Mauro Marchetti, CEO of Anteverta-mw, a Maury Microwave company, discusses the concepts of the various active load pull techniques and methodologies. Mauro then proceeds to discuss the motivations and importance of performing load pull using modulated signals, the impacts of wideband impedance control, and the architecture that enables this capability. Finally, he introduces the concepts and implementations of baseband impedance control and its impact on linearity.