Two modulation technologies that enable 400GE, each with its own set of challenges.
Demands for a connected world with instant data access continue to drive data center transceiver innovation. 100 gigabit Ethernet (GE) data transmission is in production and will continue to evolve. But 100GE speeds aren’t fast enough to support the expected surge in connected devices and the applications they will run, opening the door for 400GE. Non-return-to-zero (NRZ) and four-level pulse amplitude modulation (PAM4) are two modulation technologies that enable 400GE. Each comes with its own set of challenges.
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