FIELD: monitoring and diagnosing automatic-control systems and their components. SUBSTANCE: device used for checking first-order and second-order aperiodic parameters and oscillation parameter of sections has trigger circuit, single stepwise test action source, first and second nonlinear-function shaping units, first and second multiplying units, first and second integrating units, first and second dividing units, first through seventh amplifiers, switch, first through seventh adders, first, second, and third tolerance-check circuits. EFFECT: enlarged functional capabilities. 1 dwg
