Picture signal transmitting system using CATV network in which the local oscillator is transmitted separately

Abstract

A picture signal transmitting system using a CATV network sends a picture signal from a transmission path to subscribers by using a radio transmitter and receiver, and in the picture signal transmitting system, there is no physical wire connection from a tap off of the transmission path to subscribers. The picture signal transmitting system using a CATV network includes a CATV center, a first radio transmitter and receiver connected to said CATV center through a CATV transmission path, and provided near a subscriber's house for concurrently sending out a side band signal obtained by up-converting a picture signal of a frequency bandwidth including a plurality of channels with a local oscillation signal of which level is larger than that of said side band signal, and the local oscillation signal, and a second radio transmitter and receiver provided in the subscriber's house for separately receiving the picture signal and the local oscillation signal sent out from the first radio transmitter and receiver, and down-converting the frequency bandwidth of the received picture signal with the received local oscillation signal to an intermediate frequency bandwidth.

Dependencies are inferred from the claim text.