New Features of Different Frequency Generating Systems Due to the Use of Electrodeless Rigidly Mounted BVA Quartz Crystal Resonator

摘要

Design and production data of BVA quartz crystal resonators and oscillators have been presented in the past at the Frequency Control Symposium. 1,2,3,4. The BVA 5 MHz crystal equipped frequency sources exhibit a new blend of remarkable performances such as 10-11 daily stability ,5x10-13 short term stability (1 to 30 s time intervals) and close to the carrier low phase noise (1 Hz : -120 dBc, 10 Hz : -140 dBc), whereby retaining the customary crystal oscillator benefits of small volume, high reliability and low price, as opposed to more sophisticated frequency generators which would be required to achieve comparable performances. Examples illustrating the impact of the Oscilloquartz BVA OCXO in different frequency generating systems will be presented : -in cesium frequency standards - in a hydrogen frequency standard -in a precision distribution sub-system for satellite ground stations - in high hierarchy exchanges of digital networks, synchronized by the master-slave method.