首先在直流通路中调节Rw使得ICQ=1.5mA。再连接好电路，用示波器观察输出波形（RL=5k）再将负载断开用示波器观察输出波形。高频实验资料。-First adjust the Rw in dc circuits makes the ICQ = 1.5 mA. Again good connection electric circuit, output waveform oscilloscope observation are used (RL = 5 k) then will load disconnect with the oscilloscope observation output waveform. High-frequency experimental data.