激光发射机 前端扩展范围的光发射机 80km范围+9dBm 双输出 EMLT-1550-ER series are high-performance laser transmitters for Head End applications with HFC/RFOG/FTTH networks. EMLT-1550-ER transmitters incorporate an high quality external modulator, narrow linewidth DFB laser and pre-distortion circuit which allows a transmission range of 80 km, while maintaining a high CNR level and excellent CSO and CTB performance. With an internal phase modulator that broadens the laser linewidth, the launch power level can be adjusted up to +18.5 dBm for extended distance of transmission of 80km in single mode fiber. The EMLT-1550-ER has two optical output ports as standard. EMLT-1550-ER transmitters can support 77 NTSC analog channels. Designed to be digitally ready, the transmitters can also be loaded with QAM modulated data and HDTV channels. They are available in output power level of: +6 dBm, +8 dBm and +9 dBm. Features: - Designed for Head End applications - Transmission range to 80km - DFB laser & external modulator - SBS level can be set to +18.5dBm - Dual output ports standard - Excellent CSO, CTB, CNR - Automatic Gain Control (AGC) and Manual Gain Control | Technical Specifications | | Model Number | EMLT-1550-ER-09 | | | | | Technical Specifications | | | | | | Transmission Range | 80km standard | | | | | Laser Wavelength Range | 1550nm ± 15nm (standard), available with 40 DWDM wavelengths | | | | | Optical Output Power | 9dBm minimum | | | | | Number of Optical Output | 2 SC/APC connectors | | | | | Noise Bandwidth | 4 MHz | | | | | Carrier Noise Ratio (CNR) | 52dB @ 0dBM received power | | | | | Composite Second Order (CSO) | -63dB minimum | | | | | Composite Triple Beat (CTB) | -63dB minimum | | | | | SBS Suppression Level | User setting of +13.5dBm, 16.5dBm, 18.5dBm | | | | | RF Gain / OMI Adjustment Range | +6dB to -6dB | | | | | Input RF Power Level | 8 - 20 dBmV | | | | | Frequency Plan | NTSC 77 channels + QAM channels + QAM | | | | | RF Frequency Range | 45 MHz to 870 MHz | | | | | Flatness in Frequency Range | ± 0.75dB over full range | | | | | Input RF Impedance | 75 Ohm | | | | | Input RF Return Loss | 16 dB minimum | | | | | Mechanical Specifications | | | | | | Operating Temperature Range | 0°C to +50°C | | | | | Storage Temperature Range | -40°C to +70°C | | | | | Power Consumption | 75 W maximum | | | | | Power Supply | 80 -240 VAC, 43 - 62 Hz | | | | | Housing Dimensions | 19 | | | | | Front Panel Display | LCD | | | | | Control / Monitoring | DFB laser temperature, output power | | | | | Alarm Status | Over temperature, over current | | | | | Optical Connectors | SC/APC | | | | | | | | | 
