Title:  PAM4 Jitter, Noise, and BER Analysis

Date:  November 14, 2018

Time:  8am PT/ 11am ET

Presented By:   Ransom Stephens, Author, Technologist, and Physicist

Sponsored by:  Noisecom, Rohde & Schwarz USA, Signal Microwave

Abstract:

At data rates above 25 Gb/s, 4-level pulse amplitude modulation is replacing the convenient, logic- emulating signaling scheme called NRZ. By encoding two bits per symbol, PAM4 gives us bandwidth margin but complicates everything else. In this seminar we discuss techniques for analyzing the performance of PAM4 transmitters and receivers. After a brief review of the PAM4 scheme, we dive into jitter and noise analysis of three eye diagram PAM4 signals including the key transmitter diagnostic and compliance tests. We then turn to receiver tolerance testing for both diagnostics including techniques for generating stressed PAM4 signals and measuring both the symbol and bit error ratios.

Presenter Bio:

Ransom Stephens helps engineers advance to the highest data rates by teaching the concepts engineers need to design better systems, better serdes, and better ways to find problems and come up with solutions. Ransom started in basic research at labs in the US and Europe specializing in digging weak signals out of strong backgrounds. He brought those skills to high speed electronics in 1999 and invented new techniques for signal and noise analysis. Since 2005, when he started Ransom’s Notes, his seminars have helped thousands of EEs understand key nuances of their work. Ransom was named the 2017 Jim Williams ACE Contributor of the Year for content that advances engineering and design.He is also an accomplished book author: the novels The God Patent and The Sensory Deception both published by 47North, Amazon Publishing’s science fiction, fantasy, and horror imprint have each appeared on a variety of bestseller lists. His first full-length work of nonfiction popular science, The Left Brain Speaks the Right Brain Laughs, was published by Viva Editions in 2016. Ransom holds a Ph.D. in physics from the University of California.

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