The Design And Research Automatic Test System Based On DDS Function Generator

With the rapid development of science and technology and the increasing number of requests of the electronic testing tasks, the test content were more and more complex as the workload increased dramatically. Higher requirements were put forward on the measurement precision, measurement range and reliability of test equipments. The traditional manual testing with low efficiency could not satisfy the requirement of design gradually. So was borne the automatic testing technology which has already got a good development in the areas of production and research.In this paper the design of DDS function generator composed of the S3C44B0X ARM processor and FPGA was described. With the equipment of RIGOLE DS1052E oscilloscope the automatic test system were built to test an existing amplification board in lab. Both DDS function generator and oscilloscope were equipped with USB interface, so this system was designed on the basis of the universal serial bus, USB. The software in the automatic test system was developed in Lab windows/CVI environment. And the function of information interaction between control machine and instruments was realized by the VISA function library.This paper firstly introduced the research background, development situation of automatic test system and DDS function generator and the main content of design. Then the construction of automatic test system was expounded in which the hardware and software design of each part of the system were emphatically introduced. In the ending section, a conclusion was made on the design of the whole system in which the problems and matters need attention in the debugging process were given and the solving methods were put forward.While running the automatic test procedures, the system could complete the entire testing tasks under the control of the automatic test program without any human interventions which would finally meet the design requirement of the automatic test system.