| 摘要 |
PROBLEM TO BE SOLVED: To compensate a voltage drop in a DC current path route from a power supply unit to a CS(communication satellite) antenna and to securely switch the polarized wave of the CS antenna. SOLUTION: In the reception system, a reception signal form a CS antenna 8 is amplified in a booster 12, it is mixed with reception signal from the other antennas 2 to 6, a four distributor 30 distributes the signals and the signals are transmitted to a terminal. The distributor 30 and the booster 12 can transmit a voltage signal form a terminal side to a CS antenna 8-side. The booster 12 generates and outputs power supply voltage for power supply (15 V) to units 10 and 6c on a transmission path between,itself and the antennas 2 to 6 from the voltage signal from the terminal side. A power supply unit 32 on a side nearer to the terminal than the distributor 30 generates the voltage signal which is higher than the voltage (11 V or 15 V) of a polarized wave switch signal from a CS tuner 34 by prescribed voltage Vd and can supply power to the CS antenna 8 and the units 12, 10 and 6a and outputs it to the CS antenna 8-side.
|
