V.Yu. Muchkaev – Ph.D.(Eng), Associate Professor, 

Department «Electronic Instruments and system engineering», Yuri Gagarin State Technical University of Saratov E-mail: muchkaev_vadim@mail.ru

V.A. Senchurov – Ph.D.(Eng), Associate Professor, 

Department «Electronic Instruments and system engineering», Yuri Gagarin State Technical University of Saratov E-mail: senchurov_v86@mail.ru