E-Tile Transceiver PHY User Guide

ID 683723
Date 4/01/2024
Document Table of Contents

3.1.3. PMA Tuning

The E-tile PMA supports various data rates and channel configurations to meet the most advanced PAM4 and NRZ protocols across a temperature range. The default adaptation sequence works at a static temperature regardless of the load.

For certain protocols, the adaptation sequence may not yield optimal performance over the temperature sweep. When temperature increases, the signal quality at the sampler degrades and the vertical and horizontal eye opening at the sampler degrade. To compensate for these degradations, RX analog front end (AFE) parameters and decision feedback equalization (DFE) must be positioned so that the adaptation results in an optimal performance with environmental changes.

PMA tuning methodology optimizes link performance to reduce the bit error rate (BER).