In this paper, a real time power spectrum analyzer of low frequency random signal based on digital filters is introduced, and a design method of real time arithmetic is given.

文中介绍了基于数字滤波的低频随机信号实时功率谱分析仪的实现方法，并给出了实时算法的设计要点。

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The principle of the circuit, the procedure of signal processing in each part of the circuit and the design of system software, in a intelligent digital level analyzer, have been presented in detail.

叙述了一种智能数字电平分析仪的电路原理、各部分电路的信号处理过程以及系统的软件设计，给出了实现本产品所需的主要元器件及它们的主要参数。

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