Philips DVDR985 Technical Training Manual page 48

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DROPPI
The DROPPI (DVD Rewritable OPU Pre-
Processor IC) is a multi-purpose analog pre-
processor. It supports many photo detector con-
figurations and output signal modes. It produces
RF and servo feedback signals, Q1-Q6. Its out-
put signals are on the same flex ribbon cable
with the wideband RF (differential signals). The
Wobble, focus, and Sled Servo signals are rela-
tively low bandwidth.
46

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