| 摘要 |
PROBLEM TO BE SOLVED: To eliminate the fault of an AGC time constant switch operation and to eliminate a demodulation error at the time of the burst start of a reproduction repeating device where an AGC time constant switch system for self- station wraparound interference removal is applied. SOLUTION: A synchronism circuit 10 detecting the on/off timing of the burst of a repeating desire wave from a demodulated signal outputted from a demodulation circuit 5 and a timer circuit 11 giving a control signal which turns on/off transmission output to a transmission circuit 7 from the output are installed. The timer circuit 11 turns on the transmission circuit 7 to transmit burst at timing earlier than the burst start timing of a desired wave transmission signal and time longer than the time constant of an AGC circuit 4 before. |
