By changing the amplification multiple through DAC signals, the measurement range of the system is improved.

用DAC芯片程控信号调理电路的放大倍数，提高了系统的测量范围。

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Abstrat: This system is composed by FPGA, MCU controller, keyboard, LCD, DAC and amplifier modules.

本系统由FPGA、单片机控制模块、键盘、LCD液晶显示屏、DAC输出电路和末级放大电路构成。

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When the open-loop gain of servo system is determined, the selection of DAC resolution and gear ratio is restricted each other and should be paid much attention in the design of servo system.

由于DAC和齿轮减速比都影响着伺服系统的开环增益，当系统开环增益一定时，DAC位数的实际作用和减速比的选择相互限制，在设计雷达伺服系统中需注意。

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