OSA 3030 EUDICS Digital Cesium Frequency Standard 3030 EUDICS (European Digital Cesium Standard) hightech compact Atomic Frequency Reference OVERVIEW Atomic clocks standards are needed to generate highly accurate frequencies. These are typically used as Primary Reference in telecommunications networks, navigations systems, ground stations (LORAN C, GPS, GLONASS, GALILEO, etc…), long wave and medium wave broadcasting stations. Atomic clocks can also be used for specific internal navigation systems where external “time reference signals” are not available or insufficiently protected regarding transmission risks. Another field of application is for astrophysics, where very high precision atomic clocks can be used for longbaseline interferometers. The Oscilloquartz’s 3030 Eudics is specifically designed and produced with the latest technology to serve these complex applications. The OSA 3030 Eudics offers a unique set of operational features and performance, including greatly enhanced and easy integration into industrial, professional and time and frequency host systems. HIGHLIGHTS Excellent frequency accuracy of 5x10-12 over a large temperature range. Smallest volume/foot print in its class in rugged housing Monitoring and control available via RS232 making the 3030 extremely easy to operate. APPLICATIONS Primary Reference Clock for: Navigation System Ground Stations (Loran C, GPS, Galileo, Glonass) Long and medium wave broadcasting stations Localization Field interchangeability of any sub-module can be achieved in minutes. Oscilloquartz S.A. / Rue des Brévards 16 / CH-2002 Neuchâtel Switzerland / Tel.+41(0)32 722 55 55 / Fax+41(0)32 722 55 56 [email protected] / www.oscilloquartz.com Large base Interferometry

OSA 3030 EUDICS Digital Cesium Frequency Stan- PRINCIPLE OF OPERATION GENERAL STRUCTURE The OSA EUDICS 3030 frequency standard consists of a Quartz oscillator frequency-locked to the hyperfine resonance of free Cesium atoms. The Cesium atomic beam resonator provides an output signal which is strongly peaked around the central frequency = 9.192631770 GHz, the width of the resonance being less than 500 Hz. The OSA 3030 EUDICS includes 5 main blocks: The stability of the resonance frequency with time and its insensitivity to environmental variations, especially to temperature, are the main reasons...

FREQUENCY STABILITY Averaging Time, x, Seconds SWATCH GROUP ELECTRONIC SYSTEMS

OSA 3030 EUDICS Digital Cesium Frequency Standard TECHNICAL SPECIFICATION OUTPUT SIGNAL Frequency 10MHz Level value 7dBm / 50Ω Accuracy ± 1x10-12 Reproducibility ± 1x10-12 Stability (Allan standard deviation) 1s 2x10-11 10 s 2x10-11 100 s 5x10-12 1000 s 1.5x10-12 10 000 s 5x10-13 100 000 s 3x10-13 Floor 3x10-13 Fractional frequency deviation Temperature -5°C + 55°C ± 2x10-12 Resolution < 1x10-15 Range ± 1x10-9 Settability Harmonic distortion Harmonics > 30dBc Spurious > 70dBc SBB phase noise spectral density (BW 1HZ) 1 Hz -90/dBc 10 Hz -120/dBc 100 Hz -135/dBc 1 kHz -145/dBc 10 kHz -145/dBc 100...