What is SI Test? Why DAC Cables Need SI Testing?
What is SI Test? SI (Signal Integrity) test is a set of measurements and analyses performed to ensure that electrical signals propagate through interconnects (cables, PCBs, connectors) with minimal distortion, maintaining their timing, voltage levels, and waveform shapes. Key Objectives of SI Testing: 1. Waveform Preservation - Ensure signals don't distort excessively 2. Timing Accuracy - Prevent excessive delay or jitter 3. Noise Control - Minimize crosstalk, reflections, EMI 4. Eye Diagram Compliance - Meet industry standards (like IEEE, USB, PCIe) 5. Bit Error Rate (BER) Validation - Ensure reliable data transmission Common SI Test Measurements: S-parameters (Frequency domain characterization) Eye Diagram Analysis Time Domain Reflectometry (TDR) Insertion Loss/Return Loss Crosstalk (NEXT/FEXT) Jitter Analysis (TJ, RJ, DJ) Impedance Profile Why DAC Cables Need SI Testing? DAC (Direct Attach Copper) cables ...