| 摘要 |
PURPOSE: A back plain of base station for small users in large area in satellite communications system is provided to satisfy a small number of users without equipping additional board to simplify components. CONSTITUTION: A back plain enable interconnection between each boards, which is equipped in shelf, is comprised of: many board slot to equip boards for base station equipment like CCU(Common Control Unit) and SCU(SCPC Channel Unit), PSU(Power Supply Unit) and ROC(Reference Oscillator Clock), etc; external power supply unit; data transmission port and voice communication port to connect with users; ROC(Reference Oscillator Clock) to provide reference clock for data transmission between boards on slot board.
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