This work is carried out in the laboratory of radio receiving and transmitting devices .. The purpose of the work is to study the shape and spectrum of signals with amplitude modulation. Methodological guidelines contain the main theoretical information about the structure of the AM spectrum and UBP signals , Principles of construction and schematics of balance modulators , Brief description of laboratory equipment , tasks for laboratory work and guidelines for their implementation , as well as control questions and a list of cited literature. Methodical instructions for laboratory work "Amplith modulation research" compiled in accordance with the program of the course "Basics of radio electronics" for students of the 3rd year of the Faculty of Radiophysics, studying in the areas of training 03. 03. 03 Radiophysics, 02. 03. 02 "Fundamental Informatics and Information Technologies", 10. 05. 02 "Information Security of Telecommunication Systems" .