Accuphase DC 300 Brochure

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Accuphase DC 300 Brochure

Extracted text from Accuphase DC 300 Brochure (Ocr-read)


Page 4

l. ‘
(Option model names given In brackets.)
.Digitél: ,r , ,
a Accepts digital output signals lrorn CD transports, digital
recordersMD and DAT
. ocrsuo main unit provides two coaxial and two Toslinir
optical inputs
ii Option boards can be mounted in the rear-panel slots for
BNC(D|»BNC1l, HPC optical cable (DI-5T1), and HPC
balanced cable lDlO-FROi)

, ”we; We: ,

MD, etc.)

w Optional digital input/output board iDlo-ocri provides
connectors for two additional digital recorders

r Optional AES/EEU standard digital input/output board
(DIO-PROt)

- Dedicated src provides AAA/ea kHz sampling trequency
conversion for recording

Arialé'gtl ill: to ,.
~ Supplied as standard equipment, a line input board
(A|~Ul) accepts all analog line-level inputs lrorn CD
players, tuners, analog tape recorders, laser disc line-level
audio output and the analog output ol DAT and MD players
.i Additional unbalanced (Al-U1) or balanced lAl-Btl input
boards possible

e eaves m; (we a

,Bhonoiplaybac . ,

. Optional analog disc input board lAl»ADi) allows playback
or analog records

.. To provide separate inputs lor MM and MC, two analog
disk boards can be installed

Analoglre‘cordingi' ‘ '. , 'i‘ #4»

w Optional line input/output board lAlO-Ut) allows record-
ing and playback with analog tape recorder or analog
connection of DAT, MD or similar

~ Optional unbalanced (AO-Ui) or balanced (AO-Btl output
boards provide dedicated high-quality signal lor analog
recording

Di] '7"in , . .
. Digital-to»digltal copying possible
- Digital-to»analog and analog-to»dlgital (AIO»U1I copying

possible
- independent Fiec Out selector allows recording and dub-

bing while listening to a different source

IEXAT‘D‘SPicb'fnhéiz-itorsr. '-l ' "i’ ‘ " 7
a Digital I/O connectors allow connection of external dlgital
graphic equalizer

, ”9363f ‘ .
.i Two sets ol unbalanced and balanced output connectors
ior power amplifier connection

The I ustratlon shows a connection example WI h option boads installed.

Option borad installation example [from left)

Line input board (AIVU1) (standard equipment)
Analog disc input board (AI-Am)

HPC optical input board (DIVST1) O t'
Line input/output board (AID 1) P ‘°"
Line output board (AO-Ut)

For connection to digital eoulpment,you can use 757mm coaxlal cable. Toslink optical riber
cabie, HPC optical liper cable or similar,

For analog input/output connectionsuse audio cable equipped with pnono plugs, and take
care not to mix up iert and right cnanneis.

CD transport or other digital

source component

Tuner, CD player or other
component with analog output

eicrm our

HPc col-cal libel cabfe

75c martial cable

lINE lN

For analog
recording only

point
our

Tape recorder or other analog
recording/playback component

DIGlTAL our

rosirnir optical libel cable

DAT, MD, etc,

Digital graphic equalizer

DAT, MD, etc.


DlElTAL our claim lN

claim lN

750 coaxial cable

759 coaxial cable

@959

Audio cable wnn plug

Balanced cable r
r
r
i

Power amp

,/
'11;


I
12%;

Speaker systems

Ultra Jitter-Free PLL Circuit

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 a system
reference. As shown in the diagram. the Ultra Jit-
ter—Free PLL Circuit of the DC-3OO consists of a
preamble detector and a voltage-controlled 05-

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Ultra Jitter-Free PLL Circuit

cillator (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,

High-Precision Sampling Frequency Converter
A sampling frequency conv
verter (SFC) is available to
transform the sampling fre—
quency of digital input sig-
nals to the desired value. In
the 00-300, the sampling
frequency is arithmetically

High-precision ch
converted to a higher value (up-conversion) and then
to the 48 kHz level | signal. The highly precise quartz
oscillator used for this conversion assures flawless
and virtually jitter-free performance.

ZO-Bit, B-Times Oversampling Digital Filter
Moving unwanted sampling frequency remnants
(also called aliasing components) far outside the au—

dible range is the task of an oversampling digital
filterl The NPC (Nihon Precision Circuit) digital fi|~
ter in the 00—300, cus~
tom manufactured for
Accuphase. offers
state-of-the-art charac-
teristics in all vital as-
pects, such as absence
of group delay, passband ripple, and attenuation,
approaching the theoretical performance limits.

20bit digital lilter

4-Pole Analog Filter With Hand-Selected Com-
ponents

To reduce noise in the upper frequency range and
achieve high S/N ratio, a 4-pole Butterworth de-
sign is used for analog filtering. The active iilter
allows optimizing of the cutoff point, to keep phase
shifts in the passband range at an absolute mini-
mum. Strict selection of all filter components as-
sures sonic purity and total musical accuracy.