These 2D maps show the average number of digis for each module in the 4 Pixel barrel layers, normalized to the ZeroBias trigger rate. Each bin represents a Read Out Chip (ROC): there are 16 ROCs per each module. Dark blue bins indicate that a ROC is not taking data. In this example, a large portion turned off for all 4 layers up to LS 9. This area is partly recovered in LS 10 and fully recovered after LS 11.