TEAC CG-10M Master Clock Generator

TEAC CG-10M Master Clock Generator

主时钟发生器

CG-10M

Precision pulses breathe new life into Digital Audio. An all-new Master Clock Generator for the Hi-Res era.

精密脉冲把生命带到数字音频中呼吸。 一种全新的高精度时钟发生器。

The CG-10M is a master clock generator that delivers an extremely accurate clock signal to allow Digital-to-analogueue converters (DACs) to perform at their ultimate best.

CG-10M是主时钟发生器，提供准确的时钟信号，在高标准下进行D/A转换。

It is a well-known fact among audiophiles that the clock signal is the foundation for all digital signal processing. For example, digital signals, such as PCM, are divided extremely finely into tens of thousands of parts per second along the time axis. If that fundamental time axis fluctuates during the process of D/A conversion it is much more difficult to render an analogue audio waveform that is identical to the original. This is all the more true with DSD audio signals that function at MHz speeds in the time axis. For this reason, having as accurate a clock signal as possible is very important for the re-creation of digital audio signals, particularly HiRes files that use ultra high sampling-rates, such as DSD 22.5MHz or PCM 768kHz.
At the heart of the master clock generator is a crystal oscillator, encased in in a temperature- controlled box, the "oven", to maintain the best and stable performance under an ideal temperature condition for crystal oscillation. This oven-controlled crystal oscillator (OCXO, for short) generates an extremely accurate 10MHz clock signal which is within ±3 ppb of frequency temperature characteristics and within ±0.1 ppm of frequency precision. The elegant analogue gauge on the front panel gives a visual indication of the status of the internal crystal oscillator at all times.

The CG-10M is a master clock generator that brings out the best performance from USB DACs, network players, CD players and any other kind of device that supports a 10MHz clock input.

这是发烧友众所周知的事实，时钟信号是数字信号处理的基础。例如，如PCM信号之类的数字信号，在时间轴上每秒被分割成细小的数万个部分。如果时间轴在D/A转换过程中发生波动，基本很难将相同的模拟音频波形转换为原始波形。这是更真实的DSD音频信号，以MHz的速度在时间轴进行。因此，准确的时钟信号对于数字音频信号的重生是非常重要的，特别是在超高的采样率时，高清晰度的文件如最新的DSD 22.5MHz或PCM 768kHz。
在主时钟发生器的核心，晶体振荡器存储在一个温度控制箱 - “热炉”，晶体振荡在理想的温度条件下保持最佳和稳定的性能。因此，此恒温晶体振荡器（简称OCXO）以更高的标准±3ppb的频率温度特性和±0.1 ppm的频率精度，产生极其精确的10MHz时钟信号。
此外，前面显眼的模拟仪表将内部通常是看不到的晶体振荡器的状态可视化，可随时检查。

CG-10M是主时钟发生器，带出USB DAC、网络播放器、CD播放器和其他支持10MHz的时钟输入的设备最好的性能。

Main Features

• High-precision "TEAC Reference OCXO" – an ‘oven-controlled’ crystal oscillator
• ±3 ppb frequency temperature characteristics, ±0.1 ppm frequency precision
• 4 x 10MHz clock output connectors (gold-plated BNCs)
• Completely independent and isolated circuit
• High capacity toroidal-core power transformer
• OVEN STATUS gauge with dimmable backlight, for monitoring oscillation stability 
• 3-positioned Patented Pin-Point feet to minimise vibrations
• Full-metal body to eliminate incoming electromagnetic noise
• Compatible with TEAC UD-503 and NT-503 (as of November 2017)

Spec description

Clock Outputs     
Connectors    BNC×４ (gold-plated)
Output Sampling Frequency    10MHz
Output Impedance    50Ω
Output Level    0.5Vrms (sine wave)
OCXO (Crystal Oscillator)     
Clock stabilization time    2 minutes
Frequency temperature characteristics    within ± 3ppb (when shipped new)
Frequency precision    within ± 0.1ppm (when shipped new)
Power     
US/Canada    AC 120V, 60Hz
UK/Europe    AC 220-240V, 50Hz
Power Consumption     
warming up     
US/Canada    15.4W
UK/Europe    15.8W
stable     
US/Canada    10.0W
UK/Europe    10.8W
Dimensions    290(W)×84.5(H)×248.7(D)mm /
11.4”(W)×3.3”(H)×9.8”(D)
Weight    3.6kg / 7.9 lbs.
Operating Temperature    +5˚C to +35˚C
Operating humidity range    5% to 85% (no condensation)
Storage Temerature    -20˚C to +55˚C