DC25_PAPER_Track12_PerspectivesManagingIntraPairSkew_Kocsis.pdf

1、 Information Classification:General Perspectives on Managing Intra-Pair Skew in Copper Cable Assemblies for High-Volume Deployments Sam Kocsis,Amphenol Hari Thurairajaratnam,Microsoft Tahoura Mosavirik,WPI Mustafa Boyvat,Amphenol Information Classification:General Abstract The demand for high-qualit

2、y,high-performance passive copper interconnects has never been higher.Market pressures from Artificial Intelligence and Machine Learning(AI/ML)related deployments require interconnect solutions that can scale platform architectures while preserving link budgets,power consumption,and total cost of ow

3、nership.Passive copper interconnects,and specifically copper cable assemblies,are an attractive option but come with their own sets of challenges.Copper cabling takes up considerable size at the aggregate lane counts desired and requires careful routing within the data center rack builds.Bends and t

4、wists on copper cable assemblies create undesired stresses on the twin-ax causing performance variation and potential to degrade link performance.These stresses can be quantified with measurable characteristics of the cable segments such as insertion loss deviation,mode conversion,and intra-pair ske

5、w.When multiple segments are cascaded together in a link,its critically important to understand the interaction of the characteristics of the individual cable assemblies to accurately estimate the impact on the full link.This paper will focus on the characteristic attributes of intra-pair skew,inclu

6、ding root cause assessments,characterization of large data sets of high-volume production samples,and measurement-to-simulation model correlation.The paper will examine multiple ways to quantify and assess intra-pair skew of a cable assembly,in the frequency-domain and with a focus on high-volume pr