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RMees's avatar
RMees
Icon for New Contributor rankNew Contributor
7 years ago

SuperlightII word alignment fails on cable.

I have ported the SuperLightII example design on a Nallatech 385 board (ARIA 10 10AX115S2F45I2SGES). The IP works fine if I use a loopback device on the QSFP port. But when I connect two ports, ea...
Nathan_R_Intel's avatar
Nathan_R_Intel
Icon for Contributor rankContributor
7 years ago
It seems with the QSFP module, the signal is degraded that you cannot achieve word alignment. Suggest to try increasing your Transmitter Vod and Pre-emphasis Post Tap 1 value to check if you can get an error free transmission. Regards, Nathan