WT1550EM20 1550nm External Modulated Optical Transmitter Suppliers
Home / Products / HFC Transmission Equipment / 1550nm Optical Transmitter Series HFC Transmission Equipment / WT1550EM20 1550nm External Modulated Optical Transmitter

WT1550EM20 1550nm External Modulated Optical Transmitter

WT1550EM20 series optical transmitter adopts top-international brand external modulated laser and external modulator, Prevail patent pre-distortion circuit, and SBS control circuit. Overall indexes reach well-known brand type levels, and the price is inexpensive. We have sold thousands of products over the years. The products save plenty of costs for the operator’s network construction and get many users a good reputation.

  • Hardware specifications
  • Features

    ◆ This 1550nm optical transmitter can be used in long-distance transmission.

    ◆ Double microwave source SBS control, +13~+19dBm adjustable, 0.5dB step.

    ◆ Adopt the DFB laser and LiNbO3 external modulator.

    ◆ Support Ethernet transponder

    ◆ Support WEB and SNMP network management.

    ◆ Hot backup dual power modules

    Block Diagram


    Technical Parameters

    Optical Parameters

    Item Unit            Value
    Optical Wavelength nm 1545~1560 (or specified by the user)
    Side-mode Suppression ratio dB >30
    Relative Intensity Noise dB/Hz <-160
    Wavelength Adjustment Range GHz +/-50GHz
    Optical Power dBm 2x5, 2x6, 2x7, 2x8, 2x9, 2x10
    SBS Threshold Value dBm +13~+19 (Continuously adjustable)
    Laser Linewidth MHz 0.3

    Model Test Indicators

    Test Model C42 D59 D84
    Channel Plan CENELEC42 PAL D59 PAL D84
    Channel Number TV/FM/QAM64 42/0/0 59/0/0 84/0/0
    Bandwidth Noise 5 5 5
    CNR Tx/Rx 55 54 52.5
    CNR Link 1 54 53.5 52
    CNR Link 2 53 52.5 50.5
    CNR Link 3 50.5 50.5 49
    CSO Tx/Rx and Link 1 64 64 64
    CSO  Link 2 63 64 64
    CSO  Link 3 62 62 62
    CTB 62 62 62

    Test Condition

    First stage EDFA First paragraph fiber length Second stage EDFA Second paragraph fiber length RX SBS
    (dBm)
    Tx/Rx No No No no 0dBm 13.5
    Link 1 No 35km no no 0dBm 13.5
    Link 2 16dBm 65km no no 0dBm 16
    Link 3 13dBm 50km 13dBm 50km 0dBm 13.5

    Technical Data Sheet

    Item Unit Technical Parameters
    RF range MHz 47~1003
    RF flatness  dB ±0.75
    RF return loss dB >16
    RF input impedance Ω 75
    RF input connector type F type
    Input level range dBµV 80±5
    AGC control range dB +3~-3
    MGC adjustable range dB 0~15
    Optical connector SC/APC, FC/APC
    Operating temperature °C -5~45
    Storage temperature °C -30~+70
    Power Source Specification V 90~265VAC
    36~72VDC
    Consumption W ≤60
    Dimension mm 483(L) × 455(W) × 44(H)
    Total Weight kg 5.5


    External Function Description:

    Front Panel

    1 Power indicator 2 AGC indicator 3 RF  indicator
    4 Laser indicator 5 LCD 6 ESC key
    7 UP key 8 DOWN key 9 Enter key
    10 RF input port (optional) 11 -20dB RF input test port


    Indicator Description

    Power indicator One power supply LED yellow
    Two power supplies LED green
    AGC indicator AGC mode LED green
    MGC mode LED off
    RF  indicator Normal LED green
    Abnormal LED flash red
    Laser indicator Bias current, cooling current and output power are all normal LED green
    At least one of bias current, cooling current and output power is abnormal LED flash red

    Rear Panel

    1 Ground stud 2 Power module 3 Fan
    4 RF input port (or on the front panel, optional) 5 RS232 interface 6 LAN interface
    7 Optical output interface A (or on the front panel, optional) 8 Optical output interface B (or on the front panel, optional)

    Power Module

    220V Power Module

    1 Mounting screws
    2 220V power outlet
    3 Fuse
    4 Power switch


    48V Power Module


    1 Mounting screws
    2 + Positive terminal block
    3 - Negative terminal block


    Menu System

    Main Menu

    Display Comments
    1.Disp Parameters Menu one: Display parameters
    2.Set Parameters Menu two: Set parameters
    3.Alarm Status Menu three: Alarm status


    Display Menu

    Display Comments Display Comments
    Laser Output Output optical power +24V Read: +24V monitor voltage
    Laser Bias   Laser current +12V Read: +12V monitor voltage
    RF  CSO CSO monitor voltage -12V Read: -12V monitor voltage
    Laser Cooling   Cooling current LASER: Laser status
    OMI(rms)   Total modulation degree SBS Module Temp: SBS module temperature
    RF Mode RF control mode BOX Temp: Overall temperature
    AGC Adjusted value with AGC mode MCU Temp: MCU temperature
    MGC Adjusted value with MGC mode S/N: Serial number
    +5V Read: +5V monitor voltage Version: Version number
    -5V Read:   -5V monitor voltage Work Time: Work time


    Set Menu

    Display Comments Remarks
    Set   RF   MODE Set RF control mode MGC and AGC two modes selectable
    Set  AGC Set  MGC Set RF adjusted value Adjustable range 0~15dB with MGC mode
    Adjustable range -3~+3dB with AGC mode
    Set SBS Suppression Set SBS value Range 13~19dBm, 0.5dB stepping
    Set ITU Set optical wavelength Range ±50GHz
    Set Channel Distance Set channel distance 6MHz, 7MHz, 8MHz
    Set LASER Set laser status ON/OFF
    Set IP Address Set IP address
    Set Mask Set subnet mask
    Set Gateway Set gateway
    Set Trap1 Address Set trap1 address
    Set Trap2 Address Set trap2 address
    Set Buzzer Alarm Set buzzer alarm ON/OFF
    Restore Factory Cfg Restore factory settings


    Alarm Menu

    The displayed alarm content Comment
    RF IN Status HIGH(LOW)                The RF input signal is high (low)
    Laser Bais HIGH(LOW)          The laser bias current is high (low)
    Laser TEC HIGH             The laser cooling current is high
    OutPutPower  Status HIGH(LOW)      The output optical power is high (low)
    -5V  Status HIGH(LOW)             The -5V voltage is high (low)
    +5V  Status HIGH(LOW)          The +5V voltage is high (low)
    +12V  Status HIGH(LOW)         The +12V voltage is high (low)
    -12V  Status HIGH(LOW)         The -12V voltage is high (low)
    +24V  Status HIGH(LOW)         The +24V voltage is high (low)
    Laser   OFF The laser is off
    CSO Initialization failed The CSO initialization is failed
    Power invalid LEFT(RIGHT )           The left (right) power is invalid


    Communication Setup Descriptions:

    Communication Interface Description

    1) RS232 communication interface adopts DB9 standard connector, the pin definitions as follow:

    The serial communication uses the standard NRZ form, 1 starts bit, 8 data bits, 1 stop bit and the baud rate is 38400.

    1:No Connect 2:TX 3:RX
    4:No Connect 5:GND 6:No Connect
    7:No Connect 8:No Connect 9:No Connect

    2) LAN communication interface adopts RJ45 standard connector, the pin definitions as follow:

    1:TX+ 2:TX-   3:RX+
    4:No Connect   5:No Connect 6:RX-
    7:No Connect 8:No Connect


    WEB Network Management

    1. Open the IE browser, type the IP address and enter the interface as follows:

    2. Type the user name admin and the password 123456 (factory default), enter the following interface:

    There are 3 sub-interfaces:

    1) About1550 interface: Mainly described the basic information of the equipment.

    2) Disp Paraments interface: Mainly described the display menu of the equipment.

    3) Set Paraments interface: Change the device parameters in this interface.

    2. Click Set Paraments to enter Set Paraments interface as follows:

    The Item and Items columns list the parameters that can be changed, the Current column lists the present parameter values, the New column can select or type the new parameter values, and the Update column can update the parameters.

    The steps to change the parameters: find the item in the Item column, select the new parameter values in the New column, and click the corresponding Update button to update the parameters.

    The change steps in the Items are the same, but finally need to click the Restart Device button to take effect.

    Attention

    ● Before powering on, make sure that the grounding terminals of the chassis and power socket are reliably grounded, and the grounding resistance should be <4Ω, which can effectively protect against surges and static electricity.

    ● Optical transmitter is a highly technical professional equipment,its installation and debugging must be operated by professional technicians. Read this manual carefully before operating to avoid damage to equipment caused by fault operation or accident harm to the operator.

    ● When installing and debugging optical equipment, invisible laser beams may be emitted inside the fiber connector.Avoiding permanent harm to the body and eye, the fiber connector should not aim at the human body and human should not look directly at the fiber connector with the naked eye! 

    ● There must be no shielding outside the ventilation holes of the device. Poor ventilation will cause the index to decrease, and in serious cases will cause damage to the device.

    ● When cleaning the fiber end face, you must confirm that the optical source is turned off.

    ● When the fiber connector is not in use, put a dust cover to avoid dust pollution and keep the end surface of the optical fiber clean.

    ● When installing the fiber connector, apply appropriate force to avoid damage to the adapter. Otherwise, the output optical power may decrease.


    Installation

    ● Installation must be operated by professional technicians.

    ● Mounting the equipment in the standard 19 inch equipment rack.The fixing screws must be tightened after the equipment is installed in place.

    ● Reliably ground the equipment. The ground terminal is on the rear panel.Visually inspect each key (button) on the front panel to ensure that each button can move freely.

    ● Screw on the matched RF cable.

    ● Correctly clean the optical connector and connect the optical fiber.

    ● Connect an Ethernet cable.

    ● After all the steps are completed, make sure that the machine is intact and powered on.

about prevail
Hangzhou Prevail Communication Technology Co., Ltd.
"Unlock The Potential Of Communication With Our Innovative Devices."

The Company is a scientific and technological innovative company dedicated to research and development, production, sales and technical services of communication equipment, optical communication equipment, mobile terminal equipment and intelligent system of Internet of Things. With years of accumulation and accumulation in the CATV equipment manufacturing industry, the company's relevant product technology, performance and R&D level are in the advanced position in the same industry at home and abroad, and has been praised and trusted by many users at home and abroad. WT1550EM20 1550nm External Modulated Optical Transmitter Suppliers and Company in China. At the same time, the company has become an industry leader that can provide cable TV network equipment and data communication system overall solutions for radio and television operators.

  • Industry development years

    0+
  • Sales country

    0+
  • R & D team

    0+
  • Warehousing area

    0+
Enterprise Certification

Empowering businesses with our robust capabilities.

  • Zhejiang Province Science and Technology-based Small and Medium-sized Enterprises
  • CE certificate
  • CU Certificate
  • CU Certificate
  • UL Certificate
  • Environmental Management System Certificate-EN
  • Environmental Management System Certificate-CN
  • Occupational Health and Safety Management System Certification-EN
News