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Note: Precise phase and frequency comparator based on direct phase-time measurements
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SYSNO ASEP 0441135 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Note: Precise phase and frequency comparator based on direct phase-time measurements Tvůrce(i) Prochazka, I. (CZ)
Pánek, Petr (URE-Y) RID
Kodet, J. (CZ)Celkový počet autorů 3 Zdroj.dok. Review of Scientific Instruments. - : AIP Publishing - ISSN 0034-6748
Roč. 85, č. 12 (2014), s. 126110Poč.str. 3 s. Jazyk dok. eng - angličtina Země vyd. US - Spojené státy americké Klíč. slova Clocks ; Oscillators ; Stability Vědní obor RIV JA - Elektronika a optoelektronika, elektrotechnika Institucionální podpora URE-Y - RVO:67985882 UT WOS 000347168500083 EID SCOPUS 84919772395 DOI https://doi.org/10.1063/1.4904735 Anotace We are reporting on the design, performance, and application results of a phase and frequency comparator based on the direct phase-time measurement using a high performance event timer. The advantages of this approach are the simple implementation, a broad frequency range, and the clear interpretation of the measured results. Primarily we analyzed the background instability of the instrument in a common-clock test when a 200 MHz clock signal was connected to both inputs and the noise bandwidth was kept at 5 Hz by a preprocessing of the measured data. The results show that the Allan deviation of the background instability follows 4 x 10(-14)/tau for a wide range of averaging intervals from 0.1 s up to 10(4) s. These results are better than background instability of commercially available state-of-the-art instruments based on the phase difference multiplication. Finally the instrument was used for comparison of two H-masers. This experiment proofed that one of possible applications is a comparison of low-noise highly stable frequency sources and measurement of their frequency stability in the time-domain. The noise background of the instrument was negligible for averaging intervals longer than 100 ms Pracoviště Ústav fotoniky a elektroniky Kontakt Petr Vacek, vacek@ufe.cz, Tel.: 266 773 413, 266 773 438, 266 773 488 Rok sběru 2015
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