Аннотация:The influence of the passive, semi-passive and active hindrances on the work for radar from X-range is discussed. The necessity of the using of hindrances compensation unit in a radar with the small-sized for APAA (active phased antenna array) is substantiated. For the previously produced new block of hindrances compensation based on horn antennas, a fiber-optic information transmission system is make. The research results of its work are given. The advantage of its using in the radar a comparison with the coaxial cable is shown.