User Manual - IRT Communications
Contents
1. gt 30dB at HD and SD NOTE Fitted with APD detector 3 18dB when fitted with PIN detector The IRT DDT 4620 and DDR 4620 are transmit and receive modules designed principally for use as a serial data fibre optic transmission link for 3G SDI HD SDI or SD SDI applications conforming to SMPTE standards 424M 292M and 259M using 9 125 um single mode fibre This enables the use of space saving fibre optic cable for reliable transmission of digital video signals over lengths greater than can be achieved with coaxial cable In addition the link may be used for ASI transport streams for use with MPEG compressed video streams or other 270 Mb s type data The transmitter features automatic input cable equalisation The unit can be configured with lasers of various wavelengths LED indicators are provided for digital signal presence DC power and LASER output power out of range A link selectable keep link alive signal is available to maintain optical link operation when no electrical input is present The receiver uses a choice of either a PIN photodiode or APD detector with signal conditioning and reclocking circuits The data rate is automatically set to match the 3G SDI HD SDI or SD SDI rates dependent on the actual input data rate to the transmitter Two serial digital outputs are provided LED indicators are provided for digital signal presence signal type optical loss and power Relay contact outputs are also provided for exte2. by the rear assembly indicates the presence of a valid input signal Likewise front panel LEDs and a relay alarm also accessible by the rear assembly indicates when the laser module is ON or either fails or is automatically turned off on loss of input signal Link settings set whether the laser is permanently enabled or only enabled whilst a valid input signal is present If the laser is set for permanent operation on loss of an input signal a 54MHz oscillator is switched into the optical output so that the DDR 4620 still recognizes the optical link as being valid This 54MHz signal does not affect the signal reclocking detect circuitry of the DDR 4620 which is used in signal presence alarm indication on detection or absence of a valid 3G HD or SD signal Single mode optical cable is directly connected to the module at the rear of the unit Likewise the fibre connection at the far end of the fibre optic cable is directly connected to the rear of the receiver The system will operate with an optical path loss from 9dB to a maximum of 27dB for 3G SDI signals Typically gt 30dB for HD SD SDI signals when fitted with an APD detector and from 3dB to a maximum of 18dB when fitted with a PIN detector For path lengths lt 9dB optical loss when using an APD detector or lt 3dB optical loss when using a PIN detector an optical attenuator is recommended The length of fibre that this corresponds to depends on the fibre loss characteristics at the relev
3. delivery unless contrary conditions apply under a particular contract of supply For situations when No Fault Found for repairs a minimum charge of 1 hour s labour at IRT s current labour charge rate will apply whether the equipment is within the warranty period or not Equipment warranty is limited to faults attributable to defects in original design or manufacture Warranty on components shall be extended by IRT only to the extent obtainable from the component supplier Equipment return Before arranging service ensure that the fault is in the unit to be serviced and not in associated equipment If possible confirm this by substitution Before returning equipment contact should be made with IRT or your local agent to determine whether the equipment can be serviced in the field or should be returned for repair The equipment should be properly packed for return observing antistatic procedures The following information should accompany the unit to be returned A fault report should be included indicating the nature of the fault The operating conditions under which the fault initially occurred Any additional information which may be of assistance in fault location and remedy A contact name and telephone and fax numbers Details of payment method for items not covered by warranty Full return address For situations when No Fault Found for repairs a minimum charge of 1 hour s labour will apply whether the equipm
4. DDT 4620 amp DDR 4620 Thee ELECTRONICS User Manual IRT Electronics Pty Ltd www irtelectronics com Revision 04 DDT 4620 amp DDR 4620 3G HD SD SDI ASI FIBRE OPTIC LINK Revision History Revision Date By Change Description Applicable to 00 04 06 2010 AL Original Issue Serial numbers gt 1005001 01 04 01 2011 AL Comment about Keep Link Alive added to General Serial numbers Description and Configuration sections gt 1005001 02 20 04 2011 AL Reference to FP laser option removed Serial numbers gt 1005001 03 16 08 2011 AL Path loss specification updated Serial numbers gt 1108001 04 30 05 2012 AL Path loss specification updated Reformatted layout Serial numbers gt 1202001 IRT Electronics Pty Ltd www irtelectronics com Page 2 of 14 Revision 04 USER MANUAL Table of Contents DDT 4620 amp DDR 4620 Section Revision History Operational Safety General Description Technical Specifications Configuration Installation Signal Connections Front and rear layouts Operation Figure 1 Attenuation versus wavelength SNMP What Is It DDT 4620 amp DDR 4620 SNMP Functions Maintenance amp Storage Warranty amp Service Equipment return This instruction book applies to serial numbers gt 1202001 IRT Electronics Pty Ltd www irtelectronics com Page 3 of 14 v w ga o WOW COON DU BN PRPRPPRPR
5. PB BBB WRP OO Revision 04 DDT 4620 amp DDR 4620 OPERATIONAL SAFETY WARNING Operation of electronic equipment involves the use of voltages and currents that may be dangerous to human life Note that under certain conditions dangerous potentials may exist in some circuits when power controls are in the OFF position Maintenance personnel should observe all safety regulations Do not make any adjustments inside equipment with power ON unless proper precautions are observed All internal adjustments should only be made by suitably qualified personnel All operational adjustments are available externally without the need for removing covers or use of extender cards Optical Safety The light emitted from the LASER diode used in this system is invisible and may be harmful to the human eye Avoid looking directly into the fibre optic cable or connectors or into the collimated beam along their axis when the device is in operation Operating the LASER diode outside of its maximum ratings may cause device failure or a safety hazard Invisible LASER radiation Avoid direct exposure to beam Peak power 2 mW Wavelength 1270 1610nm Class 1 LASER Product IRT Electronics Pty Ltd www irtelectronics com Page 4 of 14 Revision 04 DDT 4620 amp DDR 4620 GENERAL DESCRIPTION BLOCK DIAGRAM DDT 4620 amp DDR 4620 SIGNAL PATH 3G SDI 3G SDI HD SDI HD SDI SD SDI SD SDI ASI ASI Fibre Link 9 27 dB path loss at 3G
6. accessories NOTE 2 DDT 4620 amp DDR 4620 2 97 Gb s 3G SDI to SMPTE 424M 1 485 Gb s HD SDI to SMPTE 292M 270 Mb s SD SDI to SMPTE 259M and DVB ASI 750 gt 15 dB 5 MHz to 1 5 GHz gt 10 dB 1 5 GHz to 2 97 GHz gt 100 m at 2 97 Gb s with Belden 1694A typ 130m gt 100 m at 1 485 Gb s with Belden 1694A typ 170m gt 250 m at 270 Mb s with Belden 8281 typ gt 300m 1 BNC on rear panel 2 data reclocked AC coupled 800 mV 10 750 gt 15 dB 5 MHz to 1 5 GHz gt 10 dB 1 5 GHz to 2 97 GHz lt 135 ps at 2 97 Gb s and 1 485 Gb s gt 0 4ns and lt 1 5 ns at 270 Mb s lt 0 3 UI at 2 97 Gb s reclocked lt 0 2 Ul at 1 485 Gb s reclocked lt 0 2 Ul at 270 Mb s reclocked typically lt 0 1 Ul 2 BNC on rear assembly 0 dBm 4 5 0 dB CWDM DFB laser APD detector 9 to 27 dBm input level at 3G SDI typically lt 30 dBm at HD SD SDI PIN detector 3 to 18 dBm input level CWDM DFB laser 1270nm 1290nm 1310nm 1330nm 1350nm 1410nm 1430nm 1450nm 1470nm 1490nm 1510nm 1530nm 1550nm 1570nm 1590nm amp 1610nm 9 to 27 dB at 3G SDI typically gt 30 dB at HD SD SDI APD detector 3 to 18 dB PIN detector Optical path loss Laser O P power Detector I P power Designed for use with 9 125 um single mode fibre SC PC standard 28 Vac CT 14 0 14 or 16 Vdc DDT 4620 lt 4 0 VA DDR 4620 lt 4 5 VA 0 50 C ambient For mounting in IRT 19 rack chassi
7. ant wavelength of the laser module chosen For example if the fibre loss characteristic of the chosen fibre is 0 2dB per kilometre at 1550 nm say then the maximum distance that can be run is 125 km 25dB 0 2dBkm although connector losses such as through patch leads etc should also be taken into consideration when calculating maximum distances Actual attenuation versus wavelength characteristics depends upon optic fibre manufacturer s own specifications The DDR 4620 receiver module accepts an input optical signal with a power level in the range of 9 dBm to 27 dBm for 3G SDI signals Typically lt 30dBm for HD SD SDI signals when fitted with an APD detector and 3 dB to 18 dB when fitted with a PIN detector A red LED Optical Loss indicator on the front panel and a relay alarm accessible by the rear assembly indicates when the optical path loss is approaching or has exceeded the maximum allowed The output of the DDR 4620 receiver is the same signal that was originally inputted to the DDT 4620 transmitter A front panel green LED and a relay alarm accessible by the rear assembly indicates the presence of a valid locked output signal Three other green LEDs indicate whether the received signal is a 3G SDI an HD SDI or an SD SDI type of signal 10 uy x S 1 2 w S IR absorption i Rayleigh scattering 0 1 1 M 800 1000 1200 1400 1600 Wavelength nm gt Figure 1 Attenuation versus wav
8. ed device An agent has local knowledge of management information and translates that information into a form compatible with SNMP The agent therefore acts as an interface between the NMS and the managed devices The NMS sends a request message and control commands for the managed devices to the agent which in turn sends a response message containing information about the managed devices back to the NMS A managed device contains an SNMP agent and resides on a managed network Managed devices collect and store management information and make this information available to NMS s using SNMP Managed device agent variables are organised in a tree structure known as a Management Information Base MIB Within the MIB are parameters pertaining to the managed device An Object Identifier OID number within the MIB defines the managed device type This is a unique number specific to the model of managed device Other information relating to the device is also stored information such as alarm states controllable settings etc The MIB tree is organised in such a way that there will be no two MIB files with conflicting placements Normally an NMS polls an agent for information relating to the M B in a managed device to be sent back to the NMS When certain conditions are met within the MIB such as major alarm conditions for example the agent automatically sends what is known as a trap to the NMS without any prompting from the NMS This allows automat
9. elength Attenuation in the fibre is due to Absorption and Scattering IRT Electronics Pty Ltd www irtelectronics com Page 10 of 14 Revision 04 DDT 4620 amp DDR 4620 SNMP What Is It SNMP stands for Simple Network Management Protocol It is an application layer protocol for managing IP Internet Protocol based systems SNMP enables system administrators to manage system performance and to find and solve system problems SNMP runs over UDP User Datagram Protocol which in turn runs over IP Three types of SNMP exist SNMP version 1 SNMPv1 SNMP version 2 SNMPv2 and SNMP version 3 SNMPv3 It is not the intention here to discuss the differences between various versions only to bring attention to the fact that IRT Electronics modules fitted with SNMP capability use SNMPv1 An SNMP managed network consists of three key components Network Management Systems NMS agents and managed devices An NMS is the console through which the network administrator performs network management functions such as monitoring status e g alarm states and remote controlling of a set of managed devices One or more NMS s must exist on any managed network Generally the NMS is a computer running third party SNMP control software There are a number of third party SNMP software applications currently available on the market An NMS polls or communicates with an agent An agent is a network management software module that resides in a manag
10. ent is within the warranty period or not Contact IRT for current hourly rate pol OOP a GaN gt Please note that all freight charges are the responsibility of the customer The equipment should be returned to the agent who originally supplied the equipment or where this is not possible to IRT directly Details of IRT s direct address can be found at IRT Electronics website Web address www irtelectronics com Email sales irtelectronics com IRT Electronics Pty Ltd www irtelectronics com Page 14 of 14 Revision 04
11. ic notification of a predetermined event SNMP Block Diagram SNMP Agent SNMP Agent Protocol Engine SNMP Agent SNMP Agent Protocol Engine SNMP Agent SNMP Agent Protocol Engine IRT Electronics Pty Ltd www irtelectronics com Page 11 of 14 Revision 04 DDT 4620 amp DDR 4620 SNMP with IRT Products IRT Electronics currently employs SNMPv1 with its SNMP capable frames The frame acts as an agent when fitted with a CDM xxxx module This module has its own designated slot next to the power supply so as to not affect the number of modules that the frame will take Communication between the NMS the frame and its loaded modules are via this CDM xxxx module Note that the NMS software is third party and not supplied by IRT Electronics Ethernet connection for SNMP operation is via an RJ45 connector on the rear of the frame below the mains inlet Ethernet rate runs at either 10 baseT or 100 baseT Frame parameters such as Name Address and Location are set via an RS232 interface a D9 connector on the rear of the frame below the mains inlet A software terminal emulator such as Tera Term or HyperTerminal is used for setting and reading the parameters of the frame IRT modules that are SNMP compatible need a plug in SMU 4000 module with a program relevant to the module that it is plugged into Depending on the module besides the module identification parameters such as alarm states inputs and controls etc are commun
12. icated to the CDM xxxx agent via a data bus on the rear of the frame Thus the CDM xxxx collects information on what is loaded within the frame what positions they occupy and their current status for communication to the NMS when the NMS sends a request for information In the event of a major alarm from any of the SNMP compatible modules or power supplies a trap is automatically sent by the CDM xxxx agent to the NMS without any prompting by the NMS This alerts the operator to any fault conditions that may exist that need immediate attention O O L D FRU 4000 110 240 V 50 60 Hz FRAME 0 7 A max im RS232 2 oye D Alarm AS3260 approval no CS6346N Ass no 804692 7 O O IRT SNMP Connections IRT modules fitted CDM xxxx with SMU 4000 PSU s Se SS IRT SNMP Frame Ethernet Cable Ethernet Cable IRT modules fitted CDM with SMU 4000 oe el IRT SNMP Frame Ethernet Cable IRT SNMP Setup IRT Electronics Pty Ltd www irtelectronics com Page 12 of 14 Revision 04 DDT 4620 amp DDR 4620 SNMP Functions With the DDT 4620 DDR 4620 fitted with the optional plug in SMU 4000 SNMP module programmed to suit and installed in an IRT frame with SNMP capability these can be interrogated by an SNMP Network Management System NMS The following SNMP functions are capable of being monitored by an NMS DDT 4620 irt4620Sig
13. is always enabled keep link alive whether input signal is present or not default position Auto Laser laser is enabled only when an input signal is present DIP puna swi 1234567 8 Not used Output muted when signal absent default position Output always enabled Reclocker bypassed when signal not locked default position Reclocker bypassed Output amplitude standard 800mvV default position Output amplitude 1000mV Output slew rate limited when 270 Mb s signal default position Output slew rate not limited Not used Enable major and minor SNMP alarms to the frame Agent CDM card Disable major and minor SNMP alarms to the frame Agent CDM card Not used NOTE 3 When using TRAPS via SNMP depending on how system is set up in order to avoid double reporting of alarms via the DDT 4620 and DDR 4620 cards themselves and the CDM card SNMP Agent of the frame major and minor SNMP alarms that are reported to the CDM card of the frame can be disabled IRT Electronics Pty Ltd www irtelectronics com Page 7 of 14 Revision 04 DDT 4620 amp DDR 4620 INSTALLATION Pre installation Handling This equipment may contain or be connected to static sensitive devices and proper static free handling precautions should be observed Where individual circuit cards are stored they should be placed in antistatic bags Proper antistatic procedures should be followed when inserting or removing cards f
14. nal An indication that an input signal is present notPresent 1 present 2 irt46200ptical An indication that the laser is functioning correctly LaserOkay 1 LaserFail 2 irt4620Reset Unit reset control A set with a value of 2 sent to this OID will cause a system reset to occur When queried returns a 1 irt4620AlarmSource Set and read which conditions may cause Traps optical 1 signal 2 opticalAndSignal 3 none 4 NOTE 4 Trap will be sent depending on setting of irt4620AlarmSource field on loss of parameter For example loss of input signal when signal 2 setting is selected Upon restoration of signal a Trap will also be sent to indicate that alarm condition has cleared With irt4620AlarmSource field set to none 4 Trap indication is disabled DDR 4620 irt4620Signal An indication of signal presence and rate noValidSignal 1 presentSD 2 presentHD 3 present3G 4 irt46200ptical An indication that that there is an optical input noOpticalSignal 1 opticalSignalPresent 2 irt4620ReclockerBypass Set and read the state of the Reclocker Bypass control reclocking 1 bypassed 2 irt4620fpgaVersion The firmware version of the FPGA in the format x y where x is the major revision number and y the minor irt4620snmpVersion The software version of the SMU in the format x y where x is the major revision number and y the minor irt4620Reset U
15. nit reset control A set with a value of 2 sent to this OID will cause a system reset to occur When queried returns a 1 irt4620AlarmSource An indication of alarm state conditions none 1 optical 2 signal 3 opticalAndSignal 4 irt4620TrapEnable Enable or Disable Traps to be sent when the alarm source condition changes notEnable 1 enabled 2 NOTE 5 Onboard DIP switch SW1 3 ON Reclocker Bypassed position overrides the reclocking 1 SNMP set function IRT Electronics Pty Ltd www irtelectronics com Page 13 of 14 Revision 04 DDT 4620 amp DDR 4620 MAINTENANCE amp STORAGE Maintenance No regular maintenance is required Care however should be taken to ensure that all connectors are kept clean and free from contamination of any kind This is especially important in fibre optic equipment where cleanliness of optical connections is critical to performance Storage If the equipment is not to be used for an extended period it is recommended the whole unit be placed in a sealed plastic bag to prevent dust contamination In areas of high humidity a suitably sized bag of silica gel should be included to deter corrosion Where individual circuit cards are stored they should be placed in antistatic bags Proper antistatic procedures should be followed when inserting or removing cards from these bags WARRANTY amp SERVICE Equipment is covered by a limited warranty period of three years from date of first
16. rnal use of alarm signals on both modules An optional SNMP Simple Network Management Protocol plug in module is available for each unit for remote monitoring when used in conjunction with an IRT frame fitted with SNMP capability Both the DDT 4620 and DDR 4620 are Eurocard modules designed to fit IRT s current range of 1RU 1000 series and 3RU 4000 series Eurocard frames Standard features One type covers 2 97 Gb s 3G SDI 1 485 Gb s HD SDI or 270 Mb s SD SDI amp ASI signals Path lengths up to 30 dB optical path loss using 9 125um single mode fibre LED indicators and external alarm contacts Fibre video and alarm connections at rear Optional plug in SNMP monitoring module NOTE 1 27dB path loss at 3G gt 30dB path loss at HD and SD Fitted with APD detector IRT Electronics Pty Ltd www irtelectronics com Page 5 of 14 Revision 04 TECHNICAL SPECIFICATIONS DDT 4620 Input serial data signal Input impedance Input return loss Automatic Cable compensation Input Connector DDR 4620 Number of outputs Output level Output impedance Output return loss Output Rise and Fall Time Intrinsic Jitter Output Connector Optical DDT 4620 optical output DDR 4620 optical input Available wavelengths Optical path loss Optical fibre Optical connectors Power Requirements Voltage Power consumption Other Temperature range Mechanical Finish Front panel Rear assembly Dimensions Optional
17. rom these bags Power AC mains supply Ensure that operating voltage of unit and local supply voltage match and that correct rating fuse is installed for local supply DC supply Ensure that the correct polarity is observed and that DC supply voltage is maintained within the operating range specified Earthing The earth path is dependent on the type of frame selected In every case particular care should be taken to ensure that the frame is connected to earth for safety reasons See frame manual for details Signal earth For safety reasons a connection is made between signal earth and chassis earth No attempt should be made to break this connection Installation in frame or chassis See details in separate manual for selected frame type Signal Connections The DDT 4620 and DDR 4620 are set up to automatically operate at either 2 97 Gb s 3G 1 485 Gb s HD or 270 Mb s SD signals and do not require any adjustment prior to use with the exception of link and DIP switch options described in the Configuration section of this manual There are no external controls on the front panel of the units Optical connections are made to the panel adapter mounted on a bracket at the rear of the modules Care must be taken to provide a clean surface on the optical connectors and in inserting the plug on the external fibre to prevent damage to the alignment ferrule of the panel adapter Type of fibre used must be single mode type The serial digital
18. s with input output and power connections on the rear panel Grey background black lettering amp red IRT logo Detachable silk screened PCB with direct mount connectors to Eurocard and external signals 6 HP x 3 Ux 220 mm IRT Eurocard SMU 4000 SNMP plug in module for use with 4000 series frame fitted with SNMP Agent Typical values based using DFB laser Optical attenuator supplied for DDR 4620 when optical path loss is less than 3dB for PIN detector and 9dB for APD detector Due to our policy of continuing development these specifications are subject to change without notice IRT Electronics Pty Ltd www irtelectronics com Page 6 of 14 Revision 04 CONFIGURATION DDT 4620 amp DDR 4620 Other than the following link settings there are no user configurable settings All other potentiometer and link settings are factory set and should not be moved User link and DIP switch settings DDT 4620 LKI OUT LK2 OUT LK3 1 2 DDR 4620 SW1 1 SW1 2 OFF ON SW1 3 OFF ON SW1 4 OFF ON SW1 5 OFF ON SW1 6 SW1 7 OFF ON SW1 8 Input equalization at maximum sensitivity Reduces the input equalization sensitivity for use in noisy environments or when a short input cable is used Compensation limited to about 80 metres with Belden 1694A Enable major and minor SNMP alarms to the frame Agent CDM card Disable major and minor SNMP alarms to the frame Agent CDM card Enable Laser laser
19. signal connections are made to the BNC connectors on the rear panels The external alarm contact connections are made to the 4 pin phoenix style connector at the bottom of the rear assembly On an alarm condition relay contacts go open circuit that is switch open with respect to ground The connections being DDT 4620 DDR 4620 4 OPEN not used 4 OPEN not used 3 LASER FAIL LASER OFF 3 OPTICAL LOW OPTICAL LOSS DIGITAL SIGNAL LOSS 2 DIGITAL SIGNAL LOSS 1 GND 1 GND N IRT Electronics Pty Ltd www irtelectronics com Page 8 of 14 Revision 04 DDT 4620 amp DDR 4620 Front amp rear panel connector diagrams i S W DDR 4620 DDT 4620 IRT IRT LOCKED SIGNAL PRESENT senal LASER ATS 3G HD SD pc pc CAUTION CAUTION Direct Direct connections to module connections to module Gv B O o IRT Electronics Pty Ltd www irtelectronics com Page 9 of 14 Revision 04 DDT 4620 amp DDR 4620 OPERATION The DDT 4620 and DDR 4620 are automatically set up to operate at either 2 97 Gb s 3G SDI 1 485 Gb s HD SDI or 270 Mb s SD SDI or ASI and do not require any adjustments prior to use A 2 97 Gb s 3G SDI signal or 1 485 Gb s HD SDI signal or a 270 Mb s type of signal such as ASI or SDI is connected to a 75 Q BNC connector on the rear assembly of the DDT 4620 fibre optic transmitter A front panel LED and a relay alarm accessible
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