| 摘要 |
<p>The system includes a video modulator wherein a locally generated carrier wave of a certain frequency is modulated by a video signal from a video tape recording and reproducing machine, the modulated signal being delivered to a television receiver. A plurality of ganged switches have a first position to turn off the tuner of the television receiver and to simultaneously couple the modulated signal to the receiver's video if amplifier for reproduction on the screen. A second position turns the receiver's tuner on, disconnects the modulator from the receiver, and connects the machine to a second tuner, so that one can record video signals in one channel by the machine while observing picture information of another channel on the screen.</p> |
