This tutorial is a collection of Examples for modeling electronic systems and signals. The description of each simulation example, in addition to the task for practical execution, contains a brief theoretical help on the relevant topic and modeling tasks in a virtual environment based on the MULTISIM, MATLAB, SIMULINK and MMANA GAL programs. It is recommended for use in the study of courses: "Theory of radio-technical circuits and signals," "General theory of radio-electronic systems," "Organization of radio-technical support of flights and aviation telecommunications," read for students of the faculty of AITOP, as well as the correspondence faculty of specialization "Organization of radio-technical support of aircraft flights." The materials of this manual can be useful for students of master's and postgraduate studies in the preparation of research papers and dissertations.