High performance of DMTD system used in a composite clock.

Author

Plantard, C. ; Mbaye, P.M. ; Vernotte, F.

Author_Institution

UTINAM, Besancon Obs., Besancon, France

fYear

2009

fDate

20-24 April 2009

Firstpage

530

Lastpage

534

Abstract

We present the DMTD (Dual Mixer Time Difference) results with its ZCDs (Zero Crossing Detectors) use in the composite clock. This composite clock is based on servoing a VCO by both a cesium beam clock and a hydrogen maser. We obtain an output signal which combines the long term stability of the cesium clock, the middle term stability of the H maser and the short term stability of the VCO. The DMTD system contribution at 100 MHz to the frequency instabilities is expected to be around 10^-15@1s. This paper describes the DMTD system used to obtain the information necessary for the oscillator control.

Keywords

atomic clocks; circuit stability; mixers (circuits); voltage-controlled oscillators; DMTD system; VCO; cesium beam clock; composite clock; dual mixer time difference; frequency 100 MHz; frequency instability; hydrogen maser; long term stability; middle term stability; oscillator control; short term stability; zero crossing detector; Clocks; Detectors; Frequency; Hydrogen; Low pass filters; Masers; Observatories; Stability; Virtual manufacturing; Voltage-controlled oscillators;

fLanguage

English

Publisher

ieee

Conference_Titel

Frequency Control Symposium, 2009 Joint with the 22nd European Frequency and Time forum. IEEE International

Conference_Location

Besancon

ISSN

1075-6787

Print_ISBN

978-1-4244-3511-1

Electronic_ISBN

1075-6787

Type

conf

DOI

10.1109/FREQ.2009.5168237

Filename

5168237