当信号源电压输入是2v时,调节可调电阻5k,满足显示的电压vpp2.04v,vMax为1.02v,波形稳定为正弦波,当输入信号的电压调节到200mv时 ,显示的vpp为172mv vMax为84mv 波形不稳定。参考信号是vpp为1v 频率为1000hz的正弦波 ,怎样调节才能使200mv时 显示的vpp为200左右 vMax 为100mv左右 在2v时也能满足vpp为2v左右 vMax为1v左右。 噪声源满足要求,均方根为1v。

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