| 摘要 |
PURPOSE:To prevent beat disturbance due to a 38kHz harmonic by stopping a 38kHz reference oscillation only when a signal as the result of detection of long/medium/short wave broadcast is transmitted by an FM wireless stereo transmitter to a radio receiver. CONSTITUTION:An FM, long, medium or short wave broadcast radio wave from antennas 1, 2 is detected by a radio receiver 3, and the detected signal is transmitted by the FM stereo wireless transmitter 4 incorporated in a radio receiver tape recorder when a changeover switch SW9 is thrown to the radio reception position. When the SW9 is thrown to the tape position, a reproducing signal of a tape recorder 8 is subject to FM stereo transmission by a transmitter 4. A reference oscillator 7 in 38kHz used to form a composite signal of the transmitter 4 is grounded by an SW12 at the reception of a long/medium/short wave broadcast so as to stop the reference oscillation forcibly. Thus, the beat between the received radio wave and the harmonic in 38kHz is prevented and the FM monaural transmission is attained. |
