| 摘要 |
PROBLEM TO BE SOLVED: To provide a radio frequency control circuit which appropriately controls a high frequency processing unit and a modulation-demodulation processing unit, and can avoid communication impossibility when a communication-impossible frequency exists. SOLUTION: In a radio frequency control circuit, with respect to a frequency to be used that is specified by a main control unit 111, when IF or RF specified from received frequency information can not be used when referring to a frequency information storage unit 201, a signal processing control unit 102 reads contents to be changed from the frequency information, changes a set value of a NCO 106 via a setting change circuit 105 according to the contents or performs a frequency change of a local oscillator 109 via an RF control unit 110 to avoid communication impossibility. COPYRIGHT: (C)2008,JPO&INPIT
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