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.