用AD9834做的信号源。用nokia5110液晶显示，四个独立按键可设置频率，输出波形，及幅度增益。增益是通过DA控制AD603对AD9834的输出进行程控放大。界面效果好。程序模块化，方便移植，学习。-AD9834 to do with the signal source. With nokia5110 LCD, four buttons can be set independent of frequency, the output waveform, and amplitude gain. DA control AD603 gain is the output of the AD9834 programmable amplification. Interface effect. Program modular, easy to transplant, to learn.