Digital signal processor (DSP) was adopted to design portable rotating air blower fault diagnosis instrument, and the system hardware structure and the software designing ideas were expounded.

The structure and function of Digital Signal Processor (DSP) and the application of DSP on UPFC experimentation device are presented in this paper.

This paper introduces the software and hardware structure, display of digital course and the testing method of compass parameter of gyrocompass course signal digital processing system.