Post upgrade the CDS Overview was showing an issue with h1iopomc0's timing card. On further investigation we found that this timing card is a very early rollout of the V5 firmware, upgraded back in Feb 2025 for DT-frequency changes. The actual issue is that RCG5.65 is more accurately calculating the duotone crossing for h1omc0's low-noise ADCs. This value was +0.1uS pre-upgrade and now is -5.625uS with only nano-second variation. The CDS overview was using the DT crossing time as an indicator of timing card firmware version. V3 had DTs between +7uS and +8uS, V5's are in the -1uS to +1uS range.

I've changed the CDS Overview to extend the lower limit of acceptible DT timings to -6uS. No further action is required.