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Extracted text from Accuphase DP 85 Brochure (Ocr-read)
Page 1
Integrated SACD/CD player with HS-Link. Ready for new-generation formats such as
2.8224 MHz/1 bit and 192 kHz/24 bits. Revolutionary MDS (Multiple Delta Sigma) con-
verter. Transport section with dedicated DSP for digital servo control and single lens/twin
pickup high-speed access mechanism. Entirely separate construction of transport and
processor sections, with HS-Link and coaxial transport output and digital inputs.
The Super Audio CD (SACD) is now the pinnacle
format of pure audio. Based on the expertise
gained with the separate type SACD/CD player
combo DP-100 and DC-101, Accuphase
developed the DP-85 using the latest advances
in digital technology. The result is an integrated
SACD/CD player of the highest quality. The
DP-85 lets you fully enjoy the amazing dynamic
range of SACD/CD sources. The superb sound
quality is sure to capture the heart of any
audiophile.
The transport section of the DP-85 features a
dedicated DSP for the digital servo circuitry and
a single lens/twin pickup high-speed mechanism
for totally accurate signal readout and almost
instantaneous access time. The processor
section is ready for the latest word in quality
such as 2.8224 MHz/1-bit and 192 kHz/24-bit
sources. The MDS (Multiple Delta Sigma) D/A
converter employs multiple strictly selected
delta sigma units in a parallel configuration,
assuring unprecedented conversion precision.
Although housed in one enclosure, the SACD/
CD transport section and the processor section
of the DP-85 can be used entirely independent
of each other, thanks to the HS-Link and coaxial
outputs and the digital inputs. Slots for option
boards are provided as well, resulting in
unsurpassed versatility for no-compromise
reproduction of music. The DP-85 represents
digital audio at its best, allowing the audio
connoisseur to rediscover what music is all
about.
Digital servo with dedicated DSP assures highly accurate signal pickup for SACD and CD
Plays also regular CDs with impressive quality
Single lens/twin pickup mechanism minimizes access time and SACD/
CD switching time
Compatible with super high quality digital audio interface HS-Link
developed by Accuphase; one RJ-45 HS-Link output connector built in
Dedicated coaxial connector for CD signal output
Text data display shows disc and title name, artist name, and other
information
Strong chassis with resonance and vibration resistant construction
"High Carbon" cast iron insulator feet with superior damping characteristics further enhance sound quality
Multi-function remote commander RC-28 supplied as standard equipment
The HS-Link output of the transport section can be used to combine the unit with a DC-330, DC-101, DG-28, etc.,
using dedicated HS-Link cable. With the DC-330 - DF-35 combination, a multi-amplified system entirely in the digital
domain can be constructed.
HS-Link is an ultra high-quality digital audio interface developed
by Accuphase using latest digital signal transmission technology.
It supports send/receive verification for copyright protection. The
LVDS (Low Voltage Differential Signaling) principle allows a single
dedicated HS-Link cable to transmit signals using advanced
formats such as 2.8224 MHz/1 bit or 192 kHz/24 bits. Conventional
digital formats are also supported. Because digital audio data
are transmitted with utmost fidelity, the sound quality achieved by
HS-Link is simply outstanding.
Digital
Audio
Signal
Digital
Audio
Signal TIA/EIA-568A CAT.5
STRAIGHT CABLE TIA/EIA-644
LVDS
Driver/Receiver
TIA/EIA-644
LVDS
Driver/Receiver
Security
Control HS-Link
Encoder
RJ-45
Connector
RJ-45
Connector Security
Control
HS-Link
Decoder
[
SACD/CD Transport Section]
Features and Functions
Connection examples for effective use of SACD/CD transport
New Generation Digital Interface HS-Link: High Speed Link
Assembly with transport outputs (HS-Link,
coaxial) and digital inputs (optical, coaxial)
DP-85 Block DiagramHS-Link Block Diagram
Sound field compensation with DG-28 connected to DC-330
Sound field compensation with DG-28 connected to DC-101
HS-Link cable
DIO2-DG1 installed in
EXT DSP slot (uses 2 slots)Coaxial digital
cable
Analog outputs
Analog preamplifier HS-Link cable
Coaxial digital
cable
Analog outputs
Power amplifier
DIO2-DG1 installed in
EXT DSP slot (uses 2 slots) DI2-HS1
installed
HS-Link cable
Multi-amplified system with DC-330 and DF-35 connected digitally
DI2-HS1
installedDO2-HS1 installed in
OUTPUTS slotHS-Link cable
For 5-way
configuration
and higher:
additional
DF-35
DI2-HS1 installedAnalog output
(2-way configuration)
Using the HS-Link, it is possible to keep the connection of DP-85 - DC-330 - DF-35
entirely in the digital domain until directly before the power amplifier. The various components
are connected with HS-Link cable.
Power amplifier
Power amplifier
Page 2
Supports new generation formats with high sampling rates such as 2.8224 MHz/1 bit and
192 kHz/24 bits
MDS type D/A converter achieves stunning performance and sound quality
D/A converter with printed circuit boards made from Teflon (glass fluorocarbon resin) with low dielectric
constant and low loss
(-½ Teflon is a registered trademark of DuPont USA.)
Ultra jitter-free PLL circuit topology
Fully separate processor section with coaxial and optical digital inputs
Ultra high-speed digital coupler ensures effective separation between digital and analog sections
Digital level control with an adjustment range of 0 dB to -60 dB
Balanced and unbalanced analog outputs
MDS (Multiple Delta Sigma) is a revolutionary design
which employs several delta sigma type converters
in a parallel configuration.
In the combined output of
these multiple converters,
conversion errors cancel
each other out, resulting in
a drastic improvement in
all relevant aspects of
converter performance: accuracy, S/N ratio, dynamic
range, linearity, THD, etc.
For the DP-85, this principle has been fur ther refined
by enhancing the current-to-voltage converter in the
signal adder section for even better stability and top-
notch performance.
DAC
#1
#2 S 1 e1 S2
e2
Sn-1
en-1 Sn
en
#n-1
#n
Digital input
S
0 (Signal)
e
0(Conversion
error)
MDS output Signal
Conversion error
Note the ratio between signal and
conversion error. In the MDS output,
the error is very small in relation to the
signal.
For the purpose of synchronizing operation of
the D/A converter with the digital audio interface
(DAI), a phase-locked loop (PLL) circuit is used
which generates a master clock to be used as
system reference. As shown in the diagram, the
Ultra Jitter-Free PLL Circuit of the DP-85
consists of a preamble detector and a voltage-
controlled oscillator (VCO) using a quartz
crystal element. The master clock produced by
this PLL circuit is totally free from the effects of
pulse distortion and jitter.
V C O
DAI input signal Preamble
detector
Phase
comparator
Frequency
dividerPreamble signal
(pulse distortion removed)
Loop filter
Master clock
output
The DP-85 uses six delta sigma converters in
parallel, which results in an overall performance
improvement by a factor of 2.45 (= -6).
[
Digital Processor Section]
Features and Functions
Ultra Jitter-Free PLL Circuit
Further Improved MDS Type D/A Converter
Assembly with HS-Link
encoder, master clock
generator, DAI encoder/
decoder, ultra jitter-
free PLL circuit,
and other
digital signal
processing
circuits
MDS type D/A converter principle Principle of ultra jitter-free PLL circuit
MDS D/A converter and analog outputs
assembly (with two Teflon PCBs for left
& right channels, featuring low dielectric
constant and low loss)
Supplied remote commander RC-28
Functions include input switching,
output level adjustment, direct play,
repeat, program, shuffle, etc.