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An Instrument for Short-Period Frequency Comparisons of Great Accuracy

机译:高精度短期频率比较的工具

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摘要

The instrument is intended for use, in conjunction with an accurate chronometer, in short-period comparisons of the frequencies of high-grade 100-kc/s oscillators. The phases of the two inputs are compared in a discriminator, the output of which controls a trigger circuit. Pulses from the trigger control the starting and stopping of the chronometer, which measures the periods of beats between the signals. Comparisons of frequencies differing by about 1 part in 106 can be made to an accuracy of 1 part in 1011 over the period of a single beat, i.e. about 10 sec.
机译:该仪器旨在与精密天文钟配合使用,用于短期比较高级100 kc / s振荡器的频率。在鉴别器中比较两个输入的相位,鉴别器的输出控制触发电路。来自触发器的脉冲控制着计时器的启动和停止,该计时器测量信号之间的节拍周期。在单个拍子的周期内,即大约10秒内,可以比较频率差异为106分之一的频率,达到1011分之一的精度。

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