| 摘要 |
PURPOSE:To attain the RF output with excellent S/N and intermodulation distortion characteristic by connecting an antenna input terminal to a bypass line bypassing a signal in parallel with a booster circuit and the booster circuit itself via a selection circuit. CONSTITUTION:The 2nd selection circuit 9 is connected to the position B at the input of a strong electric field signal to an antenna input terminal 1, an input signal is sent to a distribution circuit 5 via a bypass line 10, the circuit 5 is connected to a VTROUT terminal 3, from which a signal is outputted as a video recording signal. The other output terminal of the circuit 5 connects to the 1st selection circuit 6, whether a VTR RF converter reproduction output signal or a TV signal sent through a CONVIN terminal 2 is selected and outputted to an antenna output terminal 4. The insertion loss of the circuits 5, 6 is caused and the output from the terminal 4 offers excellent intermodulation characteristic. The circuit 9 connects to the position A at the input of a weak electric field signal, the signal is amplified by a booster circuit 8 and sent to the circuit 5 to improve the S/N.
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