| 摘要 |
PURPOSE:To prevent the operation of an earth receiving station from being stopped even when a control receiver breaks down by providing plural receivers which can be used as both control receivers and channel receivers. CONSTITUTION:Which receiver of plural receivers 4 is used as the control receiver and the channel receiver is decided by controlling the receivers from a host computer through terminal stations 7. At the time of using a receiver 4a as the control receiver, and using a receiver 4b as the channel receiver, the host computer issues a command to receive a CSC carrier frequency through a terminal station 7a to a data processing part 46 of the receiver 4a, and a logical part 47 sets a second local oscillation frequency for receiving the frequency at a frequency synthesizer 48 according to the command. At that time, when the receiver 4a breaks down, the receiver 4b is used as the control receiver by the control of the host computer, and a receiver 4c waits and receives the CSC. |
