| 摘要 |
PURPOSE:To properly adjust each tuning means with respect to a receiving channel by supplying a correction voltage set properly in response to the tuning deviation at each reception channel to each tuning means of a receiving circuit. CONSTITUTION:A control voltage of a PLL circuit 3 is fed to an antenna tuning circuit 2 and an RF tuning circuit 4a via adder circuits 24, 25. The correction value stated later is fed to other input terminal of each adder circuit. A memory 22 stores a correction value representing the deviation of the tuning frequency of the said tuning circuit at each reception channel in addition to a control program. In the receiving operation, the correction value corresponding to the reception channel is read and set to correction registers 23, 24. A correction voltage in response to the correction value is obtained and added to the control voltage from the circuit 3, and the result is fed to each tuning circuit.
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