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The Tele-Quarz CCO 200E-85 is part of the CCO 200 series of temperature-compensated crystal oscillators (TCXOs), designed for high frequency stability across varying temperatures. While a datasheet for the exact 7.151223 MHz variant isn't publicly listed, here's what we know about the series and similar models:

Key Features of CCO 200 Series
• Frequency Range: Typically between 4 MHz and 40 MHz
• Temperature Compensation: Uses a varactor circuit to adjust resonance frequency based on temperature changes
• Stability: Around ±0.5 ppm over 0°C to 50°C (for models like E06-05-06)
• Voltage Supply: Commonly 5V
• Output Type: HCMOS with Ulow < 1V and Uhigh > 4V
• Tuning Capability: External tuning via a potentiometer (E-variant)
• Pins: Includes Vcc, GND, reference voltage output, tuning input, and clock output

Construction Notes
• Built with a robust metal casing for thermal inertia
• Internal components mounted on a two-layer PCB without solder mask
• TL431 used for voltage regulation
• Kapton insulation for thermal and electrical isolation


The highly specific frequency of 7.151223 MHz is primarily used as the color subcarrier frequency in certain professional or older color television signal transmission systems.
This frequency acts as a highly stable time base for encoding and decoding the color (chrominance) information within the overall video signal.
Key Application
• Color Television Signal Systems: The frequency is cited in patent literature as the precise color subcarrier frequency for specific color television systems. In such systems, this frequency is the core clock reference from which all other color-related timing is derived.
General Context (High Frequency Band)

This frequency of falls within the High Frequency (HF) radio band ( to ), which is generally used for:

• Shortwave Radio: Long-distance international broadcasting.
• Amateur (Ham) Radio: Long-range communications.
• Military and Maritime Communications: Long-distance communication systems.

The component mentioned in the original query, a Tele-Quarts CCO 200E-85, is a Crystal Controlled Oscillator (CCO) or a Quartz Crystal. These components are essential for generating and maintaining the exact frequency required (like the color subcarrier) due to their high frequency stability and precision.