如果不采取措施将叠加到信号上的串模噪声减到最小，串模噪声会对测量产生严重的影响。

Normal mode noise can seriously affect measurements unless steps are taken to minimize the amount added to the desired signal.

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这个相加的电压主要为电源频率的信号，其对于电压表读数的影响决定于电压表的串模抑制能力。

This added voltage is mainly power line frequency and its effect on the voltmeter reading will depend upon the normal-mode rejection capability of the meter.

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如图1 - 5所示，串模噪声是叠加到希望的输入信号上的误差信号。

Normal mode noise is detected as a peak noise or deviation in a DC signal.

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如图1 - 5所示，串模噪声是叠加到希望的输入信号上的误差信号。

Normal mode noise is detected as a peak noise or deviation in a DC signal.

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