| 摘要 |
PROBLEM TO BE SOLVED: To provide a method by which a connection switch can automatically be started without permitting a user to start it and therefore power voltage is supplied to a satellite converter where operability is improved much more. SOLUTION: Power voltage is supplied to a low noise block by using plural receivers-decoders connected to the same low noise block through a cable supplying power voltage intended for an intermediate frequency signal and the low noise block. The receivers-decoders are cascade-connected and the receiver- decoder 5 on an upstream is provided with a transmission module 23. The transmission module 23 transmits the intermediate frequency signal of a connector 8 for connecting it to the noise block to a connector 9 for connecting it to the receiver-decoder of a downstream when the receiver-decoder on the upstream is not operated, and supplies power voltage between the same connectors to an opposite direction. |
