Effective return loss, a new metric for SerDes channel or package characterization
What is effective return loss?
ERL is defined as “a figure of merit for the electromagnetic wave reflection from a device or a channel input or output.” This document explains why this metric is being introduced and adopted and how ERL is computed. It also explains how HyperLynx® uses effective return loss, in addition to the traditional return loss (RL) and associated limit, for 50GBASE-KR and 50GBASE-CR channel characterization and compliance.
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