Considering the requirements for the flight inspection of instrument DME, a embedded signal acquisition module is designed. The ARM is chosen to control the whole system. The system contains corresponding hardware of A/D conversion, ARINC 429 bus interface, GPS Synchronous signal interface and LAN interface which used to communicate with PC, et al. And design the corresponding hardware interface driver based on embedded linux system, includes SPI bus driver, ARINC 429 bus driver and test applications, et al. This system finally realizes the measurement and analysis of the ground station DME. The component has a strong portability and it can be applied to other realtime measurement fields.