C Plantard et al 2008 Metrologia 45 S82 doi:10.1088/0026-1394/45/6/S13
C Plantard, P M Mbaye and F Vernotte
Show affiliationsWe present a composite clock based on servoing a voltage controlled oscillator (VCO) by both a caesium beam clock and a hydrogen maser. We wish to obtain a physical realization of a new reference timescale with an output signal which combines the long term stability of the caesium clock, the middle term stability of the H maser and the short term stability of the VCO. The system contribution at 100 MHz to the middle term frequency instabilities is expected to be around 10−15 at 1 s. This paper describes the dual-mixer time-difference (DMTD) system used to obtain the information needed for the control of the VCO.
Issue 6 (December 2008)
Received 15 July 2008, in final form 10 September 2008
Published 5 December 2008
C Plantard et al 2008 Metrologia 45 S82
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