LinkX User Guide for 400G and 200G using 50G-PAM4 and 100G
Last updated on Apr 29, 2026.
Technical Guide NRZ&PAM4 Switching on the Electrical Port
Currently, optical modules such as 200GE LR4 and ER4 of HiSilicon Optoelectronics support PAM4/NRZ mode switching on the electrical port side to meet the requirements of different
PAM4 vs NRZ: Which is Better for 50G Transceivers
PAM4 and NRZ are two common modulation technologies. Learn the differences between PAM4 and NRZ, and their respective application scenarios in this article.
PAM4 vs. NRZ: Why PAM4 is the Core of 400G & 800G Ethernet
PAM4 technology is implemented in 100G Ethernet under the IEEE 802.3cd standard, serving as an upgrade to traditional NRZ modulation.
NRZ vs PAM4 Understanding the Key Differences
PAM4 vs NRZ: Compare data rates, noise tolerance, and efficiency to choose the best modulation for your network and data center upgrades.
PAM4 vs NRZ: Picking the Right PAM4 modulation Optical Transceiver
Learn how a PAM4 modulation optical transceiver compares to NRZ, plus real rack-level selection steps, pitfalls, and troubleshooting for data centers.
PAM4 vs NRZ in High-Speed Optical Networks
Analysis of why PAM4 and NRZ signaling create different optical behaviors, loss sensitivity, and infrastructure requirements in modern high-speed networks.
100G DSFP Modulation Explained: NRZ to PAM4 Evolution
Explore how PAM4 modulation enables 100G DSFP optics, why NRZ reached its limits, and how modern DSP-driven designs deliver high-density, scalable optical interconnects.
Technical Note
With a converter cable, it is possible to convert NRZ links to PAM4 and vice versa. The products include: PAM4 to 4x100G QSFP NRZ. The 400G cable breaks out from 1 x 400G (8x56G
Key Technologies
The dual protocol capability is available with the 100G-PAM4 series, but fragments for the older 50G-PAM4 and 25G-NRZ devices as some devices are InfiniBand- or Ethernet-specific.
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