三、放大器如将信号电压直接加于示波管的两块偏转板上,则荧光屏上所显现波形的畸变可减少到最低限度.但由于受到示波管偏转灵敏度的限制,对信号电压幅度值的大小就有一定的要求.如信号过小,会使波形观察不清;如信号过大,也会使观察很困难.因此,在信号电压加于偏转板之前,必须预先经过能对各种信号电压幅度进行调节的,且产生畸变极小的衰减器和放大器,使加于偏转板上的信号电压值恰能符合各种示 Third, the amplifier, such as the signal voltage is directly added to the two deflection plates of the oscilloscope tube, the waveform distortion on the screen can be reduced to a minimum.But due to the sensitivity of the oscilloscope deflection limit, the signal voltage amplitude value If the signal is too small, the waveform will not be observed clearly; if the signal is too large, it will make the observation very difficult. Therefore, before the signal voltage is applied to the deflector, Signal voltage amplitude adjustment, and produce minimal distortion of the attenuator and amplifier, so that the deflection voltage applied to the board voltage signal exactly in line with a variety of shows