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讨论了高速数据采集系统前置通道的性能指标及设计原则，给出了作者设计且已实现的前置通道的系统构成及各个环节的结构，说明了其设计计算方法，特别详细说明了如信号幅度的调整，偏置量的调整与输入耦合及放大、触发等问题。文中讨论了ＡＤＣ的输入范围、输出显示垂直灵敏度、输入信号幅度值范围、衰减档的设置及放大倍数等之间的关系，给出了具体设计参数，同时还说明了计算机自动设定衰减档的方法。在解决偏置电平的调整问题上，文中提出了把高频与低频通路分开、在低频通道上调整偏置量的方法，给出了理论推导及具体实现电路。文章还对所设计的放大、触发电路做了描述说明。
The performance index and design principle of the front channel in high-speed data acquisition system are discussed. The system structure and structure of the front channel designed and implemented by the author are given. The design and calculation method is described. In particular, Amplitude adjustment, offset adjustment and input coupling and amplification, triggering and other issues. The article discusses the ADC input range, the output shows the vertical sensitivity, the input signal amplitude range, the attenuation file settings and magnification, the relationship between the specific design parameters are given, but also shows the computer automatically set the attenuation file method. In order to solve the adjustment problem of bias level, a method to separate the high frequency and low frequency path and adjust the offset amount in the low frequency path is proposed in this paper, and the theoretical derivation and the concrete implementation circuit are given. The article also describes the design of the amplification, trigger circuit description.