题干：（注：黄底为正确选项，白底为错误选项）		微波链路的主要组成部分是终端站和中继站。
| Microwave link mainly consists of terminal station and repeater station.		SDH数字微波主要应用于通信网络中的骨干传输电路。
|SDH digital microwave are mainly used in the transmission backbone circuit of communication network.		ZTE MW PR10环回功能，包括两种模式，本地环回和远端环回。
| ZTE MW PR10 loop back function includes two modes that are inward loopback and line loopback. 		STM-1max.book118.com.| The rate of STM-1 is 155.55M.		微波链路的主要组成部分是终端站和中继站。
| Microwave link mainly consists of terminal station and repeater station.		SDH数字微波主要应用于通信网络中的骨干传输电路。
|SDH digital microwave are mainly used in the transmission backbone circuit of communication network.		ZTE MW PR10环回功能，包括两种模式，本地环回和远端环回。
| ZTE MW PR10 loop back function includes two modes that are inward loopback and line loopback. 		STM-1max.book118.com.
| The rate of STM-1 is 155.55M.		ZXMW-PR10设备允许输入的最大电平是-20dBm 
| The maximum input level of ZXMW-PR10 is –20dBm 		PDH数字微波主要应用于对网络管理综合能力要求较高的重要通信电路。
| PDH digital microwave are mainly used in the crucial communication circuits that has higher requirements on integration ability of network management. 		1+1的链路要在合成器中加3.5dB的损耗，使用软波导要加至少1dB的损耗；
| For 1+1 link, it is necessary to add 3.5dB loss in combiner. For flexible waveguide, at least 1dB loss is needed.		微波频率越高，信息容量越大。
| The higher microwave frequency, the information capacity is bigger. 		1＋1HSB配置下，单端合路器损耗为7dB。| For 1+1 HSB configuration, single port combiner loss is 7dB. 		误码仪中的LOS表示信号丢失，LOF表示帧失步或者帧丢失。
| LOS in Error Code tester means the loss of signal, and LOF means loss of frame.		ZXPR10/1+1的IDU重3.7kg。
| The weight of ZXPR10/1+1 is 3.7kg. 		ZXPR10的IDU电源接口中，NC端接-48V。
| For ZXPR 10 IDU power supply port, the NC end is connected to -48V. 		中兴微波中的IDU电源位置在MU板子上。
| In ZTE microwave equipment, the location of IDU power supply is on MU board.		中兴的A1版的ODU是长方体形状。
| ZTE A1 version ODU is cuboids shape.		中频电缆不可以和220V电源线缆扎在一起。
| IF cable cannot be bundled with 220V power supply wire. 		天线极化孔对准H，属于垂直极化。
| When polarization hole of antenna aims at H direction, this belongs to vertical polarization. 		中兴IDU电压范围为-40VDC～-50VDC。
| ZTE IDU power supply range is -40VDC--50VDC. 		IDU可以不用接地，因为IDU是装在龙门架上的，机架本身接地。
| IDU does not need grounding because IDU is mounted on 19inch rack and this rack has already been grounded. 		ZXPR10（1+1）热备份设备，分离式ODU的安装是：将两个ODU安装在合路器上，并将合路器波导口与专用安装架波导口相连，
使用U型抱杆将安装架固定在杆上。天线和安装架的波导口通过一根软波导相连。
| For ZXPR10 (1+1) hot standby equipment, the installation procedure of divided ODU is: install two ODU on 
combiner, and connect the waveguide port of combiner with waveguide port of special mounting rack; 
then, fix mounting rack on pole by using U-shape pole. 
Antenna is connected with waveguide port of mounting rack by a flexible waveguide.		安装过程中，中频电缆应直接与ODU单元直接连接。
| During the installation process, IF cable should be connected with ODU units directly. 		设备加电时，将IDU单元开关置于“OFF”，插上电源线插头。先打开机房内开关电源上空气开关，再将IDU单元开关置于“ON
| When turn on power supply, set IDU switch to OFF, and then connect power supply. Next, turn on the circuit breaker of on-off 

中兴认证判断题库.doc