AN 835: PAM4 Signaling Fundamentals

ID 683852
Date 3/12/2019
Public
Document Table of Contents

3. CEI-56G-MR-PAM4 Interface Details

This chapter details the electrical interface between nominal baud rates of 18 Gsym/s (36 Gbps) and 29 Gsym/s (58 Gbps) using PAM4 coding.

The signal trace or channel between a transmitter and a receiver must meet the Channel Operating Margin (COM) specification, a method and a threshold quantity used for channel compliance. The COM specification table is normative (mandatory). The insertion loss (IL) or return loss (RL) formulas or graphs are only informative (recommended).