User Manual 2 - IRT Communications
Contents
1. The STM 1 input port on the rear assembly is a 75Q terminated BNC connector for an MMM 4680 encoded signal only Use of high quality 75Q coaxial cable Belden 8281 or equivalent is recommended ASI Outputs Four ASI outputs are provided as 75Q output BNC connectors Each ASI output has a payload rate and packet size equivalent to the corresponding ASI input on the matching MMM 4680 Each ASI output may be configured as either burst or continuous mode Switch SW4 1 sets ASI 1 output mode switch SW4 2 sets ASI 2 output mode switch SW4 3 sets ASI 3 output mode and switch SW4 4 sets ASI 4 output mode With the switch position OFF the ASI output is in Continuous mode With the switch position ON the ASI output is in Burst mode Alarm Outputs Two relay alarm output states are provided via a phoenix style 4 pin plug Pin 3 is designated as Major pin 4 is designated as Minor and both pins 1 amp 2 are ground Both alarms are referenced to ground Alarm conditions are as follows Major switch to Open Circuit on no valid STM 1 input present Minor switch to Open Circuit on no valid output ASI streams present Both Major and Minor alarms switch to Open Circuit on power failure Note that in order for alarms to operate switch SW4 8 must be set to the ON position MMX 4680 Rear Assembly Connections ALARM O P STM 1 I P ASI 1 O P ASI 2 O P ASI 3 O P ASI 4 O P DATA O P 4680 mmm amp 4680 mmx ib rev3 doc Page 8 of 11 18 12 2007 RS2. Dimensions Technical Specifications 4x ASI C 75Q 800 mVp p BNC connector Combined 148 Mb s RS232 Uni directional data input 1 x G 703 75Q BNC connector CMI encoded 155 52 Mb s Open circuit on sum of ASI input payload rates in excess of maximum allowable 148Mb s or loss of power Open circuit on no valid input ASI streams present or loss of power 1 x G 703 75Q BNC connector CMI encoded 155 52 Mb s 4x ASI C 75Q 800 mVp p BNC connector same as MMM 4680 input rate RS232 Uni directional data output Open circuit on no valid STM 1 input present or loss of power Open circuit on no valid output ASI streams present or loss of power 28 Vac CT 14 0 14 or 16 Vdc 6 VA 0 50 C ambient Suitable for mounting in IRT 19 rack chassis with input output and power connections on the rear panel Grey silk screened black lettering amp red IRT logo Detachable silk screened PCB with direct mount connectors to Eurocard and external signals 6 HP x 3 Ux 220 mm IRT Eurocard Due to our policy of continuing development these specifications are subject to change without notice 4680 mmm amp 4680 mmx ib rev3 doc Page 4 of 11 18 12 2007 Configuration MMM 4680 The only user settings on the MMM 4680 is on the DIP switch SW4 as shown below SW4 1 Not used rE 2 SW4 2 Not used E 3 SW4 3 OFF non invert NRZ output ON invert NRZ output W 4 sw4 4 OFF CMI output
3. standard electrical ON Optical standard NRZ output W 5 sw4 s Not used W 6 sw4 6 Not used WL 7 SW4 7 Not used L 8 Sw4 s OFF Output alarms non operational ON Output alarms operational F MMX 4680 The only user settings on the MMX 4680 is on the DIP switch SW4 as shown below F S E 1 SW4 1 OFF ASI 1 O P in Continuous mode ON ASI 1 O P in Burst mode rE 2 SW4 2 OFF ASI 2 O P in Continuous mode ON ASI 2 O P in Burst mode E 3 SW4 3 OFF non invert NRZ input ON invert NRZ input 4 SW4 4 OFF Receive CMI input ON Receive NRZ input ME 5 sw4 s OFF ASI 3 O P in Continuous mode ON ASI 3 O P in Burst mode ME 6 sw4 6 OFF ASI 4 O P in Continuous mode ON ASI 4 O P in Burst mode M17 sw4 7 Not used C 8 Sw4 s OFF Output alarms non operational ON Output alarms operational 4680 mmm amp 4680 mmx ib rev3 doc Page 5 of 11 18 12 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 f
4. 232 Data Output The RS 232 data output port is via a 10 pin HE14 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 transmit data TXD connection Data transfer is unidirectional only 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 TXD 4680 mmm amp 4680 mmx ib rev3 doc Page 9 of 11 18 12 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 1 GND 1 GND 2 GND O 2 GND 3 MAJOR 3 MAJOR 4 MINOR MMX 4680 4 MINOR 1 1 O MMM 4680 Ties son on Ir ASI1 ASI2 ASI3 AsI4 DATA INPUT ASI1 Asi2 ASI3 Asi4 DATA OUTPUT 4680 mmm amp 4680 mmx ib rev3 doc Page 10 of 11 18 12 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 suitab
5. 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 Type MMM 4680 amp MMX 4680 4 ASI to STM 1 Combiner DeCombiner Designed and manufactured in Australia IRT can be found on the Internet at http www irtelectronics com 4680 mmm amp 4680 mmx ib rev3 doc Page 1 of 11 18 12 2007 IRT Eurocard Type MMM 4680 amp MMX 4680 4 ASI to STM 1 Combiner DeCombiner Instruction Book Table of Contents Section Page Operational Safety 2 General Description 3 Technical Specifications 4 Configuration 5 Installation 6 Front and rear layouts 10 Maintenance amp Storage 11 Warranty amp Service 11 Equipment return 11 This instruction book applies to units later than S N 0712015 Operational Safety WARNING Operation of electronic equipment involves the use of voltages and currents that may be dangerous to human life Note that under certain conditions dangerous potentials may exist in some circuits when power controls are in the OFF position Maintenance personnel should observe all safety regulations Do not make any adjustments inside equipment with power ON unless proper precautions are observed All internal adjustments should only be made by suitably qualified personnel All operational a
6. djustments are available externally without the need for removing covers or use of extender cards 4680 mmm amp 4680 mmx ib rev3 doc Page 2 of 11 18 12 2007 IRT Eurocard Type MMM 4680 amp MMX 4680 4 ASI to STM 1 Combiner DeCombiner General Description MMM 4680 MMX 4680 ASI 1 Output Mux amp Signal Processing 2x STM 1 Outputs Processing amp De Mux re The MMM 4680 and MMX 4680 are part of a family of data transcoders for converting between the commonly used MPEG2 Transport Stream formats for video distribution in the broadcast industry With the MMM 4680 up to four ASI and one RS232 data signal can be combined together and converted into a 155Mb s G 703 STM 1 electrical signal The sum of the ASI input payload rates can be anything up to 148 Mb s Inputs may be 188 or 204 byte packet length burst or continuous and may have energy dispersal scrambling interleaving and or Reed Solomon bytes included An individual input may be up to 148Mb s if the other inputs are unused The MMX 4680 separates the 155 Mb s G 703 signal back into the original four ASI signals at their original rates and the RS232 data signal The ASI outputs are suitable for Single Frequency Network use in that there is no data rate conversion or PCR restamping of the ASI streams Inputs are automatically equalised for lengths of up to 250m of Belden 8281 or equivalent cable RS232 uni directional data ma
7. 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 SN Gy ee ena 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 4680 mmm amp 4680 mmx ib rev3 doc Page 11 of 11 18 12 2007
8. ly 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 conditions under which the fault
9. r equivalent should be used No adjustments are required but cable must be terminated in 75Q at the connected load Alarm Outputs Two relay alarm output states are provided via a phoenix style 4 pin plug Pin 3 is designated as Major pin 4 is designated as Minor and both pins 1 amp 2 are ground Both alarms are referenced to ground Alarm conditions are as follows Major switch to Open Circuit on sum of ASI input payload rates in excess of maximum allowable 148Mb s Minor switch to Open Circuit on no valid input ASI streams present Both Major and Minor alarms switch to Open Circuit on power failure Note that in order for alarms to operate switch SW4 8 must be set to the ON position 4680 mmm amp 4680 mmx ib rev3 doc Page 6 of 11 18 12 2007 MMM 4680 Rear Assembly Connections ASI 1 I P ASI 2 I P ASI 3 I P SK11 IN2 ASI 4 I P SK10 IN4 STM 1 O P 1 STM 1 O P 2 DATA I P RS 232 Data Input The RS 232 data input port is via a 10 pin HE14 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 Data rates may be up to 38k4 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 Pin D Connector RXD 4680 mmm amp 4680 mmx ib rev3 doc Page 7 of 11 18 12 2007 MMX 4680 STM 1 Input
10. use 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 Farthing 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 MMM 4680 ASI Inputs Four ASI inputs each with any payload rate up to a maximum combined total payload of 148 Mb s That is Total payload 148Mb s maximum ASI 1 rate ASI 2 rate ASI 3 rate ASI 4 rate WARNING If the total maximum payload rate is exceeded all ASI channels will be corrupted ASI inputs may be of 188 or 204 byte packet length burst or continuous mode and may have scrambling interleaving and Reed Solomon bytes if desired ASI inputs are by BNC connectors each terminated in 75Q Input cable equalisation is automatic for up to 250m of high quality 75Q coaxial cable Belden 8281 or equivalent No adjustments are required STM 1 Outputs Two identical STM 1 outputs are provided by BNC connectors with a 75Q characteristic output impedance Only high quality 75Q coaxial cable Belden 8281 o
11. y also be sent on the same link It can pass rates up to 38kb s with any combination of start stop amp parity bits The data rate does not affect the payload available for the ASI streams Front panel indication and relay alarm on the MMM 4680 transmitter shows if there is an input data rate violation Corresponding alarm on the MMX 4680 receiver shows a loss of STM 1 input The MMM 4680 and MMX 4680 are 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 Standard features e Upto 4 ASI and 1 Data stream on one 155 Mb s STM 1 G 703 link Automatic Input equalisation up to 250m Suitable for Single Frequency Network SFN use Recovers transmitted ASI signal without any added PCR jitter and with minimal user setup Maintains original ASI rate packet size amp coding energy dispersal scrambling interleaving or Reed Solomon bytes e Eurocard format 4680 mmm amp 4680 mmx ib rev3 doc Page 3 of 11 18 12 2007 MMM 4680 Inputs Type 1 Maximum Data Rate Type 2 Output Type Electrical Characteristics Data Rate Alarm Output MAJOR MINOR MMX 4680 Input Type Electrical Characteristics Data Rate Outputs Type 1 Data Rate Type 2 Alarm Output MAJOR MINOR Power Requirements Power consumption Other Temperature range Mechanical Finish Front panel Rear assembly
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