With its high efficiency, 50 Gbps/lane (50G for short) PAM4 has been chosen by IEEE 802. 3 as the encoding technology at the physical layer for 400GE, 200GE, and 50GE interfaces. Pulse amplitude modulation (PAM) is already a widely adopted technology in high-speed digital communications. But to understand why it has become ubiquitous in serial data standards, you first must understand the market forces driving the data networking industry. Figure 1-1 shows the typical waveform. AN 835: PAM4 Signaling Fundamentals - This application note explains PAM4 theory and its operation. 0 to Ensure Designs of High-speed Interfaces and Systems Allen, TX – August 3, 2021 – Anritsu Corporation President Hirokazu Hamada is pleased to announce that the PCI-SIG® has certified the company's PAM4 pulse.
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