Active Time Domain (ATD) testing of Active Optic Cables (AOC) requires a high degree of accuracy and repeatability in order to ensure reliable and error-free transmission of data as well as AOC interoperability across different providers’ network equipment. This application note demonstrates proven techniques and steps required to conduct accurate ATD testing of AOCs. It includes the latest procedures and methodologies to produce the valid stressed signal conditions required for accurate ATD compliance testing of AOCs. The reader will gain a comprehensive understanding of an IBTA-compliant ATD test system.