光纤拉远单元又称之为远近光端机，即近端光端机与远端光端机,是光信号传输的终端设备，由中欧体育公司自主研发的精密型机架式近端光端机外观精致，功能强大，性价比高，远近光端机专门针对专业客户对于防尘、防潮、防高/低温、高稳定性等特殊需求由中欧体育公司自主研发的。
The optical fiber remote unit is also called the far and near optical transceiver, that is, the proximal optical transceiver and the remote optical transceiver, is the terminal equipment of optical signal transmission, the precision rack-type near-end optical transceiver independently developed by Lielong company is exquisite, powerful, cost-effective, LYR-400-1310S wall-mounted remote optical transceiver is specially designed for professional customers for dustproof, moisture-proof, high/low temperature, high stability and other special needs independently developed by Lielong company.
L光端机一般是成对使用的，分为发射端和接收机。发射端完成的是电→光信号转换，并且把光信号发射出去用于光纤传输;接收机是把从光纤接收到的光信号还原为电信号，完成光→电转换。整个传输系统由三个部分构成：光源（发射端）、传输介质、检测器（接收端）。
Optical transceiver is the terminal equipment for optical signal transmission. It achieves the purpose of long-distance transmission through signal modulation, photoelectric conversion and other technologies, and the use of optical transmission characteristics. Optical transceivers are generally used in pairs, which are divided into transmitters and receivers. The transmitter completes the electrical-→-optical signal conversion, and the receiver restores the optical signal received from the optical fiber into an electrical signal to complet.e the optical-→electrical conversion.
远近端光端机是将所要传输的语音以及数据信号，从基站中耦合出来后，进入光端机，进行光电转化处理，再将这些数字信号进行复用处理，使多路低速的数字信号转换成一路高速信号，并将这一信号转换成光信号
The near-end optical transceiver converts the voice and data signals to be transmitted into photoelectric conversion, and then multiplexes these digital signals to convert multiple low-speed digital signals into a high-speed signal, and converts this signal into an optical signal. At the receiving end, the optical signals are converted into electrical signals, and finally these data signals are restored into voice and data signals.
从光近端机输入至光纤，经过光纤传输到光远端机，光远端机把光信号转为射频信号，进入 RF 单元进行放大，信号经过放大后送入发射天线，覆盖目标区域。
The input signal of an optical transmitter (near-end unit) is a radio frequency (RF) signal. At the front end, the RF signal is sent to the optical transmitter input for electronically controlled attenuation, predistortion compensation and automatic power level control, and then the laser chip is driven for RF/optical modulation, and the RF signal is converted into an optical modulation signal.
中欧体育的远近光端机采用低底噪的产品设计，搭配了射频能量滤波分项单元设备，进行动态调节，内置滤波模块对有源设备产生的驻波及底噪进行过滤吸收，降低底噪抬升产生的驻波回流
The FILER filter technology for optical transceiver color effectively reduces noise radiation, using imported high-quality filter chips, three-stage filtering to reduce radiation generation, and will not bring radiation to precision equipment and sick people
远端机均具备具有双面单排条形孔状式散热有效对设备进行散热，保证设备安全稳定运行，可自动调节输入功率，以满足信号稳定性合理性。
The interface side of the optical transceiver is equipped with uplink and downlink gain adjustment buttons, so that engineers can adjust the reasonable uplink and downlink signal gain value through the on-site antenna feeder coverage and user needs to achieve the best signal coverage effect.
设备采用蓝光背影式单彩显示，可显示设备基本参数，如：呈现时间，运行状态，工作温度，湿度，以及故障及异常报警等。
The optical transceiver is equipped with a display screen and multiple indicator lights. The operating status of the equipment and the signal input and output power are provided for the engineer's reference through the display screen. The external panel adjusts amplifier gain, uplink and downlink signals, and more.
远近光端机经过模数转换与数字编码处理，灵敏度更高、抗干扰能力更强、传输质量与传输容量更优越。
The optical transceiver has a built-in data acquisition and storage function, which can upload the current equipment running status and signal information to the background through the feeder of signal transmission, and the working status of all optical transceivers in the system can be clearly seen on the background server.
光端机彩用FILER滤波技术有效降噪音辐射，使用进口优质滤波芯片，三级过滤减少辐射产生，不会对精密设备及病体人群带来辐射
The FILER filter technology for optical transceiver color effectively reduces noise radiation, using imported high-quality filter chips, three-stage filtering to reduce radiation generation, and will not bring radiation to precision equipment and sick people
光端机接口侧配备上下行增益调节按键，工程师可通过现场天馈覆盖及用户使用需求来调节合理上下行信号增益值，达到最优的信号覆盖效果。
The interface side of the optical transceiver is equipped with uplink and downlink gain adjustment buttons, so that engineers can adjust the reasonable uplink and downlink signal gain value through the on-site antenna feeder coverage and user needs to achieve the best signal coverage effect.
光端机配备显示屏及多个指示灯。设备运行状态及信号输入输出功率通过显示屏供工程师参考。外置面板可调节放大器增益、上下行信号等。
The optical transceiver is equipped with a display screen and multiple indicator lights. The operating status of the equipment and the signal input and output power are provided for the engineer's reference through the display screen. The external panel adjusts amplifier gain, uplink and downlink signals, and more.
光端机内置数据采集存储功能，可通过信号传输的馈线将当前设备运行状态及信号信息上传至后台，在后台服务器上可清楚看见系统中所有光端机的工作状态。
The optical transceiver has a built-in data acquisition and storage function, which can upload the current equipment running status and signal information to the background through the feeder of signal transmission, and the working status of all optical transceivers in the system can be clearly seen on the background server.
| 参数项目 | 上行 | 下行 |
|---|---|---|
| 产品型号 | DYTG-1550G | |
| 系统适应 | DPMR,DMR,PDT,NXDN，TETRA | |
| 频率范围 | 410.5~412.5MHz | 420.5~422.5MHz |
| 输出功率 | 0 dBm | ≥18 dBm |
| 增益 | ≥25dB | ≥25 dB |
| 带内波动 | ≤3.0 dB | ≤3.0 dB |
| 驻波比 | ≤1.3 | ≤1.3 |
| 噪声系数 | ≤3 dB | ≤3 dB |
| 射频功率范围 | -90到-110dbm | -90到-110dbm |
| 重量 | 5kg | |
| 外型尺寸(W*H*D) | 483*273*70 | |
| 材质 | 纯铝合金 | |
| 防水防尘 | IP58 | |
| EDS(静电防护等级) | IEC 61000-4-2(Level 4)±8kV(接触放电)±15kV(空气放电) | |
| Parameter items | Uplink | Downlink |
|---|---|---|
| Product model | DYTG-1550G | |
| System adaptation | DPMR,DMR,PDT,NXDN，TETRA | |
| Frequency range | 410.5~412.5MHz | 410.5~412.5MHz |
| Output power | 0 dBm | ≥35 dBm |
| gain | ≥25 dB | ≥25 dB |
| In-band fluctuations | ≤3.0 dB | ≤3.0 dB |
| VSWR | ≤1.3 | ≤1.3 |
| Noise figure | ≤3 dB | ≤3 dB |
| RF power range | -90arrive-110dbm | -90arrive-110dbm |
| weight | 5kg | |
| Dimensions(W*H*D) | 483*273*70 | |
| Material | Pure aluminum alloy | |
| Waterproof and dustproof | IP58 | |
| ESD protection level | IEC 61000-4-2 (Level 4) ± 8kV (contact discharge) ± 15 kV(air discharge) | |
| 参数项目 | 上行 | 下行 |
|---|---|---|
| 产品型号 | DYR-1310S | |
| 系统适应 | DPMR,DMR,PDT,NXDN，TETRA | |
| 频率范围 | 410.5~412.5MHz | 420.5~422.5MHz |
| 输出功率 | 0 dBm | ≥41.35 dB |
| 增益 | ≥41.35 dB | ≥41.35 dB |
| 带内波动 | ≤3.0 dB | ≤3.0 dB |
| 驻波比 | ≤1.3 | ≤1.3 |
| 噪声系数 | ≤3 dB | ≤3 dB |
| 射频功率范围 | -90到-110dbm | -90到-110dbm |
| 重量 | 6kg | |
| 外型尺寸(W*H*D) | 270*100*400 | |
| 材质 | 黑/金色纯铝合金，双面散热 | |
| 防水防尘 | IP58 | |
| EDS(静电防护等级) | IEC 61000-4-2(Level 4)±8kV(接触放电)±15kV(空气放电) | |
| 表面处理 | LTG阳极氧化 | |
| Parameter items | Uplink | Downlink |
|---|---|---|
| Product model | DYR-1310S | |
| System adaptation | DPMR,DMR,PDT,NXDN，TETRA | |
| Frequency range | 410.5~412.5MHz | 420.5~422.5MHz |
| Output power | 0 dBm | ≥35 dBm |
| gain | ≥25 dB | ≥25 dB |
| In-band fluctuations | ≤3.0 dB | ≤3.0 dB |
| VSWR | ≤1.3 | ≤1.3 |
| Noise figure | ≤3 dB | ≤3 dB |
| RF power range | -90arrive-110dbm | -90arrive-110dbm |
| weight | 5kg | |
| Dimensions(W*H*D) | 483*273*70 | |
| Material | Pure aluminum alloy | |
| Waterproof and dustproof | IP58 | |
| ESD protection level | IEC 61000-4-2 (Level 4) ± 8kV (contact discharge) ± 15 kV(air discharge) | |
| Surface treatment | LTG anodizing | |
