1The product overview

1.1 The product overview

1550nm Direct Modulated Optical Transmitter products adopt the high linearity, optical isolation, the DFB, thermoelectric cooling DFB laser produced by ORTEL, AOI, Fujitsu, Mitsubishi and other world-renowned semiconductor companies. It can provide high-quality images, digital or compressed digital signal long-distance transmission for cable television and telephone communications. Built-in RF driver amplifier and control circuitry to ensure the machine’s CNR, CTB, CSO target. Comprehensive and reliable optical circuits and laser output power stability Temperature stability of thermoelectric cooler control circuit to ensure optimal machine performance and long-life laser stability. Laser is the most expensive machine components, machines equipped with microprocessors. The microprocessor software to monitor the working state lasers, operating parameters from the panel LCD display. Once the laser operating parameters deviate from the permissible range set by the software, the microprocessor will automatically turn-off laser power. Flashing yellow light prompts alarm panel LCD prompts cause of the malfunction (non-human factors that cannot be damaged laser). RF pre-distortion technology, ensuring the case of CSO-performance system for maximum CNR. In addition, the use of 19 “1U standard rack, built-in high performance switching power supply can be 85 ∽ 265Vac City Network voltage work.

1.2 The features

1.2.1) High quality: original system optimization control technology and RF pre-distortion technology ensure that the system can acquire the maximum CTB, CSO, and SBS targets in the case of excellent performance CNR
1.2.2) Reliability: The 19 “1U standard rack, built-in high-performance dual switching power supply, it can work in the backup at 85 ∽ 265Vac City Network Voltage, MS-level automatic switching; chassis cooling automatic temperature control.
1.2.3) Intuitive: The laser is the most expensive machine components, machine equipped with microprocessor monitors the working state of the laser, the panel LCD window displays the operating parameters. Once the laser operating parameters deviate from the permissible range set by the software, micro-processing will automatically turn off laser power, yellow light goes on to warn, the panel LCD prompts the cause of troubles.
1.2.4) Power plug: Aluminum structure using plug switching power supply, allows for heat dissipation and replacement. And dual power supply hot and cold backup.

2 The product structure diagram

2.1 The Electrical block diagram

2.2 The transmitter’s front panel, back panel diagram

3 The main technical indicators

No. Item Units Parameter Note
1 Laser Type DFB
2 Wavelength nm 1550±10
4 Optical output power mW 4~10
5 Optical Connector Type SC/APC
6 Frequency range MHz 47~750(862)
7 CNR dB ≥52.0
8 Flatness dB ±0.83
9 RF input level dBuV 80
10 C/CTB dB ≥65.0
11 C/CSO dB ≥65.0
12 RF input impedance Ω 75
13 RF Input Return Loss dB


14 [550~750(862) MHz

14 VCC V 90~265Vac
15 Power W ≤50
16 Working Temperature 0~50
17 Storage temperature -20~85
18 Working relative humidity % 20%~85%
19 Size 19″×15″×1.83″ (W)x(D)x(H)
20 Network management interface RJ45