| 摘要 |
PROBLEM TO BE SOLVED: To simplify correction processing of amplitude fluctuation by making it possible to correct amplitude fluctuation caused by propagation even when a pilot signal cannot be received.SOLUTION: A frequency converter 11 converts a frequency of a reception signal on the basis of a local transmission signal of a local transmitter 12; and a gain control unit 13 controls a signal level of the reception signal on the basis of control voltage of a voltage output unit 14. A distributor 15 transmits one of distributed reception signals to another apparatus and the other to an A-D converter 16 for performing A-D conversion on the reception signal. A control unit 17 detects a pilot signal from the reception signal, transmits a first control signal to the local transmitter 12 on the basis of difference between a frequency of the pilot signal and a reference frequency, and transmits a second control signal to the voltage output unit 14 on the basis of difference between a signal level of the pilot signal and a pilot signal reference level. When detecting no pilot signal, the control unit 17 transmits the second control signal to the voltage output unit 14 on the basis of difference between an average value of signal levels of a carrier signal and a carrier signal reference level. |
