instantaneous frequency measurement meaning in English

瞬时测频法

General specification for instantaneous frequency measurement receiver
瞬时测频接收机模块通用规范
In this paper , a mixed method with the combination of advantages of analog and digital is discussed . it consists of two parts , analog and digital . first capacitance is converted to frequency by analog part , which makes the relations between capacitance and frequency , then high accuracy and instantaneous frequency measurement is accomplished by digital part based on the multiple period synchronization method
随着数字电路的成熟,也有数字方法。本文结合模拟和数字方法两者的优点,采用模/数混合方法。该方法由模拟和数字电路两部分组成,首先由模拟电路建立电容到频率的函数对应关系;然后由数字电路对频率计数。