能实现1Hz~50MHz间的频率测量，显示信号周期，能实现1Hz~15KHz间的信号波形实时显示，采样速率120KHz。-1Hz ~ 50MHz to achieve inter-frequency measurements show that the signal cycle, to achieve inter-1Hz ~ 15KHz real-time display of signal waveforms, the sampling rate of 120KHz.

使用win32 API函数产生20-5000Hz的正弦波声音.视窗中的卷动条移动频度为1Hz,翻页为一个八度音阶.-Using the win32 API function generator 20-5000Hz sine wave sounds. Window scrolling movement frequency for the article 1Hz, flip an octave.