ATE-BREO is a modular universal solution for the tasks of service, as well as production support and control of the parameters of radio-electronic units (LRU) for aviation equipment, as well as for naval and ground-based equipment. The ATE-BREO system consists of the following parts: • Base complex (BC) - rack with a set of measurement and stimulus modular instruments; • A set of test unit adapters (UA)– to connect the unit under test UUT to the BC. Each UA can be manufactured both for an individual LRU and for a group of functionally similar LRUs; • Software development and operating environment (SDOE) - The Informtest development and operating environment based on graphical user interface (GUI) allows to create test programs for variety of UUT and LRUs.. Fundamentally new technical and technological approaches allow to reduce the mass-dimensional characteristics of the system and the set of test unit adapters (UA), to shorten the testing time of the UUT and LRUs up to 10 times compare to traditional ATE systems of the previous generation, and to achieve fully automated tests that do not require operator intervention in the process.