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.
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。
The circuit shown in Figure 25 is the heart of an average reading, rms calibrated AC voltmeter.
图25是一个平均值输出，有效值刻度的交流电压表头放大电路。
The circuit shown in Figure 25 is the heart of an average reading, rms calibrated AC voltmeter.
图25是一个平均值输出，有效值刻度的交流电压表头放大电路。
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