3/13/2023 0 Comments 56g vs 112g serdes![]() ![]() For systems like high speed backplanes that need to transfer large amounts of data between system components, PAM-4 and similar signaling standards will be more important, especially once more GPU-based and PCIe 5-based components are incorporated into aerospace and defense electronics systems. Other protocols like lower speed Ethernet and other IEEE standards use some variant of PAM with a different number of signal levels. ![]() 56G, 112G, and higher channel speeds for Ethernet links.Today, you can find PAM-4 being used in some of the following areas: PAM has been used traditionally in Ethernet, but now it is being used in high speed digital components and computer peripherals to increase data rates beyond what is practical with existing differential signaling protocols. While modulation is nothing new, one newer technique that is gaining attention and being adopted in new components is PAM-4, or 4-level pulse-amplitude modulation. Since then, modulation has been applied throughout the telecom and networking worlds to increase data transfer rates over the air, over copper, and over fiber. The first AM radio signal was transmitted in 1901 by the Canadian engineer Reginald Fessenden. ![]() As technology advances, component designers, interconnect designers, and telecom designers have figured out unique ways to increase data rates in digital systems.
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