The Run IIa CDF Silicon Upgrade has recently finished
installation.  The detector uses revision D of the SVX3 readout IC.  This
final revision incorporated new features in order to improve the potential
of dead-timeless operation.  This paper describes measurements of
dead-timeless effects on silicon strip readout on the test bench.  This
paper also describes tests of the dynamic pedestal subtraction circuitry,
which is shown to improve greatly the dead-timeless performance of the
silicon systems.