| 摘要 |
PURPOSE:To prevent a data error for an equipment by absorbing a hit of a clock signal and a phase fluctuation at switching of clock redundancy. CONSTITUTION:A reception clock from a clock supply device is converted into a TTL level by level conversion section 1-1, 2-1 of clock reception panels 1, 2 in duplicate and 6 SEL 3-1 of a switching control panel 3 selects the received clock. A PLOGEN 3-6 generates a PLO phase comparison frequency from the selected reception clock. The PLO1-3, 2-3 of the clock reception panels 1, 2 of each system are operated by the entirely same PLO phase comparison frequency to obtain POL outputs of a same phase in each system. |
