| 摘要 |
PROBLEM TO BE SOLVED: To provide a booster surely separating a mixed signal into a terrestrial digital broadcast signal and a terrestrial analog broadcast signal and individually amplifying or attenuating them without causing reception radio disturbance. SOLUTION: At least one (first system) of systems for the terrestrial digital broadcast signal and the terrestrial analog broadcast signal, includes: a first frequency conversion means (27) for converting a frequency of the mixed signal 22 applied to the system into a frequency of an intermediate frequency signal 51; a SAW filter (28) for extracting the terrestrial digital broadcast signal or the terrestrial analog broadcast signal or a signal of a particular channel of the broadcast signals included in the intermediate frequency signal 51; a second frequency conversion means (29) for converting the frequency of the signal extracted by the SAW filter into the frequency of the mixed signal; and level adjustment means (32, 33) for adjusting a level of the signal extracted by the SAW filter or the signal frequency-converted by the second frequency conversion means. COPYRIGHT: (C)2005,JPO&NCIPI
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