Digitair Model 6680 - Ansaldo STS
Contents
1. Operating Temperature Range Storage Temperature Range Humidity Power Requirements DC Power 30 C to 50 C 55 C to 100 C 95 non condensing at 40 C 96 hour exposure 12 VDC to 15 VDC 2A Radio Transceiver Radio Frequencies Front to Rear Messages Rear to Front Messages Transmit Power Transmit Frequency Stability Emission Deviation at 1200 Hz Receive Sensitivity 12 dB SINAD Receive Frequency Stability Selectivity Intermodulation Immunity Spurious Rejection Image Rejection PC Diagnostic Interface Asynchronous Serial Data Rate Voltage Level 452 9375 Mhz Other frequencies available 457 9375 Mhz at customer request 2 Watts standard or 4 Watts requires 15 VDC 5 PPM 16KOF2D 3 3 KHz 0 45 uV max 10 PPM max 60 dB min 60 dB min 55 dB min 50 dB min 9600 Baud 1 Stop Bit 8 Data Bits EIA RS 232C Table 1 2 Repeater Specifications SM7068 12 97 Page 1 5 UNION SWITCH amp SIGNAL SECTION 2 0 INSTALLATION OF THE REPEATER This section describes the installation of the Repeater and how to connect power and a UHF antenna to the unit Configuration and verification of proper operation after power up are also discussed 2 1 Items Required for Installation and Configuration Items required to install the Repeater include the following Repeater Unit CIU type enclosure Power Cable either supplied with the Repeater or available separately2. 3 5 2 Repeat Only Normal Message Types The Repeater is typically used to relay standard AAR type EOT messages The Repeater also can be used to repeat non AAR defined messages such as those transmitted by US amp S Wayside Communication Unit WCU To select the type of message to be repeated type in 2 Repeat Only Normal Message Type and press lt Enter gt The following screen shows the currently selected setting US amp S End of Train System Diagnostic Unit Software 1 8 Copyright 1995 Union Switch Signal Inc Repeat Only Normal Message Types Current value is TRUE lt i gt Possible values are 8 FALSE 1 TRUE Enter a new value E back F4 i nOr Sc o To change the operational mode type in the menu item number and press lt Enter gt To return to the Main Configuration Menu press lt Esc gt 3 5 3 Use Radio Squelch The Repeater can use its transceiver squelch level in conjunction with the Carrier Detect signal to detect the presence of an EOT message It also can operate without squelch by hunting for the message sync bits that precede every message Operating the Repeater without squelch improves reception of weak radio signals when operating the unit in extreme cold temperatures To enable or disable the use of radio squelch type in 3 Use Radio Squelch and press lt Enter gt The following screen shows the currently selected setting US amp S End of Train System Diagno
3. 9 pin male to female serial computer cable The female connector type will be determined by the port on your PC Straight through male to female cables are commercially available 3 1 Digitair Diagnostic Software Digitair Diagnostic Software running on a PC provides a full set of menu driven configuration and diagnostic functions The diagnostic software is a single program named diagunit exe supplied on a floppy disk The software can be ordered under US amp S part number N451232 1264 3 5 disk or N451232 1265 5 25 disk NOTE This manual provides some examples of the diagnostic functions and provides detailed information on Repeater configuration Refer to Service Manual SM 7069 Shop Maintenance for detailed diagnostic information and procedures 3 2 Running the Diagnostic Software To run the diagnostic software perform the following 1 To gain access to the diagnostic port remove the Repeater s cover CAUTION The Repeater contains static sensitive components Always observe proper ESD handling procedures otherwise equipment damage may result Za With the diagnostic PC powered on execute the diagnostic software from the floppy disk or from the PC s hard disk if it has been copied there by typing diagunit followed by lt Enter gt 3 The following Diagnostic Start Up Screen will appear as shown The program name and version appear at the top of the screen The box at the bottom of the s
4. Diagnostic Software Disk Items to be supplied by user include Power Supply 12 VDC nominal for 2 Watt operation 15 VDC nominal for 4 Watt operation Ya Wave UHF Antenna terminated with an N type RF connector Grounding and Lightning protection as required Mounting hardware as appropriate for the particular installation location PC serial communications cable DB 9 type straight through male to female connectors 2 2 Model 6680 Repeater Unit Packaging Issues The Model 6680 Repeater Enclosure was designed to operate as an Head of Train Device HOTD Communication Interface Unit CIU and as such is packaged in an LSI compliant HOTD CIU enclosure For background purposes the HOTD CIU operates as an EOT Front End Unit and is meant to be rack mounted in a locomotive that is equipped with an Integrated Cab As such the package does not incorporate mounting tabs 2 3 Repeater Unit Installation The Repeater must be installed indoors or in a wayside hut or bungalow where it will be protected from wet weather conditions Securely mount the Repeater in an available location such as an empty equipment rack shelf using appropriate mounting hardware dependent on the location chosen It is recommended that the Repeater be installed so that its cover can be removed for easy access to the internal Diagnostic Connector and for adjustments 2 4 Power Supply Installation and Connections The power supply which is furnished by the us
5. a menu item number Esc go back Fi repeat selection To select an item from this menu type in a menu item number and press lt Enter gt To return to the Main Menu press lt Esc gt Page 3 4 SM7068 12 97 UNION SWITCH amp SIGNAL SECTION 3 0 CONFIGURATION AND DIAGNOSTICS 3 5 1 Enable High Power Transmit The Repeater normally transmits repeated EOT messages at 2 Watts RF power however it has the capability to transmit at a 4 Watt power level if required by the railroad To select the transmit power level type in 1 Enable High Power Transmit and press lt Enter gt The following screen shows the currently selected setting USAS End of Train System Diagnostic Unit Software 1 8 Copyright 1995 Union Switch amp Signal Inc Enable High Power Transmit Current value is OFF lt B gt Possible values are 8 OFF 1 ON Enter a new value The factory default setting is typically 0 for the 2 Watt power level To enable high power transmit at 4 Watts type in the menu item number and press lt Enter gt To return to the Main Configuration Menu press lt Esc gt NOTE 4 Watt Operation Operation at 4 Watts requires that the Repeater be powered from a 15 VDC source It may also require that the user apply for special licensing with the FCC to operate in excess of 2 watts Effective Radiated Power SM7068 12 97 Page 3 5 SECTION 3 0 CONFIGURATION AND DIAGNOSTICS UNION SWITCH 8 SIGNAL
6. 1 8 Copyright 1995 Union Switch Signal Inc Show Model And Version Show Rear to Front Message Statistics Clear Rear to Front Message Statistics Show Front to Rear Message Statistics Clear Front to Rear Message Statistics Transmitter Utilities Test Ram Test Rom Test EEProm Test Boot ROM Show Watchdog Timer Reset Count Clear Watchdog Timer Reset Count 1 2 3 4 5 6 8 9 8 1 2 1 1 1 Enter a menu item number Esc go back Fi repeat selection Select a diagnostic test from this menu by typing in a menu item number followed by lt Enter gt To return to the Main Menu press lt Esc gt NOTE The use of the Diagnostic Items is beyond the scope of this manual Each Diagnostic Item is described in detail in the Repeater Shop Maintenance Manual SM 7069 3 5 Configuration Items Menu The Configuration Items Menu displays selections that allow Repeater functions to be enabled or disabled and also allows customization of certain functions This section describes the purpose and use of each menu item as shown below in the Main Configuration Menu US amp S End of Train System Diagnostic Unit Software 1 8 Copyright 1995 Union Switch amp Signal Inc Enable High Power Transmit Repeat Only Normal Message Types Use Radio Squelch Select Id Which Will Not Be Repeated Enable Ping Pong Prevention Set Ping Pong Prevention Period z Enable Prevention of Repeating a Repeater Message Enter
7. AND DIAGNOSTICS 3 5 7 Enable Prevention of Repeating a Repeater Message US amp S Repeaters append a special repeater signature to each message relayed As such US amp S Repeaters can identify a message repeated by another US amp S Repeater This function when enabled prevents Ping Ponging between US amp S Repeaters To enable this function type in 7 Enable Prevention of Repeating a Repeater Message and press lt Enter gt The following screen shows the current setting US amp S End of Train System Diagnostic Unit Software 1 8 Copyright 1995 Union Switch amp Signal Inc Enable Prevention of Repeating a Repeater Message Current value is TRUE lt i gt Possible values are 8 FALSE 1 TRUE Enter a new value E o back quit program F4 Sc The factory default setting is True enabled and is the recommended setting To change the operational mode type in the desired menu item number and press lt Enter gt To return to the Main Configuration Menu press lt Esc gt SM7068 12 97 Page 3 9 UNION SWITCH amp SIGNAL APPENDIX A A 1 Repeater Software Upgrades The Repeater uses a FLASH type programmable non volatile memory chip as opposed to an EPROM chip to store its application software This eliminates the need to disassemble the unit and physically replace the EPROM in the event that software upgrades are issued Software upgrades are supplied by US amp S on a Repeater Executab
8. ONTENTS Section Subject Page 3 3 O A seele ee 3 3 3 4 Diagnostic Items ta ae innen Dep aio ass 3 4 3 5 Configuration Items Menti oitenta a EE Ao eia aa iron e ains 3 4 3 5 1 Enable High Power Transmit eesensseeeennneennessnnnennennennnennne nennen 3 5 3 5 2 Repeat Only Normal Message Types uuusnssessnnsessnneesnnensennennennennnnnnnn een 3 6 333 Use Radio Sauel heoi eee ala dida danita le sen 3 6 3 5 4 Select ID That Will Not Be Repeated ooooooocccioncccnooonononnncnonnnocononononnnnnanncnnnnnncnnos 3 7 3 5 5 Enable Ping Pong Prevention ussssssesessssnseessnneesnnennenneennnennnnneennensnnennnnnnenn 3 8 3 5 6 Set Ping Pong Prevention Period u 00sussnsnsessenssennnnnnennnnnnnennnnnen nn 3 8 3 5 7 Enable Prevention of Repeating a Repeater Message ooooooocncooccooncconcconnoconnnonnnonnos 3 9 Appendix A A l Repeater Software Upgrades uunnneesssseesssenssnnennnesnnnennnnneennnnnnnnnennnnennnennnenennnennsensnsnenssensnnsnann A 1 A 2 Flash Loader Pro Maita idad atada ihren Eep n aa EEE A 1 A 3 UMATA A A tt a lides A 1 A 4 Procedure for Downloading Repeater Software Upgrades oooonoocconococoocnnooncconcconnncnanocnnnnconnoronncnnnnnnos A 2 Tables and Figures Figure 1 1 Repeater UT dados 1 1 Table 1 1 Diagnostic Software DiSKk ooooooninnccinoccnincnnoonccnonnnnonnccnonnncononononononncnonannc nan na nnn EE 1 3 Figure 1 2 Repeater Hardware Assemblies ooooonocononcciononoonncooncnn
9. Ordering Information This section provides information on ordering the Model 6680 Repeater and related accessories Please contact US amp S Customer Service at 1 800 652 7276 or your US amp S Sales Representative for technical information pricing and additional sales information 1 4 1 Repeater Unit and Power Cable The Repeater is shipped together with a mating power cable per the following US amp S part numbers 1 Repeater Unit with power cable P N N24300101 2 Power Cable Only P N N24306001 1 4 2 Repeater Diagnostic and Configuration Software Disk The Repeater does not rely on a dedicated external device for system diagnostics or configuration All of the unit diagnostic tests and configuration functions are included on a Diagnostics Software Disk that runs on a standard DOS compatible personal computer PC which plugs into the Repeater s internal DB 9 style Diagnostic Port The Diagnostic Software has been designed to permit easy customization of the Repeater s operation Most of the variable default values and functions are user selectable set by the factory at purchase time or set by railway technicians via a personal computer The Diagnostic Software program on the disk is named diagunit exe and its use is described in Section 3 0 Configuration and Diagnostics The Diagnostic Software Disk can be ordered under the following part numbers 3 5 Diskette N451232 1264 5 25 Diskette N451232 1265 Table 1 1 D
10. SERVICE MANUAL 7068 645 Russell Street Batesburg SC 29006 Digitair Model 6680 END OF TRAIN REPEATER UNIT Communication Interface Unit CIU type Enclosure Installation Operation a An ANSALDO Signal Company December 1997 1997 Union Switch amp Signal Inc Printed in the U S A UNION SWITCH amp SIGNAL TABLE OF CONTENTS Section Subject Page 1 0 General Inform ti h lies 1 1 1 1 General Overview and Functional DescriptiON oooococionoccnononcnonnnonononnnonononnnn conan nnnnnnncnnos 1 1 1 1 1 Repeater Power Up ange seevanaabedcdeddensdeosandenasastaeds 1 2 1 1 2 Repeater Functions and Capabilities oooonocononccnonncconccnononononoconn conan nennen 1 2 1 2 Repeater Message Protocol Compatibility ooooonnnccniononinccnoncnonnnnnonoconn ccoo nnonano cano ncnnnnnnos 1 2 1 3 R A I L Team and Technical Support coooooccnococinoncoonnconnnononocnonccnnnnncon nn cono nonnnnconnrrnanannnnanos 1 2 1 4 Repeater Ordering Information uusseessseesssessnnessnnensnnnesnneennnennnneennennnneennnennsenen ern 1 3 1 4 1 Repeater Unit and Power Cable ooooooonococincccoocononancnonccnnnnnonnnononcnnanoncnn conan nennen 1 3 1 4 2 Repeater Diagnostic and Configuration Software Disk 1 3 1 4 3 Repeater Executable Software Disk usseeesseessnneennsensnneesnneennnensnnneenne nenn 1 3 1 5 Repeater Major Hardware Assemblies cccccscccssseeeseceesecesseeeeeeccnsaecesaesseecens
11. aded 6 Upon completion of the download the Repeater will begin running the new upgrade software in the normal fashion just as it does on standard power up The green STATUS indicator mounted on the Repeater s front panel should be flashing indicating that the new upgrade program is operating correctly Ps Unplug the serial cable from the Repeater and reinstall its cover The Repeater is now ready for operation Page A 2 SM7068 12 97
12. aeessseeneaees 1 4 1 6 Repeater Specifications dad dd ia aida de 1 5 2 0 Installation of the Repeater snenie r a e nn ran k a ei aE 2 1 2 1 Items Required for Installation and Configuration oooonooccnonnconcnconncconcconnnnnanaconnoconononananoss 2 1 22 Model 6680 Repeater Unit Packaging SSUES oooocinncccnoncccnoncnononcnononononanoncnnnn nora nnccnnnnnos 2 1 2 3 Repeater Unit Installation urssssssssesssneesnnsessnnennnnensnnnenennnnennennnnnennnensenneennsensnneenen 2 1 2 4 Power Supply Installation and Connections ueessessssssneennsennnnnesnnennenne nennen en 2 1 2 4 1 Repeater Transmit Power Level and Related Power Supply Requirements 2 2 2 5 Antenna Installation E a Ta aa a a E a a a E E ES 2 2 2 6 Repeater Power Up and Operational Verification eseessesesseererssessessessssssssesessessessesss 2 3 2 6 1 Repeater Configuration unssesesseesssesssnneennnneennennnnneennnennnnneennenennnennsnnennennnsnnenn 2 3 2 6 2 Basic Troubleshooting and Fuse Replacement cccccsscesseceeteceenseseeeeeeteensaes 2 3 3 0 Configuration and Diagnostics c cccesssesesecesneeeseeecesneeeeeeeeesaecseeeceseeeseaeeseseeeseaeeenseeseaeeesseeseneaeeess 3 1 3 1 Digitair Diagnostic Solw r ln an a a 3 1 3 2 Running the Diagnostic Software ooooocnncocioococonnnononcncnonononnccnnnnn noo n crono n nn nono nn rr nn ennsnennne 3 1 SM7068 12 97 Page i UNION SWITCH amp SIGNAL TABLE OF C
13. ble from the PC to the Unit Therefore the typical command line depending on the PC serial port being used will be load COM1 repeat hex r lt Enter gt ifPC serial port 1 is being used load COM2 repeat hex r lt Enter gt if PC serial port 2 is being used SM7068 12 97 Page A 1 UNION SWITCH amp SIGNAL A 4 Procedure for Downloading Repeater Software Upgrades To download Repeater software upgrades perform the following 1 On the PC copy the new Upgrade Version of the file repeat hex to the floppy disk or hard drive directory containing the Flash Loader Software load exe 2 Turn OFF power to the Repeater 3 Remove the Repeater s cover and connect one end of the serial cable to the Repeater s DIAG DB 9 connector and the other end to the PC s serial port either COMI or COM2 4 Turn ON power to the Repeater J On the PC type the load command for the Flash Loader as follows load COM1 repeat hex r lt Enter gt if PC serial port 1 is being used or load COM2 repeat hex r lt Enter gt if PC serial port 2 is being used The PC will display the progress of the download process as follows Cab Unit Flash Loader Rev 1 Thu Jul 18 16 11 41 EDT 1996 Press a key at any time to quit this program Initiating target diagnostics Cab Unit Boot Prom REV 1 Thu Jul 18 9 37 47 EDT 1996 ROM test PASSED RAM test PASSED Erasing flash done Writing to flash records downlo
14. cations 2 6 1 Repeater Configuration If required the user can configure the Repeater at this time To configure the Repeater remove its cover and follow the instructions provided in Section 3 0 Configuration and Diagnostics 2 6 2 Basic Troubleshooting and Fuse Replacement If the Repeater does not operate as described above check the following 1 Unplug the power cable connector from the Repeater Confirm proper pin assignments according to Section 2 4 and verify that correct DC voltage appears on the pins as listed in Table 2 0 2 Remove the Repeater s cover and check the fuses Replace the fuse s as required per Table 2 2 Fuse Designation Function of Fuse Fuse Rating F1 Radio Module 2 Amp 250 Volt 2 Watt Operation 3 Amp 250 Volt 4 Watt Operation Electronics 2 Amp 250 Volt Table 2 2 Fuse Functions and Ratings If the unit still does not operate properly it will require more detailed troubleshooting per Service Manual SM 7069 Shop Maintenance or must be sent out for repair SM7068 12 97 Page 2 3 UNION SWITCH amp SIGNAL SECTION 3 0 CONFIGURATION AND DIAGNOSTICS The Repeater incorporates a diagnostic port which is used to access the built in configuration and diagnostic functions This port is comprised ofa DB 9 type RS 232 C serial connector and is located on the processor board J6 inside the Repeater s enclosure The port connects to a DOS compatible PC via a standard straight through
15. creen displays any prompts for user input The last line shows applicable PC function keys SM7068 12 97 Page 3 1 SECTION 3 0 CONFIGURATION AND DIAGNOSTICS UNION SWITCH 8 SIGNAL US amp S End of Train System Diagnostic Unit Software 1 8 Copyright 1995 Union Switch amp Signal Inc To initiate diagnostics power up the Unit in normal operation connect a straight through cable from the PC to the Unit press the button on the Unit to start diagnostics mode Currently using COM port 1 Fi use COMi F2 use COM2 4 Connect the serial computer cable between the diagnostic PC and the Repeater s Diagnostic Port connector NOTE The Repeater s Diagnostic Port is permanently set for 9600 baud 8 data bits 1 stop bit and no parity The Diagnostic Software sets the PC s serial port to these same values therefore no configuration should be required 5 The Diagnostic Software defaults to PC serial port COM1 If use of COM2 is required press lt F2 gt to use COM2 Press lt F1 gt to return to COMI 6 Note that the Repeater has no switches or buttons To proceed power up the Repeater Ts The diagnostic PC will then display the Initial Diagnostic screen as follows US amp S End of Train System Diagnostic Unit Software 1 8 Copyright 1995 Union Switch amp Signal Inc 1 Start Main Program Diagnostics 2 Show Boot Prom Diagnostics Enter a menu item number o back Fi repeat selection 8 To quit t
16. ear Fourth ID Selection 1 2 3 4 5 6 7 8 Enter a menu item number o back Fi repeat selection To enter an ID Code or clear out a code that has already been stored type in the corresponding menu item number and press lt Enter gt Clearing a code sets it to 00000 note this is also the default factory setting for all four ID Codes Note that the valid range of ID Codes is 00000 through 99999 The screen below shows an example of ID Code 05000 entered for the first ID Code NOT to be repeated US amp S End of Train System Diagnostic Unit Software 1 8 Copyright 1995 Union Switch amp Signal Inc Select First ID Which Will Not Be Repeated Current value is 85888 Enter a new value Press lt Esc gt to return to the Select ID screen Press lt Esc gt a second time to return to the Main Configuration Menu SM7068 12 97 Page 3 7 SECTION 3 0 CONFIGURATION AND DIAGNOSTICS UNION SWITCH 8 SIGNAL 3 5 5 Enable Ping Pong Prevention When two or more EOT repeaters are within telemetry range the possibility exists for multiple repeats of the message back and forth from one repeater to another This is referred to as Ping Ponging and can jam up the EOT radio frequencies thereby interfering with the Arming process or with Communica tions Link Tests To enable or disable the use of Ping Pong Prevention type in 5 Enable Ping Pong Prevention and press lt Enter gt The following
17. er should be installed using the same care and techniques as those described for the Repeater The power cable which is provided is approximately 6 feet in length The power cable is supplied with a connector pre mounted on one end the other end is unterminated Plug the power cable connector into the Repeater s host interface connector Only two pins on the host interface connector are used Pin assignments and lead color codes are as shown in Table 2 0 SM7068 12 97 Page 2 1 UNION SWITCH amp SIGNAL SECTION 20 INSTALLATION OF THE REPEATER UNION SWITCH amp SIGNAL ES CAUTION Non standard cables or those supplied by the railroad may employ different color codes than those used by US amp S Refer to the connector pin assignments in this manual or consult US amp S Customer Service at 1 800 652 7276 for further technical assistance if required Cut the unterminated end of the cable to the desired length Strip and install whatever spade lug tab or other contact is required for the power supply Pin Conductor Power Cable Connector MS3106A 20 29S oD Ra Power Supply Positive 12 VDC or 15 VDC Note Other Pins Not Used for Repeater Application Table 2 0 Repeater Power Connections 2 4 1 Repeater Transmit Power Level and Related Power Supply Requirements The Repeater can be configured to operate at a standard 2 Watt transmit power level or at an increased high power transmit level of 4 Watts re
18. fer to Section 3 0 for configuration information The power supply requirements for the two levels are as follows Transmit Power Level Power Supply Requirements 2 Watts 12 VDC 2 Amps 4 Watts 15 VDC 2 Amps Table 2 1 Repeater Transmit Power Levels NOTE Special FCC Licensing may be required if 2 watts Effective Radiated Power ERP is exceeded Consult FCC Part 90 Rules and Regulations 2 5 Antenna Installation The antenna should be a Y4 wave UHF type unit with the required cable length terminated in an N style RF connector Connection to the Repeater simply involves plugging the N connector into the Repeater s front panel mounted antenna connector The user must provide adequate grounding and proper lightning protection for the Repeater Page 2 2 SM7068 12 97 UNION SWITCH amp SIGNAL SECTION 2 0 INSTALLATION OF THE REPEATER 2 6 Repeater Power Up and Operational Verification With the Repeater fully installed apply power to the unit Observe that the green STATUS indicator on the Repeater s front panel begins to flash and continues to flash indefinitely This indicates that the Repeater software is running and that the processor board is operational The Repeater is now ready for use As an additional measure if available use an RF Communication Monitor to verify that the Repeater is transmitting front to rear and rear to front EOT messages at the frequencies stated in Section 1 6 Repeater Specifi
19. he program at any time press lt F4 gt The program will prompt with Really quit Y N If Y is selected the program will terminate If N is selected the program will continue Page 3 2 SM7068 12 97 UNION SWITCH amp SIGNAL SECTION 3 0 CONFIGURATION AND DIAGNOSTICS 9 To access the primary diagnostic configuration screen type 1 Start Main Program Diagnostics and press lt Enter gt The following screen will appear Start Main Program Diagnostics Proceeding to run program in flash Press Esc to get to the new main menu Press lt Esc gt to proceed to the Main Menu Also observe that the Repeater s green STATUS light begins to flash indicating that the main application program is now running 3 3 Main Menu To select one of the submenus associated with Diagnostic Items or Configuration Items type the desired menu item and press lt Enter gt US amp S End of Train System Diagnostic Unit Software 1 8 Copyright 1995 Union Switch amp S l Inc 1 Diagnostic Items 2 Configuration Items Enter a menu item numb Esc go back Fi repeat selection SM7068 12 97 Page 3 3 SECTION 3 0 CONFIGURATION AND DIAGNOSTICS UNION SWITCH amp SIGNAL 3 4 Diagnostic Items This Diagnostic Items Menu displays selections that may show information about or perform a diagnostic test on specific elements of the Repeater US amp S End of Train System Diagnostic Unit Software
20. iagnostic Software Disk 1 4 3 Repeater Executable Software Disk The Repeater uses a FLASH type programmable non volatile memory chip to store its application software This eliminates the need to disassemble the unit and physically replace an EPROM memory chip in the event that software upgrades are issued The Repeater Executable Software disk allows the user to download software upgrades when issued into the Repeater s internal FLASH memory This disk contains two files 1 the latest upgrade version of the Repeater executable software named repeat hex and 2 the Cab Unit Flash Loader program named load exe The use of this disk is described in Appendix A The Repeater Executable Software disk is available on a 3 5 diskette under US amp S Part Number N45 1232 1637 SM7068 12 97 Page 1 3 UNION SWITCH amp SIGNAL SECTION 1 0 GENERAL INFORMATION 1 5 Repeater Major Hardware Assemblies Figure 1 2 shows the Repeater with its cover removed exposing its major hardware assemblies and the location of the Diagnostic Connector Processor Board Radio Transceiver Front Panel Diagnostic Connector Interface Board Figure 1 2 Repeater Hardware Assemblies Page 1 4 SM7068 12 97 UNION SWITCH amp SIGNAL 1 6 Repeater Specifications Parameter Physical Overall Dimensions Weight Environmental SECTION 1 0 GENERAL INFORMATION Specification H 9 25 W 2 50 D 11 60 4 Ibs
21. le Software Disk containing two files 1 the latest upgrade version of the Repeater executable software named repeat hex and 2 the Flash Loader program named load exe This is a 3 5 disk and is available under US amp S Part Number N451232 1637 Software upgrades are downloaded into the Repeater s Flash memory from a PC connected to the unit s internal DIAG connector via the same 9 pin D type serial cable used for performing diagnostics The download function is performed by running the Flash Loader Software as detailed in the following sections A 2 Flash Loader Program The Flash Loader program is named load exe and runs on a DOS compatible PC Although this program may be run from the floppy disk drive it is preferable to copy it to a directory on the PC s hard drive The new upgrade version of repeat hex must reside on the same floppy disk or hard drive directory containing load exe A 3 Using load exe Atthe PC DOS prompt the command syntax for load exe can be viewed by typing in load followed by lt Enter gt The PC will display the command structure as follows Cab Unit Flash Loader Rev 1 Thu Jul 18 16 11 41 EDT 1996 Usage load lt serial port gt lt filename gt r where lt serial port gt is COM1 or COM2 lt filename gt is the executable to be loaded in Motorola Exormax format r means run the program after loading optional Use a straight through ca
22. ononoonccnnnnncon nn con crono nn non nrrnan nennen 1 4 Table 1 2 Repeater Sp cifications viciado 1 5 Table 2 0 Repeater Power Connections oooocoooccoonccoonccoonnononocnnnnonanonconoronnn corn ron n nono nr ron n ron n nennen nn 2 2 Table 2 1 Repeater Transmit Power Levels usennseesssesssseennessnneennnennnnnennennnennennenn essen nennen 2 2 Table 2 2 Fuse Functions and Ratings 0 cccccccccsscccssecesseccesseeseeeceseeeeseeesneeenaeeseeeeseeeeeeessneeentaeenes 2 3 Page ii SM7068 12 97 UNION SWITCH amp SIGNAL SECTION 1 0 GENERAL INFORMATION This manual provides information on the installation and operation ofthe DIGITAIR Model 6680 End of Train Repeater Unit Refer to Service Manual SM 7069 for detailed Shop Maintenance information 1 1 General Overview And Functional Description The primary purpose of the DIGITAIR Repeater Unit is to relay End of Train EOT telemetry messages from the rear of the train to the front of the train and vice versa i e from the EOT End Unit to the EOT Cab Unit and vice versa The Repeater is typically used in areas where radio signals are weak due to surrounding terrain conditions or where there exists RF dead spots such as in many train yards As such the Repeater should be installed in a strategic location where it will provide maximum radio coverage in the area in which it will be used The Repeater is housed in a single Communication Interface Unit CIU type enclos
23. screen shows the currently selected setting US amp S End of Train System Diagnostic Unit Software 1 8 Copyright 1995 Union Switch amp Signal Inc Enable Ping Pong Prevention Current value is TRUE lt i gt Possible values are 8 FALSE 1 TRUE Enter a new value E back F4 i Progr sc Oo The factory default setting is True enabled and is the recommended setting To change the operational mode type in the desired menu item number and press lt Enter gt To return to the Main Configuration Menu press lt Ese gt 3 5 6 Set Ping Pong Prevention Period The Repeater accomplishes Ping Pong Prevention by looking at each message received and discarding identical messages The Ping Pong Prevention Period is the duration of time that the Repeater will discard identical messages To set the Ping Pong Prevention Period type in 6 Set Ping Pong Prevention Period and press lt Enter gt The following screen shows the current value in seconds US amp S End of Train System Diagnostic Unit Software 1 8 Copyright 1995 Union Switch amp Signal Inc Set Ping Pong Prevention Period Current value is 3 seconds Enter a new value Sc The factory default value is 3 seconds To change the prevention period type in the desired value and press lt Enter gt To return to the Main Configuration Menu press lt Ese gt Page 3 8 SM7068 12 97 UNION SWITCH amp SIGNAL SECTION 3 0 CONFIGURATION
24. stic Unit Software 1 8 Copyright 1995 Union Switch amp Signal Inc Use Radio Squelch Current value is TRUE lt 1 gt Possible values are 8 FALSE 1 TRUE Enter a new value E back F4 i nOg SC o To change the operational mode type in the desired menu item number and press lt Enter gt To return to the Main Configuration Menu press lt Esc gt Page 3 6 SM7068 12 97 UNION SWITCH amp SIGNAL SECTION 3 0 CONFIGURATION AND DIAGNOSTICS 3 5 4 Select ID That Will Not Be Repeated The Repeater can be programmed with up to four EOT ID Codes that will not be repeated i e blocked out This helps reduce yard radio traffic by allowing the user to block out Test EOTs beacons or similar equipment often used in yards It is desirable not to re broadcast messages transmitted by these devices via the Repeater To select the ID Code of the message not to be repeated type in 4 Select ID Which Will Not Be Repeated and press lt Enter gt The following screen shows the options to either select and or clear each of the four ID Codes US amp S End of Train System Diagnostic Unit Software 1 8 Copyright 1995 Union Switch amp Signal Inc Select First ID Which Will Not Be Repeated Clear First ID Selection Select Second ID Which Will Not Be Repeated Clear Second ID Selection Select Third ID Which Will Not Be Repeated Clear Third ID Selection Select Fourth ID Which Will Not Be Repeated Cl
25. ure as depicted in Figure 1 1 The unit is powered from an external DC power source via a power cable that plugs into its front panel mounted Host Interface connector Connection to a UHF wave antenna is accomplished via the Repeater s front panel mounted N type RF antenna connector Communication Interface Unit CIU Enclosure Status Indicator yr Type Antenna Connector REPEATER Carrying Handle Host Interface Connector Figure 1 1 Repeater Unit SM7068 12 97 Page 1 1 UNION SWITCH amp SIGNAL SECTION 1 0 GENERAL INFORMATION 1 1 1 Repeater Power Up The Repeater has no power switch it is meant to be operational at all times The unit is powered on when a DC power source is applied to its Host Interface connector The unit then indicates that it is operational by continuously flashing its green STATUS indicator 1 1 2 Repeater Functions and Capabilities The Repeater hardware is designed using the latest in microcontroller technology making it an intelligent device capable of performing several powerful functions in addition to its main function of relaying EOT messages These are configurable via a serial connection from the Repeater to a standard PC and include the following e Built in diagnostics Selection of normal 2 Watts transmission or high power 4 Watts transmission as required e Ability to repeat only normal EOT messages or by configuration to repeat special messages t
26. ypes used for other applications Can be programmed to NOT repeat i e block out up to 4 EOT ID Codes This helps reduce radio traffic in yards where EOT beacons or test EOTs have been installed Functions can be enabled to prevent multiple repeats of the same EOT message when two or more Repeaters are operating within telemetry range of each other This is commonly referred to as ping pong prevention These and other functions are described in Section 3 0 Configuration and Diagnostics 1 2 Repeater Message Protocol Compatibility The Model 6680 Repeater is compatible with all EOT equipment employing existing protocols such as the American Association of Railroads AAR End of Train message protocol It meets or exceeds the guidelines of the AAR as well as the Federal Railroad Administration FRA the Federal Communications Commission FCC and Industry Canada IC regulations 13 R A I L Team and Technical Support The Rapid Action Information Link R A I L Team is comprised of experienced product and application engineers ready to assist and resolve any technical issues concerning DIGITAIR End of Train equipment or any US amp S product Any questions regarding the contents of this Service Manual should be directed to the R A LL Team via telephone at 1 800 652 7276 or via Internet e mail at railteam switch com Page 1 2 SM7068 12 97 UNION SWITCH amp SIGNAL SECTION 1 0 GENERAL INFORMATION 1 4 Repeater
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