| 摘要 |
PURPOSE:To detect quickly and easily a correct synchronizing signal, when the reception state is switched into the transmission state, by predicting the position of the synchronizing signal timewise at all times with a timer function of a local clock if the reproduction in the clock is disable, and detecting the correct synchronizing signal just after the reception of a signal is possible again. CONSTITUTION:The system is provided with an oscillation circuit 7 oscillating the local clock, a control circuit 8 performing control while monitoring the entire system and a timer circuit 9 controlled with the circuit 8 as shown in a figure. Thus, in this invention, the control circuit 8 controls the synchronizing detection timing at the transmission in place of a conventional detection timing controlling circuit 5, the timer circuit 9 controls the timing from the synchronizing signal detection just before the transmission until the timing when the synchronizing signal is received for the first time after the end of transmission, even if the data is interrupted because of the transmission, it is not taken as out of synchronism, but the system is kept as if the synchronism were being locked. |
