M as te r Clo c k Ge ne r ato r
G -02
Master clock generator equipped with high precision crystal oscillator
Digital audio synchronized to one high precision master clock
New support for 10 MHz and 22.5792 MHz master clock outputs
Talk of the flawless sound produced by an audio system connected together with a high precision master clock has been circulating between high-end
audiophiles in various forms. The three dimensional effect of the sound stage gives the listener an actual feel of, say, the high ceiling of a concert hall in
addition to the width and depth of original performance. The listener is treated to a pure and focused image of the playback sound that gives a sense of
reality as if one could reach out and touch it. When the final note of the musical instrument fades away, you almost perceive the gradual silence like the
color of a dark veil. This is truly an ultimate achievement of audio playback that “conveys music” so close to the original sound it leaves an unforgettable
impression on the listener.
With the aim of enhancing the true potential of ESOTERIC digital players, the clock generator “G Series” was redesigned as a new generation of devices
with improved functionality, power and flexibility.
G-02 uses a high precision oven-controlled crystal oscillator (OCXO) that provides optimal stability as an audio clock. This next generation clock generator
can output a master clock of 10 MHz and 22.5792 MHz, perfect for controlling both audio and computer based devices.
Master Clock Generator
Master clock generator
Every digital audio device operates with an internal clock circuit
generating the clock signals required to operate that device. The
master clock generator is an extremely stable oscillator that supplies
external clocks to digital devices (such as a transport, D/A convertor,
Super Audio CD player) equipped with clock input terminals. The
master clock generator supplies clock signals with a higher degree of
purity than clocks generated internally by digital devices and thus it
vastly improves the sound quality. By operating connected devices
off the same, highly stable master clock, timing errors called jitter
are virtually eliminated vastly improving imaging and dimensionality
while darkening the background.
Ultrahigh precision OCXO installed as the heart of the unit
The master clock generator
uses a high precision crystal
oscillator with a frequency
precision of +/-0.01 ppm (parts
per million) that is provided with
custom tuning designed
specifically for ESOTERIC. G-02
has a built-in, oven-controlled
crystal oscillator (OCXO) that
generates stable oscillation
under varying conditions. This is made possible by assembling a
quartz crystal resonator and oscillation circuit in an oven that
maintains the internal crystal and critical circuitry at a constant
temperature. G-02 achieves a very high frequency stability of +/-0.01
ppm under external temperature conditions of –20 °C to 70°C.
Newly-designed discrete clock output driver
circuit configuration
G-02 has adopted a newly-designed discrete clock output driver
circuit configuration. The discrete circuit uses a high-speed transistor
that is optimal for generating digital waveforms for which ultrafast
speed and a high degree of accuracy are required. Combined with a
heavy-duty power supply, this discrete circuit contributes to major
improvement of the sound quality by providing an accurate, stable
timing signal to audio devices.
G - 02
Heavy-duty power supply unit
The master clock generator is equipped with a heavy-duty power
supply unit that fully supports its high level of performance. A large
R-core transformer featuring low loss magnetic flux leakage has
been selected for the G-02. A series of several capacitors and
Schottky barrier diodes are used as a smoothing circuit for quick
response to support fast digital processing, contributing to the
generation of highly accurate clock signals. For the display, an
independent power transformer and a dedicated power supply circuit
have been installed for each circuit block to minimize mutual
interference between blocks.
Support for 10 MHz clock and 22.5792 MHz master clock outputs
G-02 can output a 10 MHz clock and 22.5792 and 24.576 MHz
master clocks that are compatible with ESOTERIC’ s original “Direct
Master Clock Link.”
Superb chassis construction for optimal performance
Since the oscillator is generally susceptible to vibrations, chassis
construction has been designed with utmost care. G-02 has a
highly-rigid thick aluminum chassis that minimizes the small
vibrations that could affect clock precision.
Esthetic rounded form
Thick aluminum material is used for the front, side and top panels, as
well as the front corners. The G-02 chassis design has inherited the
tradition of the ESOTERIC product line of a separate type digital
player with screw-less rounded top and corners. The appearance of
G-02 is in perfect harmony with ESOTERIC digital players.
Three separate A/B/C output systems
G-02 can output 100 kHz and 10 MHz in addition to clock signals of 1x,
2x, 4x, and 512x multiples (22.5792 MHz/24.576 MHz) of the base
frequency (44.1 kHz or 48 kHz). Moreover, in frequency expansion
(EXP) mode, G-02 can output 8x, 16x, 32x, 64x, 128x, and 256x
multiples of the clock frequency that enables it to supply clock signals
to a wide range of devices, including professional equipment.
Each of these systems has two output ports supplying clock signals to
a maximum of six devices. The output frequency can be set
individually for each of the six ports from A1 to C2. If a single device
is connected, all output ports other than the A1 port can be turned off.
External 10 MHz input port
G-02 is equipped with an input port that is capable of receiving a 10
MHz reference signal from an external device. This port can be
connected to devices such as the Rubidium clock and GPS clock to
further upgrade the system.
ESOTERIC’s original gold-plated BNC ports
G-02 uses ESOTERIC’ s original BNC ports that provide highly reliable
contact. These durable and secure ports can handle even heavy and
thick high-end cables.
Fig.1
Clock
SACD/CD Player
Master Clock Generator
Fig.2
SACD/CD Transport
Clock
Digital Audio
Master Clock Generator
D/A Converter
Clock
Specifications
Clock outputs 44.1 kHz setting 44.1/88.2 /176.4 / 352.8 / 705.6 kHz, 1.4112 /2.8224 /5.6448 /11.2896 /22.5792MHz 48kHz setting 48/ 96 /192 / 384 / 768kHz, 1.536 / 3.072 /6.144 /12.288 /24.576MHz Both settings 100kHz/10MHz Connectors BNC coaxial
Output level 1Rectangular wave (TTL level / 75Ω) Frequency stability Within ±0.01ppm(-20°C to +70°C) Frequency precision Within ±0.01ppm (when shipped new) Output clock stabilization (approximate time in minutes) Until oscillator
stabilizes after power turned on:15 / PLL locking time:1 Standard frequency input Input frequency 10 MHz(within ±10ppm) Connector BNC coaxial Input levels Sine wave: 0.5 –1.0 Vrms/50Ω, Square wave:1.5 – 3.0Vpp/50Ω General Power
supply AC 230V, 50Hz /AC120 V, 60Hz /AC 220V, 60Hz Power consumption 14 W(while warming up) /10 W(when stable) Dimensions (W × H × D, including protrusions) 445mm x 106.5mm x 360mm (17 1/2" x 4 2/8" x 14 1/ 8") Weight 10.2kg (22.49
lb.) Included accessories Power cord x 1, Warranty card x 1, Owner’s manual x 1
P R O U D LY M A D E I N T O K Y O
Please note that Esoteric products are available at authorized distributors in respective countries.
" ESOTERIC " is a trademark of TEAC Corporation, registered in the U.S. and other countries. "Super Audio CD" is a registered trademark.
©2012 TEAC Corporation. All Rights Reserved. All text, images, graphics and other materials on this catalogue are subject to the copyright and other intellectual
property rights of TEAC Corporation. These materials shall not directly or indirectly be published, reproduced, modified or distributed in any medium.
Design and specifications are subject to change without notice.
ESOTERIC COMPANY
1-47 Ochiai, Tama-shi, Tokyo 206-8530, Japan
Fax: (042)356-9240
www.esoteric.jp http://esoteric.teac.com/
PRINTED IN JAPAN 0412O05•TECD - 0153