| 摘要 |
PURPOSE:To extremely improve the reception of signals of both broadcasting and communication satellites. CONSTITUTION:The reception signal cables led from the antennas 11-13 are connected to the input contact plugs 1a-1e respectively. Then the plug 1a is connected to one of both fixed contacts of a 1st switch 2, the plugs 1b and 1c are connected to both fixed contacts of a 2nd switch 3, and the plugs 1d and 1e are connected both fixed contacts of a 3rd switch 4. The movable contacts of both switches 3 and 4 are connected to both fixed contacts of a 4th switch 5. The movable contact of the switch 5 is connected to the other fixed contact of the switch 2, and the movable contact of the switch 2 is connected to an output contact plug 2a. A reception signal cable 21 of a receiver 20 is connected to the plug 2a. Furthermore the receiver 20 produces a control data signal which is supplied to a selection control circuit 8, and the selection of the 1st switches 2-6th switch 7 is controlled. |
