引言数字瞬时频率测量(DIFM)装置因具有对单个射频脉冲进行瞬时测量的功能而被广泛用于电子战接收机。对于100毫微秒或更长时间的脉冲,侦听概率为100％。数字瞬时频率测量装置还能精确地测量载波频率。此装置可以用数字方式与系统计算机相联系,系统计算机使用频率数据帮助侦听、分析和识别存在于密集环境中的信号。数字瞬时频率测量装置以大于 Introduction Digital Instantaneous Frequency Measurement (DIFM) devices are widely used in electronic warfare receivers for their ability to make instantaneous measurements of a single radio frequency pulse. For pulses of 100 ns or longer, the probing probability is 100%. Digital instantaneous frequency measurement device can also accurately measure the carrier frequency. The device can be digitally linked to a system computer, which uses frequency data to help intercept, analyze and identify signals that exist in dense environments. Digital instantaneous frequency measurement device to be greater than