User Manual - IRT Communications
Contents
1. The IRT DDT 4630 and DDR 4630 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 C 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 failure A link selectable keep link alive signal is available to maintain optical link operation when no electrical input is present Two inputs are provided with automatic changeover to input 2 on loss of input 1 for input signal redundancy 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 external2. Present Signal is either an 3G SDI signal or at 2 97 Gb s rate notPresent No signal is present Control of the signal data rate setting 1 2 3 4 5 sdi3G HD SD ASI Reclocker set to 3G SDI HD SDI or SD SDI ASI rates sdiHD SD ASl only Reclocker set to HD SDI 1 485 Gb s and SD SDI ASI 270 Mb s rates only sdiSD ASl only Reclocker set to SD SDI ASI 270 Mb s rate only bypassed Reclocker bypassed to allow other signal rates through na Not Applicable If selected defaults to 3G HD SD SDI ASI rate setting An indication and control of how and whether the channel is enabled 1 2 3 4 5 notEnabled The electrical output signal is not enabled enabledActive Electrical signal is both Enabled and Active enabledMuted Electrical signal is Enabled but the output is Muted when no signal is present or the wrong data rate has been applied enabledChangedOver Not Applicable If selected defaults to current applicable enabled setting na Not Applicable If selected defaults to current applicable enabled setting 16 character maximum Alias name for the input signals can be read and set A line spacing within the table to make reading the table easier Applicable to DDT 4630 only See explanation for DDT 4630 SNMP function 3 na Not Applicable IRT Electronics Pty Ltd www irtelectronics com Page 17 of 19 Revision 00 DDT 4630 amp DDR 4630 chanPresTrapEnable E
3. of first 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 t
4. rates can be sent and received If the data rate does not match that of 3G SDI HD SDI or SD SDI all front panel signal data rate LED s will flash to indicate that an unknown data rate has been detected Likewise an unknownPresent data rate is reported via SNMP Through the use of SNMP see separate section of manual it is possible to remotely monitor and control various functions not available via the local DIP switch control Such as for example it is possible to disable the channel on either or both the DDT 4630 and DDR 4630 locking out an end user s functionality should this be desired When a signal Tx or Rx has been disabled should an electrical signal be present the corresponding data rate LED will flash not to be confused with situation as described in Front Panel LED Indicators section below IRT Electronics Pty Ltd www irtelectronics com Page 11 of 19 Revision 00 DDT 4630 amp DDR 4630 gt IR absorption Attenuation dB km Rayleigh scattering 1 800 1000 1200 1400 1600 Wavelength nm Figure 1 Attenuation versus wavelength Attenuation in the fibre is due to Absorption and Scattering Front Panel LED Indicators If the Tx or Rx input signal rate does not match the set rate or the secondary input rate is not the same as the primary input rate even though its rate is compatible with the set rate the corresponding LED will flash SZ sD HD In this example the DDT 4630 transmit
5. version of the microcontroller in the format x y where x is the major revision number and y the minor reset Unit reset control 1 normal when queried reset control returns a normal state 2 reset system reset causes sysUpTime counter to reset NOTE 6 Typically gt 20dB at HD SD SDI rates Optical attenuator required for optical input levels gt 3dBm 7 Typically gt 30dB at HD SD SDI rates Optical attenuator required for optical input levels gt 9dBm IRT Electronics Pty Ltd www irtelectronics com Page 18 of 19 Revision 00 DDT 4630 amp DDR 4630 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
6. when no input signal is present Auto Laser laser is enabled only when an input signal is present Enable automatic input changeover on loss of primary input IN 1 to Tx IN 1 takes priority over IN 2 Disable automatic input changeover DIP switch control SNMP control Enable major and minor SNMP alarms to the frame Agent CDM card Disable major and minor SNMP alarms to the frame Agent CDM card DIP Switch Rx Output Rate SW1 1 SW1 2 3G HD SD Auto detect OFF OFF SD only ON OFF HD and SD only OFF ON Bypass Reclocker ON ON Not used Not used Not used Not used DIP switch control SNMP control Enable major and minor SNMP alarms to the frame Agent CDM card Disable major and minor SNMP alarms to the frame Agent CDM card When using TRAPS via SNMP depending on how system is set up in order to avoid double reporting of alarms via the DDT 4630 or DDR 4630 card 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 19 Revision 00 DDT 4630 amp DDR 4630 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 P
7. 0 14 or 16 Vdc DDT 4630 lt 5 0 VA DDR 4630 lt 5 0 VA 0 50 C ambient For mounting in IRT 19 rack chassis with input output and power connections on the rear panel Grey black lettering amp red IRT logo Detachable silk screened PCB with direct mount connectors to Eurocard and external signals 6 HP x 3 U x 220 mm IRT Eurocard Typical values based using DFB laser Optical attenuator required for DDR 4630 when detector input is greater than 3dBm for PIN detector and 9dBm 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 19 Revision 00 CONFIGURATION DDT 4630 amp DDR 4630 User DIP switch settings DDT 4630 SW1 3 SW1 4 SW1 5 SW1 6 SW1 7 SW1 8 DDR 4630 SW1 3 SW1 4 SW1 5 SW1 6 SW1 7 SW1 8 NOTE OFF ON OFF ON OFF ON OFF ON OFF ON OFF ON OFF ON SW1 DIP kauaka 12345678 DIP Switch Tx Input Rate SW1 1 SW1 2 3G HD SD Auto detect OFF OFF SD only ON OFF HD and SD only OFF ON Bypass Reclocker ON ON BNC outputs OUT 1 and OUT 2 monitor the signal IN1 or IN2 being fed to the optical output BNC outputs OUT 1 and OUT 2 monitor the signal inputs IN1 and IN2 OUT 1 IN 1 and OUT 2 IN2 Not used Enable Laser laser is always enabled keep link alive signal
8. 75 Q 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 3G SDI with Belden 1694A typ 110m gt 100 m at 1 485 Gb s HD SDI with Belden 1694A typ 160m gt 250 m at 270 Mb s SD SDI ASI with Belden 8281 typ gt 300m 2 x BNC on rear panel with 1 P 1 taking priority amp I P 2 automatically switching in on loss of I P 1 2 x BNC on rear panel monitor outputs 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 4 ns and lt 1 5 ns at 270 Mb s lt 0 3 Ul at 2 97 Gb s reclocked lt 0 2 Ul at 1 485 Gb s reclocked lt 0 1 Ul at 270 Mb s reclocked 2 x BNC on rear assembly 0 dBm 4 5 0 dB CWDM DEB 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 at 3G SDI typically lt 20 dBm at HD SD SDI CWDM DFB laser 1270nm 1290nm 1310nm standard 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 at 3G SDI typically gt 20 dB at HD SD SDI PIN detector Optical path loss Laser O P power Detector 1 P power Designed for use with 9 125 um single mode fibre 1 x SC PC standard on rear direct connection to main card 28 Vac CT 14
9. DDT 4630 amp DDR 4630 INT ELECTRONICS User Manual IRT Electronics Pty Ltd www irtelectronics com Revision 00 3G HD SD SDI ASI FIBRE OPTIC LINK Revision History DDT 4630 amp DDR 4630 Revision Date By Change Description Applicable to 00 19 06 2013 AL Original Issue Units fitted with firmware version gt Dxx463xS1V3 IRT Electronics Pty Ltd www irtelectronics com Page 2 of 19 Revision 00 USER MANUAL Table of Contents Section Revision History Operational Safety General Description Technical Specifications Configuration User DIP switch settings DDT 4630 DDR 4630 Installation Signal Connections DDT 4630 DDR 4630 Optical Connections Alarm Connections DDT 4630 DDR 4630 Front and rear layouts Operation Figure 1 Attenuation versus wavelength Front Panel LED Indicators SD only HD SD only modes SNMP What Is It DDT 4630 amp DDR 4630 SNMP Functions DDT 4630 DDR 4630 Maintenance amp Storage Warranty amp Service DDT 4630 amp DDR 4630 v w ga o O O DO 00 0 NN MN NN NN DU HPN PRPRPPRPRPRPRPPHP RB COON UUWNNNBO This instruction book applies to units fitted with firmware version gt Dxx463xS1V3 IRT Electronics Pty Ltd www irtelectronics com Page 3 of 19 Revision 00 DDT 4630 amp DDR 4630 OPERATIONAL SAFETY WARNING Operation of electronic equipment involve
10. Hours Minutes and Seconds 16 character writable system name Default set name DDR 4630 An indication of the device type 4 ddr4630 Receiver An indication of the alarm type 1 2 7 noAlarm No alarms present urgent 1 Optical input is absent nonUrgent 1 Optical input is low or received electrical signal is absent or invalid The current configuration setting s source as determined by DIP switch SW1 7 position 1 2 3 pcbSwitches Configuration set locally via on board DIP switches SW1 7 OFF remoteSNMP Configuration set remotely via SNMP SW1 7 ON lockToRemoteSNMP Lock module to SNMP control overrides SW1 7 position Note that SW1 7 must be initially ON to be able to set to Lock to SNMP mode To release send either a 1 or 2 Applicable to DDT 4630 only See explanation for DDT 4630 SNMP function 3 na Not applicable Setting this parameter has the same effect as disabled Information and control of the DDT 4630 in table form Table data entry An indication of the channel designator 4 ch Rx Optical Receiver settings column designator An indication of the signal rate present within the received optical signal 1 unknownPresent Signal rate is not one of the 3G HD SD SDI ASI rates sdiSD ASI Present Signal is either an SD SDI or ASI signal or at 270 Mb s rate sdiHD Present Signal is either an HD SDI signal or at 1 485 Gb s rate sdi3G
11. IN detector An orange LED indicator on the front panel LASER in the case of the DDT 4630 and OPTICAL in the case of the DDR 4630 and a relay alarm accessible by the rear assembly indicates when a laser failure has occurred in the case of the DDT 4630 or the optical path loss is approaching or has exceeded the maximum allowed in the case of the DDR 4630 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 required The length of fibre that this corresponds to depends on the fibre loss characteristics at the relevant 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 135 km 27dB 0 2dBkm although connector losses such as through patch lead connectors etc should also be taken into consideration when calculating maximum distances Actual attenuation versus wavelength characteristics depends upon optic fibre manufacturer s own specifications Also a few dB headroom is recommended to allow for the effects of laser aging over time The output of the DDR 4630 receiver is the same signal that was originally inputted to the opposite DDT 4630 transmitter Front panel green LEDs indicate the presence of a valid locked 3G SDI HD SDI or an SD SDI type of output signal In the reclocker bypass mode rates other than the 3G HD SD SDI
12. RU 4000 110 240 V 50 60 Hz FRAME 0 7 A max im RS232 Y KS Alarm AS3260 approval no CS6346N Ass no 804692 O O IRT SNMP Connections IRT modules fitted CDM xxxx with SMU 4000 PSU s ee ee IRT SNMP Frame Eth l Ethernet Cable thernet Cable IRT modules fitted CDM xxxx with SMU 4000 PSU s a IRT SNMP Frame Ethernet Cable IRT SNMP Setup IRT Electronics Pty Ltd www irtelectronics com Page 14 of 19 Revision 00 DDT 4630 amp DDR 4630 DDT 4630 amp DDR 4630 SNMP Functions When installed in an IRT frame fitted with SNMP capability the DDT 4630 and DDR 4630 can be interrogated by an SNMP Network Management System NMS The DDT 4630 and DDR 4630 belong to a series of fibre products that share a common framework and object identifier number OID when doing an SNMP walk via the NMS the reported identifier in the slot position list is reported as being irtDxx463x where the x signifies a wildcard character in this case a D T R and O as in the DDT 4630 amp DDR 4630 product numbers The specific product type and details are revealed when expanding this identifier The following SNMP functions are capable of being monitored by an NMS for SNMP control DIP switch SW1 7 must be set to ON DDT 4630 sysDescr sysObjectID sysUpTime sysName irt463xType alarms ctriMo
13. 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 managed 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 usin
14. d is set for the 3G rate which has a lower optical path loss than the HD and SD rates If operating at signal paths close to the DDR 4630 recommended maximum specified threshold signal analysis should be performed to check the accuracy of the received signal if the OPTICAL LED is illuminated SD only HD SD only modes Note that it is possible to set the units to operate as an SD rate only or HD SD rate only mode by use of the DIP switch configuration controls However in situations where it is desired that the end user does not have control over the intended setup it is possible to set the unit to the desired rate via SNMP control and to lock it to SNMP only control so that the end user cannot override the setup parameters by use of the DIP switches This is intended for situations where a link has been leased to a customer who is only paying for a certain data rate path such as SD only or HD SD only as opposed to the full 3G rate IRT Electronics Pty Ltd www irtelectronics com Page 12 of 19 Revision 00 DDT 4630 amp DDR 4630 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
15. d on a bracket at the rear of the module 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 Note that for path lengths lt 9 dB for APD detectors or lt 3 dB for PIN detectors an optical attenuator must be used to avoid over driving the DDR 4630 detector Alarm Connections The external alarm contact connections are made to the 4 pin phoenix style connector on the rear assembly On an alarm condition relay contacts go open circuit that is switch open with respect to ground The connections being 1 GND 2 GND 3 Major Alarm 4 Minor Alarm The alarms reported are designated as either Major or Minor DDT 4630 A Major alarm is designated as a laser fail alarm A Minor alarm is designated as an input is missing invalid or not enabled Note that if automatic changeover mode is disabled the alarm condition for IN 2 is ignored regardless of its state DDR 4630 A Major alarm is designated as an optical input fail to the detector A Minor alarm is designated as the signal output is missing invalid or not enabled OR the optic input level has been deemed to be approaching or has gone below its threshold limit NOTE 4 Itis possible via SNMP to disable signal channel on both the DDT 4630 and DDR 4630 5 _ This is re
16. de autoChangeOver channelinfoTable channelinfoEntry channelDesignator inputStatus description of the unit Optical Transmitter Object identifier irtDDT4630 A indication of how long the unit has been running since its last power on or reset in Days Hours Minutes and Seconds 16 character writable system name Default set name DDT 4630 An indication of the device type 3 ddt4630 Transmitter An indication of the alarm type 1 2 7 8 9 noAlarm No alarms present urgent 1 Optical laser is faulty nonUrgent 1 Input signal IN 1 is absent or invalid nonUrgent 2 Input signal IN 2 is absent or invalid Not applicable if automatic changeover mode is disabled nonUrgent 1 2 Both nonUrgent 1 and nonUrgent 2 alarms are present The current configuration setting s source as determined by DIP switch SW1 7 position 1 2 3 pcbSwitches Configuration set locally via on board DIP switches SW1 7 OFF remoteSNMP Configuration set remotely via SNMP SW1 7 ON lockToRemoteSNMP Lock module to SNMP control overrides SW1 7 position Note that SW1 7 must be initially ON to be able to set to Lock to SNMP mode To release send either a 1 or 2 Enable or Disable Automatic Changeover to switch Tx optical output from primary In 1 to secondary IN 2 input on loss of valid primary input if secondary input is both present and valid 1 disab
17. f a valid input to IN1 Upon restoration of a valid signal to the IN 1 port the optical transmitter automatically restores back to the signal on the IN 1 port With SW1 6 ON automatic changeover is disabled and although IN 2 is still monitored it is essentially ignored as far as the laser output is concerned With DIP switch SW1 3 OFF the OUT 1 and OUT 2 BNC connectors act as monitor ports for the transmitter output It will monitor either the IN 1 or IN 2 input depending on which input is actually feeding the optical laser With DIP switch SW1 3 ON the OUT 1 and OUT 2 BNC connectors act as respective monitor ports for both the IN 1 and IN 2 inputs OUT 1 monitors the IN 1 port and OUT 2 monitors the IN 2 port IRT Electronics Pty Ltd www irtelectronics com Page 8 of 19 Revision 00 DDT 4630 amp DDR 4630 DDR 4630 The default setting of the DDR 4630 is to automatically operate at either 2 97 Gb s 3G SDI 1 485 Gb s HD SDI or 270 Mb s SD SDI ASI signals and do not require any adjustment prior to use with the exception of DIP switch options described in the Configuration section of this manual that also allow SD only HD SD only or reclocker bypass modes of operation The serial digital signal connections are made to the BNC connectors on the rear panel Two identical signal outputs OUT 1 and OUT 2 are provided BNC connectors IN 1 and IN 2 are not used Optical Connections Optical connections are made to the panel adapter mounte
18. g 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 automatic notification of a predetermined event SNMP Block Diagram SNMP Agent Protocol Engine SNMP Agent IP SNMP Agent SNMP Agent Protocol Engine Network SNMP Agent Protocol Engine SNMP Agent IRT Electronics Pty Ltd www irtelectronics com Page 13 of 19 Revision 00 DDT 4630 amp DDR 4630 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
19. he equipment is within the warranty period or not Contact IRT for current hourly rate SD OP 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 19 of 19 Revision 00
20. led Automatic Changeover mode disabled 2 enabled Automatic Changeover mode enabled 3 na Not applicable as reported by DDR 4630 Setting this parameter has the same effect as disabled Information and control of the DDT 4630 in table form Table data entry An indication of the channel designator 3 ch Tx Primary signal input IN 1 and Optical Transmitter settings column designator 2 ch 2 Secondary signal input IN 2 column designator An indication of the signal rate present unknownPresent Signal rate is not one of the 3G HD SD SDI ASI rates sdiSD ASI Present Signal is either an SD SDI or ASI signal or at 270 Mb s rate sdiHD Present Signal is either an HD SDI signal or at 1 485 Gb s rate sdi3G Present Signal is either an 3G SDI signal or at 2 97 Gb s rate notPresent No signal is present IRT Electronics Pty Ltd www irtelectronics com Page 15 of 19 Revision 00 DDT 4630 amp DDR 4630 dataRateSet Control of the signal data rate setting 1 sdi3G HD SD ASI Reclocker set to 3G SDI HD SDI or SD SDI ASI rates 2 sdiHD SD ASl only Reclocker set to HD SDI 1 485 Gb s and SD SDI ASI 270 Mb s rates only 3 sdiSD ASl only Reclocker set to SD SDI ASI 270 Mb s rate only 4 bypassed Reclocker bypassed to allow other signal rates through 5 na Not Applicable If selected defaults to 3G HD SD SDI ASI rate setting channelEnable An indication and control of how and whether the cha
21. nable or Disable Traps to be sent when the electrical signal condition changes 1 notEnabled No Traps sent on change of electrical signal presence 2 enabled Traps automatically sent on change of electrical signal presence 3 na Not Applicable If selected defaults to notEnabled setting opticalStatus An indication of how the SFP optical component is functioning 1 opticalGood DDR 4630 optical input level is good 2 opticallow DDR 4630 optical input level has gone below its minimum input threshold AND electrical signal presence is also reported may or may not contain signal errors 3 opticalFail DDR 4630 optical input level has gone below its minimum input threshold AND no electrical signal is present waveLength Applicable to DDT 4630 only DDR 4630 always reports 16 wideband Indicates that it is a wideband receiver detectorType An indication of the detector type PIN or APD fitted to the DDR 4630 1 pin PIN detector fitted Suitable for path losses up to 18dB at 3G SDI rate 2 apd APD detector fitted Suitable for path losses up to 27dB at 3G SDI rate opticalTrapEnable Enable or Disable Traps to be sent when the optical signal condition changes 1 notEnabled No Traps sent on change of optical signal presence 2 enabled Traps automatically sent on change of optical signal presence 3 na Not Applicable If selected defaults to notEnabled setting fpgaVersion An indication of the firmware
22. nnel is enabled 1 notEnabled The electrical input signals are not enabled 2 enabledActive Electrical signal is both Enabled and Active Relates to IN 1 3 enabledMuted Electrical signal is Enabled but the output is Muted when no signal is present or the wrong data rate has been applied 4 enabledChangedOver Reported if autoChangeOver is enabled and signal on IN 1 is absent or invalid with a valid signal on IN 2 indicating that IN 2 is being transmitted 5 na Not Applicable If selected defaults to current applicable enabled setting channelAlias A16 character maximum Alias name for the input signals can be read and set blankLine A line spacing within the table to make reading the table easier channelKeepAlive A substitution of a 54 MHz signal in place of no input signal to keep the optical link active at the receiver end 1 on Keep Alive signal active 2 off Keep Alive signal not active 3 na Not Applicable If selected defaults to Off state chanPresTrapEnable Enable or Disable Traps to be sent when the electrical signal condition changes 1 notEnabled No Traps sent on change of electrical signal presence 2 enabled Traps automatically sent on change of electrical signal presence 3 na Not Applicable If selected defaults to notEnabled setting opticalStatus An indication of how the SFP optical component is functioning 1 opticalGood DDT 4630 laser is present 3 opticalFail DDT 4630 la
23. ported as an opticalLow condition via SNMP Note that if a received electrical signal is present in this situation it may be possible that the signal may contain errors if the optical signal level has actually gone below its minimum reliable input level before the output is muted whence an opticalFail situation would be reported Therefore accuracy of the received electrical signal should be confirmed if a Minor alarm or opticalLow condition is reported by the DDR 4630 IRT Electronics Pty Ltd www irtelectronics com Page 9 of 19 Revision 00 Front amp rear panel connector diagrams IN DDT 4630 IRT D HD 3G LASER DC CAUTION Direct connections to module DDT 4630 amp DDR 4630 IN DDR 4630 IRT SD HD 3G OPTICAL DC CAUTION Direct connections to module N140 DDR 4630 IN 1 amp IN 2 BNC connectors not used IRT Electronics Pty Ltd www irtelectronics com Revision 00 DDT 4630 amp DDR 4630 OPERATION The DDT 4630 and DDR 4630 is a single channel 3G HD SD SDI ASI optical link Both the DDT 4630 and DDR 4630 cards are fully operable with previous IRT single channel 3G HD or SD fibre links The default settings of both the DDT 4630 and DDR 4630 are automatically set 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 However either DIP s
24. roper antistatic procedures should be followed when inserting or removing cards from 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 DDT 4630 The default setting of the DDT 4630 is to automatically operate at either 2 97 Gb s 3G SDI 1 485 Gb s HD SDI or 270 Mb s SD SDI ASI signals and do not require any adjustment prior to use with the exception of DIP switch options described in the Configuration section of this manual that also allow SD only HD SD only or reclocker bypass modes of operation The serial digital signal connections are made to the BNC connectors on the rear panel IN 1 is the primary input to the DTR 4630 With DIP switch SW1 6 OFF IN 2 becomes the secondary input and will switch in automatically on loss o
25. s 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 19 Revision 00 DDT 4630 amp DDR 4630 GENERAL DESCRIPTION BLOCK DIAGRAM DDT 4630 amp DDR 4630 SIGNAL PATH 3G SDI HD SDI SD SDI ASI 3G SDI HD SDI SD SDI ASI Monitor O P s Fibre Link 9 27 dB path loss at 3G gt 30dB at HD and SD NOTE Fitted with APD detector 3 18 dB when fitted with PIN detector
26. ser has failed or is not present No electrical signal present or signal is not at one of the settable 3G HD SD SDI rates waveLength An indication DDT 4630 laser wavelength detectorType Applicable to the DDR 4630 only See explanation for DDR 4630 SNMP function 3 na Not Applicable opticalTrapEnable Enable or Disable Traps to be sent when the optical signal condition changes 1 notEnabled No Traps sent on change of optical signal presence 2 enabled Traps automatically sent on change of optical signal presence 3 na Not Applicable If selected defaults to notEnabled setting fpgaVersion An indication of the firmware version of the microcontroller in the format x y where x is the major revision number and y the minor Unit reset control 1 normal when queried reset control returns a normal state 2 reset system reset causes sysUpTime counter to reset IRT Electronics Pty Ltd www irtelectronics com Page 16 of 19 Revision 00 DDR 4630 sysDescr sysObjectID sysUpTime sysName irt463xType alarms ctriMode autoChangeOver channelinfoTable channelinfoEntry channelDesignator inputStatus dataRateSet channelEnable channelAlias blankLine channelKeepAlive DDT 4630 amp DDR 4630 Adescription of the unit Optical Receiver Object identifier irtDDR4630 A indication of how long the unit has been running since its last power on or reset in Days
27. ter has been set for either HD SD only or 3G HD SD 3G operation The primary input IN 1 is being fed with an HD source The secondary input LASER IN 2 even though its rate is within the Tx set rate will flash as its rate is different to the primary input s rate On loss of primary input the secondary will still take control and stop flashing as its rate is still within the set Tx rate DDT 4630 If both primary and secondary inputs were HD SDI and 3G SDI signals for example and the Tx data rate was set for SD only operation then both the HD and 3G LEDs will alternatively flash Laser failure on the DDT 4630 is indicated by an orange illuminated LASER LED In the above example there is no laser failure as indicated by the non illuminated LASER LED Optical Low or optical input failure on the DDR 4630 is indicated by an orange illuminated OPTICAL LED In this example the OPTICAL LED is illuminated but so is the HD signal LED This indicates that an HD signal is being received even though the OPTICAL alarm LED is illuminated thus the OPTICAL alarm LED is indicating that the optical signal level is low or approaching the minimum signal strength allowed before signal failure takes place whence the receiver output will be muted Note however that it is still possible for the optical signal strength to be low and still allow an errorred data signal to be received before signal muting takes place This is because the optical alarm threshol
28. 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 may need an optional plug in SNMP 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 communicated 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 Es D F
29. use of alarm signals on both modules SNMP Simple Network Management Protocol is available for remote monitoring when used in conjunction with an IRT frame fitted with SNMP capability Standard features Transports 3G SDI HD SDI SD SDI or ASI signal rates Path lengths up to 30 dB optical path loss using 9 125um single mode fibre Automatic changeover switching of input for signal redundancy on Tx LED indicators and external alarm contacts Fibre video and alarm connections at rear Remote monitoring via SNMP NOTE 1 27dB path loss at 3G Typically gt 30dB at HD and SD Fitted with APD detector IRT Electronics Pty Ltd www irtelectronics com Page 5 of 19 Revision 00 TECHNICAL SPECIFICATIONS DDT 4630 Input serial data signal Input impedance Input return loss Automatic cable compensation Input connector Output connector DDR 4630 Number of outputs Output level Output impedance Output return loss Output rise and fall time Intrinsic jitter Output connector Optical DDT 4630 optical output DDR 4630 optical input Available wavelengths Optical path loss Optical fibre Optical connector Power Requirements Voltage Power consumption Other Temperature range Mechanical Finish Front panel Rear assembly Dimensions NOTE 2 DDT 4630 amp DDR 4630 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 C and DVB ASI
30. witch or SNMP settings allow the unit to be set for SD only SD HD only or reclocker bypass modes A 2 97 Gb s 3G SDI signal 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 IN 1 of the rear assembly of the DDT 4630 fibre optic transmitter Front panel LEDs indicates the presence and data rate of a valid input signal A second input IN 2 can be automatically switched to the optical output if enabled on loss of a valid input signal to IN 1 On resumption of a valid signal to IN 1 the optical transmitter automatically switches back to the IN 1 input 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 optical receiver still recognizes the optical link as being valid This 54MHz signal does not affect the signal reclocking detect circuitry of the receiver section 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 P
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