SNLA433 august   2023 DS320PR1601 , DS320PR410 , DS320PR810 , SN75LVPE5412 , SN75LVPE5421

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1Introduction
  5. 2Device Overview
    1. 2.1 Receiver Equalization
    2. 2.2 Redriver Linearity
    3. 2.3 PCIe Links with Linear Redrivers
    4. 2.4 Redriver EQ Tuning
      1. 2.4.1 Detailed Description of Parameters Calibration
  6. 3General Guidelines for Optimal CTLE and Gain Selection
  7. 4Summary
  8. 5References

4 Summary

PCIe Gen 5 redrivers require tuning to be successfully integrated into a new system. Care must be taken in creating a test setup and a method of evaluating the receiver performance, but there are established guidelines, hardware, and utilities for these processes. Once testing is underway, most applications can be successfully tuned by adjusting only the EQ Index until the results are satisfactory and PCIe-compliant. The data provided in this document can assist in choosing both the placement of the redriver within the overall loss profile and starting CTLE settings to begin testing from, shortening the time and effort needed. Once tuning is complete, PCIe Gen 5 redrivers can fulfill their intended role as a simple method of extending the reach and maintaining the quality of PCIe links.