standard device, has the highest accuracy, as a reference clock calibration with other atomic clock, is a time and frequency system based.

Cs原子喷泉钟是目前复现秒定义时间频率基准装置，具有最高的准确度，作为基准钟标校其他原子钟，是一个国家时间频率系统的基础。

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Comparing with the iodine absorbing stabilized frequency standard laser national standard by the method of beat frequency, we found the frequency stability of this laser is 1 × 10-9 and it can work continuously over eight hours.

与国家计量测试研究院的碘吸收稳频标准激光器拍频，频率稳定度为1×10~（-9）。

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Application of Digital Frequency Modulation and Digital Servo in Rubidium Frequency Standard

数字调频及数字伺服在铷频标中的应用

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Developing the cesium beam frequency standard Cs-ⅲ is a very important subject.

铯原子束频率基准是一个重要的研制课题。

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The hydrogen maser is the most stable frequency standard generally available today for all but the shortest measuring times. For long measuring times of 10 4s or longer, its performance typically deteriorates due to frequency drift of high Q resonant cavity.

氢脉泽是至今为止除极短时间测量间隔之外最稳定的频率标准，对于104s或更长的测量时间间隔，它的性能由于高Q值谐振腔而引起频率漂移而变坏。

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In order to get rid of the dependence on other countries and establish self-governed time and frequency standard, the research on atomic frequency standard is imperative under the situation.

为了改变我国时间频率系统对国外的依赖，建立我国独立的时间频率基准，原子频率标准的研制势在必行。

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This system is composed by a temperature chamber, several switch groups, a PC computer, a high-resolution frequency meter, a frequency standard, a control system including a simulator and a controller, a human interface based on virtual instrument.

该开发系统由温控柜、多路开关组、PC机、高分辨率频率计、频率标准、控制系统、基于虚拟仪器的人机界面组成。

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As development of science and technology, the demand for high-precision time and frequency standard is increasing.

随着科技的进步，人们对高精度标准时间频率的需求越来越高。

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Microwave spectrum of optical system improvement of cesium beam frequency standard at Shanghai Observatory

上海天文台铯钟改进束光学系统后的微波谱

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Optical lattice clock based on neutral atoms with high accuracy is regarded as one of the candidate of next generation frequency standard, and is widely studied in recent years.

中性原子光晶格钟作为一种高精度原子钟，被视为下一代频率基准的候选研究对象，受到人们的广泛关注。

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Computer Simulation Study of Compact Hydrogen Frequency Standard Microwave Cavity

小型氢原子频标微波腔本征值问题的计算机仿真分析

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The Improvement of Physics Package and the Long-term Stability Measurement for Rb Frequency Standard

铷频标物理部分的改进与长期稳定度的测量

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The experiment of optical-microwave double-resonance in trapped mercury is the basis for the research of mercury ion microwave frequency standard.

囚禁汞离子的光微波双共振实验是开展汞离子微波频标的实验基础。

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Reliability Enhancement Test of the Space-borne Rubidium Atomic Frequency Standard

星载铷原子频标的可靠性强化试验

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This paper introduces and analyzes the GPS controlled frequency standard work principle, technical characteristics and the system function. Also, it discusses the application of GPS technology in time-frequency measure.

介绍和分析了GPS监控铷原子频率标准的工作原理、技术性能和系统功能，阐述了GPS技术在时频计量测试中的应用和优势。

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In the Rubidium frequency standard, It is necessary to generate a fractional frequency signal. So DDS ( direct digital synthesis) is optimal candidate.

在铷原子频标中，需要产生带有小数频率的微波信号，DDS（Direct digital synthesis）逐渐成为实现该频率的最佳手段。

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Dissemination of time and frequency standard of Shanghai Observatory

上海天文台时频标准的传播

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Analysis and Design of High-Order Microwave Multiplier for Rubidium Atomic Frequency Standard

铷原子频标微波高次倍频器的分析与设计

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We also describe the basic principle and realization of optical clock, and believe that optical frequency standard will become new generation time frequency reference.

详细描述了光钟的原理与系统构成，并对光学频率标准与光钟的应用前景进行了展望。

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Low Noise Frequency Conversion Technology and the Improvement on Rubidium Frequency Standard

低噪声频率变换技术及铷原子频标的改进

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Overhaul of XSR type of Rubidium atomic frequency standard

XSR型铷原子频标的检修

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Analysis for Resonant Characteristic of Microwave Cavity Loaded with Complex Structure Dielectric in Rubidium Frequency Standard

铷频标中复杂结构介质加载微波腔谐振特性的分析

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A Radio Frequency Multiplier for the Rubidium Vapor Cell Frequency Standard

一种铷原子频标射频倍频单元的实现

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A construction layout about flexible, convent, new type, multi parameter, high accuracy, large volume data acquisition system for the Rubidium atomic frequency standard test is put forward.

提出了一种用于铷原子频标实验的灵活、方便的新型多参数、高准确度、大容量数据采集系统的构成方案。

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The Circuit Design of Frequency Standard in Miniaturization Rubidium Atomic System

小型化铷原子频标电路设计

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