| 摘要 |
PURPOSE:To attain small size, light weight and high reliability by controlling a local oscillator using a channel selection synthesizer and an intermediate frequency converter and selecting a band. CONSTITUTION:An earth station making communication transmits information as to the transmission speed with an opposite station to a line control station via a satellite. The line control station designetes a beam where a outgoing station in the satellite exists and an idle channel of a destination beam based on the said information, controls the 2nd local oscillator 20 for reception, a band pass filter 21 and the 2nd local oscillator 23 for transmission and assigns the transmission and reception channel and a required band by using the band limit filter 21. Further, the information of a satellite channel is transmitted to an outgoing earth station and a destination earth station by using a control line at the same time and the line control station gives a command to the transmission or standby by using the designated channel. |
