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1·United States Frequency Standard?

美国标准频率 USFS?。

2·Calcium is one prospective element for the modern optical frequency standard.

钙原子是现代光学频率标准的一种很有前景的原子体系。

3·Phase comparison is a high precision comparing method for frequency standard.

比相法是一种高精度的频标比对方法。

4·Voltage controlled crystal oscillator (VCXO) plays an important roll in the atomic frequency standard.

压控晶体振荡器是原子频标的重要组成部分。

5·The performance of frequency calibrator is directly related to precision transfering frequency standard.

校频仪的性能，直接关系到传递频率标准的精度。

6·The Timing System could provide the 1PPS, 10PPS frequency standard and corresponding timing to user side.

本时间统一系统向用户端提供1PPS、10PPS两种时间信号及其各自对应的时间信息；

7·This uncertainty is one of the critical factors governing the accuracy level of the cesium fountain frequency standard.

此项频移误差是决定铯原子喷泉频标准确度总体水平的主要因素之一。

8·Waveform distortion of super low frequency standard shaker is an important factor which influences the calibration precision.

波形失真度是影响超低频振动计量校准精度的重要因素。

9·The main part of the platform is the production of arbitrary signal driVe source and high frequency standard signal driVe source.

诊断平台的主要部分是任意信号激励源和高频标准信号激励源的产生。

10·A programmable divider used in frequency synthesizer of Rb frequency standard is designed, and the improvement of programmable divider is introduced.

对铷频标中的频率合成器内的程序分频器进行了设计，并介绍了改进后的程序分频器。