This paper presents an approach to development of digital radar signal simulator based on low cost 16-bit RISC based microcontroller. Typical, mostly used, radar output signals are given and then signal-video relationships are explained in addition to requirements of tactical display calibration with respect to stages of combat management system deployment. Later, generation of radar output signal methodology is explained in detail in terms of utilization of hardware accelerators and peripherals within the microcontroller. Furthermore; the usage of signals and generated discrete radar signals are given as well as digital radar video which simulates radar video returns from target or terrain. Finally; practical results of testing and calibrating of tactical display with such a solution are discussed.