DisplayPort: Compliance and Signal Integrity Debugging

Application Note Overview 

DisplayPort continues to support higher resolutions and data rates, robust compliance testing is critical to ensure interoperability across devices and interconnects. This application note provides a structured overview of physical layer testing for DisplayPort transmitters and passive cables, aligned with VESA CTS v2.1. It covers key measurement techniques using Rohde & Schwarz solutions, including oscilloscope-based testing at defined test points, automated workflows with ScopeSuite, and signal integrity analysis through equalization and jitter decomposition. The note also addresses cable characterization using mixed-mode S-parameters on a vector network analyzer, along with TDR-based impedance checks and simulated eye diagram analysis.