Abstract: With the improvement of radar mobility，what involved in the radar servo subsystem is more and more complicated．It includes functions such as automatic leveling of antenna rotary platform，rotation and location of antenna，deployment and dismantling of antenna，azimuth angle conversion and information exchange with master computer integration of weak power and strong power，collection of digital signal and analog signal．Therefore，all factors should be considered and several measures should be taken to meet the requirements of electromagnetic compatibility and to ensure reliable operation of the radar system and its servo subsystem．