Optical transmitters mo418L, mo428L
Product description
The optical transmitters mo418L, mo428L (hereinafter - the transmitter) are a high performance 1310/1550 nm wavelength optical transmitter for forward
path transmission of broadcast services. Both types of transmitters permit to use one optical ber for CATV and SAT IF signal transmission, mo428 transmitter
has dual optical output to increase the number of users.
Transmitter is equipped with web server and SNMP agent.
Web server provides remote diagnostics and control of the transmitter via Ethernet type network using a Web browser.
SNMP agent operates together with the transmitter and provides remote diagnostics of the device over SNMP protocol. The transmitter generates all
alarms and events as SNMP traps that can be sent to a host manager.
The product is intended for indoor usage only.
Safety instructions
The transmitter must be installed in accordance with IEC 60728-11 and national safety standards.
The transmitter is powered from a 12 V power supply unit. This voltage is not dangerous to life.
The power supply unit must have a short circuit protection.
Any repairs must be made by a qualied personnel.
Do not connect the 12 V power supply unit into the mains socket until all cables of transmitter have been correctly connected. The mains socket must
be easily accessible.
Disconnect the transmitter power supply by removing the power supply cable from the mains socket.
Do not expose this transmitter to moisture or water splashes, make sure no liquid lled objects, e.g. vases, are placed near or on the unit.
Avoid placing the transmitter near heat sources, e.g. central heating components or in areas of high humidity.
Keep the transmitter away from naked ames.
If the transmitter has been stored in cold conditions for a long time, bringing it into a warm environment may cause condensation. In such cases let it
warm up for at least 2 hours before plugging it into the mains.
To ensure proper ventilation do not block the ventilation openings.
IMPORTANT: Mounting of the transmitter is allowed vertical only and the free ow of air through the unit must be not restricted. If the transmitter is
installed in a 19” rack system additional forced air cooling fans may be required (see Table 7 - Operating temperature range). Always leave 10 cm of free
space from the top, front and bottom of the unit to allow heat dissipation.
Safety of laser product
Optical Transmitter module contains laser diode sources operating at 1310/1550 nm. These devices are rated under IEC60825-1:2007 “Safety of Laser
Products”, Part 1: Equipment classication and requirements as CLASS 1M laser product.
When operating the equipment note the following:
Most ber optic laser wavelengths (1310 nm and 1550 nm) are totally invisible to the eye and will cause permanent eye damage.
Never look into the end of a ber on a powered device through a magnifying device (microscope, eye loupe, magnifying glass, etc.). Before using such
devices always double check that power is disconnected or, if possible, completely disconnect the unit from any power source.
To verify the light output always use an instrument, such as an optical power meter.
Operate only with the proper optical ber installed in the transmitter optical connector.
Whenever the optical connector is empty the laser transmitter should be turned off.
Before applying power always connect a ber to the output of the device.
Never leave equipment with radiating bare bers accessible - always cap the connectors.
Cleaning of optical connectors
The ber ends may be damaged if contaminated connectors are inserted. The warranty does not cover some types of damage, made by the customer.
The standard optical connector for optical transmitter is SC/APC.
During the operation each ber connector may be contaminated by dust or dir. Even tiny particles of dust will affect the transmission quality. Dusty ber
optic connector will contaminate other connected optic parts. If optical reception power and output level of the receiver decrease, active ber connection
should be cleaned and maintained.
Always clean all the ber optic connectors before setting.
Reel cleaners or prepackaged lint free wipes or swabs with alcohol are the most convenient means of cleaning optical connectors.
Fiber connectors should never be left uncovered.
Do not exceed the minimum bending radius when connecting cable to the system.
Structure diagram
Vers. 1.01
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External view
1 - ◄ - RF input, DC output +12 V switchable (F socket)
2 - ► - RF output (input signal loop-through) (F socket)
3 - ETHERNET - LAN port (RJ45 Ethernet 10/100 Base-T)
4 - indicator of LAN activity, yellow LED
5 - indicator of the transmitter activity, green LED
6 - DEF - button for default settings
7 - data bus connector
8 - power distribution bus connector
9 - +12 V powering input (screw terminal)
10 - OPTICAL OUT - optical output (SC/APC socket)
11 - RF TEST - RF test point (F socket)
Figure 1. External view of the transmitter
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Installation instructions
Read the safety instruction rst.
Connect the 75 Ω load to the unused F sockets.
Shielded cable is recommended for Ethernet connection.
MOUNTING
The module or mounting bracket must be xed with steel screws Ø 3.5-4 mm. The screws are not included in a package.
Mounting on a wall by screws Mounting on a bracket (supplied)
Perpendicular to the wall Parallel to the wall
Mounting on DIN rail
Figure 2. Mounting of the transmitter
Figure 3. Mounting to DIN rail
Figure 4. Mounting from DIN rail
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Figure 5. Mounting or removing to/from DIN rail of plastic spacers (supplied).
Connection of cables
RF input
quick coaxial bridge
(ordering number 21876)
-
power distribution bus
(ordering number 21875)
75 W load
(supplied)
Figure 6 a. Powering of the transmitter Figure 6 b. Powering of the transmitter
via screw terminal block via power distribution bus
OPERATING
Operating and adjustment
Optical transmitter with device server provides remote diagnostics and control of the transmitter via Ethernet type network using a conventional WEB
browser (e.g., MS Internet Explorer, Google Chrome, Opera, Mozilla FireFox, etc.)
To perform conguration of the transmitter connect it to the network card of the computer (or a network switch) using UTP cable.
If “RF Out” and/or “RF test” connectors is not used, connect the 75 Ω terminator.
Communicating with the Web browser
For rst connection to device server, enter the default IP address value 192.168.1.99 in the address line of WEB browser. When a Web browser connects
to the device server, start page as shown below will appear in the Web browser.
DC input
+
RF input
UP410S
UP410S - power supply
Figure 7. Start screen
Note: The device is protected and unauthorized users can only see the “Status” page.
In order to have full control of the equipment it is necessary to LOGIN to the device server.
When trying to operate the device a page “Authentication required” appears (Figure 8) asking to enter the “User Name” and the “Password”.
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Figure 8. “Authentication required” page
Note: The buttons are shown in different languages depending on the WEB browser and the actual Windows regional setting.
Network Conguration
Conguration of network parameters, according to system administrator’s requirements, has to be performed before using the transmitter in local network.
The Network conguration menu (Figure 9) allows to modify the IP parameters, user name and password. For security reasons it is highly recommended
to change the default login data.
New network parameters will be applied only after rebooting the device server. The device server reboots after clicking “Save Cong” button. Rebooting
may take time about 1 min.
Default network settings
Login settings:
User Name: admin
Password: admin
Network settings:
IP address – 192.168.1.99
Net mask – 255.255.255.0
Gateway – 192.168.1.2
SNMP settings:
Host IP – 192.168.1.1
SNMP read community string = public
SNMP write community string = private
SNMP trap target community string = public
Enable Trap= On
To reset network and login settings of the device server to their default values, press twice the “DEF” button on transmitter front panel (Figure 1, pos.6)
as explained:
1) Press the “DEF” button until the transmitter activity LED (Figure 1, pos. 5) lights up in green.
2) Press the “DEF” button a second time. Green LED ashing for a few seconds indicates a successful procedure of rewriting data.
Warning: Changing IP conguration could result in loss of browser connectivity to the current URL. If you change the IP address of the server, you need
to change the IP address in your browser before accessing the conguration web page again. IP address of the transmitter should be compatible with the
available LAN IP addresses.
Figure 9. Server Network conguration Menu
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SNMP Conguration
A SNMP conguration page is available as shown in the picture below:
Figure 10. SNMP Conguration Menu
The SNMP conguration menu allows to input the IP address of trap receiver and to change, enable and disable the trap community strings.
Host IP used to set the IP address of the computer with running management system, which receives the SNMP TRAP.
Parameters Read Community, Write Community, Trap Community are used for the SNMP exchange authenticity.
After modifying the values press the button “Save Cong” to reboot the server and update the entered parameters.
Transmitter control
When the device completes start-up, operation will begin and the Control screen will appear as in Figure 11.
Parameters of the transmitter can be selected by selecting different menu items in the control page.
Figure 11. Transmitter control page
• Attenuator parameter enables to decrease or to increase RF attenuator values (0…15 dB, 1 dB step).
Note: Attenuator value may be changed step by step using Up/Down buttons at right side of parameter window or entered directly from keyboard. Take
in mind that some browsers (e.g. IE) don’t support Up/Down control element. In this case the appropriate value should be entered from keyboard.
• Gain control allows to switch “On” or “Off” the AGC of the transmitter. It is used to set automatic RF level control for constant load to the laser. The
operating AGC level is set by the user when the button “Apply settings” is pressed. After that, RF level instability is compensated automatically by the
internal attenuator. If attenuator can’t compensate RF level drift, diagnostic error message “AGC out of range” is displayed.
• “RF in” DC voltage enables to switch DC voltage on RF input socket to OFF (0 V) or ON: (+12 V). This voltage is used for powering external active
devices (for example antenna preamplier) via coaxial cable.
After any control values are changed, press the button “Apply settings”.
Note: DC on “RF input” socket (+12 V) can be dangerous for some devices.
To avoid mistakes when installing or operating the transmitter without external preampliers, it is recommended to use the DC voltage blocking coupler
(VBC). VBC protects test equipment, splitters, couplers, in-line attenuators and other equipment from damage.
Transmitter Status
Status page (Figure 12) shows actual status of the transmitter using error/warning descriptions.
Make sure that the transmitter is not indicating any error or warning.
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Figure 12. Transmitter status page
• RF Level
The transmitter has a built-in RF power meter, which monitors the total power in the RF test point. This value directly relates to the laser optical modulation
index (OMI). It depends on input signals values and number of channels and can be changed by the attenuator.
If RF output power is less than -20 dBm, web server generates error message “Low RF level”, if it is more than -5 dBm, then the message” High RF
level” is displayed.
Note: measurement of RF output level has not instrument accuracy, it indicates the approximate output level power and output level variation.
• Laser 1 current
Indicates current of Laser 1;
• Laser 2 current (for transmitter mo428L)
Indicates current of Laser 2;
• Bus Voltage
Displays supply voltage of device on power distribution bus or on +12 V powering input (Figure 1, Pos. 9)
• Internal voltage
Indicates voltage of internal 5V supply
• “RF in” DC voltage
Displays the level of output voltage in the RF input socket (Figure 1, Pos. 1)
This voltage is used to power an external amplier. In case of short circuit, or over current the voltage drops, and error message “Voltage out of range”
is displayed in the error message eld.
• Temperature
Indicates the internal temperature of the device. If the temperature inside the module achieves the maximum level, the error message “Overheat” is
displayed.
In case the transmitter data bus is connected to an external power supply UP412, additional information about power supply parameters is displayed.
External supply 1 UP412:
• Voltage
Displays the output voltage of power supply No1;
• Current
Displays the current consumption of power supply No1;
• Temperature
Displays the temperature inside the power supply No1.
External supply 2 UP412 :
• Voltage
Displays the output voltage of power supply No 2;
• Current
Displays the current consumption of power supply No 2;
• Temperature
Displays the temperature inside the power supply No 2.
Transmitter maintenance
System maintenance page (Figure 13) allows the restart and/or restore all default settings of device.
All operations will be executed by pressing the “Execute” button.
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Figure 13. Maintenance page
The transmitter is supplied with the following default settings:
Table 1. Default transmitter settings.
Parameter Value
Attenuator 0 dB
Gain Control AGC off
External Output voltage Off
Firmware upgrade
It is possible to update the server rmware by uploading it to the optical transmitter using the device server software upload menu as shown below.
Figure 14. Firmware upgrade of transmitter server
Note: The buttons are shown in different languages, depending on the actual Windows regional setting.
It is recommended to perform software upgrade by connecting the transmitter directly to PC.
SNMP and the Management Information Base
A Simple Network Management Protocol (SNMP) Management Information Base (MIB) is a hierarchically organized collection of information. MIB’s
consists of managed objects that are identied by object identiers (OIDs). Some attributes in the MIB are xed while others are dynamic values calculated
by the agent software running on the device.
Ethernet SNMP agent operates together with optical transmitter and provides remote diagnostics and control of the transmitter via Ethernet type network
using SNMP protocol.
The agent of transmitter can receive SNMP requests from a number of SNMP managers and can send traps to dedicated trap receiver.
The SNMP agent generates all alarms and events as SNMP traps (notications) if parameters of the transmitter exceed limits and/or abnormal situations
occur. These traps will be sent to trap manager, identied by host IP address. The SNMP agent generates traps containing an object ID (OID) that uniquely
identies the alarm. The traps also contain a date/time stamp that shows the date and time of the alarm.
The a network management system (NMS) can be implemented to enable a more sophisticated alarm management with alarm ltering, alarm
acknowledgement and automatic messaging through Emails or SMS etc.
The table 2 shows the notication type and the MIB object for each event notication.
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Table 2. Notication type and the MIB object
OID Alarm Description
30631.1.2.2.1 alarmInternalVoltage Internal 5V source voltage out of range
30631.1.2.2.2 alarmBusVoltage Supply bus voltage out of range
30631.1.2.2.3 alarmAgcRange AGC out of range
30631.1.2.2.4 alarmLowRf Input RF level low
30631.1.2.2.5 alarmHighRf Input RF level high (Overdrive)
30631.1.2.2.6 alarmOutVoltageRange External devices powering voltage out of range
30631.1.2.2.7 alarmOverTemperature Device overheated
30631.1.2.2.8 alarmLaser1Ageing Laser diode 1 ageing
30631.1.2.2.9 alarmLaser2Ageing Laser diode 2 ageing. Applicable only for mo428 type
30631.1.2.2.10 alarmExtSupply1 External supply 1 - attention required. The variable value bits represent the cause of alarm, as
30631.1.2.2.11 alarmExtSupply2 External supply 2 - attention required. The variable value bits represent the cause of alarm, as
It is possible to get transmitter diagnostic data and indications of parameters exceeding operating limits – alarms (Table 3).
Table 3. Alarm OID’s
OID Alarm Description
30631.1.2.2.1 alarmInternalVoltage Internal 5V source voltage out of range
30631.1.2.2.2 alarmBusVoltage Supply bus voltage out of range
30631.1.2.2.3 alarmAgcRange AGC out of range
30631.1.2.2.4 alarmLowRf Input RF level low
30631.1.2.2.5 alarmHighRf Input RF level high (Overdrive)
30631.1.2.2.6 alarmOutVoltageRange External devices powering voltage out of range
30631.1.2.2.7 alarmOverTemperature Device overheated
30631.1.2.2.8 alarmLaser1Ageing Laser diode 1 ageing
30631.1.2.2.9 alarmLaser2Ageing Laser diode 2 ageing. Applicable only for mo428 type
30631.1.2.2.10 alarmExtSupply1 External supply 1 - attention required. The variable value bits represent the cause of alarm, as
30631.1.2.2.11 alarmExtSupply2 External supply 2 - attention required. The variable value bits represent the cause of alarm, as
described below: bit 0 - Low output voltage bit 1 – High output voltage bit 2 - Current overload bit 3 -
High temperature
described below: bit 0 - Low output voltage; bit 1 - High output voltage; bit 2 - Current overload; bit
3 - High temperature
described below: bit 0 - Low output voltage bit 1 – High output voltage bit 2 - Current overload bit
3 - High temperature
described below: bit 0 - Low output voltage; bit 1 - High output voltage; bit 2 - Current overload;
bit 3 - High temperature
By means of SNMP protocol it is possible to get status parameters values of the transmitter (RF level, laser current, supply voltages, temperature inside
module) and parameters of the external power suppliers (Table 4).
Table 4. Status parameters
OID Status Description
30631.1.2.1.1 measRfLevel RF level. Represented in tenth of dB. as example, a value of -299 represents level of -29.9 dBm
30631.1.2.1.2 measLaser1Current “Laser 1 current, represented in mA.
30631.1.2.1.3 measLaser2Current Laser 2 current, represented in mA. Applicable only for mo428 type
30631.1.2.1.4 measSupplyVoltage “Power bus voltage in tenth of Volt. As example, a value of 121 represents voltage of 12.1 V.
30631.1.2.1.5 measIntVoltage Internal 5V source voltage in tenth of Volt. As example, a value of 51 represents voltage of 5.1 V
30631.1.2.1.6 measOutVoltage Output voltage for external devices powering in tenth of Volt. As example, a value of 121 represents
30631.1.2.1.7 measTempr Device temperature, represented in deg C.
30631.1.2.1.8 measExtVoltage1 1st External supply voltage in tenth of Volt. As example, a value of 121 represents voltage of 12.1 V.
30631.1.2.1.9 measExtCurrent1 1st External supply current in tenth of Ampere. As example, a value of 4 represents current of 0.4 A.
30631.1.2.1.10 measExtTempr1 1st External supply temperature, represented in deg C.
30631.1.2.1.11 measExtVoltage2 2nd External supply voltage in tenth of Volt. As example, a value of 121 represents voltage of 12.1 V.
30631.1.2.1.12 measExtCurrent2 2nd External supply current in tenth of Ampere. As example, a value of 4 represents current of 0.4 A.
30631.1.2.1.13 measExtTempr2 2nd External supply temperature, represented in deg C.
User can sent SNMP request and get information of serial number and software version of transmitter (Table 5).
Table 5. Info parameters
OID Info Description
30631.1.2.5.1 infBaseSerNum Represents Base device Serial Number
30631.1.2.5.2 infBaseVersion Represents Base device rmware version number
Transmitter set includes CD with MIB les, which ensure binding of controlled parameters of the transmitter to the NMS.
voltage of 12.1 V.
Installation example
There is a recommended installation example when it is necessary to ensure a high reliability of optical system. For this purpose a power supply UP412
is recommended, as it is designed for operation in parallel connection to ensure the back-up function.
The server of transmitter has an additional useful feature to receive data from up to two UP412 power supplies. In this case the server of optical transmitter
works as a network element controller, which polls equipment that is connected to the data bus.
Therefore, the web browser allows supervising and controlling the function of the transmitter and power supply UP412.
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Note:
1. The server can manage only up to two UP412 devices.
2. Please pay attention to the different power supply settings. Address of power suppliers does not have to match and will be as follows:
Table 6. Address settings of power supply
Supply Group address Module address
No 1 1 1
No 2 1 2
In order to enable the communication of an UP412 power supply with a device server of optical transmitter, the data bus connector of the UP412 has
to be connected to the data bus connector of the transmitter (Figure 1, pos 7), as shown in the diagram below. The data and power distribution cables are
supplied together with the optical transmitter.
Figure 15. Application diagram of mo418L installation with redundant power supply and WEB/SNMP control possibility.
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Table 7. Technical characteristics
Type mo418L* mo428L*
Number of optical outputs 1 2
Optical power 1x6 dBm 2x6 dBm
Optical wave lenght 1310 ± 10 nm 1550 ± 3 nm 1310 ± 10 nm 1550 ± 3 nm
Laser type DFB
RF frequency range 47-2400 MHz
RF input level 70-85 dBµV
RF input impedance 75 Ω
Gain adjustment 0...-15 dB by 1 dB step
AGC range ± 5 dB
RF input loop through frequency range 47-2400 MHz
loss < 1 dB
atness ± 1.0 dB
Return loss ≥ 18 dB at 40 MHz -1.5 dB/oct (47-950 MHz); ≥ 10 dB up to 1750 MHz; ≥ 7 dB up to 2400 MHz
Relative intensity noise RIN < -150 dB/Hz
Terr.TV intermodulation distortion CSO** > 60 dB > 55 dB > 60 dB > 55 dB
intermodulation distortion CTB** > 62 dB > 60 dB > 62 dB > 60 dB
carrier/noise ratio C/N** > 51 dB > 50 dB > 51 dB > 50 dB
SAT IF intermodulation distortions IMD3*** > 35 dB
Test point**** 8.0 ± 1.0 dB (47-1750 MHz); 6.5 ± 1.5 dB (1750-2400 MHz)
Optical connector SC/APC
Network server Ethernet standard 10/100 Base-T
parameters connector RJ-45
supported protocols ARP, Ipv4, HTTP, Ping, SNMPv2c
Supply voltage 12 V ± 1 V
DC feeding for external 12 V 0.4 A
Current consumption***** 0.37 A max. 0.42 A max.
Operating temperature range 0o ÷ + 50o C
Dimensions/Weight (packed) 198x107.5x36 mm/ 0.9 kg
* Type Laser
mo418L 4D31 6 dBm DFB 1310 nm
mo418L 4D55 6 dBm DFB 1550 nm
mo428L 4D31 2x6 dBm DFB 1310 nm
mo428L 4D55 2x6 dBm DFB 1550 nm
** measurement conditions according EN 60728-3, 42 CENELEC: optical modulation index (OMI) 4.0 %;
the sticker “RF test level” with the exact RF level dBµV/chan for OMI=4.0% is placed on the side of the cover
*** two tone test metod according EN 60728-3 OMI 20 %
**** relative to RF IN port with 0 dB attenuator and off AGC
***** without external DC feeding
INVISIBLE LASER RADIATION DO NOT VIEW DIRECTLY WITH OPTICAL INSTRUMENTS.
Wave length 1270-1610 nm, IEC60825-1:2007
This product complies with the relevant clauses of the European Directive 2002/96/EC. The unit must be recycled or discarded
according to applicable local and national regulations.
Equipment intended for indoor usage only.
TERRA conrms, that this product is in accordance to following norms of EU: EMC norm EN50083-2, safety norm EN60065, RoHS norm EN50581.
TERRA conrms, that this product is in accordance with Custom Union Technical Regulations: “Electromagnetic compatibility of technical equipment“
CU TR 020/2011, “On safety of low-voltage equipment“ CU TR 004/2011.
TERRA conrms, that this product is in accordance with safety standard AS/NZS 60065 and EMC standards of Australia.
Draugystes str. 22, LT-51256 Kaunas, Lithuania, tel.: +370 37 - 31 34 44, fax: +370 37 - 31 35 55
E-mail: sales@terraelectronics.com, http://www.terraelectronics.com
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