Cybershaft OCXO 10MHz Quad Multi-Output Edition

Cybershaft OCXO 10MHz Quad Multi-Output Edition  

10MHz Master clock OP18A / OP19A Will released on 23 August 2020

• This is a master clock for high-end audio that is made by combining the technology and know-how of cybershaft. 
• Equipped with 4 outputs, it can be used for systems that require multiple 10MHz inputs such as single DAC system and HUB.
• A new OCXO Type 3 is installed by selecting a stable unit through long-term calibration.
• The next generation linear regulator LT3045 is equipped with an ultra-low noise and ultra-high PSRR secondary power circuit.
• It covers up to the amazing low phase noise -121dBc / Hz (@offset 1Hz OP21A) grade.  

Characteristic

• This product adopts a new OCXO Type 3, and selects and installs units with outstanding stability by long-term calibration.
• In addition to the OCXO unit, a robust case made up of 3M wide-band magnetic shielding sheets and heat-shielding boards has been added to maintain an environment where OCXO performance can be maximized.
• Equipped with 4 outputs that are convenient when multiple clock signals are required in a device configuration such as a single DAC or HUB. 50 ohm or 75 ohm impedance can be set for each system. (Utility model registered)
• The output GND potential can be connected to the GND of the main unit or isolated (isolated) for each channel. (Utility model application completed) It is possible to meticulously deal with the complicated GND processing of audio systems. 
• Since the clock output level can be switched between 1.6Vp-p and 3.0Vp-p with a switch, it can be used by connecting to almost all audio devices. (4 systems common switching type) 
• Equipped with an LED monitor that can control the OCXO unit temperature by operating the oven circuit normally.
• The power supply uses a custom-made large R-core transformer with minimal leakage flux, and a precision conductor “102 SSC” is used for the lead wires . Equipped with a linear power supply with a proven track record using SiC Schottky barrier diodes, large-capacity low ESR capacitors, and OSCON.
• In addition, the next generation linear regulator, ultra-low noise, ultra-high PSRR LT3045, is installed as a secondary power source. In order to operate LT3045 under the best conditions, it has a three-unit structure. The primary power supply supplied from the conventional power supply circuit is a two-stage circuit that thoroughly eliminates noise with the secondary power supply. 
• Possible to use an external DC power supply for future expansion. The external DC power is supplied to OCXO via the LT3045 secondary regulator circuit. It can operate with only an external DC power supply.
• The internal substrate uses a 70 μm thick copper foil substrate, which is twice the normal size. The internal layout, which has been repeatedly verified, is in the best condition.
• In addition to the aluminum material of 2mm thickness, the pure copper plate of 3mm thickness is fixed to the bottom of the chassis, and it has a solid damping structure of 5mm in total. In addition, we adopt aluminum die-casting three-point support feet that can stabilize any installation surface. 4mm screw can be replaced with optional spike insulator.
• Strictly measure characteristics using a highly calibrated measuring instrument. Plot phase noise and Allan variance for each unit to ensure clock quality.
• A two-year free repair warranty is included. 

Newly developed ultra-low noise and ultra-high PSRR linear power supply

Equipped with a three-unit circuit that maximizes the performance of the new-generation linear regulator LT3045A

dual-structure power circuit with an ultra-high PSRR LT3045 is added to the output of the conventional power circuit. It is designed to obtain the maximum PSRR by using three LT3045s in parallel to distribute the current.
In addition, when an external DC is used, DC via the LT3045 regulator is supplied to the circuit.

Output GND Insulation / case GND selection function

The GND potential of each output can be switched between “isolated from chassis GND” or “casing GND”. If the output GND of this unit is grounded in common, when multiple devices are connected, the GND potential difference of each device flows through the GND of the connection cable, which may cause noise called a GND loop. For this reason, it is usually better to isolate each output GND from noise. Depending on the system you are using, the ground of each device may be firmly grounded. If there is no GND potential difference between these devices, better results for noise may be obtained if the output GND is grounded to the chassis GND.

Since the environment of the audio system varies, you can choose the best method according to your environment. The bottom plate of the machine is equipped with a chassis GND terminal.

About external DC power supply

This unit is designed so that an external DC power supply can be connected. If the internal power switch of the main unit is turned off and the DC selector switch is switched to the external DC, it operates completely with the external DC power supply.

External DC specifications are 14V-16V 1A. The recommended voltage is 14V. The LT3045 can eliminate noise well even with a 1V difference between input and output voltages. The smaller the input / output voltage difference within the specifications, the better the LT3045's capabilities will be. Therefore, the primary power supply built into the main unit is set to 13.2V. In the case of an external power supply, this is the reason why 14V is recommended considering the voltage drop of 0.35V of the Schottky diode. However, the 14V external power supply standard is rare, so a 15V power supply can operate properly. Please supply DC with as little ripple noise as possible so as not to induce noise inside.

The external DC plug standard is 2.1mm / 5.5mm. A normal DC plug can also be used, but since a screw-in jack is used, the [RS product 487-820] plug is recommended.

About OCXO Type3

We adopted OCXO with the most suitable specifications for audio quality delivered by our orders from the world's top manufacturers. In addition, after in-house calibration for several months after delivery of new units, only individuals with very stable characteristics are selected and installed. (The manufacturer name and model number are not disclosed.)

OCXO characteristics selection value

The OCXO installed in this product uses a stable individual after several months of calibration of a new OCXO unit. In order to select optimally as a clock for audio, we comprehensively evaluate the phase noise characteristics and short-term stability (Alan dispersion) that can be further examined.
・ Selection reference value
phase noise: OP20A -120dBc / Hz or less at 1Hz offset -140dBc / Hz or less at 10Hz offset OP21A -121dBc / Hz or less at 1Hz offset -140dBc / Hz or less at 10Hz offset

Short-term stability (reference value)
OP20A TAU = 1sec 2.5E-13 or less (0.00025ppb / s)
OP21A TAU = 1sec 2.0E-13 or less (0.00020ppb / s)

The main criteria for grade selection at our company is the value of short-term stability of Alain dispersion. For example, even if the phase noise value is 1Hz offset and -121dBc / Hz or less, if the value of short-term stability Tau = 1sec does not meet the standard, it will not become OP21. This is the same as the previous OP grade selection method.

The above value is not a general catalog value (Typical) but a guaranteed value measured individually, so the product quality is constant. There is no so-called “outage”.

* For the value of phase noise offset 1Hz, an appropriate value between 1.000Hz and 1.099Hz is adopted to avoid averaging error. The measurement of phase noise is very sensitive and has measurement and measurement errors. The indicated phase noise value is not an absolute value but includes measurement error. The indicated phase noise value is a value measured under the same conditions of our company and is an index of product grade classification.

The value of the short-term stability of Alain variance is not clearly defined by international standards, so there may be large errors between calibration laboratories. The above selected values ​​are the values ​​for our calibration equipment.

・ Each OP grade product must be accompanied by an “Option Grade Certificate” with a hologram.

A tamper-proof seal is affixed in the center. A hologram is printed on the right edge. In addition, a hologram sheet with the serial number written on the option grade certificate is affixed to the OCXO unit.
Please be sure to check before purchasing a second-use.

How to use

Simply connect the 10MHz clock output on the back of this unit to the external 10MHz clock input of your audio device with a BNC cable. After that, change the settings on the audio device to use the external clock input. (Some devices switch automatically.)

Compatible audio products

"ESOTERIC Grandioso K1, P1x, P1, D1x, D1, K-01Xs, K-01X, K-01, K-03Xs, K-03X, K-03, K-05Xs, K-05X, K-05, K -07Xs, K-07X, K-07, D-02X, D-02, D-05X, D-07X, P-02, P-02X, N-01, N-05, G-0, G-0s , G-0Rb, G-02, G-03X, G-25U, TASCAM CG1000 / dCS Vivaldi clock, Paganini clock, Scarlatti Clock / MUTEC iCLOCK, MC-3 +, MC-3 + USB / Antelope Audio Isochrone OCX HD, OCX-V, OCX, TRINITY / BRAINSTORM DCD-8 / Phaseteck HD-7A / Phasemation HD-7A192 / SFORZATO DSP-01, DSP-Vera, DSP-Dorado, DST-01, DSP-03, DSP-05 / TEAC UD -503, UD-505, NT-503, NT-505 / SPEC RMP-X1 / Sound Warrior SWD-CL10 / TechDAS D-7, D7i / RATOC RAL-DSDHA2 / M2TECH EVO DAC TWO PLUS, HIFACE EVO TWO / CH Precision C1, D1 / aurender W20 / soulnote D-2 / SOtM sMS-200ultra, tX-USBultra, SOtM sNH-10G (both require master clock input function) / GUSTARD U16 / iFi Audio Pro iDSD "and
other 10MHz clock input Master clock generator, CDP, DDC, DAC, Audio H UB etc.
* If you are unsure of the specifications of the device you are using, please contact us with the model name from the “Contact Us” form.

Specifications

• Ultra low phase noise OCXO Type3 installed 10MHz oscillator
• accessory AC power cable, instruction manual, test report and phase noise / Allan dispersion characteristic graph 75 ohm terminal 3
• BNC cable is available as an option The Output: 10 MHz x 4 systems Sine wave output level: LOW 1.6 Vp-p HIGH 3.0 Vp-p (4 systems common switching 50 ohms)
• Output impedance: 50 ohms / 75 ohms Each system is a single switching output GND potential: body GND / insulation switchable in (each line individually switchable)
• Dimensions: W230mm x (including protrusions) D250mm x H95mm 
• Power: AC100V 50/60 Hz up to 30W normal 8W
• (optional in AC110V ~ 127 V Or 220V ~ 240V can be changed)
• External DC power supply: DC14V ~ 16V 1A
• external DC plug standard:
• 2.1mm / 5.5mm 　Screwable weight approx. 3.8Kg
• 2 years free repair guarantee 
• * Design and specifications are subject to change without notice for improvement The

Optional Accessories

Spike Insulator Order code: SPF-01, set of 3 ¥ 11,550 (including tax) The
mechanical diode structure blocks vibration from the ground plane.
It can be used by replacing the standard aluminum die cast insulator with a screw diameter of 4mm.

Since the spike and pedestal are integrated, there is no need to install and move the equipment.
At the time of shipment, a standard aluminum die-cast insulator is attached to the main unit, and this option is included to prevent damage to the tip. Easy to install.

Q & A