求翻译：我们从以上3.1和3.2两节的推导可以看出，整个信号解调部分的幅值特性可以看成是一个简单的常数。因为无论是光电转换部分还是模拟电路的信号调理部分，幅值特性都可以看成是一个简单的系数，这是因为我们待测的信号的频带范围只有几十Hz的范围，远远小于该部分电路的带宽，在我们有限宽的信号范围内，整个信号预处理部分的幅频特性就可以看成是一个常数。是什么意思？

We are 3.1 and 3.2 from the above derivation of two can be seen that the amplitude of the signal demodulation part of the feature can be seen as a simple constant. Because both the photoelectric conversion part or parts of analog signal conditioning circuit, the amplitude characteristics can be seen

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We 3.1 and 3.22 inferential reasonings may see from above, the entire signal demodulation part peak-to-peak value characteristic may regard as is a simple constant.Regardless of because is the photoelectricity transformation part or the analogous circuit signal recuperation part, the peak-to-peak va

We can be seen from the derivation sections 3.1 and 3.2 above, the whole part of signal demodulation amplitude characteristics can be seen as a simple constant. Because both photoelectric conversion part and in the analog signal conditioning circuits part amplitude characteristics can be seen as a s

We can be seen from the derivation sections 3.1 and 3.2 above, the whole part of signal demodulation amplitude characteristics can be seen as a simple constant. Because both photoelectric conversion part and in the analog signal conditioning circuits part amplitude characteristics can be seen as a s