The block diagram of a radar subsystem for pulse-by-pulse random hopping tuning of the duration and carrier frequency of a probing pulse according to a random sequence presented. This system provides effective protection against radar deceptive jamming. Matlab/Simulink model of the proposed subsystem has been built. In this subsystem, the tuning sequence determined by hybrid random number generator. In turn, the hybrid random number generator consists of two different true random number generators and linear feedback shift register. Simulation data and diagrams of probing pulses were obtained.