| 摘要 |
PURPOSE:To suppress the fluctuation of the reception field intensity, by transmitting the signal from the reception side to the transmission side to control the transmission output based on the detection information of the reception field intensity due to the AGC current. CONSTITUTION:The reception field intensity caused by the AGC current is decided in three steps based on the threshold levels (a) and (b) and by the receiver 5b in the receiving station B. In other words, the level between (a) and (b), the level less than (a) or the level higher than (b) is decided to produce the command information. This information is coded to be turned into the control pulse, and a conversion of speed is given to the main signal at the speed converting part 1b to form an idle time slot. The control pulse is inserted into the idle time slot to be transmitted to the transmitting station A via the modulating part 2b, the transmitter 3b, the output control part 4b, the transmission/reception sharing part 10b and the antenna 11b each. The pulse signal is received at the station A via the receiver 5a, the demodulating part 6a and the speed converting part 7a each. Then the fact that the contol pulse is inserted into the specified time slot is detected. After this, the control pulse is sent to the decoding part 9a. |
