Title :
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
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;
Conference_Titel :
Frequency Control Symposium, 2009 Joint with the 22nd European Frequency and Time forum. IEEE International
Conference_Location :
Besancon
Print_ISBN :
978-1-4244-3511-1
Electronic_ISBN :
1075-6787
DOI :
10.1109/FREQ.2009.5168237
