The OCXO (Oven Controlled Crystal Oscillator) is a miniature, stable, high frequency quartz-controlled master oscillator for space applications. The oscillator provides a mission frequency control of less than ±2pp107, coupled with excellent medium and short-term stability and low phase noise. This oven-controlled quartz crystal oscillator uses a high-overtone SC-cut resonator fabricated from Airbus Defence and Space-grown High Purity Quartz. This material is the purest and most highly qualified quartz in the world and provides the OCXO resonator with excellent intrinsic radiation tolerance.
|Frequency||10 MHz – or custom, e.g. 5-15 MHz|
|Stability (all causes)||<±1x10-7 (15 years)|
|Ageing (over life)||<±1x10-11/day|
|Low phase noise|
|Allan variance||<2x10-12 (1s – 100s)|
|Warm-up||Less than ±1x10-8 in 10 minutes (-30°C)|
|Power consumption||<1W (steady state, 25C)|
|Size||25 x 25 x 17mm|
The OCXO can be used as the master frequency reference in spaceborne applications where a high frequency is required, together with good frequency stability, low mass, and size and power consumption.
Also as a low noise VHF VCO in satellite-based frequency generation applications.
ESA Hylas, Telstar-II
FOAMO Quartz Ultra-Stable Oscillator (USO)
Miniature Master Oscillator
Frequency generator unit (FGU)
L Band SSPA