... frequency-shift stability ==> 移频稳定度 frequency shift system ==> 移频系统 frequency-shift telegraphy ==> 移频电报 ...
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相对于一般的通信系统而言，低轨卫星通信系统具有信号动态范围大，多普勒频移大且变化速度快，信道起伏剧烈等特点。
LEO satellite communication system has the properties of larger power dynamic range, larger and faster changed doppler frequency shift and rapid fluctuation compared to ordinary communication system.
系统采用移频键控（FSK）调制方式，对轴温数字信号进行处理并发射，上传给便携式模拟接车系统。
The system adopts FSK modulation way to carry out directly digital signal of axle tempratureand transmit to the receiving system of test train.
详细介绍NIM4铯喷泉钟系统频移及其不确定度的最新评定方法和结果。
This paper introduces the frequency deviations of NIM4 Cesium fountain clock , the method and result of a new evaluation.
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