光馈扩展单元具有两点作用：对交换层传输的信号进行接收，若需要接收该数据要对交换层进行接收响应；对手持终端需要发送的信号数据进行收集，接收手持终端的发送信号向接入交换单元发送该信号并将其进行智能调节15-17db
The optical feed expansion unit has two functions: it receives the signal transmitted by the switching layer, and if it needs to receive the data, it needs to receive and respond to the switching layer; The signal data that needs to be sent by the handheld terminal is collected, and the transmitted signal of the handheld terminal is received and the signal is sent to the access switching unit and intelligently adjusted by 15-17db
馈扩展单元光口输出为15-17dB，替代无源器件解决无源器件增多带来的问题解决1：8的输出方式，同时设备本身也可当作天线使用信号为10dB，匹配MIF光馈天线
The optical port output of the feed expansion unit is 15-17dB, which replaces the passive components to solve the problems caused by the increase of passive components and solves the output mode of 1:8, and the equipment itself can also be used as an antenna with a signal of 10dB, matching the MIF optical feed antenna
光纤作为传输介质，具备低时延、低损耗、抗干扰等优势，确保通信信号的稳定传输。
As a transmission medium, optical fiber has the advantages of low delay, low loss, and anti-interference to ensure the stable transmission of communication signals.
通过核心汇聚单元把射频信号转为光信号。实现全光网络传输，确保通信信号的高质量传输。
The RF signal is converted into an optical signal through the core aggregation unit. Realize all-optical network transmission to ensure high-quality transmission of communication signals.
执行下行帧串行信号的光/电转换并进行波分复用
Perform optical/electrical conversion of the downlink frame serial signal and perform wavelength division multiplexing
接受并调制异步传输的信元以产生下行帧，并转换下行帧的并行数据为串行数据
Accepts and modulates asynchronously transmitted cells to generate a descending frame, and converts the parallel data of the descending frame into serial data
| 型号/Model | GR5100R |
|---|---|
| 应用层级/Application level | 三层 |
| 传输模式/Transmission mode | 支持全双工 |
| 频率范围/Frequency range | 80～470MHz |
| 带宽/bandwidth | 20MHz（频率可定制） |
| 光接收灵敏度/Light reception sensitivity | >-20dBm |
| 光通路/Light pathway | 数字光 |
| 射频输入信号/RF input signal | -5--10dBm |
| 射频输出信号/RF output signal | <0dBm |
| 光功率/Optical power | －5dBm |
| 工作电压/Operating voltage | 5-12V DC或220V AC |
| 光接口/Optical interface | FC/APC或LC/UPC |
| 光接口数量/Number of optical interfaces | 8 |
| 尺寸(高X宽X深)/Dimensions (HxWxD) | 88.9×483×383mm |
| 工作温度范围/Operating temperature range | -40℃～80℃ |
