The method of clock calibration in VLBI spectrum observation is described in this paper.
本文给出在VLBI谱线测量中钟校准的方法。
This paper introduces the method of clock calibration to VCXO in system, based on GPS and CPLD. It can solve the problem of frequency offset because of Crystal worse behavior in Long-term use.
本文还给出了基于GPS芯片和CPLD，对系统压控晶振时钟进行校准的实现方法，有效解决了由于长时间使用，晶振自身特性变化，造成的频率偏移现象。
When the satellite geometry is good, the rubidium clock is used to improve vertical accuracy, and in turn, the calibration accuracy of the barometer.
当卫星几何位置好的情况下，铷钟用于改善垂直精度，顺便还较正气压计的精度。
The whole circuit consists of Sample and Hold Circuit, the Multiplicative A/D Converter, the Sub-ADC, the Digital Calibration Circuit, the Clock Generator and the Time Synchronizer.
流水线ADC的模块有采样保持电路、乘法数模转换器、子ADC、数字校正电路、时钟产生电路和时间对齐电路。
The whole circuit consists of Sample and Hold Circuit, the Multiplicative A/D Converter, the Sub-ADC, the Digital Calibration Circuit, the Clock Generator and the Time Synchronizer.
流水线ADC的模块有采样保持电路、乘法数模转换器、子ADC、数字校正电路、时钟产生电路和时间对齐电路。
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