A synchronization system of very low-frequency interferometers

被引：1
|
作者：
Tokmachev, D. A. [1 ]
Poletaev, A. S. [1 ]
Bezrukin, A. G. [1 ]
Chenskii, A. G. [1 ]
Zasenko, V. E. [1 ]
Gubin, N. A. [1 ]
机构：
[1] Irkutsk State Tech Univ, Phys Tech Inst, Irkutsk 664074, Russia
来源：
INSTRUMENTS AND EXPERIMENTAL TECHNIQUES | 2014年 / 57卷 / 05期
关键词：
Field Programmable Gate Array; Synchronization System; Phase Drift; Synchronization Unit; Initial Phase Difference;
D O I：
10.1134/S0020441214050108
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
A solution to the problem of synchronization of spaced autonomous data-acquisition systems and obtaining stable reference-frequency signals for measuring phases of very low-frequency (VLF) radio signals is described. The expediency of using GPS receivers and tunable crystal oscillators in the synchronization system of VLF interferometers is grounded. Measurement results of the phase stability of the reference signal, received from the designed device, are presented. The short-term frequency stability of a 200-kHz pulse signal at the output of the designed unit is no more than 1.5 x 10(-7), allowing one to measure the phase of VLF signals with an accuracy of no worse than +/- 0.81A degrees.
引用
收藏
页码：587 / 593
页数：7
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