The 400G-FR4-LPO specification by the LPO (Linear Pluggable Optics) MSA defines a four-wavelength 100 Gb/s/lane, 53. 125 GBd, PAM4 optical interface using standard single-mode fiber with reach up to at least 500 m, and host-module electrical interfaces for hosts with DSP based SerDes and RS(544,514). AgilexTM 7 SoC FPGAs Enable 400G-DR4-LPO Optical Modules to Significantly Reduce Power, Cost, and Late floading for AI clusters and HPC in hyperscale cloud/data centers, storage, and networking infrastructure. Customers benefit from LPO technologies' lower power, lower cost, lower latency, and. Last year, module vendors demonstrated the first 1. 6T optical modules, and this year DSP vendors looked ahead to second-generation 1. 6T modules connect a 16x100G host interface to 8x200G optics (16:8), next-generation designs will work with forthcoming. What appears as a simple vendor substitution on a spreadsheet translates to PAM4 signal degradation, EEPROM mapping failures, and thermal throttling in production. The idea is simple: instead of a DSP (digital signal processor) inside the module – replacing it with transimpedance amplifier (TIA) and a driver chip with high linearity and EQ capability – LPO shifts signal processing into.