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GE11-M-31L1-S: VFAT10 Communication Issue

During the recommissioning on May 20-21, 2021 we saw the following evolution of issues:

  • GBTs locked on power up (no power cycle needed)
  • GBTs stable during GBT phase scan
  • VFAT10 and 20 were lost during DAC scan
  • Set GBT phases to 15 for VFAT 10 and 20 and took DAC scan without it
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