缩 Drive EL——俯仰(Elevation) Amplifier) IDU——室内单元(Indoor Mean Square) RMS——均方根值(Root Unit) 2．2 Supply) Control Unit) Unit) 语 ACU——天线控制单元(Antenna Power ODU——室外单元(Outdoor Noise ADU——天线驱动单元(Antenna Unit) Drive LNA——低噪声放大器(Low 略 ADS——天线驱动系统(Antenna AZ——方位(Azimuth) UPS——不间断电源(Uninterrupted System)