Design Innovation - Rega Jupiter CD Player Owner's Manual

jupiter manual.qxd 28/05/2002 10:29

Design Innovation

The Jupiter is the old Jupiter And Io in a single case. It is housed in
the new Rega custom built extruded aluminium case and includes the
heat sink base assembly to give added stability to the mechanical
parts. It uses the same basic circuit topology as the existing Jupiter
And Io but with improvements in the DAC, power supply & clocking
stages. The Jupiter has additional sonic improvements, to give a
higher level of performance over that of the planet. The Jupiter also
has the new lid assembly.
Digital to analog converter
The dual differential Digital to Analog converter is based around two
custom built IC40 DAC chips with separate DAC's for the left and
right channels. DC servo control has been used in the post DAC
amplifier and filter stages thereby keeping the capacitors in the signal
path to a minimum.
Power supply
The power supply is made up from 7 separate power supply's feeding
the mechanism, PLL, DAC digital & analog sections, micro controller,
display, analogue amplifier and filter.
All the stages for the clock PLL and in the signal path are double
regulated. There are two physically separate raw supplies for the
noisy stages (motor drivers etc) and for the clean stages (DAC, clock
& DSP etc). The Jupiter has a generously rated toroidal transformer
with separate windings for the two raw power supplies.
3
Page 6
Data Regeneration process
The signal from the mechanism is processed by a data regeneration
stage, where the data, Bit Clock & Word Clock are re-aligned and
then fed to the Rega IC40 DAC's for conversion.
Clock
The Jupiter uses a high stability oscillator module for the main clock.
The Master clock feeding the CD mechanism and DSP is derived
from a PLL clock stage for added stability.
Mechanism
The Jupiter uses a high performance CDM145BL-5BD25 kit with an
improved display and a better level of user functionality.
Rega has developed an 'intelligent' auto locating puck system and
has incorporated this high performance HMSS (High Mass Stainless
Steel) puck into the top loading design of the Jupiter.
4