| 摘要 |
PURPOSE: To input the signal of the highest level and not to input the signal of a high level and a narrow band by switching the working antenna to another that inputs the signal having the highest receiving level of a correlation signal and also having the lowest level of the signal of a high level and a narrow band. CONSTITUTION: The AGC data stored in a storage part 10 are compared with each antenna number by a comparator 11, and these comparison results are outputted. The levels of the signals sent from a signal distributor 3a are detected at a level detecting part 13 and stored in a level storage part 16. At the same time, the level signals sent from the part 13 are compared with the reference voltage at a level deciding part 15a, and these level decision results are stored in the part 16. A control part 12 controls a switching part 3 to receive through an antenna the signal of the highest receiving level producing a correlation signal and the signal having a low level of a signal of a high level and a narrow band based on the AGC data comparison result of each antenna number stored in the part 10, the presence/absence detection data on the correlation data stored in the part 10, and the level detection data and the level decision result which are stored in the part 16. |
