The CAR arbitrary waveform generator 25 is a compact EMC testing system for creating sinusoidal disturbances on high voltage supply lines of vehicles as of ISO 7637-4:2020 test pulse A. The generated disturbance is coupled over the CAR-AN HV direct to have+ or HV- or over the coupling balun CAR-CNB1 to HV+ and HV- simultanly. The system strictly complies with the international standards and manufacturer standards that describe phenomena on the power supply lines of vehicles.