CH Precision first clock generator is finally in production. Meet the T1 10MHz Time Reference. It will be shown at the Munich High End Audio show in rooms F221 and E115... 

Timing in digital systems is the key to carry and to faithfully convert digital audio content. Why so? Let’s imagine that a digital to analog converter chip is fed from a clock containing a high level of phase noise, otherwise known as jitter in the time domain. Instead of being evenly spaced in time, the digital audio information converted to the analog domain is spread randomly around the ideal time, introducing undesired artifacts. The better the clock source, the lesser the phase noise, the more precise the conversion.

An ultra-low phase noise, high accuracy 10MHz oven controlled oscillator (OCXO) forms the heart of the T1, CH Precision’s  first clock generator.

To avoid the inexorable drift in time of oscillators, a GPS option is available. Locking on satellites’ ultra-stable caesium clocks, it ensures that the T1 will perform identically today and for many years to come.


• 10MHz nominal frequency
• Square wave: 1V or 500mV peak to peak, selectable
• Sine wave: 1V or 500mV peak to peak, selectable
• 6 outputs, 75Ω BNC coaxial


• Transformer-coupled outputs
• Independant control for each output


• GPS input to suit the CH Precision GPS option
• 1 pulse per second (1 PPS) TTL input for external
• Ethernet for remote control (CH Control App) • USB for  rmware upgrade

Power Supply

• Dedicated ultra low noise, three-stages discrete regulated linear power supplies for each section
• Galvanically isolated power supplies for the OCXO, the OCXO buffer and the output buffers
• Magnetically and electrostatically shielded toroidal mains transformer


• OCXO  tted inside a heavy aluminum block for improved core temperature stability
• OCXO aluminum block mounted on soft silicon gel for maximum damping
• Power transformer mounted on silent blocks


Nominal frequency
10MHz, +/-20ppb typical, factory adjusted
Tuning range
+/-1ppm via 1PPS input

External 1PPS Input

Input level

100mV to 5V peak to peak
Input impedance
75Ω, BNC coaxial connector

10MHz Outputs

Output level
1V or 500mV, peak to peak, loaded with 75Ω termination, adjustable for each output
Waveform type
Sine or Square wave, adjustable for each output
Output impedance
75Ω, 6x BNC coaxial connectors


Display: 480 x 272 pixels 24bits RGB AMOLED
Power Supply: Selectable 100V, 115V or 230V AC, 47Hz to 63Hz, < 1W in Standby
Overall Dimensions and Weight: 440mm x 440mm x 133mm, 26kg

Control / Software Update: Ethernet based system control via Android CH Control App / USB port for software update