Technical passport / OTM-1550 1. Overview 1.1 About This Manual This instruction manual is a complete guide to install and operate the (1RU) OTM-1550 series 1550nm externally modulated optical transmitter. Please read the entire manual before beginning installation. This manual applies to OTM-1550 series externally modulated optical transmitter.
(CNR). To improve the SBS threshold, OTM-1550 series optical transmitter adopts SBS control technology which is independent researched and developed by ourselves. The threshold value can be set up to 19dBm.
Technical passport / OTM-1550 2.3 Test Condition First Second Second First stage paragraph stage paragraph EDFA (dBm) fiber length EDFA fiber length Tx/Rx 0dBm 13.5 Link 1 35km 0dBm 13.5 Link 2 16dBm 65km 0dBm Link 3 13dBm 50km 13dBm...
Technical passport / OTM-1550 UP key DOWN key Enter key RF input port (or on the Optical output interface A (or -20dB RF input test port rear panel, optional) on the rear panel, optional) Optical output interface B (or on the rear panel, optional) 3.1.1 Indicator Description...
Technical passport / OTM-1550 3.4.3 Set Menu Displayed parameters Comments Remarks Set RF control mode MGC and AGC two modes selectable Set RF MODE Adjustable range 0~15dB with MGC mode Set RF adjusted value Set AGC Set MGC Adjustable range -3~+3dB with AGC mode Set SBS value Range 13~19dBm, 0.5dB stepping...
Technical passport / OTM-1550 3.4.4 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)...
Technical passport / OTM-1550 3.4.7 Frequency Adjust ITU in DWDM To help DWDM applications, OTM-1550 can adjust optical wavelength. The adjustable range is ±100GHz, 50GHz stepping. The button on the front panel or the Ethernet interface will complete the adjustment. λ=c/f, c is the speed of light. It is the constant value.
4.2 Precautions Heed the following precautions when working with the OTM-1550. Read the installation instructions before connecting the system to the power source.
Mounting the OTM-1550 in the standard 19 inch equipment rack: 1. Place the equipment in the rack. 2. Use four screws fixed the mounting lug on the OTM-1550 front panel to the rack. 3. Reliably ground the equipment. The ground terminal is on the rear panel.
Technical passport / OTM-1550 4.3.4 Connecting the Ethernet Cable You can connect the OTM-1550 to your TCP/IP network in order to monitor and control the transmitter remotely. After you complete the installation procedures described in this chapter, you can use a network management system (NMS) to monitor and control the OTM-1550.
Technical passport / OTM-1550 5. Communication Setup 5.1 RS232 Communication Interface Description Adopt DB9 standard connector, the pin definitions as follow: 1: No Connect 2: TX 3: RX 4: No Connect 5: GND 6: No Connect 7: No Connect 8: No Connect...
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Technical passport / OTM-1550 Then you input your connection name, such as “SNMP38400”,and choose the serial port to connect with your equipment. As follows: Press the “OK” button shows the configuration page of serial port. As follows: Change the serial port configuration to 38400-baud rate, 8 data bits, no parity bit, 1 stop bit, no data flow control, press the “OK”...
Technical passport / OTM-1550 5.3 Operating Parameters Configuration Under the condition of power off, use the serial port lines to connect the RS232 port with the computer port. Open the Windows Hyper Terminal which you have set up. Then turn on the power, you will see the page as follows.
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Technical passport / OTM-1550 System supports the following commands: help ethcfg List internal commands of the system; settrap Configure the Ethernet operating parameters; community Configure the aim host IP address of the SNMP Trap; List Configure the SNMP group name;...
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Technical passport / OTM-1550 community This command configures the read-only group name and read-write group name. “Group name” is the concept of SNMP agreement like the password. Use the command “community ro” to configure the read- only, and “community rw” for the read-write. For example, input “community rw public”, “public” is the read-write group name.
Technical passport / OTM-1550 5.4 Remote Monitoring: SNMP LAN communication interface Adopt 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 A: Green indicator flashing means that the LAN port is sending data.
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Technical passport / OTM-1550 Type the user name admin and the password 123456 (factory default), enter the following interface: There are 3 sub-interfaces About1550 interface: Mainly described the basic information of the equipment. Disp Paraments interface: Mainly described the display menu of the equipment.
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Technical passport / OTM-1550 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.
In addition, if you suspect that the optical connector of OTM-1550 may have been exposed to contamination (by a dirty fiber cable connector, for example), you should properly clean the OTM-1550 optical connector before connecting the optical fiber.
Technical passport / OTM-1550 6.2 Troubleshooting Should a problem occur, see if the symptoms are listed in Table 6-1. Table 6-1: Troubleshooting Solutions Indicator Fault Alarm menu content Solution status phenomenon The left (right) Plug in the left (right) power...
Technical passport / OTM-1550 problem, contact Customer Service. 6.3 After-sales Service Description 1. If the equipment fault is resulted from the users’ improperly operation or unavoidable environment reasons, we will responsible maintenance but ask suitable material cost. 2. When the equipment breaks down, immediately contact local distributor or directly call our technical support hotline 86-0571-82576002, 18967160936.
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