The standard frequency in television signals is a signal with high stability and accuracy, controlled by the atomic clock.
电视信号中的标准频率信号是受原子钟控制的高稳定度、高准确度的信号。
High precision quartz oscillators were used for the transmission of BPV standard frequency and time signals at Shanghai Observatory.
在上海天文台BPV标频和时间信号的发播工作中，使用了高精度石英晶体振荡器。
A simple standard frequency tunable method which can be used to measure frequency switching time under the rated frequency deviation is presented.
描述了一种能在额定频差下测量频率转换时间的简便方法——标频调偏法。
A simple standard frequency tunable method which can be used to measure frequency switching time under the rated frequency deviation is presented.
描述了一种能在额定频差下测量频率转换时间的简便方法——标频调偏法。
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