Frequency-locked loop between a H-maser and a Cs clock

The time and frequency reference in Besancon is based on caesium clocks for absolute accuracy and long-term stability, on a H-maser for medium and long term stability, and on a liquid-He whispering gallery sapphire oscillator for best spectral purity and short-term stability. These standards are located in three different places. In order to obtain the full… CONTINUE READING