General information about RTV radars, their characteristics and construction principles is given| considered ways to view the space and measure the coordinates of targets | the main technical characteristics and methods for constructing RTV radar transmitters are given. Particular attention is paid to the analysis of the influence and type of the probing signal on the protection of the radar from active and passive interference, the resolution and accuracy of measuring coordinates. Structural diagrams of the path for receiving and separating signals, methods for receiving and processing various types of radar signals against the background of interference are given | describes methods and devices for protecting RTV radar from active and passive interference, features of their technical implementation | the principles of constructing devices for displaying radar information and the operation of devices for generating scans of indicators and scale marks are outlined. air defense systems of the Air Force. It may be useful to students of the enlarged group of the direction of training of specialties 210000 "Electronic Engineering, Radio Engineering and Communications" (special 210304.65 "Radioelectronic Systems"), as well as to all those interested in the construction, development and current state of the RTV radar.