Optical RF-TV signal sensing and transmission for terrestrial TV relaying stations

An evolutional optical RF-TV signal sensing and transmitting facilities were constructed and employed for a new type of TV relaying station. A LiNbO/sub 3/ optical modulator of Mach-Zehnder type at 1.3 /spl mu/m, which was used to modulate a light beam at 1.3 /spl mu/m with digital terrestrial television (OFDM) signals at a 470 MHz through 770 MHz band with a power level of 36 dB /spl mu/V obtained from a UHF-TV receiving antenna in the receiving facilities, was newly used to send these RF-TV signals to the transmitting facilities located up to 6 km apart from the receiving point. The system operation was satisfactory.