The SpHARO (Space High Accuracy Reference Oscillator) is a miniature quartz-controlled oscillator for space and airborne applications. The oscillator provides a mission frequency control of less than ±1ppm, plus excellent medium and short-term stability and low phase noise.
This is an oven-controlled quartz crystal oscillator (OCXO) using a “direct-heated” resonator, fabricated from AIRBUS Group-Airbus Defence and Space’s High Purity Quartz. This material is the purest and most highly qualified quartz in the world and provides the SpHARO resonator with excellent intrinsic radiation tolerance. The oscillator achieves good short-term and long-term stability as a result of rigorous resonator fabrication process controls and proprietary resonator.
|Stability (all causes)||<±5x10-7 (15 years)|
|Allan variance||<5x10-11 (1s – 100s)|
|Warm-up||<±5x10-7 in 5 minutes (-30°C)|
|Output||10 dBm sine|
|Power consumption||300 mW (steady state, 25C)|
|Size||50 x 35 x 15mm|
The SpHARO can be used as the master frequency reference in spaceborne applications where high frequency stability is required together with very low mass, and size and power consumption.