Pedestal maps for SVX3D channels connected to silicon sensor strips with normal analog to digital conversion (a), and real-time pedestal subtraction (b). The solid line with error bars is for a channel to which a laser pulse was applied in every sample. The gradual rise with sample number is due to a slow variation of the laser intensity. The dashed line is for a channel without a laser pulse. Un-shielded digital signals were run over the bare sensor to introduce high environment noise. The vertical lines separate the different phases of dead-timeless operation. The zero bin in figure (b) corresponds to the PRD2 signal, which would normally be applied in an abort gap.