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SMS-758 Modem Protection Switch

Theory of Operation

MN/SMS758 Rev. 3

4–5

The functions for the error response switches, SW1-6, -7, and -8 are described in
Table 4-1. Table 4-2 lists the different software versions required for each switch
function.

Summary of Contents for SMS-758

Page 1: ...witch Modem Protection Switch Modem Protection Switch Modem Protection Switch Installation and Operation Manual Installation and Operation Manual Installation and Operation Manual Installation and Ope...

Page 2: ......

Page 3: ...Switch Modem Protection Switch Modem Protection Switch Modem Protection Switch Installation and Operation Manual Installation and Operation Manual Installation and Operation Manual Installation and Op...

Page 4: ...specifically disclaims the implied warranties of merchantability and fitness for particular purpose Exclusive Remedies The remedies provided herein are the buyer s sole and exclusive remedies EFData C...

Page 5: ...switch Organization This manual includes the following chapters and appendixes Chapter 1 describes the unit s purpose function and specifications Chapter 2 describes the installation process Chapter...

Page 6: ...this Manual Screen Output and Command Syntax A distinctive type of font is used for screen output and command syntax which looks like this This line is in monospace font Notes Note This is the style...

Page 7: ...MIL STD 118 114A which provides electrical and functional characteristics of the unbalanced and balanced voltage digital interface circuits applicable to both long haul and tactical communications Spe...

Page 8: ...t for repair or replacement 1 Request a Return Material Authorization RMA number from the EFData Customer Service Department Be prepared to supply the Customer Service representative with the model nu...

Page 9: ...rnal Connections 2 4 2 4 1 Data I O 2 5 2 4 2 External RS485 and RS232 Interface J1 and J2 2 6 2 4 3 Modem Control RS485 2 6 2 4 4 On Line Status J4 J5 2 7 2 4 5 Relay Remote Fault J6 2 8 2 4 6 Downli...

Page 10: ...Menu 3 10 3 2 2 5 Demodulator Delay 3 11 3 2 2 6 Modulator Delay 3 11 3 2 3 Modem Configuration 3 12 3 2 3 1 Prime and Backup Modem Configuration 3 12 3 2 3 2 Modem Configuration Menu 3 12 3 2 3 3 Mo...

Page 11: ...5 4 6 2 2 Connector Pinouts 4 16 4 6 3 V 35 RS 232 Interface Switch 4 19 4 6 3 1 Electrical Specifications 4 20 4 6 3 2 Connector Pinouts 4 21 4 6 3 2 1 V 35 Option 4 21 4 6 3 2 2 RS 232 Option 4 22 4...

Page 12: ...Battery Faults 5 2 5 2 Fault Isolation 5 3 5 2 1 Modulator Operation 5 3 5 2 2 Demodulator Operation 5 4 5 2 3 M N Operation 5 5 5 2 4 Battery 5 6 5 3 Module Replacement 5 7 5 3 1 Power Supply 5 7 5...

Page 13: ...kup Demodulator Configuration Status A 8 A 3 4 2 Modulator Status A 9 A 3 4 3 Demodulator Status A 9 A 3 4 4 Prime Modem Fault Status A 9 A 3 4 5 Backup Modem Fault Status A 10 A 3 4 6 Firmware Versio...

Page 14: ...B 7 B 3 3 1 Prime Modem Address B 7 B 3 3 2 Backup Modem Address B 7 B 3 3 3 Prime Modem Interface Type B 7 B 3 3 4 Backup Modem Interface Type B 8 B 3 4 Status Commands Responses B 8 B 3 4 1 Configur...

Page 15: ...5 8 1 Modulator Operational Faults Status B 15 B 3 5 8 2 Demodulator Operational Faults Status B 15 B 3 5 8 3 M N Switch Fault Status Summary B 16 B 3 5 8 4 Missing Parameter Faults B 16 B 3 5 8 5 Bu...

Page 16: ...Table of Contents SMS 758 Modem Protection Switch xii MN SMS758 Rev 3 This page is intentionally left blank...

Page 17: ...h limits the loss of communication 1 2 Purpose and Function The switch is a fully automated self contained switching unit for many EFData satellite data modems including SDM 650B SDM 308B SDM 309B SDM...

Page 18: ...re of the modems and dual backups Automatic configuration greatly reduces setup time 1 3 Description The switch is complete and self contained in a standard 19 rack mountable enclosure weighing approx...

Page 19: ...nfigurations are stored in battery backed memory devices for protection against power loss A block diagram of the switch is shown in Figure 1 5 F1 8 SMS 758 M ODEM PROTECTIO N SW ITCH SW 1 00 PRESS NE...

Page 20: ...Introduction SMS 758 Modem Protection Switch 1 4 MN SMS758 Rev 3 Figure 1 2 System Block Diagram...

Page 21: ...ntroduction MN SMS758 Rev 3 1 5 POWER SUPPLY SLOT 1 SLOT 3 SWITCH DRIVER SLOT 6 ONLINE TELEMETRY SLOT 5 MONITOR AND CONTROL SLOT 4 ADDRESS DEC DRV SLOT 2 NOT USED SLOT 7 POWER SUPPLY 2 Figure 1 3 SMS...

Page 22: ...OD 3 MOD 4 INPUTS BACKUP DEMOD 2 DOWNLINK 4 DOWNLINK 3 DOWNLINK 2 DOWNLINK 1 IF 5 IF 6 IF 7 IF 8 BU MOD 1 MOD 5 MOD 6 MOD 7 MOD 8 INPUTS INPUTS BACKUP DEMOD 1 DEMODULATOR SWITCH DOWNLINK 4 DOWNLINK 3...

Page 23: ...SMS 758 Modem Protection Switch Introduction MN SMS758 Rev 3 1 7 Figure 1 5 SMS 758 Block Diagram...

Page 24: ...A1 A2 A3 A4 J1 J1 J1 J1 TERR DATA SWITCH A5 A6 A7 A8 J1 J1 J1 J1 A5 A6 A7 A8 A9 A10 J2 J2 J2 J2 TX IF RX IF TX IF RX IF 2 3 7 8 1 2 J26 J36 J24 J25 75 75 75 7 8 BACKUP MOD INPUTS J34 J35 75 75 75 DOWN...

Page 25: ...p Interface Switch AS 0894 2 Optional V 35 Prime Interface Switch AS 0891 8 Optional V 35 Backup Interface Switch AS 0892 2 Optional RS 422 Prime Interface Switch AS 0890 8 Optional RS 422 Backup Inte...

Page 26: ...downlink connections Uplinks Eight modulator outputs may be externally combined divided for any number of uplinks Prime Modulator to Output Loss Less than 1 dB Backup Modulator to Prime Output Loss L...

Page 27: ...delay configuration and fault menus Alarm Reporting Controller Fault Alarm System Fault Alarm Demodulator Fault Alarm Form C relay contact to indicate controller or power supply failure Form C relay...

Page 28: ...Introduction SMS 758 Modem Protection Switch 1 12 MN SMS758 Rev 3 This page is intentionally left blank...

Page 29: ...ns containing foam spacing for maximum shipping protection To remove the switch CAUTION Do not use any cutting tool that will extend more than 1 into the container and cause damage to the modem 1 Cut...

Page 30: ...he rear panel Refer to Section 2 4 for connector pinouts placement and function 4 Open the front panel and verify that the two power supplies and four circuit modules are properly seated in the upper...

Page 31: ...wnlink option connect J16 backup 2 output to J7 and specify 7 downlinks 1 backup in the System menu Note Be sure to terminate all unused IF outputs and downlink inputs with the supplied 75 BNC termina...

Page 32: ...J17 DOWN LINK J7 1 2 J1 J2 RS485 EXTERNAL J3 90 264 VAC RS232 RS485 MODEM CONTROL OFF LINE IF OUTPUTS 2 J27 1 2 3 J28 J29 J30 MOD 4 5 6 J31 J32 DEMOD IF OUTPUTS BACKUP MOD INPUTS 7 8 J33 J34 J35 J36...

Page 33: ...J28 through J35 BNC IF Outputs to Uplinks AC POWER J37 J38 CEE22 AC Power Input DC POWER J37 J38 Terminal Block 48 VDC Power Input GROUND J39 10 32 Stud Chassis Ground Note All unused BNC connectors m...

Page 34: ...The external interface connectors are 9 pin female D connectors with screw locks for mechanical security The remote connector is a DCE interface RS 485 RS 232C Pin Number Name Pin Number Name 1 GND 1...

Page 35: ...mechanical security for the mating connector ON LINE STATUS INTERFACE Pin J4 Name J5 Name 1 Mod 1 COM Demod 1 COM 2 Mod 1 NC Demod 1 NC 3 Mod 1 NO Demod 1 NO 4 Mod 2 COM Demod 2 COM 5 Mod 2 NC Demod 2...

Page 36: ...C 3 Controller Fault NO 4 Relay Remote Input 0 5 Relay Remote Input 1 6 Relay Remote Input 2 7 Relay Remote Input 3 8 Demodulator Fault COM 9 Demodulator Fault NC 10 Demodulator Fault NO 11 M N Fault...

Page 37: ...ough J25 J18 through J25 are the prime modulator IF input connections to the Modulator IF switching matrix They connect to the prime modem IF outputs The input frequency range is 50 to 180 MHz with an...

Page 38: ...rds connect AC power to the two power supplies Normal input voltage is 90 to 264 VAC self adjusting at 47 to 63 Hz Maximum power consumption is 40W It is recommended that each power supply be plugged...

Page 39: ...atus at a glance A 16 key keypad to the right allows the operator to perform setup configuration and operation functions An audible beeper signals the pressing of a keypad key The display LEDs and bee...

Page 40: ...lt occurs BATTERY Red LED Lights if the M C battery voltage is low Status POWER ON Green LED Lights when power is applied to the switch AUTO Green LED Lights when the switch is in the automatic operat...

Page 41: ...r PREV keys The switch beeps in response to keypad inputs One beep acknowledges a valid entry with the appropriate action being taken Two beeps indicate that the entry was invalid and no action was ta...

Page 42: ...Operation SMS 758 Modem Protection Switch 3 4 MN SMS758 Rev 3 Figure 3 2 SMS 758 Display Map Sheet 1 of 2...

Page 43: ...SMS 758 Modem Protection Switch Operation MN SMS758 Rev 3 3 5 Figure 3 2 SMS 758 Display Map Sheet 2 of 2...

Page 44: ...ETUP menu the operator views system configuration parameters by using the NEXT and PREV keys The operator can also enter data or change a parameter through keypad entries When all data or changes for...

Page 45: ...that information into memory 3 2 1 4 Active Prime Demodulators Menu This menu displays the current prime demodulators that are active in the system Pressing the keys 1 through 8 will toggle the activ...

Page 46: ...etup configuration enter the MODEM SETUP menu by pressing F2 The MODEM SETUP functions are as follows INTERFACE Interface type is selected and displayed for each modem DOWNLINK Downlink assignment 1 t...

Page 47: ...e operator enters the number associated with the interface type and presses ENT to load the selected interface information into memory Selections may only be made from the displayed options If no inte...

Page 48: ...or enters 1 2 or 3 and presses ENT the information is loaded into memory If nothing is entered the priority will be low The backup algorithm uses priority levels to make backup decisions When a backup...

Page 49: ...y If nothing is entered the switch automatically defaults to 3 automatic 3 2 2 6 Modulator Delay The Modulator Delay menu displays the current online delay for this prime modulator and allows the oper...

Page 50: ...ystem must have its own unique address The interface type baud rate parity and addresses are selected on the M C card in the modem See the appropriate section of the modem installation and operation m...

Page 51: ...OR response results in an M N fault Note When any change is made in the prime or backup modem configuration the operator must reload that modem s configuration into the switch If this is not done a co...

Page 52: ...OMM FAILURE Where X 1 to 2 CONFIG VERIFY ERROR M or D X Where X 1 to 8 CONFIG VERIFY ERROR BM or BD X Where X 1 to 2 BK UP M or D X NOT COMPATIBLE Where X 1 to 2 PRIME M or D X NOT COMPATIBLE Where X...

Page 53: ...operating mode at power up if the switch was not programmed for a different mode prior to loss of power or if the battery backed memory was not maintained The switch is not capable of performing any s...

Page 54: ...programs it if necessary 2 If more than one demodulator is faulted the switch selects the demodulator with the highest priority If more than one faulted demodulator is set to the highest priority the...

Page 55: ...yed in the status display if modem switch firmware is used Continue to Step 4 4 At the end of the modulator delay the switch again checks the fault status of the prime modulator a If the prime modulat...

Page 56: ...GRAM B U s FOR HIGHEST PRIORITY CHANNEL s SERIAL REMOTE NOT AVAILABLE PLACE B U s IN STAND BY MODE INDICATE WITH ON FRONT PANEL IS A LOWER PRIOIRTY PRIME B U D IS A NON FLT D PRIME B U D PROGRAM B U W...

Page 57: ...ER TIMED OUT ARE OTHER PRIMES FLT D PROGRAM B U s FOR HIGHEST PRIORITY CHANNEL s SERIAL REMOTE NOT AVAILABLE PLACE B U s IN STAND BY MODE INDICATE WITH ON FRONT PANEL IS A LOWER PRIOIRTY PRIME B U D I...

Page 58: ...number from 0 to 8 0 takes the backup modulator or demodulator offline 1 to 8 selects that prime for backup Press ENT The switch performs the selected function and displays the online and fault statu...

Page 59: ...ted an F alternates with the modem number on the display The display shows online backup modulators and demodulators with an arrow pointing to the number of the prime being backed up Hot Standby mode...

Page 60: ...Operation SMS 758 Modem Protection Switch 3 22 MN SMS758 Rev 3 This page is intentionally left blank...

Page 61: ...ation in the chassis The M C gathers status and provides extensive fault monitoring The M C monitors the switch configuration and updates other modules within the switch as required Switch configurati...

Page 62: ...atus gathering The 80C31 microcontroller supports a serial asynchronous communications channel RS 232C with a maximum baud rate of 9600 bit s using the 5 5295 MHz reference A rechargeable battery main...

Page 63: ...switch connects to an RS 485 remote communication link To communicate on this link each unit must have a unique address between 1 and 255 0 cannot be a device address as it is the global address for...

Page 64: ...module allows it to retain configuration and status information for up to 30 days without prime power M C module jumper JP6 connects battery power from the backup RAM During normal operation this jump...

Page 65: ...tion Switch Theory of Operation MN SMS758 Rev 3 4 5 The functions for the error response switches SW1 6 7 and 8 are described in Table 4 1 Table 4 2 lists the different software versions required for...

Page 66: ...Interrupt Arbitration The SMS 758 switch does not use the external I O interrupt arbitration function JP12 JP13 and JP14 must be in the LEFT position to disable this function 4 2 Modem Control Interfa...

Page 67: ...t the first time it is sent The following section describes the commands that can be executed 4 3 1 Command Structure A command to the switch consists of three or four words sent on the four parallel...

Page 68: ...with the START word This word restarts the message sequence Table 4 6 shows some relay remote command examples Table 4 3 Relay Remote Command Words Input Lines Command Word REM3 REM2 REM1 REM0 START...

Page 69: ...ace backup demodulator 1 online when it precedes a target word or offline when it precedes EXECUTE BACKUP DEMOD 2 Executed only from REMOTE mode This function is used to place backup demodulator 2 onl...

Page 70: ...1 Controller fault A controller fault is a catastrophic failure that renders the switch non functional A timer on the M C periodically sets a monostable multivibrator which controls the fault relay T...

Page 71: ...the online status of the switch The M C commands the online telemetry module to report online status for all active prime modulators and demodulators The status is reported as form C relay contacts to...

Page 72: ...S 422 449 and MIL STD 188 114 RS 449 Interface Switch The RS 422 449 and MIL STD 188 114 RS 449 interface switch module switches all interface signals by relay The prime interface switch module Figure...

Page 73: ...me Pin Signal Ground SG 1 19 20 37 Send Data SD A 4 SD B 22 Send Timing ST A 5 ST B 23 Receive Data RD A 6 RD B 24 Request To Send RS A 7 RS B 25 Receiver Timing RT A 8 RT B 26 Clear To Send CS A 9 CS...

Page 74: ...ERGIZED POSITION CONNECTING THE TERRESTRIAL DATA AND PRIME MODEM CONNECTORS TOGETHER STANDBY S B SIGNALS ARE ROUTED TO THE OFFLINE BACKUP MODEM TRANSMIT CLOCK RECEIVE DATA RECEIVE CLOCK TRANSMIT DATA...

Page 75: ...TH SELECTION TRANSMIT CLOCK TRANSMIT DATA RECEIVE DATA RECEIVE CLOCK RECEIVE EXTERNAL REFERENCE CLOCK MOD AND DEMOD FAULTS DECODER INSTRUCTION BACKUP DATA I O DATA SWITCH MOTHERBOARD MOD RELAYS DEMOD...

Page 76: ...0 on the right side When the prime interface switch module or the M N switch itself is powered down or in the default position all signals are routed between the terminal equipment and the prime modem...

Page 77: ...A B Transmit Data SD A P SD B S Serial Clock Transmit SCT A Y SCT B a AA Receive Data RD A R RD B T Request To Send RTS C Serial Clock Receive SCR A V SCR B X Clear To Send CTS D Data Set Ready DSR E...

Page 78: ...OWN IN THE NON ENERGIZED POSITION CONNECTING THE TERRESTRIAL DATA AND PRIME MODEM CONNECTORS TOGETHER STANDBY S B SIGNALS ARE ROUTED TO THE OFFLINE BACKUP MODEM TRANSMIT CLOCK RECEIVE DATA RECEIVE CLO...

Page 79: ...ev 3 4 19 DATA PATH SELECTION TRANSMIT CLOCK TRANSMIT DATA RECEIVE DATA RECEIVE CLOCK RECEIVE EXTERNAL REFERENCE CLOCK MOD AND DEMOD FAULTS DECODER INSTRUCTION BACKUP DATA I O DATA SWITCH MOTHERBOARD...

Page 80: ...interface switch module slots A1 through A8 on the left side of the lower rear panel The backup interface can plug into either A9 or A10 When the prime interface switch module or the M N switch itself...

Page 81: ...e RD SCR SCT SD SCTE 0 55V peak 20 differential into 100 Amplitude CTS DSR RLSD 10 5V into 5000 2000 Impedance RD SCR SCT 100 20 Impedance SD SCTE 100 10 Impedance RTS 5000 2000 2500 pF DC Offset RD S...

Page 82: ...d 7 B Ground 14 P Send Data A 2 S Send Data B 25 U Serial Clock Transmit External A 24 W Serial Clock Transmit External B 18 Y Serial Clock Transmit A 15 a AA Serial Clock Transmit B 16 R Receive Data...

Page 83: ...onnector Pin Signal Name Direction Circuit 1 Ground AA 7 Ground AB 2 Transmitted Data IN BA 15 Transmission Signal Element Timing OUT DB 3 Received Data OUT BB 4 Request to Send IN CA 17 Receiver Sign...

Page 84: ...RELAYS ARE SHOWN IN THE NON ENERGIZED POSITION CONNECTING THE TERRESTRIAL DATA AND PRIME MODEM CONNECTORS TOGETHER STANDBY S B SIGNALS ARE ROUTED TO THE OFFLINE BACKUP MODEM TRANSMIT CLOCK RECEIVE DA...

Page 85: ...4 25 DATA PATH SELECTION TRANSMIT CLOCK TRANSMIT DATA RECEIVE DATA RECEIVE CLOCK RECEIVE EXTERNAL REFERENCE CLOCK MOD AND DEMOD FAULTS DECODER INSTRUCTION BACKUP DATA I O DATA SWITCH MOTHERBOARD MOD...

Page 86: ...emale D connectors on the prime and one on the backup The prime interface switch module can plug into any prime interface switch module slot A1 through A8 on the left side of the lower rear panel The...

Page 87: ...4 poles 4 6 4 2 Connector Pinouts The DS 1 and G 703 interface uses a 15 pin female D connector accessible from the switch rear panel Screw locks provide mechanical security for the mating connector...

Page 88: ...ARE SHOWN IN THE NON ENERGIZED POSITION CONNECTING THE TERRESTRIAL DATA AND PRIME MODEM CONNECTORS TOGETHER STANDBY S B SIGNALS ARE ROUTED TO THE OFFLINE BACKUP MODEM RECEIVE DATA TRANSMIT DATA RECEIV...

Page 89: ...SMS758 Rev 3 4 29 DATA PATH SELECTION TRANSMIT DATA RECEIVE DATA RECEIVE EXTERNAL REFERENCE CLOCK MOD AND DEMOD FAULTS DECODER INSTRUCTION BACKUP DATA I O DATA SWITCH MOTHERBOARD MOD RELAYS DEMOD REL...

Page 90: ...er rear panel Note The AS 0896 backup interface switch module can only plug into slot A9 When the prime interface switch module or the M N switch itself is powered down or in the default position all...

Page 91: ...DR interface uses a 50 pin female D connector Screw locks provide mechanical security of the mating connector Signal Function Name Pin Ground 1 2 Send Data SD A SD B 34 18 Receive Data RD A RD B 36 20...

Page 92: ...15 ADPCM 1 Audio In A1I A A1I B 45 29 ADPCM 1 Audio Out A1O A A1O B 46 30 ADPCM 2 Audio In A2I A A2I B 47 31 ADPCM 2 Audio Out A2O A A2O B 48 32 Demod Fault Relay DF C DF NO 16 50 Modulator Fault MF...

Page 93: ...TANDBY S B SIGNALS ARE ROUTED TO THE OFFLINE BACKUP MODEM TRANSMIT DATA RECEIVE DATA RECEIVE ESC TRANSMIT ESC RECEIVE EXTERNAL REFERENCE CLOCK MOD AND DEMOD FAULTS DATA SWITCH MOTHERBOARD INSTRUCTION...

Page 94: ...en the prime interface switch module or the M N switch itself is powered down or in the default position all signals are routed between the terminal equipment and the prime modem Modulator and or demo...

Page 95: ...r AS 0896 modules 4 6 6 3 Connector Pinouts The 2 N IDR interface uses a 50 pin female D connector Screw locks provide mechanical security of the mating connector Signal Function Name Pin Ground 1 2 S...

Page 96: ...1I B 45 29 ADPCM 1 Audio Out A1O A A1O B 46 30 ADPCM 2 Audio In A2I A A2I B 47 31 ADPCM 2 Audio Out A2O A A2O B 48 32 Demod Fault Relay DF C DF NO 16 50 Modulator Fault MF 49 Demodulator Fault DF 33 D...

Page 97: ...WN IN THE NON ENERGIZED POSITION CONNECTING THE TERRESTRIAL DATA AND PRIME MODEM CONNECTORS TOGETHER STANDBY S B SIGNALS ARE ROUTED TO THE OFFLINE BACKUP MODEM TRANSMIT DATA RECEIVE DATA RECEIVE ESC T...

Page 98: ...Rev 3 DATA PATH SELECTION TRANSMIT ESC TRANSMIT DATA RECEIVE DATA RECEIVE ESC RECEIVE EXTERNAL REFERENCE CLOCK MOD AND DEMOD FAULTS DECODER INSTRUCTION BACKUP DATA I O DATA SWITCH MOTHERBOARD MOD REL...

Page 99: ...prime interface switch module or the M N switch itself is powered down or in the default position all signals are routed between the terminal equipment and the prime modem Modulator and or demodulato...

Page 100: ...3 Connector Pinouts The 2 N IBS interface uses a 50 pin female D connector Screw locks provide mechanical security of the mating connector Signal Function Name Pin Ground GND 1 2 T1 E1 Send Data T1E1...

Page 101: ...DATA I O RX B U 1 AND B U 2 DATA PATH SELECTION RX S B RX NOTE THE RELAYS ARE SHOWN IN THE NON ENERGIZED POSITION CONNECTING THE TERRESTRIAL DATA AND PRIME MODEM CONNECTORS TOGETHER STANDBY S B SIGNAL...

Page 102: ...Rev 3 DATA PATH SELECTION TRANSMIT DATA TRANSMIT ESC RECEIVE DATA RECEIVE ESC RECEIVE EXTERNAL REFERENCE CLOCK MOD AND DEMOD FAULTS DECODER INSTRUCTION BACKUP DATA I O DATA SWITCH MOTHERBOARD MOD REL...

Page 103: ...peration Jumper Pins Comments Normal JP1 5 through 6 7 through 8 13 through 14 15 through 16 Independent RST and CTS Special JP1 1 through 2 3 through 4 9 through 10 11 through 12 CTS tied to RTS TXD...

Page 104: ...S Jumper Diagram Table 4 8 Backup IBS Jumpers Operation Jumper Pins Comments Normal JP1 5 through 6 7 through 8 13 through 14 15 through 16 Independent RST and CTS Special JP1 1 through 2 3 through 4...

Page 105: ...Outputs Controller Fault Form C System Fault Form C Demod Signal Fault Form C 4 7 2 Theory of Operation The address decoder driver interfaces the M C data bus address bus control lines and serial inte...

Page 106: ...TA BUS BUFFER INTERNAL CONTROL BUS M N FAULT 3 3 DMD SYSTEM FAULT FAULT CONTROL RELAY REMOTE INTERFACE 4 MUX 1 RS 485 RS 232 DSR RXD TXD EXT INTERFACE CONTROL 20 PRIME AND FAULT INPUTS BACKUP MODEM IN...

Page 107: ...e 5V 12V 4 8 2 Theory of Operation The M C uses the address decoder driver with an 8 bit data bus and 1 device select line to control the switch driver The switch driver decodes commands from the M C...

Page 108: ...witches that comprise the IF switching matrix Each baseball switch is controlled separately by the M C card via the switch driver card The modulator section of the switching matrix contains 16 of the...

Page 109: ...2 MOD 3 MOD 4 INPUTS BACKUP DEMOD 2 DOWNLINK 4 DOWNLINK 3 DOWNLINK 2 DOWNLINK 1 IF 5 IF 6 IF 7 IF 8 BU MOD 1 MOD 5 MOD 6 MOD 7 MOD 8 INPUTS INPUTS BACKUP DEMOD 1 DEMODULATOR SWITCH DOWNLINK 4 DOWNLIN...

Page 110: ...nd demodulator Refer to Figure 4 23 for a block diagram of the online telemetry module 4 10 1 Specifications Number of Channels 8 modulator and 8 demodulator Switching Format Form C contacts 4 10 2 Th...

Page 111: ...y of Operation MN SMS758 Rev 3 4 51 Figure 4 22 Online Telemetry MOD 1 ONLINE STATUS DEMOD 1 ONLINE STATUS CONTROL BUS 16 INSTRUCTION LATCH RELAY DRIVER MOD 8 ONLINE STATUS DEMOD 8 ONLINE STATUS Figur...

Page 112: ...on the front of the frame or so the red part of the switch is visible The switch is fully functional with only one power supply turned ON but an M N fault will indicate that the other power supply is...

Page 113: ...occurs when a modulator backup operation fails The cause of the failure can be one of the following More failed modulators than available backups No compatible backup available All backups in use and...

Page 114: ...ing modem address specification A missing modem interface specification A missing demodulator downlink specification High or low 12V power supply High or low 12V power supply High or low 5V power supp...

Page 115: ...ins be sure to perform the steps in the order listed 5 2 1 Modulator Operation Faults Procedures BK UP FAULT MOD X MOF_BU_OP_FLT_x If no M N faults exist Verify that the switch is in AUTO mode Verify...

Page 116: ...he correct connectors If an M N fault exists Check M N faults for communication configuration and compatibility faults ALL DMDS D L X FAULTED DL_FLT_y Verify that the downlink assignments for the demo...

Page 117: ...is compatible with the backup or prime modem NO ADDRESS FOR PRIME or BK UP X NO_ADX_ B x Enter the address for the indicated modem in the system setup menu of the switch NO INTERFACE FOR PRIME or BK...

Page 118: ...4 Battery Faults Procedures M C BATTERY FAULT M C_BAT_FLT Check the position of the internal battery jumper on the M C board Check the battery for bent or displaced leads The NiCad battery on the M C...

Page 119: ...r and or demodulator will go offline possibly interrupting service when power is lost The following sections describe the procedure for removal and replacement of the modules Refer to Figure 1 3 for m...

Page 120: ...the upper front section of the switch 1 Turn OFF both power supplies 2 Rotate the card ejector to extract the module 5 3 4 Address Decoder Driver The address decoder driver module is located in slot 4...

Page 121: ...t 5 4 1 Return Instructions Refer to the preface for more information 5 4 2 Repacking Instructions The switch and manual are shipped packaged in pre formed reusable foam inside a cardboard carton Any...

Page 122: ...Maintenance SMS 758 Modem Protection Switch 5 10 MN SMS758 Rev 3 This page is intentionally left blank...

Page 123: ...al Remote controls and status information are transferred via an RS 485 optional RS 232C serial communications link For RS 232C communication switch SP1 5 on the M C module must be turned ON Commands...

Page 124: ...message This character is for commands for responses A 2 2 Device Address The device address is the address of the one switch which is designated to receive a transmitted command or which is respondi...

Page 125: ...nd syntax add ER4_SWITCH NOT IN REMOTE MODE cr lf Switch not in remote error use the MODE command to go to remote mode add ER5_HARD CODED PARAMETER cr lf Error message indicating that the parameter is...

Page 126: ...cr lf Where x 1 to 8 prime modulator number yyy YES or NO A 3 1 2 BackupModulator Active Command add MA_Bx_yyy cr Response add MA_Bx_yyy cr lf Status Only add MA_Bx cr Response add MA_Bx_yyy cr lf Whe...

Page 127: ...sponder option A 3 2 3 Backup Demodulator Active Command add DA_Bx_yyy cr Response add DA_Bx_yyy cr lf Status Only add DA_Bx cr Response add DA_Bx_yyy cr lf Where x 1 or 2 backup demodulator number yy...

Page 128: ...em number yyy 1 to 255 backup modem address A 3 3 3 Prime Modem Interface Type Command add INT_x_y cr Response add INT_x_y cr lf Status Only add INT_x cr Response add INT_x_y cr lf Where x 1 to 8 prim...

Page 129: ..._x_yyy y cr lf Where x 1 to 8 prime modem number yyy y 5 to 127 time in increments of 5 seconds AUTO or NONE A 3 4 Status Commands Responses A 3 4 1 Configuration Status A 3 4 1 1 Prime Modulator Conf...

Page 130: ...lock of data to be returned by the SMS 758 The block of data reflects the stored configuration of the demodulator selected Command add DCS_x cr Response add DCS_x cr DA_yyy cr Demod Active YES NO MP_y...

Page 131: ..._B1_yyy cr MOD_B2_yyy cr lf Where yyy OK or FLT A 3 4 3 Demodulator Status The demodulator status is returned as a block of data which provides basic status information of all active demodulators B1 a...

Page 132: ...d VER_x xxx cr lf Where x xxx Firmware version number A 3 4 7 Equipment Type This command returns the equipment type polled and the software version Command add ET_ cr Response add ET_xxx_yyy cr lf Wh...

Page 133: ...758 to enter the specified mode Command add MODE_yyyyyy cr Response add MODE_yyyyyy cr Status Only add MODE_ cr Response add MODE_yyyyyy cr lf Where yyyyyy REMOTE LOCAL AUTO or BYPASS A 3 5 4 Set Back...

Page 134: ...T Command add LMC_ALL cr Response add LMC_ALL cr MOD_1_yyy cr DMD_1_yyy cr MOD_2_yyy cr DMD_2_yyy cr MOD_3_yyy cr DMD_3_yyy cr MOD_4_yyy cr DMD_4_yyy cr MOD_5_yyy cr DMD_5_yyy cr MOD_6_yyy cr DMD_6_yy...

Page 135: ...to the last loaded configuration s A 3 5 6 1 Verify All Active Modems Configurations This command verifies all the active modems configurations and returns status Command add VMC_ALL cr Response add...

Page 136: ...Operational Status Commands Faults A 3 5 7 1 Modulator Operational Faults Status Command add MOF_ cr Response add MOF_ cr BU_OP_FLT_xxxxxxxx cr lf Backup operation faults see Note Where x 1 to 8 prime...

Page 137: ...ult see Note M C_BAT_FLT cr M C battery fault see Note ADX_BAT_FLT cr Address Decoder Driver battery fault see Note PARAMETER S _MISSING cr lf Missing parameter fault use MPF command to determine faul...

Page 138: ...ult Bit 2 Prime modulator 4 fault Bit 1 Prime modulator 5 fault Bit 0 Prime modulator 6 fault Character b Modulator fault status character 2 Bit 6 1 always Bit 5 Prime modulator 7 fault Bit 4 Prime mo...

Page 139: ...ulator 4 backup operational fault Bit 1 Prime demodulator 5 backup operational fault Bit 0 Prime demodulator 6 backup operational fault Character h Demodulator operational fault status character 2 Bit...

Page 140: ...odulator 8 configuration verify fault Bit 3 Backup demodulator 1 configuration verify fault Bit 2 Backup demodulator 2 configuration verify fault Bit 1 Reserved Bit 0 Reserved Character n Modulator co...

Page 141: ...it 6 1 always Bit 5 No configuration for prime modulator 1 fault Bit 4 No configuration for prime modulator 2 fault Bit 3 No configuration for prime modulator 3 fault Bit 2 No configuration for prime...

Page 142: ...dem 1 fault Bit 2 No address specified for backup modem 2 fault Bit 1 Reserved Bit 0 Reserved Character z Missing parameters fault status character 7 Bit 6 1 always Bit 5 No interface specified for pr...

Page 143: ...m 6 communications fault Character ae Modem communications faults character 2 Bit 6 1 always Bit 5 Prime modem 7 communications fault Bit 4 Prime modem 8 communications fault Bit 3 Backup modem 1 comm...

Page 144: ...Remote Control Operation SMS 758 Modem Protection Switch A 22 MN SMS758 Rev 3 This page is intentionally left blank...

Page 145: ...the remote control communications link as US ASCII encoded character strings The remote communications link is operated in a half duplex mode Communications on the remote link are initiated by a remo...

Page 146: ...witch which is designated to receive a transmitted command or which is responding to a command Valid device addresses are 1 to 3 characters long and in the range of 1 to 255 Address 0 is reserved as a...

Page 147: ...ommand syntax add ER4_SWITCH NOT IN REMOTE MODE cr lf Switch not in remote error use the MODE command to go to remote mode add ER5_HARD CODED PARAMETER cr lf Error message indicating that the paramete...

Page 148: ...1 to 8 prime modulator number yyy YES or NO B 3 1 2 Prime Modulator Priority Command add MP_x_y cr Response add MP_x_y cr lf Status Only add MP_x cr Response add MP_x_y cr lf Where x 1 to 8 y 1 2 or 3...

Page 149: ...r NO B 3 2 Demodulator Configuration Commands Responses B 3 2 1 Prime Demodulator Active Command add DA_x_yyy cr Response add DA_x_yyy cr Status Only add DA_x cr Response add DA_x_yyy cr lf Where x 1...

Page 150: ...definition of downlink transponder option B 3 2 4 Prime Demodulator Online Delay Command add DD_x_yyy y cr Response add DD_x_yyy y cr lf Status Only add DD_y cr Response add DD_x_yyy y cr lf Where x...

Page 151: ...rime modem address B 3 3 2 Backup Modem Address Address 0 may be used to clear the address field of modem x Command add ADD_Bx_yyy cr Response add ADD_Bx_yyy cr lf Status Only add ADD_Bx cr Response a...

Page 152: ...causes a block of data to be returned by the SMS 758 The block of data reflects the stored configuration of the modulator selected Command add MCS_x cr Response add MCS_x cr MA_yyy cr mod active YES...

Page 153: ...SMS 758 Modem Protection Switch Remote Control Operation MN SMS758 Rev 3 B 9 Where x 1 or 2 backup modem number...

Page 154: ...4 Backup Demodulator Configuration Status The Demodulator Configuration Status command causes a block of data to be returned by the SMS 758 The block of data reflects the stored configuration of the...

Page 155: ...yy cr DMD_6_yyy cr DMD_7_yyy cr DMD_8_yyy cr DMD_B1_yyy cr DMD_B2_yyy cr lf Where yyy OK or FLT B 3 4 4 Prime Modem Fault Status Command add MFS_x cr Response add MFS_x cr MOD_xxx cr mod status OK FLT...

Page 156: ...Command add TIME_hh mmyy cr Response add TIME_hh mmyy cr lf Status Only add TIME_ cr Response add TIME_hh mmyy cr lf Where hh hour mm minute yy AM or PM Example Set switch 67 time to 10 45PM Command...

Page 157: ...ent x the specified backup modulator is offline or will be taken offline Command add MOL_By_x cr Response add MOL_By_x cr lf Status Only add MOL_By cr Response add MOL_By_x cr lf Where y 1 or 2 backup...

Page 158: ...T Command add LMC_ALL cr Response add LMC_ALL cr MOD_1_yyy cr DMD_1_yyy cr MOD_2_yyy cr DMD_2_yyy cr MOD_3_yyy cr DMD_3_yyy cr MOD_4_yyy cr DMD_4_yyy cr MOD_5_yyy cr DMD_5_yyy cr MOD_6_yyy cr DMD_6_yy...

Page 159: ...to the last loaded configuration s B 3 5 7 1 Verify All Active Modems Configurations This command verifies all the active modems configurations and returns status Command add VMC_ALL cr Response add...

Page 160: ...ional Status Commands Faults B 3 5 8 1 Modulator Operational Faults Status Command add MOF_ cr Response add MOF_ cr BU_OP_FLT_xxxxxxxx cr lf Backup operation faults see Note below Where x 1 to 8 prime...

Page 161: ...e PS2_FLT cr power supply 2 fault see Note M C_BAT_FLT cr M C battery fault see Note PARAMETER S _MISSING cr lf Missing parameter fault use MPF command to determine faults see Note Where x 1 to 8 prim...

Page 162: ...t Bit 4 Prime modulator 8 fault Bit 3 Backup modulator 1 fault Bit 2 Backup modulator 2 fault Bit 1 Reserved Bit 0 Reserved Character c Demodulator fault status character 1 Bit 6 1 always Bit 5 Prime...

Page 163: ...link 1 fault Bit 2 All demodulators on downlink 2 fault Bit 1 All demodulators on downlink 3 fault Bit 0 All demodulators on downlink 4 fault Character i Demodulator operational fault status character...

Page 164: ...modulator 2 compatibility fault Bit 3 Prime modulator 3 compatibility fault Bit 2 Prime modulator 4 compatibility fault Bit 1 Prime modulator 5 compatibility fault Bit 0 Prime modulator 6 compatibili...

Page 165: ...ulator 6 fault Character u Missing parameters fault status character 2 Bit 6 1 always Bit 5 No configuration for prime modulator 7 fault Bit 4 No configuration for prime modulator 8 fault Bit 3 No con...

Page 166: ...No interface specified for prime modem 3 fault Bit 2 No interface specified for prime modem 4 fault Bit 1 No interface specified for prime modem 5 fault Bit 0 No interface specified for prime modem 6...

Page 167: ...nications fault Bit 4 Prime modem 8 communications fault Bit 3 Backup modem 1 communications fault Bit 2 Backup modem 2 communications fault Bit 1 Reserved Bit 0 Reserved B 3 5 9 Downlink Transponder...

Page 168: ......

Page 169: ...is a rear panel sticker for the 7 downlink option that displays the proper rear panel connectors and J numbers To install the 7 downlink sticker 1 Remove the 10 nuts from the downlink inputs and backu...

Page 170: ...tors Name Ref Desig Connector Type Function D L SWITCH INPUT J7 BNC DOWNLINK SWITCH INPUT D L SWITCH OUTPUT J16 BNC DOWNLINK SWITCH OUTPUT DOWNLINK INPUTS J8 to J10 J12 to J15 BNC DOWNLINK IF INPUTS B...

Page 171: ...connectors J8 through J10 are the downlink inputs 5 through 7 When the 7 downlink option is not being used connectors J8 through J10 are downlink inputs to backup modem 1 Downlink inputs that are not...

Page 172: ...7 Downlink Option SMS 758 Modem Protection Switch C 4 MN SMS758 Rev 3 This page is intentionally left blank...

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