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文件名: Comparison of Adaptive and Non-adaptive Equalization Methods in High-performance Backplanes

It has been shown that there are significant variations in backplane interconnect over environmental variations. The question remains: how to best set equalization coefficients where both high performance and low cost are required? Three different methods are discussed in detail: table-based lookup, adapt once on power-up, and continuous live-adaptation. The merits and difficulties of implementing each method in high-speed serial links are discussed. Measured silicon and system results for the methods are shown for a FR-4 ATCA backplane. Measured data including temperature and humidity variations and their effects on system margins are shown for data rates from 3 to 6Gb/s

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