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Andrew Zonenberg

Quick handheld probe measurement off the QSGMII TX line from the FPGA.

Definitely some logic bugs, we're supposed to have K28.1 in lane 0 and all I'm seeing is K28.5.

The eye (measured at the PHY side of the coupling capacitor) is pretty wide open, but I will definitely want to tweak driver settings given the closure in the right half. Need to check this against the QSGMII eye mask but I don't have the specs for that in ngscopeclient yet (also a job for tomorrow).

ngscopeclient screenshot showing 8B/10B data stream and 5 Gbps eye pattern
Jul 28, 2023, 06:51 AM·Public·Web
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