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在生产、生活、科技领域里有各种技术标准,这就是产业、产品、计量等标准;在许多电子设备、电子仪器内部也有特殊的标准,这就是本文所要谈到的基准信号。要是基准信号偏离标准数值,无论怎样精确的设备仪器也会出现不小的误差,这就需要进行计量和修理。基准频率信号电磁波的频率是人们测量得最为精确的一个物理量(最高已不劣于10~(-15)数量级),它可以转换成许多精确测量的工具和手段。例如,高稳定频率源提供的时
There are various technical standards in the field of production, living and science and technology. This is the standard of industry, product and measurement. In many electronic devices and electronic instruments, there are special standards which are the reference signals to be discussed in this article. If the reference signal deviation from the standard value, no matter how precise equipment and equipment there will be no small error, which requires the measurement and repair. Frequency of the Reference Frequency Signal The frequency of the electromagnetic wave is one of the most accurately measured physical quantities (up to and including 10-15 (-15)) that can be converted into many accurate measurement tools and tools. For example, when a high stable frequency source is provided