EMS Technologies Canada A781 A781 Satcom Transceiver User Manual MN 1394 10078

EMS Technologies Canada, Ltd. A781 Satcom Transceiver MN 1394 10078

A781 User Manual

23-15-30 TITLE PAGE T-116 APR 10ARINC 781 SDU, SCM, and FMPASystem Description, Installation, and Maintenance ManualMN-1394-10078, Revision 001This document provides procedures for the equipment listed below.Model Part NumberARINC 781 Satellite Data Unit 1394-A-1100ARINC 781 Flange Mounted High Power Amplifier 1394-A-1200ARINC 781 SDU Configuration Module 1394-A-1300
23-15-30 TITLE PAGE T-216 APR 10PROPRIETARY STATEMENTThis document contains information which is proprietary and confidential to EMS Aviation (EMS Technologies Canada, Ltd., Formation Inc., Sky Connect LLC). Neither this document nor the information contained within may be used for any purpose other than the purpose for which it was prepared. Neither this document nor the information contained within may be disclosed or copied without the prior written permission of EMS Aviation.© 2010 EMS Technologies Canada, Ltd., Formation Inc., Sky Connect LLC. All Rights Reserved.ARINC 781 SDU, SCM, and FMPA System Description, Installation, and Maintenance ManualDocument Number: MN-1394-10078, Revision 001Revision TableRevision ECR Description001 N/A First release.Windows® is a registered trademark of Microsoft Corporation in the United States and other countries. Other product, brand, service, and company names herein are the trademarks of their respective owners.Our products are under continuous research and development. Any information may therefore be changed without prior notice. EMS Aviation reserves the right to make improvements or changes in the product described in this manual at any time without notice. While reasonable efforts have been made in the preparation of this document to assure its accuracy, EMS Aviation assumes no liability resulting from any errors or omissions in this document, or from the use of the information contained herein. Printed in Canada.EMS Aviation400 Maple Grove Road, Ottawa, Ontario, K2V 1B8, CANADAEMS Aviation Reception: (613) 591-9064EMS Aviation Product Support: (888) 300-7415 (calls are routed to an on-call Product Support specialist after regular business hours)+44 1684 290 020 (UK)(613) 591-3086 (outside North America)EMS Aviation E-mail Help: support@emsaviation.comEMS Aviation Web site: www.emsaviation.comEMS Aviation Sales and Marketing: 800-600-9759
23-15-30 CR-116 APR 10CUSTOMER RESPONSE FORMTo help us improve the quality of our product documentation, EMS Aviation would appreciate your comments and suggestions on this publication. Please complete the following customer survey and send to EMS Aviation at:EMS Aviation 400 Maple Grove Road Ottawa, ON K2C 0P9E-mail: techdocs@emsaviation.comPublication information:Publication number: MN-1394-10078Publication title: ARINC 781 SDU, SCM, and FMPA System Description, Installation, and Maintenance ManualLatest issue date: 16 APR 10Document revision: 001Customer information:Name:Company:Tel:Fax:Email:Comments and suggestions:Date:Comments:
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SYSTEM DESCRIPTION, INSTALLATION, AND MAINTENANCE MANUALARINC 781 SDU, SCM, and FMPA23-15-30 RR-116 APR 10RECORD OF REVISIONSWhen revisions are received, insert revised pages, record the date, and initial.Revision NumberIssue DateDate InsertedInserted by (initial)Revision NumberIssue DateDate InsertedInserted by (initial)
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SYSTEM DESCRIPTION, INSTALLATION, AND MAINTENANCE MANUALARINC 781 SDU, SCM, and FMPA23-15-30 SBL-116 APR 10SERVICE BULLETIN LISTService Bulletin Number Subject Manual Rev. NumberManual Rev. Date
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SYSTEM DESCRIPTION, INSTALLATION, AND MAINTENANCE MANUALARINC 781 SDU, SCM, and FMPA23-15-30 LEP-116 APR 10LIST OF EFFECTIVE PAGES* An asterisk indicates pages changed, added, or deleted by the current revision.F indicates a right foldout page with a blank back.Section Page Date
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SYSTEM DESCRIPTION, INSTALLATION, AND MAINTENANCE MANUALARINC 781 SDU, SCM, and FMPA23-15-30 TC-116 APR 10TABLE OF CONTENTSINTRODUCTION1. Illustration of Equipment .............................................................................INTRO-12. Acronyms and Abbreviations......................................................................INTRO-23. Safety Advisories .........................................................................................INTRO-4SYSTEM DESCRIPTION1. Inmarsat System Overview................................................................................... 1-12. Equipment Overview............................................................................................. 1-2A. SDU ................................................................................................................................. 1-3B. SCM ................................................................................................................................. 1-3C. FMPA ............................................................................................................................... 1-43. Equipment Specifications.....................................................................................1-44. System Interfaces.................................................................................................. 1-7A. SDU ................................................................................................................................. 1-8B. SCM ................................................................................................................................. 1-9C. FMPA ............................................................................................................................... 1-95. User Interfaces..................................................................................................... 1-10A. MCDU ............................................................................................................................1-10B. 4-Wire Audio .................................................................................................................. 1-10C. Ethernet ......................................................................................................................... 1-10D. POTS .............................................................................................................................1-10E. CEPT-E1 ........................................................................................................................ 1-11F. ISDN ............................................................................................................................... 1-11G. Maintenance Port ........................................................................................................... 1-11H. LEDs .............................................................................................................................. 1-11I. Self-Test Button ............................................................................................................... 1-116. Software Description...........................................................................................1-12SYSTEM OPERATION1. Using the ARINC 781 Avionics System............................................................... 2-1A. Operating the MCDU ....................................................................................................... 2-1(1) Output Ports .................................................................................................................2-1
SYSTEM DESCRIPTION, INSTALLATION, AND MAINTENANCE MANUALARINC 781 SDU, SCM, and FMPA23-15-30 TC-216 APR 10(2) Input Ports.................................................................................................................... 2-1(3) Screen.......................................................................................................................... 2-1(4) Keyboard...................................................................................................................... 2-2(5) Special Symbols........................................................................................................... 2-2(6) Navigating the MCDU .................................................................................................. 2-3B. Logging On and Off ..........................................................................................................2-4(1) Logging On Automatically ............................................................................................ 2-4(2) Logging On Manually ................................................................................................... 2-5(3) Logging Off................................................................................................................... 2-5(4) Viewing Log Status....................................................................................................... 2-5C. Making Cockpit Calls ....................................................................................................... 2-6(1) Making Calls from the Telephone Directory ................................................................. 2-6(2) Ending Calls................................................................................................................. 2-8D. Viewing BITE Information ................................................................................................ 2-8INSTALLATION1. Advisories .............................................................................................................. 3-12. Pre-Installation Inspection ................................................................................... 3-1A. Unpacking and Inspecting Equipment ............................................................................. 3-1B. Cabling Notes .................................................................................................................. 3-13. Installation Procedure........................................................................................... 3-24. Connection Details................................................................................................ 3-2A. SDU ................................................................................................................................. 3-2B. SCM ................................................................................................................................. 3-4C. FMPA ............................................................................................................................... 3-45. Installation and Engineering Drawings ............................................................... 3-6A. Outline and Installation Drawings .................................................................................... 3-6B. System Interconnect Drawings ........................................................................................ 3-6TEST AND FAULT ISOLATION1. Operational and Diagnostic Testing.................................................................... 4-1A. General ............................................................................................................................ 4-1B. Test and Fault Isolation Equipment Requirements .......................................................... 4-1C. SDU MPU ........................................................................................................................ 4-2(1) Connecting to the MPU................................................................................................ 4-2(2) Using the SDU MPU .................................................................................................... 4-3
SYSTEM DESCRIPTION, INSTALLATION, AND MAINTENANCE MANUALARINC 781 SDU, SCM, and FMPA23-15-30 TC-316 APR 10(3) Menu Item Descriptions ............................................................................................... 4-4D. Operational and Diagnostic Test Procedures .................................................................. 4-6(1) Test Setup Procedure................................................................................................... 4-7(2) Post Test ...................................................................................................................... 4-7(3) Installation and Operational Verification Tests ............................................................. 4-72. Troubleshooting and Fault Isolation ................................................................... 4-8A. Subsystem Health ............................................................................................................4-8B. SATCOM System Bus .................................................................................................... 4-10C. Thermal Status ............................................................................................................... 4-11D. SCM Health ................................................................................................................... 4-12E. Subsystem Bus Status ................................................................................................... 4-14F. RF Path Status ............................................................................................................... 4-14G. USIM and Data Bus Status ............................................................................................ 4-15H. ORT ............................................................................................................................... 4-16(1) ORT Use and Storage................................................................................................ 4-16(2) Checking the ORT...................................................................................................... 4-17I. Contact Product Support ................................................................................................. 4-173. Adjustment/Alignment Procedures ................................................................... 4-184. Modification History............................................................................................ 4-18MAINTENANCE AND REPAIR1. Maintenance........................................................................................................... 5-12. Repair ..................................................................................................................... 5-13. Instructions for Continued Airworthiness .......................................................... 5-1A. Airworthiness Limitations ................................................................................................. 5-2B. Electrical and Mechanical Inspection and Check ............................................................. 5-2C. Instructions for Continued Airworthiness ......................................................................... 5-24. Visual Inspection and Check................................................................................ 5-3APPENDIX A: RETURN MATERIAL AUTHORIZATION .......................................................... A-11. Warranty Returns ................................................................................................. A-12. Non-Warranty Returns ......................................................................................... A-13. Repackaging Requirements ................................................................................ A-14. RMA Procedure .................................................................................................... A-1
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SYSTEM DESCRIPTION, INSTALLATION, AND MAINTENANCE MANUALARINC 781 SDU, SCM, and FMPA23-15-30 TC-516 APR 10LIST OF FIGURESFigure INTRO-1 Satellite Data Unit.....................................................................................INTRO-1Figure INTRO-2 SDU Configuration Module.......................................................................INTRO-2Figure INTRO-3 Flange Mounted Power Amplifier .............................................................INTRO-2Figure 1-1 Simplified Aeronautical Satellite Communications System ........................................ 1-2Figure 1-2 ARINC 781 Avionics System ...................................................................................... 1-3Figure 1-3 ARINC 781 Avionics System Block Diagram.............................................................. 1-8Figure 1-4 FMPA Block Diagram ............................................................................................... 1-10Figure 2-1 MCDU Screen ............................................................................................................2-2Figure 2-2 MCDU Menus .............................................................................................................2-3Figure 3-1 ARINC 781 SDU Outline and Installation Drawing, 1394-E-1100 Rev B00 (Sheet 1 of 2) ..................................................................................................... 3-7Figure 3-2 ARINC 781 SDU Outline and Installation Drawing, 1394-E-1100 Rev B00 (Sheet 2 of 2) ..................................................................................................... 3-9Figure 3-3 ARINC 781 FMPA Outline and Installation Drawing, 1394-E-1200 Rev D00 (Sheet 1 of 2)................................................................................................... 3-11Figure 3-4 ARINC 781 FMPA Outline and Installation Drawing, 1394-E-1200 Rev D00 (Sheet 2 of 2)................................................................................................... 3-13Figure 3-5 ARINC 781 SCM Outline and Installation Drawing, 1394-E-1300 Rev B00 (Sheet 1 of 2) ................................................................................................... 3-15Figure 3-6 ARINC 781 SCM Outline and Installation Drawing, 1394-E-1300 Rev B00 (Sheet 2 of 2) ................................................................................................... 3-17Figure 3-7 ARINC 781 System Interconnect Drawing, 1394-B-1001 Rev A00 (Sheet 1 of 3) ................................................................................................... 3-19Figure 3-8 ARINC 781 System Interconnect Drawing, 1394-B-1001 Rev A00 (Sheet 2 of 3) ................................................................................................... 3-21Figure 3-9 ARINC 781 System Interconnect Drawing, 1394-B-1001 Rev A00 (Sheet 3 of 3) ................................................................................................... 3-23Figure 4-1 Maintenance Cable.....................................................................................................4-2Figure 4-2 Menu 1 Screen Display .............................................................................................. 4-4Figure 4-3 Menu 2 Screen Display .............................................................................................. 4-5Figure 4-4 Menu 3 Screen Display .............................................................................................. 4-5Figure 4-5 SATCOM Subsystem Health Menu ............................................................................4-9Figure 4-6 SATCOM System Bus Menu .................................................................................... 4-10Figure 4-7 SATCOM Overtemp Menu ....................................................................................... 4-12Figure 4-8 SATCOM SCM Menu ...............................................................................................4-13Figure 4-9 SATCOM Subsystem Bus Menu ..............................................................................4-14
SYSTEM DESCRIPTION, INSTALLATION, AND MAINTENANCE MANUALARINC 781 SDU, SCM, and FMPA23-15-30 TC-616 APR 10Figure 4-10 SATCOM RF Path Menu, System with FMPA........................................................ 4-15Figure 4-11 SATCOM USIM/DATA Menu ................................................................................. 4-16
SYSTEM DESCRIPTION, INSTALLATION, AND MAINTENANCE MANUALARINC 781 SDU, SCM, and FMPA23-15-30 TC-716 APR 10LIST OF TABLES Table 1-1 SDU Physical Characteristics and Specifications ....................................................... 1-4 Table 1-2 SCM Physical Characteristics and Specifications ...................................................... 1-5 Table 1-3 External FMPA Physical Characteristics and Specifications ......................................1-6 Table 1-4 ARINC 781 System RTCA/DO-160E Environmental Characteristics ......................... 1-7 Table 1-5 SDU System Interfaces .............................................................................................. 1-9 Table 1-6 SDU LED Status .......................................................................................................1-11 Table 2-1 ARINC 781 System Log Status .................................................................................. 2-5 Table 3-1 SDU Rear Connector Pin Deviations..........................................................................3-3 Table 3-2 SDU Front Connector DSUB and RJ45 Pin Assignment............................................3-3 Table 3-3 SCM D-Type Connector Pin Assignment ................................................................... 3-4 Table 3-4 FMPA J1 Connector Pin Assignments........................................................................ 3-5 Table 4-1 List of Required Test Equipment ................................................................................ 4-2 Table 4-2 Maintenance Port Connection Settings ...................................................................... 4-3 Table 4-3 Menu 1 Item Descriptions ........................................................................................... 4-4 Table 4-4 Menu 2 Item Descriptions ........................................................................................... 4-5 Table 4-5 Menu 3 Item Descriptions ........................................................................................... 4-6 Table 4-6 Test Setup Procedure.................................................................................................4-7 Table 4-7 Post Test Procedure ................................................................................................... 4-7 Table 4-8 Power-On Test Procedure .......................................................................................... 4-8 Table 4-9 SATCOM Subsystem Health Menu ............................................................................ 4-9 Table 4-10 Bus Status Indicators..............................................................................................4-10 Table 4-11 SATCOM OVERTEMP Menu ................................................................................. 4-12 Table 4-12 SATCOM SCM Menu ............................................................................................. 4-13 Table 4-13 SATCOM SUBSY BUS Menu................................................................................. 4-14 Table 4-14 SATCOM RF PATH Menu ...................................................................................... 4-15 Table 4-15 SATCOM USIM/DATA Menu.................................................................................. 4-16
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SYSTEM DESCRIPTION, INSTALLATION, AND MAINTENANCE MANUALARINC 781 SDU, SCM, and FMPA23-15-30 INTRO-116 APR 10INTRODUCTIONThis manual provides the specifications, principles of operation, and information necessary to install the ARINC 781 SATCOM Avionics System, including the Satellite Data Unit (SDU), SDU Configuration Module (SCM), and Flange Mounted High Power Amplifier (FMPA).This document is divided into the following sections: • System Description • System Operation • Installation • Test and Fault Isolation • Maintenance and RepairNOTE: An Illustrated Parts List is not included with this manual.Only qualified avionics personnel who are knowledgeable in the technical and safety issues related to the installation of aircraft communications equipment should perform the installation procedures provided in this manual.This manual includes general installation guidelines only; it is not intended to provide specific procedures for every type of installation.If necessary, the information in this manual will be revised. Before attempting the installation procedures presented in this manual, verify that you have a complete and up-to-date release of this document.1. Illustration of EquipmentFigure INTRO-1 shows the SDU.Figure INTRO-1 Satellite Data Unit
SYSTEM DESCRIPTION, INSTALLATION, AND MAINTENANCE MANUALARINC 781 SDU, SCM, and FMPA23-15-30 INTRO-216 APR 10Figure INTRO-2 shows the SCM.Figure INTRO-2 SDU Configuration ModuleFigure INTRO-3 shows the FMPA.Figure INTRO-3 Flange Mounted Power Amplifier2. Acronyms and AbbreviationsAES Aircraft Earth StationAMSS Aeronautical Mobile Satellite Services
SYSTEM DESCRIPTION, INSTALLATION, AND MAINTENANCE MANUALARINC 781 SDU, SCM, and FMPA23-15-30 INTRO-316 APR 10AORE Atlantic Ocean Region-EastAORW Atlantic Ocean Region-WestAPAC Asia-PacificBIT Built-In-TestBITE Built-In-Test EquipmentBSU Beam Steering UnitCEPT-E1 Comite Europeen des Postes et TelecommunicationsCTU Cabin Telecommunications UnitDLNA Diplexer/Low-Noise AmplifierDITS Digital Information Transfer SystemEASA European Aviation Safety AgencyEMEA Europe, Middle East, and AfricaESD Electrostatic DischargeFAA Federal Aviation AdministrationFAR Federal Aviation RegulationFMPA Flange Mounted High Power AmplifierFMS Flight Management SystemGES Ground Earth StationGND GroundHGA High Gain AntennaHPA High Power AmplifierICA Instructions for Continued AirworthinessICAO lnternational Civil Aviation OrganizationI/O Input/OutputIOR Indian Ocean RegionIRS Inertial Reference SystemISDN Integrated Services Digital NetworkLES Land Earth StationLRU Line Replaceable UnitMCDU Multi-purpose Control Display UnitMCU Modular Concept Unit
SYSTEM DESCRIPTION, INSTALLATION, AND MAINTENANCE MANUALARINC 781 SDU, SCM, and FMPA23-15-30 INTRO-416 APR 103. Safety AdvisoriesWarnings, cautions, and notes in this manual provide the reader with the following information: • A WARNING describes an operation, procedure, or condition that, if not obeyed, could cause injury or death. • A CAUTION describes an operation, procedure, or condition that, if not obeyed, could cause damage to the equipment. • A NOTE provides supplementary information or explanatory text that makes it easier to MES Mobile Earth StationMHz MegahertzMOPS Minimum Operational Performance StandardsMPU Maintenance Port UtilityORT Owner Requirement TablePOR Pacific Ocean RegionPOTS Plain Old Telephone SystemRF Radio FrequencyRMA Return Material AuthorizationRTN ReturnRx ReceiveSATCOM Satellite CommunicationsSBB SwiftBroadband (Inmarsat)SCM SDU Configuration ModuleSDU Satellite Data UnitSLU Software Logical UnitSTC Supplemental Type CertificateTx TransmitUSIM Universal Subscriber Identity ModuleUUT Unit Under TestVSWR Voltage Standing Wave Ratio
SYSTEM DESCRIPTION, INSTALLATION, AND MAINTENANCE MANUALARINC 781 SDU, SCM, and FMPA23-15-30 INTRO-516 APR 10understand and perform procedures.All personnel who install, operate, and maintain the ARINC 781 SDU, SCM, FMPA, and associated test equipment must know and obey the safety precautions listed below. The procedures provided in this manual assume that the person performing installation or maintenance tasks is familiar with and obeys standard aviation shop and safety practices.The general safety advisories include the following:WARNING: THE ARINC 781 AVIONICS SYSTEM INCLUDES COMPONENTS THAT RADIATE RF AND MICROWAVE EMISSIONS IN THE BANDWIDTH OF 1626.5 TO 1660.5 MHZ.WARNING: BEFORE HANDLING ANY UNIT OR COMPONENT, GROUND THE REPAIR OPERATOR THROUGH A CONDUCTIVE WRIST STRAP OR OTHER DEVICE THAT USES A 470 KILOHM OR 1 MEGAOHM SERIES RESISTOR TO PREVENT INJURY.CAUTION: TURN OFF POWER BEFORE DISCONNECTING ANY EQUIPMENT FROM WIRING. DISCONNECTING THE EQUIPMENT WITHOUT TURNING POWER OFF MAY CAUSE VOLTAGE TRANSIENTS THAT CAN DAMAGE THE EQUIPMENT.CAUTION: THIS EQUIPMENT INCLUDES ITEMS THAT ARE ELECTROSTATIC DISCHARGE SENSITIVE (ESDS) DEVICES. ESDS DEVICES ARE SUBJECT TO DAMAGE BY EXCESSIVE LEVELS OF VOLTAGE AND/OR CURRENT. THE LOW-ENERGY SOURCE THAT MOST COMMONLY DESTROYS ESDS DEVICES IS THE HUMAN BODY, WHICH, IN CONJUNCTION WITH NONCONDUCTIVE GARMENTS AND FLOOR COVERINGS, GENERATES AND RETAINS STATIC ELECTRICITY. TO ADEQUATELY PROTECT ESDS DEVICES, THE DEVICE AND EVERYTHING THAT CONTACTS IT MUST BE BROUGHT TO GROUND POTENTIAL BY PROVIDING A CONDUCTIVE SURFACE AND DISCHARGE PATHS. USE STANDARD INDUSTRY PRECAUTIONS TO KEEP RISK OF DAMAGE TO A MINIMUM WHEN TOUCHING, REMOVING, OR SERVICING THE EQUIPMENT.
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SYSTEM DESCRIPTION, INSTALLATION, AND MAINTENANCE MANUALARINC 781 SDU, SCM, and FMPA23-15-30 1-116 APR 10SYSTEM DESCRIPTIONThis section includes basic information about the ARINC 781 avionics system, including the following sections: • Inmarsat System Overview • Equipment Overview • Equipment Specifications • System Interfaces • User Interfaces • Software Description1. Inmarsat System OverviewThis section provides an overview of the Inmarsat satellite communications system and networks.Satellite communication systems provide users with long-range voice and data communication by accessing global satellite and ground communications networks. Satellite communication systems include global satellite networks, Land Earth Stations (LESs), Ground Earth Stations (GESs), Aircraft Earth Stations (AESs), and Mobile Earth Stations (MESs).The LES/GES is the part of the satellite communication system that is on the ground. These numerous, international stations are responsible for routing voice and data calls from the MES/AES to their destinations around the world. The MES/AES is the part of the satellite communication system that is on the aircraft. GES and AES are the terms associated with Aero-H+ services. LES and MES are terms associated with other satellite communication services.Inmarsat is an international organization that operates and maintains multiple geostationary satellites and satellite networks (I-3 and I-4). For more information about I-3 and I-4 satellite beam coverage, refer to the Inmarsat website—www.inmarsat.com.I-3 satellites provide Inmarsat services for aviation (Aero H+ and Swift 64), shipping, and land-mobile users. The satellites connect to ground telecommunication systems through a network of GESs. Each I-3 satellite is located over an Ocean Region (OR)—the current OR names are: • Atlantic Ocean Region-East (AOR-E) • Atlantic Ocean Region-West (AOR-W) • Indian Ocean Region (IOR) • Pacific Ocean Region (POR)
SYSTEM DESCRIPTION, INSTALLATION, AND MAINTENANCE MANUALARINC 781 SDU, SCM, and FMPA23-15-30 1-216 APR 10In addition to the services offered by I-3 satellites, the I-4 satellites provide worldwide SwiftBroadband (SBB service). Each I-4 satellite has 19 wide spot beams, 228 narrow spot beams, and is capable of accommodating many separate, simultaneous SBB sessions. The SBB service and I-4 satellites support broadband applications such as video conferencing. The current I-4 satellites are: • AMERICAS • EMEA (Europe, Middle East, and Africa) • APAC (Asia-Pacific)The satellite communication avionics (ARINC 781 systems), typically in conjunction with an antenna subsystem, act as an AES/MES. The combined system provides users with a data and voice communications link to the satellite network and global telecommunications system. Figure 1-1 illustrates a simplified satellite communications system.Figure 1-1 Simplified Aeronautical Satellite Communications System2. Equipment OverviewThe ARINC 781 SATCOM Avionics System, in combination with the antenna sub-system, provides Aeronautical Mobile Satellite Services (AMSS) by facilitating airborne satellite communications over the Inmarsat network, including the following services:
SYSTEM DESCRIPTION, INSTALLATION, AND MAINTENANCE MANUALARINC 781 SDU, SCM, and FMPA23-15-30 1-316 APR 10 • Classic Aero-H+—Provides packet data services at 600 bps, 1200 bps, or 10500 bps over the PRT channel combination and half-rate circuit switched voice or data service over the C channel. • Swift 64—Provides packet switched Mobile Packet Data Service (MPDS). • SwiftBroadband—Provides AMBE+2 voice (circuit-switched) and broadband packet switched services. The equipment can achieve aggregate rates of 432 kbps, but data rates may vary with network load.The ARINC 781 SATCOM Avionics System consists of the Satellite Data Unit (SDU), the Satellite Data Unit Configuration Module (SCM), and optionally, the Flange Mount Power Amplifier (FMPA). Figure 1-2 illustrates the ARINC 781 avionics system.Figure 1-2 ARINC 781 Avionics SystemA. SDUThe SDU is the central communications processing and control unit and largely determines the functionality of the complete SATCOM system. It manages interfaces, routing and priorities, and call channel establishment and tear down. When configured without an FMPA, the SDU provides RF power amplification using an internal high power amplifier (HPA).The SDU is divided into several Shop Replaceable Units (SRUs) that are electrically connected via the backplane. Various SRUs are also connected using RF cables. B. SCMThe SCM is an external peripheral of the SDU and provides a dedicated interface to the SDU. It stores Secure and User ORTs (Owner Requirement Tables) and a Swift 64 Forward ID. The SCM can accommodate up to four Universal Subscriber Identity Modules (USIM) that store subscriber information for the SBB network.
SYSTEM DESCRIPTION, INSTALLATION, AND MAINTENANCE MANUALARINC 781 SDU, SCM, and FMPA23-15-30 1-416 APR 10By storing configuration information independent of the SDU, the SCM facilitates efficient SDU replacement. A new SDU that replaces a faulty SDU does not require any configuration. All configuration information is obtained from the SCM.C. FMPAThe FMPA is an optional component that provides amplification for configurations requiring an external HPA. It is managed by the SDU and provides the final radio frequency amplification in the AES system. The FMPA is divided into three SRUs—power supply, control processor, and power amplifier. An overall packaging system encloses the SRUs and the physical connections between them.3. Equipment SpecificationsThis section includes the physical and environmental characteristics of the ARINC 781 SDU, SCM, and FMPA.Table 1-1 provides a summary of the physical characteristics and equipment specifications of the SDU component. Table 1-1 SDU Physical Characteristics and Specifications CHARACTERISTIC SPECIFICATIONRELATED DOCUMENTSARINC characteristics ARINC 781 Mark 3 Aviation Satellite Communications SystemARINC 600 Air Transport Avionics Equipment InterfacesRTCA documents DO-254, Design Assurance Guidance for Airborne Electronic HardwareDO-178B, Software Considerations in Airborne Systems and Equipment CertificationDO-160E, Environmental Conditions and Test Procedures for Airborne EquipmentDO-210, Minimum Operational Performance Standards (MOPS) for Geosynchronous Orbit Aeronautical Mobile Satellite Services (AMSS) AvionicsSDU SPECIFICATIONSPhysical SizeLength 37.24 cm (14.66 in)Width 19.35 cm (7.62 in)Height 19.93 cm (7.85 in)Weight 11.35 kg (25.0 lbs)
SYSTEM DESCRIPTION, INSTALLATION, AND MAINTENANCE MANUALARINC 781 SDU, SCM, and FMPA23-15-30 1-516 APR 10Table 1-2 provides a summary of the physical characteristics and equipment specifications of the SCM component.Heating and CoolingCooling Air ARINC 600Flow Rate 50 kg/hr 40°C (max) airPressure Drop 5 ± 3 mm H2OMounting Information 6 MCU tray as per ARINC 600Electrical InterfacesPower/Control interface as per ARINC 781Power RequirementsInput Voltage (AC) 96 to 122 V AC, 300 to 900 HzInput Voltage (DC) 18 to 32.3 V DCPower Consumption 300 VA if operated with an external FMPA 400 VA if operated as standalone Table 1-1 SDU Physical Characteristics and Specifications (Continued)CHARACTERISTIC SPECIFICATION Table 1-2 SCM Physical Characteristics and Specifications CHARACTERISTIC SPECIFICATIONRELATED DOCUMENTSARINC characteristics ARINC 781 Mark 3 Aviation Satellite Communications SystemRTCA documents DO-254, Design Assurance Guidance for Airborne Electronic HardwareDO-160E, Environmental Conditions and Test Procedures for Airborne EquipmentSCM SPECIFICATIONSPhysical SizeLength 11.43 cm (4.5 in)Width 10.16 cm (4.0 in)Height 2.54 cm (1.0 in)Weight 0.454 kg (1.0 lbs)
SYSTEM DESCRIPTION, INSTALLATION, AND MAINTENANCE MANUALARINC 781 SDU, SCM, and FMPA23-15-30 1-616 APR 10Table 1-3 provides a summary of the physical characteristics and equipment specifications of the external FMPA component. Table 1-3 External FMPA Physical Characteristics and Specifications CHARACTERISTIC SPECIFICATIONRELATED DOCUMENTSARINC characteristics ARINC 781 Mark 3 Aviation Satellite Communications SystemRTCA documents DO-178B, Software Considerations in Airborne Systems and Equipment CertificationDO-160E, Environmental Conditions and Test Procedures for Airborne EquipmentFMPA SPECIFICATIONSPhysical SizeLength 32.46 cm (12.78 in)Width 18.34 cm (7.22 in)Height 13.72 cm (5.40 in)Weight 6.81 kg (15.0 lbs)Mounting Information 4 x 0.266” holes on 11.19” x 6.4” spacingElectrical InterfacesPower/Control interfaceARINC 781Power Requirements 115 Vrms ac, 300 Hz to 900 HzPower Consumption < 250 VATable 1-4 lists the RTCA/DO-160E environmental characteristics of the SDU, SCM, and FMPA.Mounting Information 4 x 0.125" holes on 3.3" x 3.5" spacing, per attachment 1-6 of ARINC 781Electrical InterfacesPower/Control interface as per ARINC 781Power Requirements + 12 V ± 5% (derived from SDU) Table 1-2 SCM Physical Characteristics and Specifications (Continued)CHARACTERISTIC SPECIFICATION
Table 1-4 ARINC 781 System RTCA/DO-160E Environmental Characteristics Section Environmental Condition CategorySDU/SCM FMPA4.0 Temperature and Altitude F2/A2 F2/A24.5.1 Ground Survival Low F2 F24.5.1 Short Term Operating Low Ambient F2 F24.5.2 Operating Low Ambient F2 F24.5.3 Ground Survival High F2 F24.5.3 Short Time Operating High F2 F24.5.4 Operating High Ambient F2 F24.5.5 In Flight Loss of Cooling PF24.6.1 Altitude F2 F24.6.2 Decompression A2 A24.6.3 Overpressure A2 (modified to -20,000 ft)A2 (modified to -20,000 ft)5Temperature Variation B B6Humidity A A7Operational Shock and Crash Safety B B8.5 Vibration Standard – Sine S, Curves L, M, Y S, Curves L, M, Y8.5.2 Vibration Standard – Random S, Curve B S, Curve C8.7.2 Vibration Robust – Random R, Curves B, B1 R, Curves C, C19.0 Explosive Atmosphere E E15 Magnetic Effect Z Z16.5 Power Input (ac) A(WF)H A(WF) (modified extended frequency 300 Hz to 900 Hz)17 Voltage Spike A A18 Audio Frequency Conducted Susceptibility (ac) K(WF) K(WF)19 Induced Signal Susceptibility CW CW20 Radio Frequency Susceptibility R R21 Emission of RF Energy M M22 Lightning Induced Transient Susceptibility A3J33 A3J3325 Electrostatic Discharge (ESD) A ASYSTEM DESCRIPTION, INSTALLATION, AND MAINTENANCE MANUALARINC 781 SDU, SCM, and FMPA23-15-30 1-716 APR 104. System InterfacesThis section describes the ARINC 781 system interfaces.Figure 1-3 illustrates the block diagram of the ARINC 781 avionics system.
SYSTEM DESCRIPTION, INSTALLATION, AND MAINTENANCE MANUALARINC 781 SDU, SCM, and FMPA23-15-30 1-816 APR 10Figure 1-3 ARINC 781 Avionics System Block DiagramA. SDUThe SDU is divided into the following SRUs: • Channel Cards (2) • Control and Data Processor Card • Voice and Router Processor Card • Power Amplifier • ARINC Backplane • DIN Backplane • 10 MHz Oven Controlled Crystal Oscillator • Power SupplyThe major interfaces of the SDU are listed in Tab l e 1-5.
SYSTEM DESCRIPTION, INSTALLATION, AND MAINTENANCE MANUALARINC 781 SDU, SCM, and FMPA23-15-30 1-916 APR 10B. SCMThe SCM does not provide any interfaces other than a dedicated interface to the SDU. The SCM is powered by the SDU.C. FMPAThe FMPA provides RF multi-carrier amplification capabilities permitting up to 32 W total average RF power. The SDU manages the FMPA, providing the necessary command control. The FMPA has four operational interfaces: • ARINC 429 Control (x1)/BITE (x1) – FMPA to SDU control and reporting • RF Input Signal (x1) – RF low power input from the SDU • RF Output Signal (x1) – RF high power output to the antenna subsystem (DLNA) • Power Supply (x1) – 115 Vac, 300 Hz to 900 HzFigure 1-4 illustrates a block diagram of the FMPA. Table 1-5 SDU System Interfaces System Interface DescriptionACU/BSU (x1) Antenna Control Unit/Beam Steering UnitFMPA (x1) Flange Mount Power AmplifierMCDU (x3) Multi-Purpose Control and Display UnitACARS CMU (x2) Aircraft Communication Addressing and Reporting System Communication Management UnitIRS (x2)/GPS (x1) Inertial Reference System/Global Positioning SystemSCM (x1) SDU Configuration ModuleCMC (x1) Central Maintenance ComputerAES ID (x1) Aircraft Earth Station IdentificationServicing Front Panel Accessible Service Port for data log retrievalButton Initiated Self-TestRF Transmit to the FMPA, Receive from the DLNAAntenna subsystem ARINC 781 Antenna SubsystemMiscellaneous ARINC discrete input, outputs, and configuration straps
SYSTEM DESCRIPTION, INSTALLATION, AND MAINTENANCE MANUALARINC 781 SDU, SCM, and FMPA23-15-30 1-1016 APR 10Figure 1-4 FMPA Block Diagram5. User InterfacesThis section describes the ARINC 781 SDU interfaces that enable users to access Inmarsat services and monitor the operation of the ARINC 781 avionics system.NOTE: There are no user interface associated with the SCM and FMPA.A. MCDUThe MCDU is a device that uses an ARINC 429 interface per ARINC 739, which lets you communicate with individual instruments on an aircraft, including the Flight Management System (FMS), very high frequency (VHF) radio, and the SDU.The SDU supports three MCDUs.B. 4-Wire AudioThe SDU supports two 4-wire audio interfaces.C. EthernetThe SDU supports five Ethernet data interfaces.D. POTSThe SDU supports two POTS interfaces.
SYSTEM DESCRIPTION, INSTALLATION, AND MAINTENANCE MANUALARINC 781 SDU, SCM, and FMPA23-15-30 1-1116 APR 10E. CEPT-E1The SDU supports one CEPT-E1 interface.F. ISDNTwo ISDN interfaces are currently not supported.G. Maintenance PortThe SDU is equipped with a maintenance port, located on its front panel. The maintenance port provides the physical connection to a password-protected Maintenance Port Utility (MPU) that provides a system interface for users or service personnel who need to monitor or troubleshoot the system.For more information on configuring the maintenance port, refer to "Connecting to the MPU" on page 4-2.H. LEDsThe front panel of the SDU has two LEDs to indicate unit status: • One green LED labelled Power • One red LED labelled FaultTable 1-6 provides information about the LED signals. Table 1-6 SDU LED Status Power LED Status Fault LED Status Description of SDU StatusOn for 60 seconds, then off during normal operationOff No fault detectedOff On while the fault exists LRU fault detectedOff Flashing at 1 Hz with a 50% duty cycle while the fault existsSystem fault detected but not isolated to the LRUAlternating flashing of Power and Fault LEDs Self-test in progressI. Self-Test ButtonThe front panel of the SDU has a recessed button labelled Test: • To reset the unit, press and hold the Test button for at least 5 seconds • To initiate self-test (when no LEDs are flashing), momentarily press the Test button • To disable the existing LED condition (when LEDs are flashing), momentarily press the Test buttonNOTE: During initial power-up or self-test execution, a momentary press of the self-test button is ignored.The LEDs indicate the results of the self-test. Ta b l e 1-6 provides information about the meaning of LED signals.
SYSTEM DESCRIPTION, INSTALLATION, AND MAINTENANCE MANUALARINC 781 SDU, SCM, and FMPA23-15-30 1-1216 APR 106. Software DescriptionAll operating software meets RTCA/DO-178B Level D requirements.The SCM does not contain any software. Only configurable parameters are stored in the SCM.All FMPA software is stored in the Control Processor SRU. It manages BITE, data loading, maintenance, and ARINC 429 label transmission and reception. The SDU software is not partitioned. The software is modular and modules run on individual Software Logical Units (SLUs) within the SDU: • Each channel card has a single SLU • Control and Data Processor card has a Control SLU and a Data SLU • Voice and Router card has a Voice SLU and a Router SLU
SYSTEM DESCRIPTION, INSTALLATION, AND MAINTENANCE MANUALARINC 781 SDU, SCM, and FMPA23-15-30 2-116 APR 10SYSTEM OPERATIONThe SDU is an integral component in an AES. Together with the SCM, DLNA, Antenna, and HGA subsystem, it provides AMSS by facilitating airborne satellite communication services over the Inmarsat network. These services comprise Classic Aero-H+, Swift 64, and SwiftBroadband (SBB).The SCM is a dedicated peripheral of the SDU and stores aircraft specific installation configuration critical to the operation of the AES.The FMPA provides RF multi-carrier amplification capabilities permitting up to 32 W total average RF power. The SDU manages the FMPA, providing the necessary command control. This section provides basic information on using the ARINC 781 avionics system.1. Using the ARINC 781 Avionics SystemThis section describes how to perform the following tasks: • Operating the MCDU • Logging On and Off • Making Cockpit Calls • Viewing BITE InformationA. Operating the MCDUThis section provides information about the MCDU and its interfaces—output and input ports, the screen, and the keyboard.(1) Output PortsThe MCDU transfers its identification and commands to the SDU using 32 bit words on a 12-14.5 kbps output port, as defined in ARINC Specification 429, Digital Information Transfer System (DITS).(2) Input PortsThe MCDU receives identification information and displays data from individual subsystems using seven input ports, as defined by ARINC Specification 429. Ports 1 and 2 are reserved for FMSs, and they operate at 100 kbps. Ports 3–7 are available for the MCDU to communicate with the SDU, and they operate at 12-14.5 kbps.(3) ScreenThe MCDU displays all data on the screen, as shown in Figure 2-1.
SYSTEM DESCRIPTION, INSTALLATION, AND MAINTENANCE MANUALARINC 781 SDU, SCM, and FMPA23-15-30 2-216 APR 10Figure 2-1 MCDU ScreenThe top of the screen displays the title of the menu on the screen. The bottom of the screen (Line 14) is the scratchpad that displays information that you enter on the keyboard.The MCDU has six buttons on each side of the screen that activate MCDU functions. Figure 2-1 displays these buttons on the left and right sides of the screen. When the functions corresponding to a button are available, the function is displayed beside the button.Other lines on the MCDU screen display information relevant to the function or status of the ARINC 781 system. (4) KeyboardThe MCDU’s keyboard includes a set of numeric keys and a set of alphabetic keys, both of which you can use to enter data into the MCDU.The keyboard may include preset keys, such as the following: • The IDX or MAIN MENU key: this key returns you to the MCDU’s main menu. • The CLR key: this key clears any text you type into the scratchpad. • The NEXT PAGE key: this key brings up the next page of a menu if one is available. • The PREV PAGE key: this key brings up the previous page of a menu if one is available.(5) Special SymbolsBecause of space constraints on the screen, the MCDU uses a number of special symbols to indicate actions: • < and > appear at the far left or right to indicate that another menu page is available in that direction or that a function is available for that label.
SYSTEM DESCRIPTION, INSTALLATION, AND MAINTENANCE MANUALARINC 781 SDU, SCM, and FMPA23-15-30 2-316 APR 10 • NUMBER/NUMBER appears to tell you which page out of how many pages you are viewing. For example, 1/3 would appear when you are on page 1 of 3 pages in total.(6) Navigating the MCDUThe MCDU includes a number of menus, as shown in Figure 2-2. Figure 2-2 MCDU Menus
SYSTEM DESCRIPTION, INSTALLATION, AND MAINTENANCE MANUALARINC 781 SDU, SCM, and FMPA23-15-30 2-416 APR 10B. Logging On and OffUsing the MCDU, you can log on to the satellite network manually or automatically: • Manual Logon—constrains the logon to use a satellite that you select • Automatic Logon—logs on using the best available satellite as defined by the ORTIf specified in the ORT, the initial system logon happens immediately after the ARINC 781 system powers up, with no MCDU input required. If the ORT is not configured as such, you must initiate the logon from the MCDU (MANUAL LOG-ON or AUTO LOG-ON command).You can watch the progress of the logon on the SATCOM LOG 1/2 page, or simply wait until the prompt on the SAT-PHONE 1/2 page indicates the service is available for use.(1) Logging On AutomaticallyWhen you initiate an automatic logon, the system selects a satellite and GES based on the preferences specified in the ORT.To log on automatically: 1. On the SAT-PHONE 1/2 page, press the key next to LOG.The SATCOM LOG page appears. 2. On the SATCOM LOG page, press the key next to AUTO LOG-ON.The MCDU returns to the SAT-PHONE 1/2 page and the SAT-L and SAT-R channels are updated with READY status after the logon completes.NOTE: The MCDU does not display the AUTO LOG-ON and MANUAL LOG-ON functions when the ARINC 781 system is already logged on.NOTE: On the SAT-PHONE 1/2 page, SAT-L shows the Classic Aero channel status and SAT-R shows the SBB channel status. The ARINC 781 system logs on the Classic Aero channels first, and then logs on the SBB channels.
SYSTEM DESCRIPTION, INSTALLATION, AND MAINTENANCE MANUALARINC 781 SDU, SCM, and FMPA23-15-30 2-516 APR 10(2) Logging On ManuallyTo log on manually, you must select a satellite and GES.To log on manually: 1. On the SAT-PHONE 1/2 page, press the key next to LOG.The SATCOM LOG page appears. 2. Press the key next to SATELLITE ID until the MCDU screen shows the satellite ID to which you want the ARINC 781 system to log on. 3. Press the key next to GES ID until the MCDU screen shows the GES to which you want the ARINC 781 system to log on. 4. On the SATCOM LOG page, press the key next to MANUAL LOG-ON.The MCDU returns to the SAT-PHONE 1/2 page and updates the SAT-L and SAT-R channels with READY status after the log on completes.NOTE: SAT-L shows the Classic Aero channel status and SAT-R shows the SBB channel status. The ARINC 781 system logs on the Classic Aero channels first, and then searches for SBB or Swift 64 services on the satellite determined by the Classic Aero log-on. (3) Logging OffTo log off: 1. On the SAT-PHONE 1/2 page, press the key next to LOG.The SATCOM LOG page appears. 2. On the SATCOM LOG page, press the key next to LOG-OFF.The ARINC 781 system logs off the satellite network.(4) Viewing Log StatusThe log status defines whether the ARINC 781 system is logged on or logged off. Valid values are shown in Ta b l e 2-1. Table 2-1 ARINC 781 System Log Status Log Status DescriptionCALIBRATION If in FMPA mode, and cable calibration not yet completedSAFE MODE Configuration error detectedHSR NOT READY High stability oscillator is in a warming conditionANT NOT READY Antenna is reporting test stateAES ID NOT READY Displayed until a non-zero ICAO address is presentNAV DATA UNAVAIL Insufficient navigation data availableCC NOT READY Channel card has not fully bootedLOGGED OFF ARINC 781 system not logged on to the satellite network. Awaiting input from the userTUNING TO SAT Tuning and scanning for reception from the selected satellite
SYSTEM DESCRIPTION, INSTALLATION, AND MAINTENANCE MANUALARINC 781 SDU, SCM, and FMPA23-15-30 2-616 APR 10To view log status: 1. On the SAT-PHONE 1/2 page, press the key next to LOG.The SATCOM LOG page appears. 2. The log status appears on the line below STATUS. C. Making Cockpit CallsYou can make air-to-ground and air-to-air calls using the ARINC 781 system, the MCDU, and one or two 4-wire headsets. You can manually dial calls or dial previously saved telephone numbers from the MCDU’s telephone directory.(1) Making Calls from the Telephone DirectoryYou can make voice calls from the numbers you have saved in the MCDU’s telephone directory. Numbers can be saved in the telephone directory using the MCDU or the ORT.To make a call from the telephone directory: 1. On the SAT-PHONE 1/2 page, press the key next to DIRECTORY.The SAT DIRECTORY INDEX page appears.DET SYS TABLE Updating the Satellite tableSPOT BEAM SEARCH Selecting the optimal spot beamWAIT LOGON CONF Awaiting the logon confirmation from the satelliteWAIT LOGON ACK Awaiting for logon acknowledge from the GESLOGGED ON Successfully logged on to GESREJECT-TEMPORARY Logon rejected by the GES, but the condition is temporaryREJECT-PERMANENT Logon rejected by the GES, and the condition is permanentREJECT-INV PARAM Logon rejected by the GES due to invalid parameters, and the condition is permanentREJECT-AES INVAL ICAO address was not accepted by the GES, the condition is permanentLOGGING OFF Starting the logoff process Table 2-1 ARINC 781 System Log Status (Continued)Log Status Description
SYSTEM DESCRIPTION, INSTALLATION, AND MAINTENANCE MANUALARINC 781 SDU, SCM, and FMPA23-15-30 2-716 APR 10 2. To access phone numbers in a directory, press the key next to a directory name. The SAT DIRECTORY page appears.NOTE: If an entry has the < symbol in the SAT-L column, that entry can be dialed on Classic Aero channels. If an entry has the > symbol in the SAT-R column, that entry can be dialed on SBB channels. If there is no symbol, the entry cannot be dialed on that channel. For example, in the SAT DIRECTORY shown below, NANDI CTR cannot be dialed on the SBB channel because it’s priority is higher than PUB (public). 3. Press the key to the left or right of the number you wish to dial. Pressing the left key loads the number on SAT-L and pressing the right key loads the number on SAT-R.The MCDU returns to the SAT-PHONE 1/2 page and the number is displayed under the selected channel (SAT-L or SAT-R).
SYSTEM DESCRIPTION, INSTALLATION, AND MAINTENANCE MANUALARINC 781 SDU, SCM, and FMPA23-15-30 2-816 APR 10 4. Optionally, to change the priority of the call, press the key next to PRI. Valid values are PUB (public), LOW (low), HGH (high), and EMG (emergency).NOTE: You cannot change the priority of calls on SAT-R (SBB) channels. SBB calls are always public priority. 5. Press the key next to MAKE CALL.The call status is shown on the SAT-PHONE 1/2 page.(2) Ending CallsTo end a call: • On the SAT-PHONE 1/2 page, press the key next to END CALL.When a call is ended, the MCDU briefly shows the status of why the call ended. To clear the status, press the key next to CLR STATUS.D. Viewing BITE InformationFrom the SATCOM BITE menu, you can view BITE information to determine subsystem health.To view BITE information: 1. On the MCDU main menu, press the key next to SAT-PHONE. 2. On the MCDU keyboard, press the NEXT PAGE key to advance to the second page of the SAT-PHONE menu, and then press the key next to SATCOM BITE.The SATCOM BITE page appears.You can view the following information from this screen: • SDU status on the line below SDU • Overall health of all subsystem components (SCM, DLNA, HGA, and FMPA) on the line below SUBSY HLTH • Thermal status of the SDU, HGA, and FMPA on the line below OVERTEMP
SYSTEM DESCRIPTION, INSTALLATION, AND MAINTENANCE MANUALARINC 781 SDU, SCM, and FMPA23-15-30 2-916 APR 10 • SCM health on the line below SCM • Peripheral LRU bus status on the line below SYS BUS • Subsystem bus status on the line below SUBSY BUS • The number of functional channels followed by the number of installed channels on the line below CHANNELS • RF path status on the line below RF PATH • USIM and data bus status on the line below USIM/DATANOTE: Valid values for status are OK and FAIL. If the status of a subsystem is FAIL, press the key next to the subsystem to view the details.To view more information about the health of a particular subsystem, press the key next to the name of the subsystem. For more information about the various MCDU menu screens, see "Troubleshooting and Fault Isolation" on page 4-8.
SYSTEM DESCRIPTION, INSTALLATION, AND MAINTENANCE MANUALARINC 781 SDU, SCM, and FMPA23-15-30 2-1016 APR 10Blank Page
SYSTEM DESCRIPTION, INSTALLATION, AND MAINTENANCE MANUALARINC 781 SDU, SCM, and FMPA23-15-30 3-116 APR 10INSTALLATIONThis section describes the procedures required to install the ARINC 781 system (SDU, SCM, and optionally, FMPA) on an aircraft, including the following sections: • Advisories • Pre-Installation Inspection • Installation Procedure • Connection Details • Installation and Engineering Drawings1. AdvisoriesBefore performing any installation procedures, read the safety advisories listed in the Introduction on page INTRO–4 of this manual.2. Pre-Installation InspectionBefore installing any ARINC 781 system, conduct a pre-installation inspection of all parts to make sure that no damage occurred during shipping.A. Unpacking and Inspecting Equipment • Unpack the ARINC 781 equipment from the shipping containers. • Verify that the part number displayed on the shipping box and equipment component matches the model and part number ordered. If components are missing from the shipment, contact the supplier immediately and report the problem. • Visually inspect the ARINC 781 equipment for any shipping damage. If any shipping damage has occurred, contact the shipping carrier immediately and report the problem. • Check the ARINC 781 equipment connectors for corrosion and damage. If damage is noted, do not apply power to the equipment. Contact the supplier immediately to report the problem.B. Cabling NotesBefore proceeding with the installation of the ARINC 781 system, read all cabling notes provided on the Interconnection and Contact Assignment drawings on page 3–19.
SYSTEM DESCRIPTION, INSTALLATION, AND MAINTENANCE MANUALARINC 781 SDU, SCM, and FMPA23-15-30 3-216 APR 103. Installation ProcedureOnly authorized technical personnel, trained in general aviation workmanship, that have a basic understanding of SATCOM systems should proceed with the following procedure. Before performing any installation procedures, read the safety advisories listed in “Advisories” on page 8 of this manual. 1. Install the SDU in a 6 MCU tray as per ARINC 600. The minimum clearance between the SDU and any other equipment installed above it shall be no less than 0.5 inches. 2. Install the SCM in any orientation. Refer to Table 1-2 on page 1-5 for the SCM mounting specification. • There are no clearance requirements for the SCM. • The SCM must be thermally insulated from the structure on which the SCM is mounted. The SCM includes heaters to maintain the SIM cards at an appropriate temperature. A large structure can act as a heat sink and reduce the effectivity of the SCM heaters. 3. If using an external FMPA, install the FMPA in any orientation. Refer to Table 1-3 on page 1-6 for the FMPA mounting specification. Refer to Figure 3-3 on page 3–11 for required clearances. 4. Connect the SCM to the SDU. The SDU supports one RS-422 interface for interconnect to the SCM. 5. Connect the SDU to the antenna subsystem. The SDU supports ARINC 429 communication to and from the antenna subsystem. 6. Connect the SDU to the MCDU(s). The SDU supports three ARINC 429 receive interfaces and one ARINC 429 transmit interface for interconnect to the flight deck MCDU(s). 7. If using an external FMPA, connect the SDU to the FMPA. The SDU supports one ARINC 429 interface for communication to and from the FMPA.4. Connection DetailsA. SDUThe SDU uses two external interface connectors: • Rear Connector—a low insertion force, size 2 shell receptacle accommodating coaxial and signal interconnections in the top plug insert, Quadrax and signal connections in the middle plug insert, and coaxial and power interconnections in the bottom plug insert. Pin assignments are compliant with ARINC Characteristic 781 with top plug and middle plug deviations as shown in Tab l e 3-1. • Front Connector—an RJ45 and 9S DSUB connector providing 10BT Ethernet interfaces and an RS-232 maintenance interface. Pin assignments are shown in Table 3-2. The front connector is behind a maintenance cover. This connector provides access to maintenance and troubleshooting information when the SDU is not in normal operation.
Table 3-1 SDU Rear Connector Pin Deviations Description Pin DeviationTop Plug Insert Pin DeviationsRouter Processor Maintenance TXD TP01A ATE pin 1Router Processor Maintenance RXD TP01B ATE pin 2Router Processor & Data I/O Processor Maintenance GNDTP01C ATE pin 3Data I/O Processor Maintenance TXD TP01D ATE pin 4Data I/O Processor Maintenance RXD TP01E ATE pin 5CC1 Processors #1 & #2 Maintenance GNDTP01F ATE pin 6CC1 Processor #1 Maintenance TXD TP01G ATE pin 7CC1 Processor #1 Maintenance RXD TP01H ATE pin 8CC1 Processor #2 Maintenance TXD TP01J ATE pin 9CC1 Processor #2 Maintenance RXD TP01K ATE pin 10Download Security TP02A ATE pin 11Voice Processor Maintenance GND TP02C ATE pin 13Voice Processor Maintenance TXD TP02D ATE pin 14Voice Processor Maintenance RXD TP02E ATE pin 15CC2 Processors #1 & #2 Maintenance GNDTP02F ATE pin 16CC2 Processor #1 Maintenance TXD TP02G ATE pin 17CC2 Processor #1 Maintenance RXD TP02H ATE pin 18CC2 Processor #2 Maintenance TXD TP02J ATE pin 19CC2 Processor #2 Maintenance RXD TP02K ATE pin 20Middle Plug Insert Pin DeviationsGPS ARINC 429 Receiver MP06J/MP06K SpareData Loader Link Enable MP08E For Ethernet alsoSYSTEM DESCRIPTION, INSTALLATION, AND MAINTENANCE MANUALARINC 781 SDU, SCM, and FMPA23-15-30 3-316 APR 10 Table 3-2 SDU Front Connector DSUB and RJ45 Pin Assignment 9S DSUB Pin NumberDescription RJ45 Pin Number Description1NC 1RX+2TX 2RX-3RX 3TX+4NC 4NC5GND 5NC6NC 6TX-
SYSTEM DESCRIPTION, INSTALLATION, AND MAINTENANCE MANUALARINC 781 SDU, SCM, and FMPA23-15-30 3-416 APR 10B. SCMThe SCM uses a 15 pin D-type male connector and locking screws. Pin assignments are compliant with ARINC Characteristic 781 and shown in Table 3-3. Table 3-3 SCM D-Type Connector Pin Assignment Pin Number Description1Data to SDU A (RS422)2Data to SDU B (RS422)3Data from SDU A (RS422)4Data from SDU B (RS422)5Reserved - RS232 Gnd (used for shop loading)6Spare7Chassis Ground8Power Input +8 V to +15 V9Reserved - Enable RS232 (used for shop loading)10 Reserved - 0 V strap output (used for shop loading)11 Spare12 Reserved - RS232 Tx (used for shop loading)13 Reserved - RS232 Rx (used for shop loading)14 Spare15 Power Return 0 VC. FMPAThe FMPA provides three external connectors: • J1 – Power/Control MIL-C-38999 Series III Insert Arrangement 17-26 • J2 – RF input, TNC female • J3 – RF output, N Type female 7NC 7NC8NC 8NC9NC Table 3-2 SDU Front Connector DSUB and RJ45 Pin Assignment (Continued)9S DSUB Pin NumberDescription RJ45 Pin Number Description
SYSTEM DESCRIPTION, INSTALLATION, AND MAINTENANCE MANUALARINC 781 SDU, SCM, and FMPA23-15-30 3-516 APR 10These connectors and their pin layouts are compliant with ARINC Characteristic 781. Table 3-4 describes the FMPA connector pin layout. Table 3-4 FMPA J1 Connector Pin Assignments Pin Number Signal DescriptionAHPA BITE A ARINC 429 from HPABHPA BITE B ARINC 429 from HPACRS422 RXD A Serial data to HPA +DRS422 RXD B Serial data to HPA -ERS422 TXD A Serial data from HPA +FRS422 TXD B Serial data from HPA -GSPARE SPAREHSPARE SPAREJChassis Ground Chassis GroundKSPARE SPARELSPARE SPAREMDiscrete BITE #1 Discrete BITE #1 from HPANDiscrete BITE #2 Discrete BITE #2 from HPAPAntenna Control A ARINC 429 to HPARAntenna Control B ARINC 429 to HPASAntenna Control Shield Shield for ARINC 429THPA BITE Shield Shield for ARINC 429URS422 Shield RS422 ShieldVSPARE SPAREWSPARE SPAREX115VAC Hot Aircraft AC powerY115VAC Return Aircraft AC powerZSPARE SPAREaDiscrete BITE #3 Discrete BITE #3 from HPAbATE Pin Manufacturer specificcSPARE SPARE
SYSTEM DESCRIPTION, INSTALLATION, AND MAINTENANCE MANUALARINC 781 SDU, SCM, and FMPA23-15-30 3-616 APR 105. Installation and Engineering DrawingsThis section contains the Outline and Installation diagrams, and Interconnection and Contact Assignment drawings for the SDU, SCM, and FMPA. All foldout pages are odd-numbered and not-backed for print production purposes.A. Outline and Installation DrawingsThe Outline and Installation drawings on pages 3–7 to 3–17 show the physical characteristics of the SDU, SCM, and FMPA, and provide installation data for the system.B. System Interconnect DrawingsSystem Interconnect drawings on pages 3–19 to 3–23 show the interconnection details for the SDU, SCM, and FMPA.
SYSTEM DESCRIPTION, INSTALLATION, AND MAINTENANCE MANUALARINC 781 SDU, SCM, and FMPA23-15-30 3-716 APR 10Figure 3-1 ARINC 781 SDU Outline and Installation Drawing, 1394-E-1100 Rev B00 (Sheet 1 of 2)
Blank PageSYSTEM DESCRIPTION, INSTALLATION, AND MAINTENANCE MANUALARINC 781 SDU, SCM, and FMPA23-15-30 3-816 APR 10
SYSTEM DESCRIPTION, INSTALLATION, AND MAINTENANCE MANUALARINC 781 SDU, SCM, and FMPA23-15-30 3-916 APR 10Figure 3-2 ARINC 781 SDU Outline and Installation Drawing, 1394-E-1100 Rev B00 (Sheet 2 of 2)
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SYSTEM DESCRIPTION, INSTALLATION, AND MAINTENANCE MANUALARINC 781 SDU, SCM, and FMPA23-15-30 3-1116 APR 10Figure 3-3 ARINC 781 FMPA Outline and Installation Drawing, 1394-E-1200 Rev D00 (Sheet 1 of 2)
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SYSTEM DESCRIPTION, INSTALLATION, AND MAINTENANCE MANUALARINC 781 SDU, SCM, and FMPA23-15-30 3-1316 APR 10Figure 3-4 ARINC 781 FMPA Outline and Installation Drawing, 1394-E-1200 Rev D00 (Sheet 2 of 2)
SYSTEM DESCRIPTION, INSTALLATION, AND MAINTENANCE MANUALARINC 781 SDU, SCM, and FMPA23-15-30 3-1416 APR 10Blank Page
SYSTEM DESCRIPTION, INSTALLATION, AND MAINTENANCE MANUALARINC 781 SDU, SCM, and FMPA23-15-30 3-1516 APR 10Figure 3-5 ARINC 781 SCM Outline and Installation Drawing, 1394-E-1300 Rev B00 (Sheet 1 of 2)
SYSTEM DESCRIPTION, INSTALLATION, AND MAINTENANCE MANUALARINC 781 SDU, SCM, and FMPA23-15-30 3-1616 APR 10Blank Page
SYSTEM DESCRIPTION, INSTALLATION, AND MAINTENANCE MANUALARINC 781 SDU, SCM, and FMPA23-15-30 3-1716 APR 10Figure 3-6 ARINC 781 SCM Outline and Installation Drawing, 1394-E-1300 Rev B00 (Sheet 2 of 2)
SYSTEM DESCRIPTION, INSTALLATION, AND MAINTENANCE MANUALARINC 781 SDU, SCM, and FMPA23-15-30 3-1816 APR 10Blank Page
SYSTEM DESCRIPTION, INSTALLATION, AND MAINTENANCE MANUALARINC 781 SDU, SCM, and FMPA23-15-30 3-1916 APR 10Figure 3-7 ARINC 781 System Interconnect Drawing, 1394-B-1001 Rev A00 (Sheet 1 of 3)
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SYSTEM DESCRIPTION, INSTALLATION, AND MAINTENANCE MANUALARINC 781 SDU, SCM, and FMPA23-15-30 3-2116 APR 10Figure 3-8 ARINC 781 System Interconnect Drawing, 1394-B-1001 Rev A00 (Sheet 2 of 3)
SYSTEM DESCRIPTION, INSTALLATION, AND MAINTENANCE MANUALARINC 781 SDU, SCM, and FMPA23-15-30 3-2216 APR 10Blank Page
SYSTEM DESCRIPTION, INSTALLATION, AND MAINTENANCE MANUALARINC 781 SDU, SCM, and FMPA23-15-30 3-2316 APR 10Figure 3-9 ARINC 781 System Interconnect Drawing, 1394-B-1001 Rev A00 (Sheet 3 of 3)
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SYSTEM DESCRIPTION, INSTALLATION, AND MAINTENANCE MANUALARINC 781 SDU, SCM, and FMPA23-15-30 4-116 APR 10TEST AND FAULT ISOLATIONThis section provides test procedures to determine the operational readiness of SDU units. There are no operational test procedures defined for the SCM or FMPA. SCM and FMPA health are determined by accessing the SDU BITE information.If the ARINC 781 equipment passes all tests in this section but does not function according to the installation requirements, the fault may be with equipment or wiring outside the ARINC 781 system. This section includes: • Operational and Diagnostic Testing • Troubleshooting and Fault Isolation • Adjustment/Alignment Procedures • Modification History NOTE: Depending on the version of software installed, the MPU report and menu screens displayed may differ from those shown as examples in this manual.1. Operational and Diagnostic TestingThis section includes the following sections: • General • Test and Fault Isolation Equipment Requirements • Operational and Diagnostic Test ProceduresA. GeneralUsually, the ARINC 781 system requires testing for one of the following reasons: • To verify the operational readiness of the system during and after installation on an aircraft • To verify that a fault exists and produce system reports for troubleshooting purposes • To verify the operational readiness of repaired LRUs during re-installation on an aircraftThis section includes test and fault isolation procedures for the ARINC 781 system. All test and load procedures require the ARINC 781 SDU MPU, which is accessed by connecting to the maintenance port of the SDU. B. Test and Fault Isolation Equipment RequirementsTable 4-1 lists the equipment required to access the SDU MPU and perform operational and diagnostic testing on the SDU.
Table 4-1 List of Required Test Equipment Item Equipment Specification QuantityComputer Standard VT-100 386 CPU, 20 MHz or higher 1VT-100 terminal emulation programHyperTerminal©, ProComm Plus©, or equivalentSerial communication program using an RS-232 port1Cable RS-232 cable Maximum length 25 feet 1SYSTEM DESCRIPTION, INSTALLATION, AND MAINTENANCE MANUALARINC 781 SDU, SCM, and FMPA23-15-30 4-216 APR 10C. SDU MPUThis section describes the SDU MPU and provides the connection and cabling details required to access and use the program.(1) Connecting to the MPUThe MPU provides a system interface for fault isolation and diagnostic procedures.To use the SDU MPU, connect an RS-232, VT-100 terminal (computer operating a terminal emulation program) to the RS-232 maintenance port interface of the SDU. The maintenance port on the front panel of the SDU provides a direct connection to the MPU using a DB9 connector. Figure 4-1 provides cabling details for the SDU maintenance port.Figure 4-1 Maintenance Cable(a) Interface RequirementsA standard VT-100 compatible terminal running an emulator program (such as HyperTerminal, ProComm Plus, or similar) provides the user interface to the SDU MPU. The RS-232 terminal connection settings for SDU maintenance ports are listed in Table 4-2.
Table 4-2 Maintenance Port Connection Settings Parameter SettingCharacter Format ASCIIBaud Rate 19200 bpsNo. of bits 8Parity NoneStop bits 1Flow Control NoneSYSTEM DESCRIPTION, INSTALLATION, AND MAINTENANCE MANUALARINC 781 SDU, SCM, and FMPA23-15-30 4-316 APR 10(2) Using the SDU MPUThis section describes the basic procedures for using and navigating the SDU MPU.NOTE: There are various levels of access to the MPU. Each level is protected by a different password. This section describes the MPU functions available using the Level 1 password.(a) Entering PasswordsYou can enter the password any time after the SDU boots. • To access Level 1 functions, type menu.NOTE: The password does not appear on the screen when you type it.(b) Navigating the SDU MPU • To scroll through the available menus, press CTRL+N. • To go to the previous menu, press CTRL+O. • To refresh the menu screen or exit from a Reports Menu, press ESC.(c) Selecting Menu Items • To enable test or data entry functions, press the letter associated with the menu items.(d) Selecting ReportsThe reports available through the MPU enable users to view information about the configuration and status of the SDY. This information is used to troubleshoot the communication system on the aircraft.To access reports: 1. In the MPU, press EQUAL SIGN (=).A list of reports appears. Active reports show as toggled on. Inactive reports show as toggled off. 2. To activate a report, type the report number, and then press ENTER.NOTE: Multiple reports can be activated at the same time; type and enter each report number separately. 3. To turn off individual, active reports, type the report number you want to toggle off, and then press ENTER.
SYSTEM DESCRIPTION, INSTALLATION, AND MAINTENANCE MANUALARINC 781 SDU, SCM, and FMPA23-15-30 4-416 APR 10 4. To turn off all active reports, press EQUAL SIGN (=), and then press X. (3) Menu Item DescriptionsThis section provides a brief description of the Level 1, MPU menu items used for test and fault isolation procedures. In active SDUs, menu screens display the firmware version.NOTE: Depending on the version of software installed and the system configuration, the menu and reports available to users may differ slightly from the illustrations shown and described in this document.(a) Menu 1Figure 4-2 shows an example Menu 1 screen display. Ta b l e 4-3 describes the items available in Menu 1. MENU 1 FIRMWARE Vx.x GND Y explain error status U list event log (hex)F print equipment stats <CTRL> N next menu <CTRL> O previous menu = select reportsFigure 4-2 Menu 1 Screen Display(b) Menu 2 Figure 4-3 shows an example MPU Menu 2 screen display. Table 4-4 describes the items available in Menu 2. Table 4-3 Menu 1 Item Descriptions Menu Item DescriptionY: explain error status Reports error status when failure LED is illuminated. Displays OK if no error exists.F: print equipment statsPrints a list of the current equipment statistics, including temperature, number of power-ups, hours of operation, time since power-up, and processor usage.U: list event log Lists the current event log (hex format).
MENU 2 FIRMWARE Vx.x GNDL re-enter logon password V get firmware versionsZ reset A781 SDU C query loss of cooling modeH query SDU-FMPA cable loss <CTRL> N next menu <CTRL> O previous menu = select reportsSYSTEM DESCRIPTION, INSTALLATION, AND MAINTENANCE MANUALARINC 781 SDU, SCM, and FMPA23-15-30 4-516 APR 10Figure 4-3 Menu 2 Screen Display Table 4-4 Menu 2 Item Descriptions Menu Item DescriptionL: re-enter logon passwordPermits a user to enter a new access level password.Z: reset A781 SDU Enables a complete, soft reset of the SDU; once reset, the menu access password must be re-entered.H: query SDU-FMPA cable lossInitiates the cable loss determined in auto-calibration.V: get firmware versions Displays the kernel and application software versions for the Control Processor, Data I/O Processor, Channel CardsC: query loss of cooling modeIndicates if loss of cooling mode is active or inactive.(c) Menu 3Figure 4-4 shows the menu 3 screen display. Tab l e 4-5 describes the items available in Menu 3. MENU 3 FIRMWARE Vx.xF list call log G clear call logO list DIO ORT H list SCM/CP ORTY verify CP ORT<CTRL> N next menu <CTRL> O previous menu = select reportsFigure 4-4 Menu 3 Screen Display
Table 4-5 Menu 3 Item Descriptions Menu Item DescriptionF: list call log Lists Classic call logs for the following events:• Successful Aero Log-on• Air-to-ground calls accepted by the SDU• Ground-to-air calls accepted by the SDULists SBB call logs for the following events:• Attachment or modification of attachment, including change of beam ID• Creation or deletion of primary or secondary contextsO: list DIO ORT Lists of ORT items destined for the Data Processor in human readable form.Y: verify CP ORT Verifies if file name of the internal copies of the Secure and User ORT are valid or corrupted.G: clear call log Clears the call log after a confirmation.H: list SCM/CP ORT Lists ORT settings and how they were configured (either by default or through the maintenance port, or via SCM ORT files). “Set by maintenance port” indicates that the ORT parameter is set by the maintenance port.SYSTEM DESCRIPTION, INSTALLATION, AND MAINTENANCE MANUALARINC 781 SDU, SCM, and FMPA23-15-30 4-616 APR 10D. Operational and Diagnostic Test ProceduresYou can perform all test procedures presented in this section to test the total operational status of the ARINC 781 system. You can conduct these operational tests for all equipment returned to service after repair.The procedures assume that the technical personnel are familiar with the test equipment used and can operate the equipment to produce the required inputs and obtain the required results (indications). Refer to the detailed operating procedures and descriptions of the SDU MPU included in this section.CAUTION: ONLY AUTHORIZED TECHNICAL PERSONNEL WHO ARE TRAINED IN GENERAL AVIATION WORKMANSHIP AND HAVE A BASIC UNDERSTANDING OF SATCOM SYSTEMS SHOULD PERFORM THE OPERATIONAL AND DIAGNOSTIC TEST PROCEDURES IN THIS MANUAL.CAUTION: CHANGES TO DEFAULT VALUES FOR SOME MENU FUNCTIONS MAY SERIOUSLY DEGRADE SYSTEM OPERATION.NOTE: This manual describes the basic MPU functions, menus, and reports required for the testing and fault isolation procedures presented in this section. Please consult Product Support before entering any unfamiliar menu selections not described in this manual.NOTE: Using a terminal emulation program, open a log file and save all test results for future reference and test records.
SYSTEM DESCRIPTION, INSTALLATION, AND MAINTENANCE MANUALARINC 781 SDU, SCM, and FMPA23-15-30 4-716 APR 10Refer to the Outline and Installation diagrams (Figure 3-1 to Figure 3-6) and the Interconnection and Contact Assignment drawings (Figure 3-7 to Figure 3-9) for additional information.(1) Test Setup ProcedureThe test setup procedure is presented in Table 4-6. Table 4-6 Test Setup Procedure Step Action1.0 Make sure that the SDU is powered down and disconnected from the power source.2.0 Remove the maintenance-port connector cover.3.0 Connect a maintenance cable to the SDU front-panel maintenance port connector.4.0 Connect the other end of the cable to the serial port of the computer.5.0 Open a log file to capture all test data.(2) Post TestWhen testing is completed, follow the steps in Table 4-7. Table 4-7 Post Test Procedure Step Action1.0 Save the log file of the test results (or data) for future reference.2.0 Remove power from the SDU that was tested and from all other test equipment.3.0 Disconnect test equipment from the SDU.4.0 Replace the maintenance-port connector cover (if it was removed during the test setup).If the Unit Under Test (UUT) PASSED the test, re-install the unit on the aircraft.If the UUT FAILED the test, return the UUT along with a hardcopy printout of the recorded (captured) log file of the test results to the manufacturer for service and repair. Indicate the date of the test and the serial number of the UUT on the test documentation.(3) Installation and Operational Verification TestsTo verify that the ARINC 781 system is ready for operation, use the following procedures: • Power-On Test • BITE(a) Power-On TestTo complete the power-on test, follow the steps in Table 4-7.
Table 4-8 Power-On Test Procedure Step Action1.0 Follow the test setup procedure in Tab l e 4-6 on page 4-7.2.0 Power-on the SDU.3.0 Power-on the FMPA (if applicable).4.0 Check the status of the front panel LEDs. Verify that the green LED flashes for 60 seconds and then turns off. Verify that the red LED is not illuminated. For more information about the LED signals, refer to "LEDs" on page 1-11.5.0 Review the BITE status of all system components using the MCDU. Verify that all subsystems show OK status. For more information about using the MCDU, refer to "Viewing BITE Information" on page 2-8.6.0 Follow the post test procedure in Ta b l e 4-7 on page 4-7.SYSTEM DESCRIPTION, INSTALLATION, AND MAINTENANCE MANUALARINC 781 SDU, SCM, and FMPA23-15-30 4-816 APR 10(b) BITEIf equipment connected to the ARINC 781 avionics system provides wrong information or does not provide a signal to the ARINC 781 SDU, the SDU cannot function properly. You can check the status of connected equipment with the MCDU BITE screens. To check the status of connected equipment, follow the procedure described in "Viewing BITE Information" on page 2-8.The SATCOM BITE page provides information about the results from BITE for various parts of the ARINC 781 system. • If BITE fails a component, remove the component from service and return it to the equipment supplier—see "Maintenance and Repair" on page 5-1. • If BITE fails a component other than the ARINC 781 SDU, FMPA, or SCM, verify the operation of that component and test the satellite communication system again.2. Troubleshooting and Fault IsolationThis section provides troubleshooting procedures for ARINC 781 systems.Troubleshooting procedures require data obtained using the MCDU. For specific instructions on how to access and use the MCDU, refer to "Operating the MCDU" on page 2-1.NOTE: All of the MCDU pages discussed in this section are accessed from the SATCOM BITE page.A. Subsystem HealthThe SATCOM SUBSY HLTH page provides the BITE status of subsystem components. To check the subsystem health, on the SATCOM BITE page, press the key next to SUBSY HLTH.Figure 4-5 illustrates the SATCOM SUBSY HLTH page.
SYSTEM DESCRIPTION, INSTALLATION, AND MAINTENANCE MANUALARINC 781 SDU, SCM, and FMPA23-15-30 4-916 APR 10Figure 4-5 SATCOM Subsystem Health MenuTable 4-9 describes the information available on the SATCOM SUBSY HLTH menu. Table 4-9 SATCOM Subsystem Health Menu Label Description ActionLNA Reports the status of the LNA as OK, NO DATA (if golden label 350 from the antenna is missing or HGA is disconnected), TEST, or FAULT. The LNA status matches the HDA status.If the status is NO DATA, check the bus connections from the Antenna and check the speed of bus.If the status is FAULT, test or troubleshoot the LNA equipment.ANT Reports the status of the HGA as OK, FAULT, TEST, or NO DATA.If the status is FAULT, test or troubleshoot the HGA equipment. If the status is NO DATA check the ARINC 429 bus from the Antenna.FMPA Reports the status of the FMPA as OK, FAULT, NO DATA, or NONE. If there is no FMPA configured, the reported status is NONE.If the status is FAULT, return the FMPA to the equipment supplier. If the status is NO DATA check the cable to the FMPA.CONFIG PARITYReports the status of the rear connector configuration parity as OK (parity is odd) or FAULT (parity is not odd). This status can be different from the setting of Bit 25 in Label 350 to the CMC, which is also set if the secure ORT is missing or invalid.If the status is FAULT, check strapping—a non-supported configuration may be strapped.
SYSTEM DESCRIPTION, INSTALLATION, AND MAINTENANCE MANUALARINC 781 SDU, SCM, and FMPA23-15-30 4-1016 APR 10B. SATCOM System BusThe SATCOM SYSTEM BUS page provides information about the bus status of equipment outside the ARINC 781 system. SATCOM services are not available if the equipment does not operate or communicate properly.To check the bus status, on the SATCOM BITE page, press the key next to SYS BUS.Figure 4-6 illustrates the SATCOM System Bus page.Figure 4-6 SATCOM System Bus MenuTable 4-10 describes the information available on the SATCOM SYS BUS menu. Table 4-10 Bus Status IndicatorsBusStatusINACTIVE NO DATA NONE OKCFDS No labels of correct speed on bus.The expected Golden label (227) is not present.The bus is not installed.The expected Golden label is present and the bus is active at the correct speed.MCDU No labels of correct speed on bus.The expected Golden label (377) is not present.The bus is not installed.The expected Golden label is present and the bus is active at the correct speed.
SYSTEM DESCRIPTION, INSTALLATION, AND MAINTENANCE MANUALARINC 781 SDU, SCM, and FMPA23-15-30 4-1116 APR 10C. Thermal StatusAs shown in Figure 4-7, the SATCOM OVERTEMP menu reports the thermal status of system components.To check the thermal status, on the SATCOM BITE page, press the key next to OVERTEMP.IRS - PRI No labels of correct speed on bus.The expected Golden label (310) is not present.N/A The expected Golden label is present and the bus is active at the correct speed.IRS - SEC No labels of correct speed on bus.The expected Golden label (310) is not present.The IRS2Type secure ORT parameter specifies whether it is connected or not connected.The expected Golden label is present and the bus is active at the correct speed.GNSS No labels of correct speed on bus.The expected Golden label (110) is not present.The bus is not installed.The expected Golden label is present and the bus is active at the correct speed.AES ID No labels of correct speed on bus.The expected Golden label (275) is not present.The bus is not installed.The expected Golden label is present and the bus is active at the correct speed.CMU No labels of correct speed on bus.The expected Golden label (270) is not present.The bus is not installed.The expected Golden label is present and the bus is active at the correct speed.CTU Label 351 bit 27 is set to inactive.N/A The bus is not installed.Label 351 bit 27 is set to OK. Table 4-10 Bus Status IndicatorsBusStatusINACTIVE NO DATA NONE OK
SYSTEM DESCRIPTION, INSTALLATION, AND MAINTENANCE MANUALARINC 781 SDU, SCM, and FMPA23-15-30 4-1216 APR 10 Figure 4-7 SATCOM Overtemp MenuTable 4-11 describes the information available on the SATCOM OVERTEMP menu.D. SCM HealthAs shown in Figure 4-8, the SATCOM SCM menu reports the status of the communication buses to the SCM and the status of the secure and user configuration tables. Table 4-11 SATCOM OVERTEMP Menu Label Description ActionSDU Reports the SDU thermal status as OK or FAIL.If the status is FAIL, check the fan operation and temperature at the location of the equipment.HGA Reports the HGA thermal status as OK, NO DATA, or FAIL.If the status is FAIL, check the fan operation and temperature at the location of the equipment.FMPA Reports the FMPA thermal status as OK, NO DATA, or FAIL.If the status is FAIL, check the fan operation and temperature at the location of the equipment.
SYSTEM DESCRIPTION, INSTALLATION, AND MAINTENANCE MANUALARINC 781 SDU, SCM, and FMPA23-15-30 4-1316 APR 10 Figure 4-8 SATCOM SCM MenuTable 4-12 describes the information available on the SATCOM SCM menu. Table 4-12 SATCOM SCM Menu Label Description ActionSTATUS Reports the SCM status as OK or FAIL. If the status is FAIL, return the SCM to the equipment supplier.BUS TO/FROMReports the status of the bus to the SCM as OK or FAIL.If the status is FAIL, check the connections to the SCM.SECURE ORT Reports the status of the Secure ORT as one of the following:NOT LOADED – No ORT in SCM memory.OK – Secure ORT is valid.INVALID – The Secure ORT is corrupted or otherwise invalid and must be reloaded.If the status is INVALID or NOT LOADED, load a SECURE ORT file.USER ORT Reports the status of the User ORT as one of the following:NOT LOADED – No ORT in SCM memory.OK – User ORT is valid.INVALID – The User ORT is corrupted or otherwise invalid and must be reloaded.If the status is INVALID or NOT LOADED, load a USER ORT file.
SYSTEM DESCRIPTION, INSTALLATION, AND MAINTENANCE MANUALARINC 781 SDU, SCM, and FMPA23-15-30 4-1416 APR 10E. Subsystem Bus StatusAs shown in Figure 4-9, the SATCOM SUBSY BUS menu reports the status of all subsystem buses that provide communication between the components of the system. Figure 4-9 SATCOM Subsystem Bus MenuTable 4-13 describes the information available on the SATCOM SUBSY BUS menu. Fields are left blank if the equipment is not included in the installation.NOTE: Input and output are with respect to the SDU.F. RF Pa t h Statu sAs shown in Figure 4-10, the SATCOM RF PATH menu reports the status the RF paths of a system with an FMPA installed. Table 4-13 SATCOM SUBSY BUS Menu Label Description ActionANT Reports the status of the input and output buses for the antenna as OK, NO DATA, or FAIL.If status is NO DATA, label 350 is missing—check the bus connections.HPA Reports the status of the input and output buses for the HPA as OK, NO DATA, NONE, or FAIL.If status is NO DATA, label 350 is missing—check the bus connections.
SYSTEM DESCRIPTION, INSTALLATION, AND MAINTENANCE MANUALARINC 781 SDU, SCM, and FMPA23-15-30 4-1516 APR 10 Figure 4-10 SATCOM RF Path Menu, System with FMPATable 4-14 describes the information available on the SATCOM RF PATH menu.G. USIM and Data Bus StatusAs shown in Figure 4-11, the SATCOM USIM/DATA menu reports the status of the USIMs and data buses of the system. Table 4-14 SATCOM RF PATH Menu Label DescriptionRX:SDU-DLNA Reports the status of the RF path from the DLNA to the SDU as OK or FAULT.TX:SDU-FMPA Reports the status of the RF path from the SDU to the FMPA as OK or FAULT. For systems not configured for FMPA, the status is N/A.TX:FMPA-ANT Reports the status of the RF path from the FMPA to the antenna as OK or FAULT. For systems not configured for FMPA, the status is N/A.VSWR Reports the status of the VSWR between the FMPA and the antenna as OK or FAULT. For systems not configured for FMPA, the status is N/A.
SYSTEM DESCRIPTION, INSTALLATION, AND MAINTENANCE MANUALARINC 781 SDU, SCM, and FMPA23-15-30 4-1616 APR 10 Figure 4-11 SATCOM USIM/DATA MenuTable 4-15 describes the information available on the USIM/Data menu.H. ORTThe ARINC 781 system may not function properly if the ORT parameters do not match the installed system.(1) ORT Use and StorageThe ARINC 781 system includes a secure and user ORT. Secure ORT files must be certified for the aircraft type on which the equipment is installed. Items in user ORT files can be modified by individual customers and may be customized to an individual aircraft.You can change secure ORT parameters only by uploading an ORT file. To obtain an ORT file, contact Product Support. Table 4-15 SATCOM USIM/DATA Menu Label DescriptionUSIM#1 Reports the status of USIM#1 bus as OK, WARMING, SBB LOG, FAULT, or N/A if channel card 1 is not in SBB mode.ETH#1 Reports the status of ETH#1 bus as DISABLED, LINK, or NO LINK.ETH#2 Reports the status of ETH#2 bus as DISABLED, LINK, or NO LINK.QUAD ETH#3 Reports the status of QUAD ETH#3 bus as DISABLED, LINK, or NO LINK.QUAD ETH#4 Reports the status of QUAD ETH#4 bus as DISABLED, LINK, or NO LINK.ETH#5 Reports the status of ETH#5 bus as DISABLED, LINK, or NO LINK.
SYSTEM DESCRIPTION, INSTALLATION, AND MAINTENANCE MANUALARINC 781 SDU, SCM, and FMPA23-15-30 4-1716 APR 10The load procedure loads an ORT file to the SCM using an ARINC 615A data loader. You can only load ORT data when the aircraft is on the ground and the data load discrete is asserted. When the SDU boots, it compares the ORT file in its memory to that in the SCM. If the ORT files do not match, the SDU loads the file from the SCM into its memory.Some user ORT parameters can be modified in the SDU ORT. You can reset the SDU ORT to the default values stored in the SCM in the maintenance menus.(2) Checking the ORTYou can check the content of the ORT file through the maintenance port menus. "SDU MPU" on page 4-2 provides information about accessing the maintenance port menus.NOTE: The ORT includes many parameters that affect internal operations. These parameters are not meaningful for technicians troubleshooting the satellite communication system.To check the ORT: 1. In the maintenance port menus, navigate to menu 3. 2. To list the ORT, press h. The list of ORT parameters appears. The list is about eight pages long. Some ORT parameters displayed are system defaults that cannot be modified through the secure and user ORT files. 3. Compare the ORT parameters to the system installed in the aircraft.I. Contact Product SupportWhen the troubleshooting procedures do not find a fault and the ARINC 781 system does not function properly, contact Product Support.Product Support may ask you to capture and send them system specific logs and reports.To access logs: 1. In the maintenance port menus, navigate to Menu 3. 2. Turn on the text capture feature of the terminal emulator on your computer. In HyperTerminal, click Transfer, and then click Capture Text. 3. To view the call log, in Menu 3, press f. 4. To view the event log, in Menu 3, press s.NOTE: The event log includes information about internal events that enable Product Support to monitor the processes of the ARINC 781 system. This log does not provide information for the end user. 5. Turn off the text capture feature of the terminal emulator and send the captured file to Product Support.
SYSTEM DESCRIPTION, INSTALLATION, AND MAINTENANCE MANUALARINC 781 SDU, SCM, and FMPA23-15-30 4-1816 APR 10To access reports: 1. Turn on the text capture feature of the terminal emulator on your computer. In HyperTerminal, click Transfer, and then click Capture Text. 2. In the maintenance port menus, press EQUAL SIGN (=). A list of reports appears. 3. To activate a report, type the number next to the report description, and then press ENTER.NOTE: Product Support will specify the required reports, and may ask you to operate the ARINC 781 equipment while the reports gather information. 4. To stop a report, press EQUAL SIGN (=), then type the number of the report, and then press ENTER.NOTE: To stop all reports, press X. 5. Turn off the text capture feature of the terminal emulator and send the captured file to Product Support.3. Adjustment/Alignment ProceduresThere are no adjustment/alignment procedures required for the ARINC 781 system.4. Modification HistoryThe ARINC 781 system currently has no history of modifications.
SYSTEM DESCRIPTION, INSTALLATION, AND MAINTENANCE MANUALARINC 781 SDU, SCM, and FMPA23-15-30 5-116 APR 10MAINTENANCE AND REPAIRThis section provides maintenance and repair information for the ARINC 781 system, including the following sections: • Maintenance • Repair • Instructions for Continued Airworthiness • Visual Inspection and Check1. MaintenanceThe ARINC 781 system does not require routine maintenance.2. RepairIf functional problems occur, the SDU BITE identifies the faulty LRU.As per continued airworthiness instructions, if an SDU, SCM, or FMPA is inoperative, use the Standard Practices Chapter of the Aircraft Maintenance Manual to: • remove the unit • secure cables and wiring • collar applicable switches and circuit breakers, and placard them as “inoperative”Before flight, revise the equipment list and weight and balance data as applicable, and record the removal of the unit in the log book [refer to section 91.213 of the FAR or the aircraft’s minimum equipment list (MEL)].All repairs must be performed at the equipment supplier factory.3. Instructions for Continued AirworthinessPeriodic inspections of the mechanical and electrical interfaces of the ARINC 781 system components to the aircraft should be completed as defined by the governing airworthiness body’s Instructions for Continued Airworthiness (ICA) for the installation (for example, Transport Canada, the FAA, the EASA).Installation of the ARINC 781 SATCOM Avionics System on an aircraft by Supplemental Type Certificate (STC) obligates the aircraft operator to include the maintenance information supplied by this manual in the operator’s Aircraft Maintenance manual and the operator’s Aircraft Scheduled Maintenance Program. This section provides the special instructions and maintenance requirements for continued airworthiness of the ARINC 781 system.
SYSTEM DESCRIPTION, INSTALLATION, AND MAINTENANCE MANUALARINC 781 SDU, SCM, and FMPA23-15-30 5-216 APR 10A. Airworthiness LimitationsWhen applicable, the Airworthiness Limitations section is FAA-approved, and specifies maintenance required under Title 14 Code of Federal Regulations (CFR) Part 43.16 and 14 CFR 91.403 of the Federal Aviation Regulations unless an alternative program has been FAA approved.This section must be added to the Airplane Maintenance Manuals. The information contained herein supplements the Airplane Maintenance Manuals only in those areas covered by the ARINC 781 system installation. For limitations and procedures not contained in this supplement, consult the basic Airplane Maintenance Manuals.The inspections and airworthiness limitations specified in this section are FAA approved. This section specifies the inspections and other maintenance required under sections 433.16 and 91.403 of the Federal Aviation Regulations unless an alternative program has been FAA approved.B. Electrical and Mechanical Inspection and CheckPeriodic inspections of the mechanical and electrical interfaces of the A781 system components to the aircraft should be completed as defined by the governing airworthiness body (for example, Transport Canada, the FAA, the EASA). C. Instructions for Continued AirworthinessThe following paragraphs describe all maintenance requirements and instructions for continued airworthiness of the ARINC 781 avionics system: 1. This manual contains maintenance information for the SDU, SCM, and FMPA, including system description, system operation, installation, test, and fault isolation. 2. Add the following information to the illustrated parts catalog for the aircraft: • all part numbers referred to in this manual • all LRUs referred to in this manual 3. Add all wiring diagram information contained in this manual to the aircraft operator’s appropriate aircraft Wiring Diagram Manuals. 4. No additional or routine maintenance is required for the on-condition SDU, SCM, and FMPA. 5. If an SDU, SCM, or FMPA is inoperative, follow the instructions listed in "Repair" on page 5-1. 6. Return all units to the equipment supplier factory for repair. See Appendix A: Return Material Authorization for detailed removal information and procedures. 7. Install repaired units on the aircraft in accordance with the installation instructions provided in this manual. 8. Make sure that all repaired units are operating before approving them for return to service, using the operational verification tests and procedures provided in this manual. 9. Enter the approval for return to service in the logbook, as required by section 43.9 of the FAR.
SYSTEM DESCRIPTION, INSTALLATION, AND MAINTENANCE MANUALARINC 781 SDU, SCM, and FMPA23-15-30 5-316 APR 10 10. Add the following scheduled maintenance tasks to the aircraft operator’s appropriate aircraft maintenance program: 1. Recommended periodic scheduled servicing tasks: None required. 2. Recommended periodic inspections: as per the aircraft inspection and maintenance schedule. 3. Recommended periodic scheduled preventative maintenance tests (tests to determine system condition and/or latent failures): None required.4. Visual Inspection and CheckPerform the following procedures to inspect the SDU, SCM, and FMPA after installation of the units onto the aircraft.Follow all approved safety standards and practices during the inspection. 1. Disconnect all circuit breakers to the SDU, SCM, and FMPA and associated systems.CAUTION: FAILURE TO DISCONNECT CIRCUIT BREAKERS CAN LEAD TO INJURY TO THE OPERATOR AND DAMAGE TO THE EQUIPMENT. 2. Examine the connection for loose, damaged, or missing hardware. 3. Examine cables and connections. Contact Product Support to gauge the severity of the damage if you find: •corrosion • chafing • wear • damage 4. Tighten any loose connectors to the manufacturer’s recommended value.
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SYSTEM DESCRIPTION, INSTALLATION, AND MAINTENANCE MANUALARINC 781 SDU, SCM, and FMPA23-15-30 A-116 APR 10APPENDIX A: RETURN MATERIAL AUTHORIZATIONTo return equipment to the equipment supplier for repair, this RMA procedure must be followed. Failure to comply with this procedure may result in shipping delays and additional charges.1. Warranty ReturnsEquipment that qualifies for warranty repair can be returned to the equipment supplier for repair or replacement at their discretion. The customer shall pay the shipping costs to the equipment supplier and the equipment supplier will pay the shipping costs to return the repaired/replaced unit to the customer.2. Non-Warranty ReturnsEquipment that fails to work properly because of improper or negligent use, abuse, shipping damage, or any other condition can still be returned to the equipment supplier for repair or replacement at their discretion. The customer will be notified of the cost to repair or replace the unit before invoicing for the repair or replacement. The customer shall pay for the shipping costs to and from the equipment supplier.3. Repackaging RequirementsARINC 781 SDU or SCM components must be returned to the equipment supplier in approved shipping containers. Failure to do so may invalidate the warranty.If SDU or SCM shipping containers are unavailable, they can be ordered from the equipment supplier when requesting the RMA number.4. RMA ProcedureIf it is determined that equipment must be returned to the equipment supplier for repair or overhaul, follow the RMA procedure below. 1. Have the following information ready before calling Product Support: • Model (e.g., ARINC 781 SDU) • Unit part number (e.g., 1394-A-1100) • Serial number • Description of failure • Aircraft tail number, serial number, and aircraft model number 2. Call Product Support. 3. A Product Support specialist will attempt to resolve the problem by telephone. If equipment must be returned to the equipment supplier, the Product Support Specialist will authorize the R&O Coordinator to issue an RMA number.
SYSTEM DESCRIPTION, INSTALLATION, AND MAINTENANCE MANUALARINC 781 SDU, SCM, and FMPA23-15-30 A-216 APR 10 4. Pack the equipment in the original shipping container or a container approved by the equipment supplier. 5. Write the RMA number on the outside of the shipping container and on all shipping documents, enclose a copy in the box, and send your prepaid shipment to the equipment supplier. 6. Fax or email the details of the shipment to the R&O Coordinator, including the following information: Shipment date, carrier name, and the waybill number.

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