| 摘要 |
PURPOSE:To receive an image a V channel as it is without any disturbance from adjacent channels by converting a signal transmitted at a frequency other than frequencies of television channels to a frequency of an idle television channel. CONSTITUTION:When a switch 5 is turned on in a reception state, a convertor 6 operates and a signal of desired frequency is selected among input signals with a band-pass switch 7 and converted into a signal of the frequency of the idle channel. The frequency signal of the idle channel is extracted through a band-pass filter 8, inputted to a mixer 4, and transmitted to a receiver side. In this case, when the convertor 6 operates, an attenuator 3 operates to attenuate the level of a television signal of a channel adjacent to the idle channel converted by the convertor 6, and the converted signal is received without any disturbance of the television signal of the adjacent channel. |
