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400G PAM4 Testing


400G PAM4 Testing


Optical Manufacturing Tests for 400G

The 8 Series Sampling Oscilloscope provides an efficient and effective solution for 400G optical manufacturing tests, design and verification of high-speed components and systems, and signal integrity analysis. It supports compliance testing for industry standards including: 25G, 50G, 100G, 200G, 400G IEEE 802.3 standards such as 400GBASE-FR8, 400GBASEDR4. Our software was built from the ground up to reduce the complexity associated with measurements like TDECQ.

Overcoming 400G measurement challenges

The rapid worldwide growth in cloud computing is driving massive demand for high-performance datacenter infrastructure. To keep pace with this relentless demand, developers are transitioning to 400G technologies enabling smaller, faster, lower cost-per-bit solutions.

There are several core technologies that are enabling 400G, including the use of higher order modulation and higher data rates up to 56 GBaud. This new modulation scheme provides four-level pulse amplitude modulation (PAM4), which transmits two bits per symbol, doubling the data rate compared to conventional NRZ.

PAM4 signals, having a lower signal-to-noise ratio and 1/3 of the amplitude of equivalent NRZ, require more advanced tools and features for successful validation.

Reference our configuration guide to find standard configurations, options, and other support for planning purposes. This guide will be updated as new configurations are created.