1550nm External Modulation Optical Transmitter
Model Number : ST1550E
Brand : SOFTEL
MOQ : 1 PCS
1. 1 Characteristics of the Transmitter
★ Both the external modulator and laser are imported from the United States or Japan.
★ Perfect pre-distortion circuit ensures the best CTB and CSO when the CNR is in high standard.
★ Perfect SBS suppress circuit and adjustable SBS in 13～19dBm，suitable for different types of CATV net.
★ AGC control.
★ Internal double power which can be changed automatically.
★ Automatically shell temperature control.
★ Internal microprocessor software has the function of laser monitoring, parameter display, fault warning, net management and so on. Once the working parameter of the laser goes out of the fixed value of the software, the machine will warn.
★ The transmitter provides RJ45 and RS232 standard interface for the connecting the computer and monitoring.
★ Preparation before installation
★ Please examine the machine to see if there is distinct
★ Please examine if the accessories is complete and the quality cards is here.
★ Please keep a space about 4.5cm between machines for ventilation.
★Please make sure: the socket works very well and earthed; The impedance ≤4Ω; 220V power with three cables，the middle one should connected to the ground。
★Please makes sure the key is turned to OFF and before the power is connected.
★ Please keep the interface of the fiber clean before connecting the fiber. The connector could choose FC/APC or SC/APC.
3. 2 Main Technical Parameters
Output power （dBm）
Optical return loss （dB）
Input level （dBmV）
Return loss （dB）
Input impedance （Ω）
Power loss （W）
Automatically shell temp control
Working relative Temp