DCON26_SLIDES_Track03_OptimizingHostOutputTP1aEqualizationSignalTuningforLinearOpticalLinksin106112GbLinear_191_100.pdf

1、Welcome to ConferenceFebruary 2426,2026Santa Clara Convention CenterExpoFebruary 2526,2026 1Optimizing Host Output(TP1a)Equalization and Signal Tuning for Linear Optical Links in 106/112 Gb LPO SystemsHsinho Wu,(Altera)Mike Li(Altera),Masashi Shimanouchi(Altera)John DiCosola(Altera)2LPO System Benef

2、itsLPO systems reduce complexity and power by removing DSP,retimer,and CDR while ensuring Ethernet and SerDes compatibility.Signal Integrity ChallengesThe absence of advanced equalization&retime requires careful link design and testing,with TP1a test point critical before optical conversion.Standard

3、ized SpecificationsLPO systems follow OIF CEI-112G-LINEAR-PAM4 and LPO MSAs 100G-DR-LPO specifications for electrical and optical compliance and interoperability.System ArchitectureThe system includes host transmitter,PCB channel,LPO module,and optical fiber adopting CEI and 400GBASE-DR4 standards f

4、or DSP-free operation.Motivation and LPO System Overview3 This paper focuses on LPO TP1a compliance test and optimizationsBlock Diagram of Linear Optical Interconnect&Compliance Test Locations 4TP1TP1aTP2TP3TP4aTP4TP5dE/O DomainElectricalElectricalOpticalOpticalElectricalElectricalElectricalLink blo

5、ck diagram of Linear Optical InterconnectLPO system block diagram LPO TP1a measurement test methodology and configuration is similar to Ethernet/CEI chip-to-modulesLPO TP1a Topology and Measurement Configuration5LPO Host Module to Front-end Linear Optical Module Reference ChannelMeasurement Setup fo

6、r TP1a LPO TP1a Ref.RX is defined in:oCEI-112G-LINEA-PAM4oLPO MSA 100G-DR-LPO OIF&LPO MSA spec.differ(slightly)in:oHost channel IL(informative)oRef.RX CTLE step size(e.g.gDC)oRef.RX FFE tap length and tap coef.RangeoHost TX FFE tap length(informative?)LPO TP1a Reference Receiver Configurations6Host