| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To enhance reliability by reducing a loss of a reception signal and by reducing the number of parts. <P>SOLUTION: A high signal, a low signal and a weather signal output from an antenna device 1 are converted respectively into IF frequencies by frequency conversion circuits 21, 22, 23, followed by conversion respectively into digital signals by AD circuits 31, 32, 33. The low signal is distributed by a distribution circuit 4 after digital-conversion, to be input respectively into a high/low switching circuit 51 and a weather/low switching circuit 52. The high/low switching circuit 51 selects either of the high signal or the low signal to be output to a high/low signal processing circuit 71, according to a control signal from a high/low switching control circuit 61. The weather/low switching circuit 52 selects either of the weather signal or the low signal to be output to a weather/low signal processing circuit 72, according to a control signal from a weather/low switching control circuit 62. <P>COPYRIGHT: (C)2009,JPO&INPIT</p> |
