Esoteric G-01 Rubidium Master Clock Generator Master Clock Generators

Esoteric G-01 Rubidium Master Clock Generator

  • Product Code: G-01
  • £16,000.00

Master clock generator

Every digital audio device operates with an internal circuit generating the clock signals, or heartbeat, required to operate that device. This master 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 and stability than clocks generated internally by digital devices and vastly improves the sound quality. By operating connected devices off the same highly stable master clock, timing errors called jitter are virtually eliminated greatly improving imaging and dimensionality while darkening the background.

Ultrahigh precision rubidium oscillator installed as the heart of the unit

An American-made rubidium oscillator with a frequency precision of ±0.05ppb=±0.00005 ppm is used as the core of this extraordinarily accurate timing device. This oven-controlled oscillator significantly improves the performance of the clock generator. This oscillator module has been manufactured to ESOTERIC’s demanding specifications with sound quality and stability being given top priority. The sound quality one would expect from our best model in the master clock generator series has been achieved.

Newly-designed discrete clock output driver circuit configuration

G-01 has adopted a newly-designed discrete clock output driver circuit configuration. The circuit uses an ultra 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 circuit contributes to major improvements in sound quality by providing an accurate, stable timing signal to audio devices.

Power section with sufficient capacity

The G-01 clock generator has a powerful power supply section that supports its basic performance. Three power supply circuit boards, a total of 15 power supply regulators, and independent power supplies for each circuit block have been installed to minimize mutual interference between circuit blocks and to supply clean energy to all parts. A large toroidal transformer, which enables highly efficient and high power actuation, is used as the main component in the power supply which is essential to the sound quality. An EI core transformer is used in the display section.

A series of multiple capacitors are used for a ripple filter circuit and Schottky barrier diodes are used for quick response supporting fast digital processing which assists the accuracy of the clock’s signal generation.

10MHz clock and 22.5792MHz master clock outputs

G-01 can output a 10 MHz clock (sine wave or square wave) as well as 22.5792 and 24.576 MHz master clocks that are compatible with ESOTERIC’s original “Direct Master Clock Link.”

Three separate output systems

G-01 can output 100 kHz and 10 MHz (sine wave) 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) from three separate A/B/C output sections. Moreover, in frequency expansion mode (EXP), G-01 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 audio or video 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. This feature has been added to avoid deterioration of sound quality occurring through unnecessary inter-component interference.

10 MHz sine wave clock outputs

A 10 MHz square wave clock can be output from any of the output terminals of A, B, and C. In addition, two systems are designed specifically for devices equipped with 10 MHz sine wave requirements.

External 10 MHz/1pps input A 10 MHz or 1 pps reference signal can also be input externally by connecting an ultra high precision external clock. In addition to the input reference signal mode, the new “Rubidium + external input” mode is also available.

When a GPS receiver is connected to an external input terminal and the “Rubidium + external input” mode is selected, the internal rubidium oscillator is synchronized with higher center frequency precision, and allows more stable clock signal output from rubidium oscillator than the crystal controlled oscillator built into the external GPS receiver, which makes the most of advantages of a high precision GPS system.

ESOTERIC’s original gold-plated BNC ports

G-01 uses ESOTERIC’s original BNC ports that provide highly reliable contact. These durable and secure ports can handle even the heaviest and thickest high-end cables.

Superb chassis construction for optimal performance

Since the oscillator is generally susceptible to vibrations, chassis construction has been designed with the utmost care. G-01 has an extraordinarily thick and highly-rigid aluminum chassis that minimizes the small vibrations that could affect clock precision.

Digital - Master Clocks
Clock Outputs @ 44.1 kHz Setting 44.4, 88.2, 176.4, 352.8, 705.6 kHz. 1.4112, 2.8224, 11.2896, 22.5792 MHz.
Clock Outputs @ 48 kHz Setting 48, 96, 192, 384, 768 kHz. 1.536, 3.072, 6.144, 12.228, 24.576 MHz.
Clock Output @ Both Settings 100 kHz. 10MHz.
Outputs BNC
Output Levels Rectanglular Wave : TTL Level/75 Ω
Output Frequency Stability Within +/-0.1 ppb (-20C to + 65C)
Output Frequency Precision Within +/- 0.05 ppb (when shipped new)
Inputs BNC
Input Frequency Rb+EXT1pps mode - 1 pps signal (GPS Precision or better), Rb+ EXT10M mode - 10 MHz (GPS Precision or better), EXT -10M-IN mode - 10MHz (Within +/- 10 ppm)
Input Levels 10 MHz - Sine wave 0.5-1.0 Vrms/50Ω, Square wave 1.5-3.0 Vpp/50 Ω. 1 pps signal - Positive Pulse: TTL Level 100 kΩ
Power Consumption 85 W (while warming up) 28 W (when Stable)
Dimensions (W x H x D) 445mm x 131mm x 360mm
Weight - Unit 13 KG

2 Year Warranty - Terms & Conditions Apply

At Audio Destination we use various delivery methods to suit various needs from standard Royal Mail services (1st Class,Recorded or Special Delivery) to a fully insured courier service (one we have used for many years) depending on size,weight and cost of item.

Postage costs will show at checkout.

One thing customers can rely upon is Audio Destination will do whatever we can to get the item you have purchased to you as quickly as possible but again we will inform you if there are likely to be any delays.

Should any problems arise or any special request need to be catered for then please call us on 01884 243584 (and ask for Mike or Caroline) or leave a message in the comments section when ordering and this way we can make your experience of ordering from Audio Destination as enjoyable as possible.

Master clock generator

Every digital audio device operates with an internal circuit generating the clock signals, or heartbeat, required to operate that device. This master 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 and stability than clocks generated internally by digital devices and vastly improves the sound quality. By operating connected devices off the same highly stable master clock, timing errors called jitter are virtually eliminated greatly improving imaging and dimensionality while darkening the background.

Ultrahigh precision rubidium oscillator installed as the heart of the unit

An American-made rubidium oscillator with a frequency precision of ±0.05ppb=±0.00005 ppm is used as the core of this extraordinarily accurate timing device. This oven-controlled oscillator significantly improves the performance of the clock generator. This oscillator module has been manufactured to ESOTERIC’s demanding specifications with sound quality and stability being given top priority. The sound quality one would expect from our best model in the master clock generator series has been achieved.

Newly-designed discrete clock output driver circuit configuration

G-01 has adopted a newly-designed discrete clock output driver circuit configuration. The circuit uses an ultra 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 circuit contributes to major improvements in sound quality by providing an accurate, stable timing signal to audio devices.

Power section with sufficient capacity

The G-01 clock generator has a powerful power supply section that supports its basic performance. Three power supply circuit boards, a total of 15 power supply regulators, and independent power supplies for each circuit block have been installed to minimize mutual interference between circuit blocks and to supply clean energy to all parts. A large toroidal transformer, which enables highly efficient and high power actuation, is used as the main component in the power supply which is essential to the sound quality. An EI core transformer is used in the display section.

A series of multiple capacitors are used for a ripple filter circuit and Schottky barrier diodes are used for quick response supporting fast digital processing which assists the accuracy of the clock’s signal generation.

10MHz clock and 22.5792MHz master clock outputs

G-01 can output a 10 MHz clock (sine wave or square wave) as well as 22.5792 and 24.576 MHz master clocks that are compatible with ESOTERIC’s original “Direct Master Clock Link.”

Three separate output systems

G-01 can output 100 kHz and 10 MHz (sine wave) 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) from three separate A/B/C output sections. Moreover, in frequency expansion mode (EXP), G-01 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 audio or video 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. This feature has been added to avoid deterioration of sound quality occurring through unnecessary inter-component interference.

10 MHz sine wave clock outputs

A 10 MHz square wave clock can be output from any of the output terminals of A, B, and C. In addition, two systems are designed specifically for devices equipped with 10 MHz sine wave requirements.

External 10 MHz/1pps input A 10 MHz or 1 pps reference signal can also be input externally by connecting an ultra high precision external clock. In addition to the input reference signal mode, the new “Rubidium + external input” mode is also available.

When a GPS receiver is connected to an external input terminal and the “Rubidium + external input” mode is selected, the internal rubidium oscillator is synchronized with higher center frequency precision, and allows more stable clock signal output from rubidium oscillator than the crystal controlled oscillator built into the external GPS receiver, which makes the most of advantages of a high precision GPS system.

ESOTERIC’s original gold-plated BNC ports

G-01 uses ESOTERIC’s original BNC ports that provide highly reliable contact. These durable and secure ports can handle even the heaviest and thickest high-end cables.

Superb chassis construction for optimal performance

Since the oscillator is generally susceptible to vibrations, chassis construction has been designed with the utmost care. G-01 has an extraordinarily thick and highly-rigid aluminum chassis that minimizes the small vibrations that could affect clock precision.

Digital - Master Clocks
Clock Outputs @ 44.1 kHz Setting 44.4, 88.2, 176.4, 352.8, 705.6 kHz. 1.4112, 2.8224, 11.2896, 22.5792 MHz.
Clock Outputs @ 48 kHz Setting 48, 96, 192, 384, 768 kHz. 1.536, 3.072, 6.144, 12.228, 24.576 MHz.
Clock Output @ Both Settings 100 kHz. 10MHz.
Outputs BNC
Output Levels Rectanglular Wave : TTL Level/75 Ω
Output Frequency Stability Within +/-0.1 ppb (-20C to + 65C)
Output Frequency Precision Within +/- 0.05 ppb (when shipped new)
Inputs BNC
Input Frequency Rb+EXT1pps mode - 1 pps signal (GPS Precision or better), Rb+ EXT10M mode - 10 MHz (GPS Precision or better), EXT -10M-IN mode - 10MHz (Within +/- 10 ppm)
Input Levels 10 MHz - Sine wave 0.5-1.0 Vrms/50Ω, Square wave 1.5-3.0 Vpp/50 Ω. 1 pps signal - Positive Pulse: TTL Level 100 kΩ
Power Consumption 85 W (while warming up) 28 W (when Stable)
Dimensions (W x H x D) 445mm x 131mm x 360mm
Weight - Unit 13 KG

2 Year Warranty - Terms & Conditions Apply

At Audio Destination we use various delivery methods to suit various needs from standard Royal Mail services (1st Class,Recorded or Special Delivery) to a fully insured courier service (one we have used for many years) depending on size,weight and cost of item.

Postage costs will show at checkout.

One thing customers can rely upon is Audio Destination will do whatever we can to get the item you have purchased to you as quickly as possible but again we will inform you if there are likely to be any delays.

Should any problems arise or any special request need to be catered for then please call us on 01884 243584 (and ask for Mike or Caroline) or leave a message in the comments section when ordering and this way we can make your experience of ordering from Audio Destination as enjoyable as possible.

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