If the AC voltage at the input is large, part of this signal is rectified, producing an error in the DC signal being measured.
如果输入端的交流电压很大，其一部分信号被整流，于是在被测的直流信号中产生了误差。
The electrical signal is amplified electronically, with an increase in signal power occurring at the expense of the input AC power to the amplifier.
电信号被用电子的方法放大，即利用输入放大器的交流电能将信号的功率放大。
To calibrate the circuit, first disconnect or obscure the input photodiode so that A1A converts no ac signal.
为校准电路，首先断开或使输入光敏二极管变暗，以便A 1 A转换非交流信号。
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