Actuality of the solving of task of providing of the simultaneous and compatible func-tioning of different radio engineering, electronic and electrical engineering equipment – decision of task of electromagnetic compatibility of technical objects is considered in the paper. It is stated that testing technical objects on electromagnetic compatibility allows promoting the degree of their firmness to the obstacles. Influence of exactness of measuring of parameters of technical objects is grounded at tests on electromagnetic compatibility. The method of an estimation of the exactness of measuring parameters is offered, which can be used for creation of the computer-controlled measuring systems for the solving of tasks of electromagnetic compatibility.