一波形发生器，可以产生正弦波、方波、三角波，频率和幅值可调；按键选择输出波形；按键调节输出信号频率和电压幅值。其扩展功能：频率调节步进值为1Hz；电压幅值调节步进值为0.5V。-A waveform generator can generate a sine wave, square wave, triangle wave, frequency and amplitude can be adjusted　Key choice output waveform　Adjust output signal frequency and buttons voltage amplitude. Its function expansion: frequency adjust step value is 1 Hz　Voltage amplitude adjustment step value is 0.5 V.