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User Manual - IRT Communications

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1. 4090 dvg ib rev1 doc 23 of 29 22 10 2007 Setting of Audio Frequencies and Amplitudes The DVG 4090 also includes an in built audio generator for embedding four channels of audio within Group 1 of the SDI test pattern Insertion is 48kHz synchronous at 20 bit resolution There is no audio associated with the composite outputs on either the digital or analogue rear assemblies Individual frequencies and amplitudes are set by the DVG 4090 software Twenty seven possible frequencies can be set on each of the four channels these being Silence 50 100 150 200 250 300 400 500 600 750 800 1000 1200 1500 1600 2000 2400 3000 3200 4000 4800 6000 8000 9600 12000 amp 16000 Hz The maximum amplitude for each audio signal that can be set is 0 000 dBFS Amplitudes less than or equal to 0 000 dBFS must be set else an error message will be received and the software will not load An example of various audio settings is shown below Audio Generator Frequency Amplitude Channeli Sience 0 000 gprs Channel2 500H2 2500 gprs Channela 1000Hz 6 000 gprs Channel 4 16000H2 0 000 gprs Download Audio Inserting audio channels within the test pattern can help determine particular audio channels within a stream or stream identifications When used with the Countdown banner it is also possible to determine whether there is any audio lead or lag if the video signal passes through various signal processors s
2. 625 or 525 line link selectable 1 x SDI when used with analogue input link setting 75Q BNC Re clocked 270 Mbit s SDI SMPTE 259M 800 mV 10 3 x Composite one with relay bypass when used with analogue composite input PAL or NTSC link selectable 75Q BNC Closed relay contacts on loss of input signal 28 Vac CT 14 0 14 or 16 Vdc lt 4 VA 0 50 C ambient Suitable for mounting in IRT 19 rack chassis with input output and power connections on the rear panel Grey background silk screened black lettering amp red IRT logo Detachable silk screened PCB with direct mount connectors to Eurocard and external signals 32 mm x 3 U x 220 mm IRT Eurocard Digital and Analogue Rear connector assemblies Due to our policy of continuing development these specifications are subject to change without notice 4090 dvg ib rev1 doc 4 of 29 22 10 2007 Configuration Link Settings LK 1 OUT 625 line PAL operation LK 1 IN 525 line NTSC operation LK 2 Reserved LK 3 Not used LK 4 OUT Inserted Channel 2 audio into SDI stream is continuous LK 4 IN Inserted Channel 2 audio into SDI stream is pulsed interrupted on a cyclic basis see note below LK 5 OUT SDI input selected LK 5 IN Analogue composite input selected Note Unit will detect type of input signal whether it be 625 line or 525 line Link LK1 affects the test pattern output on loss of input and so should be set to that of inp
3. I R T Electronics Pty Ltd A B N 35 000 832 575 26 Hotham Parade ARTARMON N S W 2064 AUSTRALIA National Phone 02 9439 3744 Fax 02 9439 7439 International 61 2 9439 3744 61 2 9439 7439 Email sales irtelectronics com Web www irtelectronics com SDI Composite Test Pattern Generator Designed and manufactured in Australia 4090 dvg ib rev1 doc IRT Eurocard Type DVG 4090 with Crash Switching IRT can be found on the Internet at http www irtelectronics com 1 of 29 22 10 2007 IRT Eurocard Type DVG 4090 SDI Composite Test Pattern Generator with Crash Switching Instruction Book Table of Contents Section Page Operational Safety 2 General Description 3 Technical Specifications 4 Configuration 5 Link Settings 5 Front Panel Indicators 5 Front Panel Switch Controls 5 Test Patterns 7 Installation 17 Rear Assembly 17 Alarm Output Connection 17 Front amp rear panel connector diagrams 18 Operation 19 SDI Input 19 Analogue Composite Input 19 Front Panel Indicators 19 Mode setting 19 Examples of Mode setting outputs 20 Banner Setting 21 Test Pattern Setting 21 Programming via USB interface 22 Downloading of Banners and Pictures 23 Setting of Audio Frequencies and Amplitudes 24 Countdown Banner 24 SNMP 26 DVG 4090 SNMP Functions Future 28 Maintenance amp storage 29 Equipment return 29 This instruction book applies to units later than S N 0710001 Operational Safety WARNING Operation
4. 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 4090 dvg ib rev1 doc 2 of 29 22 10 2007 IRT Eurocard Type DVG 4090 SDI Composite Test Pattern Generator with Crash Switching General Description DVG 4090 Functional Diagram SDI I P SK4 SDI O P 1 SK9 SDI Equaliser amp Carrier Detect Audio SDI Embedder Driver o SDI O P 2 SK2 Signal Comp O P 1 Composite Processing Composite A SK5 Detector Drivers RL2R 2 Composite I P SK3 Composite Encoder Pemo e SK6 O Comp O P 3 SK7 Switches Test Pattern O RL1 Front Mode O Alarm O P Panel Banner O J2 The DVG 4090 acts as an analogue digital video crash switcher and test pattern generator On loss of video input output is automatically switched to a choice of 16 test patterns 8 custom built banners containing text or pictures such as station logos and 2 full screen pictures can be downloaded b
5. are from the SDI output as viewed on a Tektronix WFM 700 waveform monitor Colour Bars 75 Colour Bars 100 2T 4T 20T Pulse amp Bar DpDg 4090 dvg ib rev1 doc 7 of 29 22 10 2007 5 Step Y 2 5MHz Bowtie Multiburst 60 Y Sweep 60 Y 4090 dvg ib rev1 doc 8 of 29 22 10 2007 Sweep 100 Y Multipulse Y SinXX Y Valid Ramp 4090 dvg ib rev1 doc 9 of 29 22 10 2007 Shallow Ramp Y Black Equaliser PLL 4090 dvg ib rev1 doc 10 of 29 22 10 2007 Using the supplied DVG 4090 software the existing test patterns can be erased and replaced by any of the following supplied test patterns 10 Step Y 10 Step YC 2T 4T 10T Pulse amp Bar 2T Pulse amp Bar NTSC 4090 dvg ib rev1 doc 11 of 29 22 10 2007 3 Channel Ramp 50 Flat Field 500kHz Bowtie Active Picture Timing 4090 dvg ib rev1 doc 12 of 29 22 10 2007 B Y Valid Ramp Co siting Pulse Gamut Limit Ramp 4090 dvg ib rev1 doc 13 of 29 22 10 2007 Modulated Ramp Multiburst 60 Multipulse NTSC Oversize Ramp 4090 dvg ib rev1 doc 14 of 29 22 10 2007 Red 75 Red 100 R Y Valid Ramp Shallow Ramp YC 4090 dvg ib rev1 doc 15 of 29 22 10 2007 SMPTE Bars T Sweep 60 YC j P i Sweep 100 YC Whit
6. 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 delivery unless contrary conditions apply under a particular contract of supply For situations when No Fault Found for repairs a minimum charge of 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 co
7. ates audio is lagging behind the video If audio is embedded within the test pattern using the supplied DVG 4090 software with link LK4 inserted and banner is set to Countdown position D channel 2 audio will have a period of silence added to the audio stream every 8 seconds followed by 12 seconds Audio channels 3 and 4 have periods of silence added to the audio streams regardless whether link LK4 is inserted or not Channel 3 has a single 0 375 second period of silence added at the beginning of a 4 second interval Channel 4 has two 0 375 second periods of silence added 0 75 seconds after the beginning of the same 4 second interval 4090 dvg ib rev1 doc 24 of 29 22 10 2007 Channel 3 and Channel 4 audio streams have the following timing arrangement 4 seconds 0 758 0 758 Audio Channel 3 0 375 S Audio Channel 4 0 375 S 0 3758 Corresponding A A A A Marker Points 4090 dvg ib rev1 doc 25 of 29 22 10 2007 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 versi
8. attern switches 1s a sixteen position rotary switch Each position is marked in a hexadecimal sequence from 0 to F The actual position is shown on the switch itself As the switch is set back from the front panel a flat bladed screwdriver is needed to adjust the position The position number is also set back behind the front panel The reason for setting the switches back was so that switch positions could not easily be set by hand and so not accidentally set to the wrong position by someone not authorised to do so The Mode table shown in the Configuration section of this manual shows the functions of the switch position settings With a valid input signal switch positions 0 to E will allow the input signal to pass from the input connector directly to the main output connector for the analogue rear assembly regenerated with the digital rear assembly Depending on the actual Mode switch position the digital rear assembly also allows the SDI input signal to be superimposed with a banner overlay or keyed banner On the loss of a valid input signal the resultant output test pattern as determined by the Test Pattern switch position will be either a test pattern only a test pattern with banner overlay or a test pattern with keyed banner It is also possible to add audio to the SDI test pattern as set by the supplied DVG 4090 software Mode switch position F allows remote control operation via a Network Management System NMS provided the DVG 4090
9. ber you wish to download and then click on the Download Banner button The following window then opens Banner 2 bmp Banner 3 6mp Banner 4 brp Banner 5 brp Banner 6 brp mi Banner 7 bmp H Banner amp bmp H Countdown bmp Mi Picture 1 brop i Picture 2 bmp Files of type Banner files bmp Cancel ZA From here pick the banner that you wish to download to that particular Banner Number position If your banner is not in this particular directory change your directory path in this window Remember that banners need to be created first as an uncompressed 24 bit RGB 720 x 72 pixel size bitmap BMP file using a suitable drawing program Either double click on the banner name or highlight the banner name and click on the Open button The existing Banner Number will be erased and the new banner overwritten To erase a banner without overwriting with anything else just click on the Cancel button and no banner will be chosen to overwrite but the existing banner will still be erased Erasing a banner without overwriting with another leaves that banner position with a complete black background Download is not complete until the Download Complete window appears Dvc 4090 E Ci Download Complete The same principal applies for downloading countdown pictures and test patterns however the test pattern files are supplied with the DVG 4090 software and are test line files with the filename extension tst
10. e 4090 dvg ib rev1 doc 16 of 29 22 10 2007 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 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 Rear Assembly The DVG 4090 comes with a common rear assembly for use with either an SDI input or an analogue composite PAL or NTSC signal Link LK5 sets whether the unit will work with the SDI input or analogue composite input See Link Settings in Configuration section of this manual Digital Video Connec
11. e operation Any drawing package capable of drawing bitmaps such as Microsoft Paintbrush or CorelDraw can be used to create banners and pictures Banner 720 x 72 pixels Banners can be overlaid or keyed over background video For keying purposes black background must be absolute RGB black R 0 G 0 B 0 Banner black keying can be overridden by making the picture black not absolute RGB black Example of company logo placement Test Pattern Setting Like the Mode and Banner switches the Test Pattern switch is a sixteen position rotary hexadecimal switch The Test Pattern table shown in the Configuration section of this manual shows the preloaded test patterns corresponding to the switch position settings A choice of sixteen test patterns can be set to operate in conjunction with the Mode and Banner switches As well as the sixteen default test patterns supplied it is possible to change the test patterns to any of the other supplied test patterns by the use of the supplied DVG 4090 software 4090 dvg ib rev1 doc 21 of 29 22 10 2007 Programming via USB interface The DVG 4090 comes supplied with software and drivers for loading of banners and pictures and changing of test patterns and audio parameters audio parameters for SDI test pattern applications only The DVG 4090 is connected to a PC running Microsoft Windows via a USB cable to the USB port on the front panel The USB interface supports USB 1 1 and USB 2 0 full speed o
12. is housed in an IRT 4000 series frame fitted with Simple Network Management Protocol SNMP functionality 4090 dvg ib rev1 doc 19 of 29 22 10 2007 Examples of Mode setting outputs Test Pattern only Test Pattern with Banner Overlay Test Pattern with Keyed Banner 4090 dvg ib rev1 doc 20 of 29 22 10 2007 Banner Setting Like the Mode and Test Pattern switches the Banner switch is a sixteen position rotary hexadecimal switch The Banner table shown in the Configuration section of this manual shows the functions of the switch position settings A choice of eight banners and two pictures can be set to operate in conjunction with the Mode and Test Pattern switches Settings also allow banners to cycle sequentially by approximately 2 5 seconds per banner This can give the illusion of a flashing banner or movement Banner switch position D is a special banner called Countdown This is a moving bar graph and is described in detail later in this section This position only works correctly for Mode settings set to Banner Overlay positions Banner content may be text or pictures It is up to the users to make their own banners or pictures as these will be dependent on the situation required Preloaded banners are for example only Both banners and pictures need to be uncompressed 24 bit RGB bitmap BMP files Banners need to be 720 x 72 pixels in size whilst pictures must be 720 x 576 pixels for 625 line or 720 x 480 for 525 lin
13. m the rear assembly the SDI input SK4 is outputted directly to SDI O P 1 SK9 by a relay mounted on the rear assembly Analogue Composite Input With link LK5 IN the DVG 4090 takes an analogue composite feed as its input SK3 and directly outputs itself to composite output 1 SK5 via a relay on the rear assembly As the source input is directed directly to its output it is not possible to superimpose the banner directly over the incoming video signal as in the case of the digital rear assembly A high impedance on board video detector also monitors the incoming composite video signal On loss of video input the chosen test pattern as per the Test Pattern switch position with or without banner overlay keyed banner as per the Mode switch position relay switches to the main composite output SK5 On loss of video one SDI output SDI O P2 SK2 and the two other composite outputs SK6 amp SK7 match the main composite output SK5 As the input signal is already being directly outputted to the main composite output by a relay on the rear assembly loss of power or module removal will not affect operation of the video signal path Front Panel Indicators Front panel LEDs give a visual indication for loss of input video signal red whether the corresponding output signal is PAL 625 line green or NTSC 525 line green and power indication green Mode Setting The front panel Mode switch as well as the front panel Banner and Test P
14. mon and normally closed pins of a relay come out on these connections and short together on an alarm condition 4090 dvg ib rev1 doc 17 of 29 22 10 2007 Front amp rear panel connector diagrams The following front panel and rear assembly drawings are not to scale and are intended to show relative positions of connectors indicators and controls only Q DVG 4090 In T INPUT Loss NTSC PAL Mode Banner Test Pattern D 4090 dvg ib rev1 doc 18 of 29 IRT O PL1 SDI IN H RELI Q Composite 1 SK5 2 CoN A 3 22 10 2007 Operation Before use setup the links as per the Link Settings in the Configuration section and ensure that the unit is correctly installed as per the Installation section of this manual SDI Input With link LK5 OUT the DVG 4090 takes an SDI feed as its input and outputs two regenerated SDI outputs and three composite analogue outputs which are directly derived from the current SDI output Depending on the position of the Mode switch it is possible to overlay or key the banner over the existing SDI input stream if desired On loss of the SDI input all outputs SDI amp composite output the test pattern as per the Test Pattern switch position with or without banner overlay keyed banner embedded audio as per the Mode switch position Audio embedding is only available on the SDI outputs On loss of power to the DVG 4090 or if the module is removed fro
15. n 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 MIB 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 OAMP Oem 5p SNMP Agent NMS Protocol Engine IP SNMP Agent gt SNMP Agent Network Protocol Engine NMS SNMP Agent _ p SNMP Agent Protocol Engine 4090 dvg ib rev1 doc 26 of 29 22 10 2007 SNMP with IRT Products IRT Electronics currently employs SNMPv1 with its 4000 series frame The frame acts as an agent when fitted with a CDM 4000 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 4000 module Note that the NMS software is third party and
16. nditions 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 hour s labour will apply whether the equipment is within the warranty period or not Contact IRT for current hourly rate ey a 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 direct as follows Equipment Service IRT Electronics Pty Ltd 26 Hotham Parade ARTARMON N S W 2064 AUSTRALIA Phone 61 2 9439 3744 Fax 61 2 9439 7439 Email service irtelectronics com 4090 dvg ib rev1 doc 29 of 29 22 10 2007
17. 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 communicated to the CDM 4000 agent via a data bus on the rear of the frame Thus the CDM 4000 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 4000 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 RS232 Ethernet IRT SNMP Connections IRT modules fitted CDM 4000 with SMU 4000 PSU s IRT 4000 Series Frame Eth Ethernet Cable eel IRT modules fitted DM 4 wi
18. ons only to bring attention to the fact that IRT Electronics modules fitted with SNMP capability use SNMPvl 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 NMSs 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 NMSs using SNMP Managed device agent variables are organised in a tree structure known as a Management Informatio
19. peration When the USB cable is connected the DVG 4090 automatically enumerates with Windows and requests drivers supplied if necessary The DVG 4090 must be connected to the PC prior to executing the program and should not be disconnected until programming is complete Execute the DVG 4090 program Programming and erasing of the test patterns banners and audio data can now be performed Upon running the DVG 4090 program the following window opens Buse pore noToPeN ues Picture Generator Picture Humber Banner Generator Banner Number Y Download Banner Test Pattern Generator Test Pattern Number 0 Download Test Pattern Audio Generator Frequency Amplitude Channel Sience 00 as Channel2 Silence 0 0 dBFS Channel3 Silence 0 0 dBFS Channel4 Silence 0 0 dBFS Download Audio Download Countdown 4090 dvg ib rev1 doc 22 of 29 22 10 2007 Downloading of Banners and Pictures Up to 2 pictures 8 banners and 16 test patterns can be downloaded to the DVG 4090 Choose the picture number banner number or test pattern number you wish to over write by clicking the PC s mouse over the number in the box corresponding to your choice For example clicking over the Banner Number opens the following box Banner Generator Banner Number 7 j Download E 2 4 A z E Test Pattern Generator Click on the Banner Num
20. r Audio Overlay F SNMP Remote SNMP Remote Note Overlaying and Keying for SDI input only not valid for Composite input Audio insertion for SDI outputs only not valid for Composite outputs l 2 3 4 5 7 Banners and Audio frequencies are initially loaded by user using supplied software and USB port on front panel 4090 dvg ib rev1 doc 5 of 29 22 10 2007 Switch Function Banner Sa Position F Note Banners and Pictures are initially loaded by user using supplied software and USB port on front panel Countdown position D must only be used with Mode settings set to Banner Overlay positions Test r 4 Switch Original Factory Setting Pattern os D Position 5 Colour Bars 00 Colour Bars Test Pattern 2 2T 4T 20T Pulse amp Bar D Test Pattern 4 5 Step Y Test Pattern 5 2 5 MHz Bowtie ultiburst 60 Y 7 weep 60 Y weep 100 Y ultipulse Y A inXX Valid Ramp C Test Pattern C hallow Ramp Y Test Pattern D ack E ualiser F L Note Test Patterns can be loaded or erased by user using supplied software and USB port on front panel pd se Wie UN es A E ee A aa S A E La B C C D E A az B 4090 dvg ib rev1 doc 6 of 29 22 10 2007 Test Patterns A number of test patterns with full 10 bit resolution are available for use with the DVG 4090 sixteen of which are preloaded into the unit when it is first purchased The following images shown
21. th SMU 4000 as gop IRT 4000 Series Frame Ethernet Cable IRT 4000 Series SNMP Setup 4090 dvg ib rev1 doc 27 of 29 22 10 2007 DVG 4090 SNMP Functions Future With the Mode switch set to the SNMP position F and the DVG 4090 installed in an IRT 4000 series frame with SNMP capability the DVG 4090 can be interrogated by an SNMP Network Management System NMS The following SNMP functions are capable of being monitored and controlled by an NMS An indication that the video input is present and whether it is Composite or SDI and PAL or NTSC An indication of whether the output is set for 625 or 525 line operation An indication whether audio channel 2 is set for continuous or pulsed operation Selection of Mode function Selection of Banner function Selection of Test Pattern function Whether Trap function is enabled Trap automatically sent if enabled if the input signal fails Unit reset control 4090 dvg ib rev1 doc 28 of 29 22 10 2007 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
22. tions The digital SDI input and outputs are 75 Q BNC type for connection with high quality 75 Q coaxial cable Input is self terminating No loop through facility is available On loss of power to the module the SDI input SK4 is relay bypassed to SDI O P 1 SK9 Note that when the DVG 4090 is used for monitoring an analogue video signal link LK5 IN only one SDI output SDI O P 2 SK2 is present as the digital output Analogue Video Connections When used with an SDI input the rear assembly also includes 3 analogue video outputs which are analogue representations of the SDI input or SDI test pattern generator all of which are 75 Q BNC type for connection with high quality 75 Q coaxial cable When used with an analogue composite video input SK3 the analogue signal passes directly to composite output 1 SK5 via a relay whilst a valid composite input signal is detected On loss of sync the input is terminated in 75 Q and the composite output switches to the selected test pattern output mode Two other composite outputs SK6 amp SK7 are provided that match that of the main composite output SK5 when the unit has lost a valid input Note that when the DVG 4090 is used for monitoring an analogue video signal link LKS5 IN only one SDI output SDI O P 2 SK2 is present as the digital output Alarm Output Connection A 2 pin connector is provide on the rear assembly for an alarm connection for loss of video input or loss of power The com
23. uch as frame stores or video compressors for example Countdown Banner With the Banner switch set to the Countdown position D the banner displayed is a moving bar graph as shown below The Countdown banner is divided up in 1 second increments from 0 to 10 The bar of the graph moves up and down in time to the printed scale This gives an indication that a system such as a framestore or video encoder has not frozen A moving picture would obviously indicate whether a freeze frame has occurred however a static test pattern would not Having the moving bar allows the user to see instantly whether the test pattern image has frozen or not Countdown position D needs the Mode switch set to a Banner Overlay position in order for the moving bar graph to work correctly Although audio is generally embedded within an SDI stream with processing through various systems such as video compression circuits it is still possible for the audio signals to get out of sync with the video signal The Countdown banner provides marker points corresponding to embedded audio channels 2 3 and 4 which indicate when an interrupted audio signal should be heard to indicate audio sync with the SDI video signal The markers correspond to the start of temporary silence within the audio channel streams whilst the bar moves upwards from 0 to 10 Silence starting before the marker indicates that audio is leading the video whilst silence starting after the marker indic
24. ut signal 77 Link LK 4 IN is only effective with Banner switch set to Countdown position D Front Panel Indicators Input Loss Red loss of video input NTSC Green 525 line NTSC video present PAL Green 625 line PAL video present DC Green power present Front Panel Switch Controls Three front panel hexadecimal rotary switches marked Mode Banner and Test Pattern setup the DVG 4090 operation on loss of input When using the DVG 4090 for SDI input the Mode switch also allows for overlaying or keying on top of the input SDI signal The tables below detail the switch setting operational functions Switch Function MOJE Position With Valid Input Output on Loss of Input Input Output Test Pattern only Input Output Test Pattern with Banner Overlay Input Output Test Pattern with Keyed Banner Overlay Test Pattern with Banner Overlay Overlay Input Output Test Pattern with Keyed Banner Overlay Input gt Output Key est Pattern only nput Output Key est Pattern with Banner Overlay I Input gt Output Key est Pattern with Keyed Banner Input Output est Pattern only Audio A Input Output est Pattern with Banner Overlay Audio Input Output Test Pattern with Keyed Banner Audio C Input Output Test Pattern only Audio Overlay Input Output Test Pattern with Banner Overlay Overlay E Input Output Test Pattern with Keyed Banne
25. y supplied software Single banners can be overlaid or keyed onto the test pattern output in the lower section of the video picture In the case of an SDI input these banners can also be overlaid onto the existing stream A countdown banner and audio test signal insertion is also available for link identification purposes The DVG 4090 is designed to fit IRT s standard Eurocard frames as well as IRT s 4000 series frame for use with IRT s SNMP system and may be used alongside any other of IRT s analogue or digital Eurocards Features SDI or Composite PAL NTSC operation Choice of 16 Test Patterns on loss of video input Choice of 8 banners overlaid or keyed onto SDI input or Test Pattern output 4090 dvg ib rev1 doc 3 of 29 22 10 2007 Input Digital Connector Format Equalisation Input Analogue Connector Format Outputs Digital Number Connectors Format Signal Level Outputs Analogue Number Connectors Alarm Output Power requirements Power consumption Other Temperature range Mechanical Finish Front panel Rear assembly Dimensions Standard accessories Technical Specifications IRT Eurocard Module DVG 4090 75Q BNC 270 Mbit s SDI SMPTE 259M 625 or 525 line link selectable Automatic better than 200 metres at 270 Mb s for Belden 8281 or equivalent cable 75Q BNC PAL or NTSC link selectable 2 x SDI one with relay bypass when used with SDI input

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