本程序是用于信号频谱分析的实验程序。 主要功能是进行信号的幅值谱计算；同时可完成在选定范围内谱峰的精确频率、幅值和相位计算（计算结果为cos相位）。-This procedure is used for signal spectrum analysis of experimental procedures. The main function is to calculate the amplitude spectrum of the signal precise frequency, am