AN 835: PAM4 Signaling Fundamentals

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

5. PAM4 Link Case Study

This section shows the result from a case study on the following two links:

  1. OIF_Stressed: Out of spec of CEI-OIF 56G MR spec
  2. OIF_Compliant: Within spec of CEI-OIF 56G MR spec
Table 13.  Channel Characteristics @ 14 GHz
Electrical Characteristics CEI-56G-MR-PAM4 Spec (dB) OIF_Stressed (dB) OIF_Compliant (dB)
Insertion Loss < 20.0 22.78 18.79
Return Loss > 7.5 ~14.5 ~13.5
Channel Operating Margin (COM) > 3.0 ~3 ~3.7

The link simulations were performed with the help of Intel’s Advanced Link Analyzer. The transmitter and the receiver are both Intel® Stratix® 10 E-Tile IBIS-AMI models. The package models are added on top because they are not part of the device model. Hence, you observe separate TX and RX package models in the following figures for link simulation results.