Direct PC bus access data acquisition system provides the required sampling rate and resolution to meet IEC 61000-4-7 measurement requirements and supports high-speed data transfers.  PC-based Harmonic and Flicker test software provides real-time full-color data display updates and continuous PASS/FAIL monitoring.  Automatic calculation of the maximum permissible system impedance Zsys, using the Zref and measured Flicker parameters, as required per EN/IEC 61000-3-11.  Intuitive operating software provides IEC test setup, data analysis, display, with test reports in and MS Word format.