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【简答题】
输出信号幅度变化量是否超过 dB:在输入信号不变的情况下, Rp1调至大概中间位置,用示波器观测输出波形,假设峰峰值为2V,调节Rp1分别顺时针和逆时针调到底,再观测输出波形峰峰值最大是否超过2.6V或低于1.4V(峰峰值变化±0.3倍),如果超出这个范围,即可认为输出信号幅度变化量是否超过 dB。
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