| 摘要 |
PROBLEM TO BE SOLVED: To reduce the power consumption of the amplifier not in use. SOLUTION: In the case of amplifying a cable television (CATV) signal and a BS(CS)-IF signal, a stabilized power supply 16 applies a drive voltage to a CATV outgoing amplifier section 2 and a CATV incoming amplifier section 4 via a contact 3-2 of a 2nd switch SW2. In the case of amplifying a ground wave broadcast signal and the BS(CS)-IF signal, the stabilized power supply 16 applies a drive voltage to VHF amplifier sections 6, 9 and a UHF amplifier section 11 via a contact 3-1 of the 2nd switch SW2. |
