One obvious phenomenon is that the first row with Baochao also to silver equivalent calculation, then simply straight spindle unit of measurement of po.
一个明显的现象是，最初行用宝钞时还以折合银锭计算，后来索性径直用锭为单位来衡量宝钞。
On the research of traditional phase noise measurement methods, a new phase processing and phase noise measurement method based on Equivalent phase Comparison Frequency is proposed in this paper.
本论文在对传统相位噪声测量方法研究的基础上，提出了基于等效鉴相频率的相位处理和相位噪声的测量。
The differences of principle and precision between frequency measurement method, cycle measure method, and equivalent precision frequency measurement method are compared.
分析、比较了测频率法、测周期法、等精度测频法等几种常用测频方法的原理及误差。
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