低频数字式相位测试仪，本设计给出了以凌阳16位单片机Spce061A为核心的数字式相位测量的基本原理与实现方案。该系统由相位测量仪、数字式移相信号发生器和移相网络三个模块构成，分别由两块单片机独立地实现控制与显示功能。采用DDS技术生成两路正弦波信号，并通过改变存储器中数据读取的起始地址来实现数字移相的功能，用Ф-T变换技术来实现相位差的测量，使得测量分辨率精确到0.1º ，测得的频率与相位差值送入LCD进行显示，加入红外键盘以及语音播报的功能，使得系统具有智能化、人性化的特色。-Low-frequency digital phase tester, the design is given to SPCE061A Sunplus 16-bit single-chip microcomputer as the core of digital phase measurement and realization of the basic principles of the program. The system consists of phase-measuring instrument, digital shift believe that its generator and phase-shifting network of three modules, respectively, by two independent single-chip control and display functions. Using DDS technology to generate two sinusoidal signals, and by changing the data memory read start address to the realization of digital phase-shift function, with Ф-T transform technique to achieve the phase difference measurement, making accurate measurement resolution to 0.1 º , the measured frequency and phase difference value into the LCD display by adding infrared keyboard and voice broadcast function, the system has intelligent, user-friendly features.