| 摘要 |
PURPOSE:To avoid the out-of-synchronism for the frame when the frame is detected, by securing a synchronization of the bit phase of the digital signal received a time-division multiplication on the transmission line and the frame phase with the integrated bit phase and the frame phase of a station. CONSTITUTION:The frame memory 18 stores the signal read out of the elastic memory 12 and then reads the signal in the reference bit timing to secure the frame phase synchronization. And the control circuit 26 detects that the write/read addresses of the memory 12 approximate more than the fixed value when the preamble time slot is received and then gives a jump to both the reading address of the memory 12 and the writing address of the memory 18 by the time slot number less than the preamble time slot number. Thus the bit phase of the digital signal received a time-division multiplication and the frame phase can be synchronized with the integrated bit phase and the frame phase of a station. As a result, the out- of-synchronism can be avoided for the frame when the frame is detected. |
