说明：  双通示波器频谱测量的滤波器设计 经过待通过滤波器处理后的频率响应，以及滤波前后的信号的双通道谱测量的结果进行分析，检查滤波器后的信号是否满足用户的频率范围要求
(Design of Filter for Spectrum Measurement of Dual Oscilloscope After the filter to be processed by the frequency response, and the signal before and after filtering the results of dual-channel spectrum measurement to check the signal after the filter to meet the user s frequency range requirements)