User Manual - IRT Communications
Contents
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7. IR T Electronics Pty Ltd A B N 35 000 832 575 26 Hotham Parade ARTARMON N S W 2064 AUSTRALIA National Phone 02 94393744 Fax 02 9439 7439 International 61 2 9439 3744 61 2 9439 7439 Email sales irtelectronics com Web www irtelectronics com IRT Eurocard Types ADC 3250 OPT Analogue Video amp Audio to 270 Mb s amp DAC 3250 OPT 270 Mb s to Analogue Video amp Audio Fibre Optic Link Designed and manufactured in Australia IRT can be found on the Internet at http www irtelectronics com 3250 ade amp 3250 dac ib rev3 doc Page of 12 31 08 2007 IRT Eurocard Types ADC 3250 OPT amp DAC 3250 OPT Analogue Video amp Audio to 270 Mb s Section Operational Safety General Description Fibre Optic Link Instruction Book Table of Contents Technical Specifications Configuration Installation Front and rear layouts Operation Maintenance amp Storage Warranty amp Service Equipment return Drawing List Index This instruction book applies to units later than S N 0404001 Operational Safety Operation of electronic equipment involves the use of voltages and currents that may be dangerous to human life Note that under certain conditions dangerous WARNING Page gt 11 11 11 12 potentials may exist in some circuits when power controls in the OFF position Maintenance personnel should observe all safety regulations Do not make an
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12. this is a receive path only For connection to a standard RS 232 9 pin D connector wire as per the diagram below 9 Pin D Connector RS 232 RXD RTS CTS Ribbon Cable Unbalanced Audio Operation Audio inputs and outputs are balanced by default however it is possible to wire the audio connectors for use with equipment using unbalanced interfaces On the ADC 3250 OPT connect the common or shield cable to pin 1 of the input audio connector and the signal cable to either pin 2 or pin 3 but not both of the audio connector The unused pin whether it be pin 2 or pin 3 connect to pin 1 3 3 2 or 2 1 GND 1 GND ADC 3250 OPT unbalanced input wiring On the DAC 3250 OPT connect the common or shield cable to pin 1 of the corresponding output audio connector and the signal cable to either pin 2 or pin 3 depending on what pin the signal cable was connected to on the encoder DO NOT ground the unused pin Leave the unused pin unconnected else damage may occur to the audio driver chip 30 30 2 9 or 2 1 GND 1 GND DAC 3250 OPT unbalanced output wiring 3250 ade amp 3250 dac ib rev3 doc Page 8 of 12 31 08 2007 Front amp rear panel connector diagrams The following front panel and rear assembly drawings are not to scale and are intended to show connection order and approximate layout only IRT ADC 3250 1 MAJOR 2 MINOR C o PT 3 GND L R AUD1 AUD2 VIDEO Da
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14. 3250 270 Mb s to Analogue Video amp Audio decoder schematic sheet 4 3250 ade amp 3250 dac ib rev3 doc Page 12 of 12 31 08 2007 v90c 1 MSN NOWHVLHV poooz PIT Ald LHI 8 SLN ddy ez sur 8 6 08 ON Bumeiq NYY Jeeus q1vos GayOSHO Hoc 8 90184 v PE nd YOLVOIGNI NO k 1N3SNOO 1559 aNg eu oszze en N3LLIHM LNOHLIM e oav mL azis rare in E xA ANY OL 38010510 AL 1001 AdOO LON OQ 1559 A078 9 162 852 iHomadoo 3028 161 1 1 14001 1001 noce noge g 4nO RACKS 4 c x 8cO 912 05 812 Fd ip 38v9 WT cui JNF9NIG bu 3028 zo 3999 20001 Sul tDks e AST oU dm zz E ON S AX 3 g 4nOA NA n 1 TH
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19. 3 of 12 31 08 2007 Technical Specifications IRT Eurocard modules Types ADC 3250 OPT amp DAC 3250 OPT ADC 3250 OPT amp DAC 3250 OPT Technical Specifications ADC 3250 OPT Input Video Equalisation Output Type 1 Type 2 DAC 3250 OPT Input Type 1 Type 2 Equalisation Output Optical Optical path loss Optical fibre Optical wavelength Optical connector Power Requirements Power Requirements Power consumption Other Temperature range Mechanical Finish Front panel Rear assembly Dimensions Supplied accessories 1 x Analogue video 750 BNC terminated 4 Hi Z Analogue audio balanced 3 pin x RS 232 data up to 115200 Baud Up to 300 metres adjustable from front panel 1 x 270 Mb s digital 750 BNC 1 x 270 Mb s fibre optic digital SC PC 1 x 270 Mb s digital 75 BNC 1 x 270 Mb s fibre optic digital SC PC Automatic up to 300 metres for Belden 8281 or equivalent cable 1 x Analogue video 75Q BNC terminated 4 x Lo Z Analogue audio balanced 3 pin 1 x RS 232 data 31 dB maximum Designed for use with 9 125 single mode fibre 1310nm 30nm SC PC 28 Vac CT 14 0 14 or 16 Vdc ADC 3250 OPT 6 5 VA DAC 3250 OPT lt 11VA 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 d
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24. assembly is a 75Q output impedance BNC connector which has the decoded analogue video signal Audio Outputs Four balanced low impedance audio outputs are provided via phoenix style 3 pin plugs labelled as Left Audio 1 Right Audio 1 Left Audio 2 and Right Audio 2 As per standard audio wiring standards pin 1 is ground pin 2 is and pin 3 is 3 2 1 GND 3250 ade amp 3250 dac ib rev3 doc Page 7 of 12 31 08 2007 Alarm Outputs Two relay alarm output states are provided via a phoenix style 4 pin plug Pin 1 is designated as Major pin 2 is designated as Minor and both pins 3 amp 4 are ground Although alarms are designated as Major and Minor it is probably better to think of them as Alarm and Alarm 2 Alarm conditions are as follows Major switch to Open Circuit on loss of selected link input optical or electrical or loss of power Minor switch to Open Circuit if no encoded video present or loss of power s e 4 GND Le 3 GND Le 2 Minor 1 Major Note If no video is inputted to the ADC 3250 OPT system will still work with only audio present RS 232 Data Output The RS 232 data output port is via a 10 pin 14 style of header Pins 1 2 and 7 are connected together on the PCB Pins 9 and 10 are both earthed Pin 3 is the RS 232 receive data RXD connection pin 4 is the RS 232 request to send RTS connection and pin 6 is the RS 232 clear to send CTS connection Data transfer is unidirectional only
25. ators on both units indicate the presence of the analogue and data input signals The ADC 3250 OPT allows cable equalisation of various lengths by a front panel control A front panel monitor output aids in setting this correctly Plug in fibre optic boards are included on both the ADC 3250 OPT and DAC 3250 OPT for direct connection to a single mode fibre The 270 Mb s digital signal is of the same data rate as ASI and SDI signals hence its ability to be sent over ASI SDI paths Although similar in structure to both ASI and SDI it is neither of these types of signals Hence the ADC 3250 OPT and DAC 3250 OPT are designed to act as an encoder decoder pair Both the ADC 3250 OPT and DAC 3250 OPT are manufactured on extended Eurocard boards and are suitable for mounting in IRT s IRU and 3RU Eurocard frames with other analogue or digital modules Standard features 1 analogue video 4 audio and 1 data channel to 270 Mb s digital stream suitable for transmission over 270 Mb s systems such as digital fibre systems routers etc Plug in Fibre Optic Link boards included Functional diagram ADC 3250 OPT DAC 3250 OPT Video Video Input Output Encoding Processing amp amp Signal Decoding Audio Processing Audio 270Mb s 270Mb s Outputs Output Input 21 o2 o3 Optical Path Loss o4 0 31dB Fibre Fibre DATA Output Input Output o 3250 adc amp 3250 dac ib rev3 doc Page
26. 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 Connections ADC 3250 OPT Video Input The ADC 3250 OPT Video In port on the rear assembly is a 75Q terminated BNC connector for analogue video only Use of high quality 75Q coaxial cable is recommended Input equalisation and gain are set via front panel controls Video Mon A front panel 75Q output impedance analogue video monitoring port is provided for monitoring of input signal whilst adjusting front panel gain and equalisation controls 270 Mb s Output The ADC 3250 OPT Output port on the rear assembly is a 75Q output impedance BNC connector which has a 270 Mb s encoded signal suitable for connec
27. e 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 equipment is within the warranty period or not Contact IRT for current hourly rate SON ee 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 612 9439 3744 Fax 61 2 9439 7439 Email service irtelectronics com 3250 ade amp 3250 dac ib rev3 doc Page 11 of 12 31 08 2007 Drawing List Index Drawing Sheet Description 804578 1 ADC 3250 Analogue Video amp Audio to 270 Mb s encoder schematic sheet 1 804578 2 ADC 3250 Analogue Video amp Audio to 270 Mb s encoder schematic sheet 2 804578 3 ADC 3250 Analogue Video amp Audio to 270 Mb s encoder schematic sheet 3 804578 4 ADC 3250 Analogue Video amp Audio to 270 Mb s encoder schematic sheet 4 804597 1 DAC 3250 270 Mb s to Analogue Video amp Audio decoder schematic sheet 1 804597 2 DAC 3250 270 Mb s to Analogue Video amp Audio decoder schematic sheet 2 804597 3 DAC 3250 270 Mb s to Analogue Video amp Audio decoder schematic sheet 3 804597 4 DAC
28. ical sub board is also fitted to the ADC 3250 OPT a front panel LED also indicates if there is a laser failure Adjustments With an ADC 3250 OPT amp DAC 3250 OPT pair there is unity gain between the ADC 3250 OPT inputs and the DAC 3250 OPT outputs The only user operational settings are on the ADC 3250 OPT front panel for compensating the analogue video for input cable losses With a waveform monitor connected to the Video Mon BNC connector on the front panel input a known test signal such as colour bars down the intended input cable Adjusting both the gain and equalisation controls through the front panel using a small flat bladed tweaking screwdriver can compensate for loss of gain and frequency roll off caused by the length of input coaxial cable 3250 ade amp 3250 dac ib rev3 doc Page 10 of 12 31 08 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 areas of high humidity a suitably sized bag of silica gel should be included to deter corrosion Where individual circuit cards are stored they shou
29. irect mount connectors to Eurocard and external signals 6 HP x 3 U x 220 mm IRT Eurocard Rear connector assembly Due to our policy of continuing development these specifications are subject to change without notice 3250 adc amp 3250 dac ib rev3 doc Page 4 of 12 31 08 2007 Configuration ADC 3250 OPT Link Settings Link LK1 IN Left Audio 2 600Q input OUT Left Audio 2 high impedance input default position Link LK2 IN Right Audio 2 600Q input OUT Right Audio 2 high impedance input default position Link LK3 IN Left Audio 1 600Q input OUT Left Audio high impedance input default position Link LK4 IN Right Audio 1 600Q input OUT Right Audio 1 high impedance input default position Switch Settings SWI 1 ON No audio alarm setting OFF Laser fail alarm setting SWI1 2 Not used SWI1 3 Not used SW1 4 Not used DAC 3250 OPT Link Settings Link LK1 Not used Link LK2 Not used Link LK3 Not used If optional optical sub board is fitted Link LK4 IN Select optical input OUT Select electrical coaxial input If optional optical sub board is NOT fitted Link LK4 Not used 3250 adc amp 3250 dac ib rev3 doc Page 5 of 12 31 08 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
30. ld 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 conditions under which the fault initially occurred Any additional information which may be of assistance in fault location and remedy A contact nam
31. ma LASER VIDEO MON 6 CAUTION Direct connections to module VIDEO IN 3250 ade amp 3250 dac ib rev3 doc O OUTPUT IRT DAC 3250 1 MAJOR 2 MINOR ort 3 GND L R auD1 AUD2 VIDEO DATA LINK CAUTION Direct connections to module VIDEO OUT Page 9 of 12 O 31 08 2007 The ADC 3250 OPT will take an analogue video input and up to four analogue audio inputs plus a unidirectional RS 232 data signal and encode them into a single 270 Mb s data stream for interfacing with non inverting ASI SDI links As with ASI signals the 270 Mb s output signal is phase dependent and so should only be used with non inverting links Note that if the system is intended for audio or data use only it is not necessary to also supply an input video signal as all inputs are independent of each other With the link and switch settings correctly set as in the configuration section of this manual and input and output connections correctly wired and cards installed in a suitable frame as in the installation section of this manual operation is as simple as connect and turn on Front panel LED s on both the ADC 3250 OPT and DAC 3250 OPT indicate the presence of what inputs are connected to the ADC 3250 OPT The DAC 3250 OPT also indicates the presence of a suitably encoded 270 Mb s stream If the optional opt
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33. tion to an ASI or SDI circuit Use of high quality coaxial cable such as Belden 8285 or equivalent is recommended 270 Mb s Optical Output An optical output is available via the rear assembly fibre optic connector The standard optical connector is an SC PC type of connector for connection to single mode fibre terminated with the same SC PC type of connector If unit is ordered with a different type of connector be sure that fibre is terminated with the suitable mating type of connector Audio Inputs Four high impedance balanced audio inputs are provided via phoenix style 3 pin plugs labelled as Left Audio 1 Right Audio 1 Left Audio 2 and Right Audio 2 As per standard audio wiring standards pin is ground pin 2 is and pin 3 is On board link settings allow direct connection to 600Q systems 3 2 4 GND 3250 ade amp 3250 dac ib rev3 doc Page 6 of 12 31 08 2007 Alarm Outputs Two relay alarm output states are provided via a phoenix style 4 pin plug Pin 1 is designated as Major pin 2 is designated as Minor and both pins 3 amp 4 are ground Although alarms are designated as Major and Minor it is probably better to think of them as Alarm 1 and Alarm 2 Alarm conditions are as follows Major switch to Open Circuit on no video input or loss of power Minor with on board switch SW1 1 on switch to Open Circuit on no audio input or loss of power with on board switch SW1 1 off and optional fibre driver board fi
34. tted switch to Open Circuit on laser failure or loss of power M e Lh 3 GND 2 Minor Major RS 232 Data Input The RS 232 data input port is via a 10 pin 14 style of header Pins 1 2 and 7 are connected together on the PCB Pins 9 and 10 are both earthed Pin 5 is the RS 232 request to send RTS connection and pin 6 is the RS 232 transmit data TXD connection Data rates may be up to 115200 Baud Note that data transfer is unidirectional only i e there is no direct data return path For connection to a standard RS 232 9 pin D connector wire as per the diagram below 9 PinD Connector TXD CTS Ribbon Cable DAC 3250 OPT 270 Mb s Input The DAC 3250 OPT Input port on the rear assembly is a 75Q terminated BNC connector for a 270 Mb s ADC 3250 OPT encoded signal only Use of high quality coaxial cable such as Belden 1505A 8281 or equivalent is recommended 270 Mb s Optical Input The optical input signal should be connected to the rear assembly fibre optic connector Ensure that link LK4 is fitted to use optical input rather than electrical coaxial input The standard optical connector is an SC PC type of connector for connection to single mode fibre terminated with the same SC PC type of connector If unit is ordered with a different type of connector be sure that fibre is terminated with the suitable mating type of connector Video Output The DAC 3250 OPT Video Out port on the rear
35. y 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 3250 adc amp 3250 dac ib rev3 doc Page 2 of 12 31 08 2007 IRT Eurocard Types ADC 3250 OPT amp DAC 3250 OPT Analogue Video amp Audio to 270 Mb s Fibre Optic Link General Description The ADC 3250 OPT and DAC 3250 OPT form an encoder decoder pair for converting an analogue video up to 4 channels of audio and an RS 232 data port to a 270 Mb s digital signal suitable for transport over ASI SDI paths This allows analogue signals to be passed through purely digital environments such as digital optical links and digital routers and switchers thus simplifying installations that are predominantly digital where some analogue signals still exist When used with IRT s fibre mux demux system both analogue and digital signals can be sent over the same link The ADC 3250 OPT encodes the analogue input signals to a 270 Mb s digital stream The inputs can either be a single video up to 4 channels of audio or a combination of video and audio There is also an RS 232 data input port which can be used concurrently with the video and audio or by itself The DAC 3250 OPT decodes the 270 Mb s digital stream to recover the original signals Front panel LED indic
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