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English LT1550
The full-spectrum enhanced forward transmitters LT1550 engineered for multi-services operators (MSOs) to increase network capacity to satisfy an ever-growing subscriber demand for bandwidth.
LT1550 operating wavelength conforms to ITU standards and works with PBN’s Erbium Doped Fiber Amplifier Module (EDFA). It allows for fullspectrum analog/digital broadcast and narrowcast channels, providing the utmost flexibility for MSOs during the transition to all-digital.
It employs an advanced RF circuit design and a high quality / low-chirp laser. The module offers a superior frequency response, as well as low distortion and noise characteristics. In addition, it has a cutting-edge optoelectronic design for the delivery of high-quality transmissions, in both analog and digital formats, over passive fiber optic networks.
The standard 19” 1RU rack chassis provides simple installation. Integrated WEB server help users finish the operation and maintenance easily and remotely.
DOCSIS 3.1 Compatible with operating bandwidth up to 1218 MHz
High quality 1550 nm low-chirp analog DFB laser
RF amplifier gain blocks with advanced GaAs technology for better performance
Conforms to ITU wavelength DWDM standards
Frequency response of 45 MHz to 1218 MHz for both broadcast and narrowcast applications
Automatic gain control (AGC) for a consistent optical modulation index (OMI)
Automatic thermo-cooler control (ATC) for a consistent laser temperature
Automatic power control (APC) for a consistent optical output power
Self-contained 19” sub rack 1 RU with integrated universal mains power supply
RF input test points
Status LEDs indicate module condition and simplify troubleshooting
Ethernet port for SNMP/HTTP network management
Remote firmware upgrade and auto upload/download of configuration files through integrated web interface or using PBN’s NMSE
| Optical Performance | |
| Optical wavelength | ITU channel 21 to 51 |
| Optical outputs | 1 or 2 ports, on front panel |
| Optical output power | 7, 8, 9, 10 dBm |
| Optical connector | SC/APC, FC/APC, LC/APC, E2000/APC |
| Laser RIN | < -155 dB/Hz |
| SBS suppression | +16 dBm |
| Fiber length compensation for dispersion | 0 ~ 60 km |
| RF Performance | |
| RF bandwidth | 45 to 1218 MHz |
| RF flatness | ± 0.75 dB |
| RF return loss | > 16 dB (45 ~ 1218 MHz) |
| AGC range | ± 3 dB |
| RF impedance | 75 Ω |
| RF inputs | 2 x RF connectors (SCTE F-Type), on rear panel |
| BC input level, nominal | 15 dBmV for 3.2% OMI (15 to 25) |
| NC input level, nominal | 25 dBmV for 3.2% OMI (25 to 35) |
| RF test point | -20 ±1dB 2x SCTE F-Type on front panel (1) |
| Isolation between BC and NC inputs | > 55 dB (45 – 1218 MHz) |
| Alarms and laser status | Front-panel LEDs, SNMP Traps |
| Network port |
10/100 BaseT with HTTP and SNMP |
| Link Performance (2) | |
| MER | > 38 dB |
| BER | < 1E-9 |
| CNR | 52 dB |
| CSO | 63 dB |
| CTB | 65 dB |
| General | |
| Power supply | Dual power supply unit 90 ~ 264 Vac, 50 ~ 60 Hz |
| Power consumption | 19 W |
| Dimensions | 44 x 483 x 394 mm |
| Operating temperature | -20 ~ 55 ℃ |
| Storage temperature | -40 ~ 80 ℃ |
| Humidity (no condensation) | 10% ~ 95% |
Notes：
(1) One SCTE F-Type is for NC, and the other one is for Laser input.
(2) Channel Loading: 30 NTSC + 117 channels QAM256 (ITU-T, J.83 Annex-A, 6dB below NTSC). All are measured with PBN referenced optical receiver with 5 km single-mode optical fiber 0 dBm.
| LT1550-[U-V]-[W]-[X][Y][Z] | |
| Options: | |
| U-V | Number of Outputs and the Optical Power of each Port |
| 1-07 | Single output at 7 dBm |
| 1-08 | single output at 8 dBm |
| 1-09 | Single output at 9 dBm |
| 1-10 | Single output at 10 dBm |
| 2-06 | Two outputs and each output is 6 dBm |
| W | ITU grid channel (Optical wavelength) |
| 21 | 192.1 THz (1560.61 nm) |
| 22 | 192.2 THz (1559.79 nm) |
| 23 | 192.3 THz (1558.98 nm) |
| … | … |
| 49 | 194.9 THz (1538.19 nm) |
| 50 | 195.0 THz (1537.40 nm) |
| 51 | 195.1 THz (1536.61 nm) |
| 35 | 193.5 THz (1549.32 nm) |
| X | Optical connectors |
| S | SC/APC |
| F | FC/APC |
| L | LC/APC |
| E | E2000/APC |
| Y | Number of 220 Vac Power Supply Units |
| 1A | Single mains power supply 220 Vac |
| 2A | Dual mains power supplies 220 Vac |
| 1D | Single mains power supply -48 Vdc |
| 2D | Dual mains power supplies -48 Vdc |
| AD | With two mains power supplies of 220 Vac and -48 Vdc |
| Z | Power Cable |
| AU | Power Cable for Australia |
| CH | Power Cable for Switzerland |
| CN | Power Cable for China |
| EU | Power Cable for Europe (not for use in UK) |
| UK | Power Cable for UK |
| US | Power Cable for USA |
