Bringup Lab Chronicles: A Measurement Two Years in the Making
Oxide Computer Company electrical engineers Ariane, Eric, and Tom detail the two-year effort to bring up a 100Gb backplane link, utilizing Teledyne LeCroy VNAs and TDRs to measure signal integrity. They explain how a missing 100Ω termination resistor on the clock line caused fatal jitter, a problem solved by adding an external resistor despite datasheet warnings. The team also built a custom probing station and used ANSYS simulations to model vias and impedance, ultimately achieving a link with zero forward error correction.