Different vias are used for mgt signals

sinara-hw / Sayma_AMC

AMC FPGA carrier board with FMC, dual SFP and RTM

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Closed marmeladapk closed 5 years ago

marmeladapk commented 5 years ago

E.g. for SFP1TX 01 03 vias are used and for ATX0 02 041 vias are used.

Which one should be used? Are they impedance controlled or is there no practical difference?

gkasprow commented 5 years ago

fixed. via impedance are as critical as trace impedance. This will be verified with Hyperlynx.