| 摘要 |
PURPOSE: An RF modulator having two inputs is provided to receive two broadcasting signals simultaneously and select one of the received broadcasting signals. CONSTITUTION: An RF modulator having two inputs includes a modulation block(220) for modulating an audio/video signal, and a booster block(210) for amplifying an RF input signal and mixing the amplified signal with the output signal of the modulation block to provide the mixed signal to a television receiver. The modulator further includes the first RF input terminal(RFIN-1) for receiving the first RF signal, the second RF input terminal(RFIN-2) for accepting the second RF signal, and an RF output terminal(REOUT) for outputting an RF signal selected by the booster block. The booster block selects one of the first and second RF signals.
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