Besso is a comprehensive diagnostic tool for PCIe systems that helps visualize and troubleshoot the performance of PCIe retimers and links more effectively. It incorporates sophisticated features such as the EyeScope and BER monitors, allowing users to pinpoint and resolve issues remotely without disrupting high-speed interfaces. Designed for both laboratory and field use, Besso offers a user-friendly interface and extensive diagnostic capabilities including real-time visualization and logic analysis, making it an essential tool for any system requiring PCIe retimer technology.