以CVI为平台建立频谱分析仪，有两个图形控件，用来分别显示采集波形和频谱分析图形；两个数字控件，一个输入采样速率，一个显示信号频率；三个命令控件，一个启动数据采集命令程序，一个开始频谱分析，一个退出程序。-CVI as a platform to establish a spectrum analyzer, two graphical controls used to display the waveform acquisition and spectrum analysis graphics　two digital controls, an input sampling rate, and a display signal frequency　three command control, a start data acquisitioncommand program began, a spectrum analysis, an exit program.