| 摘要 |
PURPOSE:To easily know a steriophonic demodulation and its demodulation state, by changing a stereophonic display in response to a separation value of the stereophonic demodulating circuit. CONSTITUTION:By a level input corresponding to a detection output from the FM detection circuit 14, and a pilot signal from the pilot synchronozer 18, it is detected that a stereophonic wave has been received in the stereophonic display control unit 22, and it is displayed on the stereophonic indicator 36. Also, corresponding to the electric field intensity of a receiving signal which has been obtained by the intermediate frequency amplifier 12, a control signal is generated by the control voltage generating circuit 34, and a separation value of the difference signal demodulating circuit in the stereophonic demodulating circuit 16 is controlled by said control signal output. And, a detection level is changed by controlling the switching circuit 42 of the sterephonic display control circuit 22 by said separation value. |
