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1)  frequency and period measuring method
测频测周
1.
Based on the integration of frequency and period measuring method, this method utilizes software syntonization, two switch points and the lock gate period changed, and so it can to develop measurement accuracy and broad measurement range.
针对现有测频技术存在问题 ,提出一种新的测频方法 ,它是在测频测周的基础上 ,利用软件同步技术、测频测周双分界点及改变闸门时间的方法进行频率测量 ,从而大大提高准确度 ,扩大测量范
2)  synchronous multi-cycle frequency measurement
多周期同步测频
1.
It is illustrated in detail that with the use of synchronous multi-cycle frequency measurement as well as PC104 and CPLD, the measurement of target Doppler frequency is implemented.
文章提出了利用PC104和CPLD,采用多周期同步测频方法实现目标多普勒频率的测量。
3)  singal period synchronism
单周期同步测频
4)  sampling cycle of frequency measurement
测频采样周期
5)  multiple period synchronization frequency test
多周同步测频
6)  monitoring period and frequent
监测周期和频率
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