TERRESTRIAL DIGITAL BROADCAST RE-TRANSMISSION APPARATUS

摘要

PROBLEM TO BE SOLVED: To provide a terrestrial digital broadcast re-transmission apparatus for simultaneously receiving a terrestrial digital broadcast program comprising a plurality of channels and capable of retransmitting the program to a blind spot.

SOLUTION: An input filter 11 selects a signal of a terrestrial digital broadcast program received by a reception antenna for each channel. Reception units 13a to 13n convert a signal of each channel selected by the input filter 11 into an IF signal and amplify the IF signal, and then convert again the converted signal into a signal with the original channel frequency and provide an output. The output signal from the reception units 13a to 13n is extracted via an RF filter 15, amplified by an RF final stage amplifier 16, and outputted from an output terminal 24 via an output filter 23. An MPU (microprocessing unit) 17 controls a gain of the RF final stage amplifier 16 on the basis of the level of the received signal from the RF final stage amplifier 16 via a BPF (band-pass filter) 19 and a detector 20 and a status outputted from the reception units 13a to 13n.

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