设计中引入自动增益控制(agc)方法，在满足输出信号幅度相对稳定的情况下，调整总放大倍数在10 000倍范围内变化。

The introduction of Automatic Gain Control (AGC) method can adjust the total magnification at the range of 10 000 when the output signal amplitude is relatively stable.

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本文提出了一种利用大动态范围脉冲幅度自动增益控制技术和数字波形存储技术，实现水下目标信号存储和目标回波波形模拟的方法。

A method for acoustic signal storage and simulation of underwater target is presented in this paper. The techniques of large dynamic pulse gain control and digital waveform storage are applied.

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