Crosstalk measurement, extraction and validation in 10Gbps serial systems

A system based on the Molex SEARAY connector and IBM BladeCenter backplane was examined. A new and broadly applicable methodology was demonstrated to measure connector crosstalk using both frequency domain and time domain instruments.

After applying adjustments, the time domain and frequency domain results correlated very well. This validated the connector model data and demonstrated that system level simulations could be done with a high degree of confidence to determine the impact of connector crosstalk. It is clear from the simulation results that careful assignment of connector pins is critical because, victim lines surrounded by two near end aggressors could significantly reduce channel margin at 10Gbit/s.

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