The accelerated development of 400G Ethernet technology is driving new requirements through the test community as it relates to measuring electrical PAM4 systems. This presentation will review PAM4 measurement methodologies and expand on emerging needs related to FFE reference equalization, clock recovery challenges, BER measurement needs as well as SNDR as it relates to multi-level signaling. An overview of the recent CEI and IEEE spec revisions will also be included.

Attendees will learn:

  • Learn the latest updates to CEI and IEEE specs
  • Gain insight on FFE reference equalization needs
  • Overcome challenges with clock recovery
  • Get an In-depth look at SNDR as it relates to multi-level signaling


John Calvin, Technology Solutions Manager, Tektronix

John Calvin is the product manager for the Tektronix performance instrument BERT portfolio. He is a senior member of IEEE and has spent many of this technical years at Tektronix, enabling high performance communications and consumer/enterprise data-com standards. John holds a Bachelor’s Degree in Electrical Engineering from Washington State University and holds 8 patents in measurement related technology. He is a recognized spec contributor to the fields of InfiniBand, Fibre-Channel, PCI Express, SATA and USB. Early in John’s career he led physical layer design efforts for ITU-T communications standards and has returned this and recent IEEE 802.3 efforts as an area of professional focus.