Title :
Quartz frequency standard with an extra-low aging rate for communication synchronization systems
Author :
Shmaliy, Yuriy S. ; Kurotchka, Alexander Ph ; Marienko, Anatoliy V.
Author_Institution :
Sichron Center, Kharkov, Ukraine
Abstract :
The application of a modulation method to the quartz crystal frequency stabilization to decrease the aging rate of an oven controlled quartz crystal oscillator (OCXO) and the crystal standards intended for communication synchronization systems are discussed. The description of these devices, in which the compensation of long-term frequency instabilities is realized with the use of the method, is given. The results of investigations of the quartz frequency standards of q1-88 type and their general performance with and without aging compensation are presented. It is also shown that for both regimes aging rates per month correspondingly to -(6...20)·10-10 and (3...24)·10-12 have been reached. With this the short-term Allan variance is (1...3)·10-12/sec
Keywords :
ageing; crystal oscillators; frequency stability; frequency standards; modulation; synchronisation; aging compensation; aging rate reduction; communication synchronization systems; crystal standards; long-term frequency instability compensation; modulation method; performance; quartz crystal frequency stabilization; quartz frequency standard; quartz frequency standards; short-term Allan variance; Aging; Communication standards; Filtering algorithms; Filtering theory; Frequency measurement; Frequency synchronization; Kalman filters; Ovens; Prediction algorithms; Time measurement;
Conference_Titel :
Electrotechnical Conference, 1998. MELECON 98., 9th Mediterranean
Conference_Location :
Tel-Aviv
Print_ISBN :
0-7803-3879-0
DOI :
10.1109/MELCON.1998.692436
