| 摘要 |
PURPOSE:To allow plural monitor receivers to observe a video image by a video signal from one and same TV camera by receiving a video signal of plural different carrier frequencies simultaneously at the reception side, demodulating each signal individually and using a video switch so as to select the video signal switchingly. CONSTITUTION:An optical reception terminal equipment is provided with band pass filters 33a-33c, demodulators 34a-34c and a video switch 35 corresponding to carrier frequencies f1-f3. Then a signal corresponding to the carrier frequencies f1-f3 is extracted respectively from an optical signal sent from a TV camera by the band pass filters 33a-33c and the signal of the carrier frequencies f1-f3 is demodulated into a video signal by demodulators 34a-34c and the video switch 35 is used to select each video signal with respect to the plural monitor receivers 21-23 switchingly. Thus, the same video signal is displayed on the plural different monitor receivers 21-23 simultaneously. |
