Honeywell RTA-50D VHFAIRBORNE VOICE / DATA TRANSCEIVER User Manual User s Manual

Honeywell International Inc. VHFAIRBORNE VOICE / DATA TRANSCEIVER User s Manual

User's Manual

Honeywell International Inc.15001 N.E. 36 StreetRedmond, Washington 98052-5317U.S.A.CAGE: 97896Telephone: (800) 601-3099 (Toll Free U.S.A./Canada)Telephone: (602) 365-3099 (International Direct)Telephone: 00-800-601-30999 (EMEA Toll Free)Telephone: 420-234-625-500 (EMEA Direct)Web site: www.myaerospace.comMaintenance ManualRTA-50D VHF Data Radio SystemPart Number CAGE965-1696-021 97896965-1696-051 97896Legal NoticeExport ControlThis document contains technical data and is subject to U.S. export regulations. These commodities, technology, orsoftware were exported from the United States in accordance with the export administration regulations. Diversion contraryto U.S. law is prohibited.ECCN: 7E994, NLR Eligible.23-20-59Page T-1Publication Number D201010000047, Revision 0 Initial 1 Mar 2011©Honeywell International Inc. Do not copy without express permission of Honeywell.
MAINTENANCE MANUAL965-1696Proprietary Information Honeywell - ConfidentialTHIS COPYRIGHTED WORK AND ALL INFORMATION ARE THE PROPERTY OF HONEYWELLINTERNATIONAL INC., CONTAIN TRADE SECRETS AND MAY NOT, IN WHOLE OR IN PART, BE USED,DUPLICATED, OR DISCLOSED FOR ANY PURPOSE WITHOUT PRIOR WRITTEN PERMISSION OFHONEYWELL INTERNATIONAL INC. ALL RIGHTS RESERVED.Honeywell Materials License AgreementThe documents and information contained herein ("the Materials") are the proprietary data of HoneywellInternational Inc. and Honeywell Intellectual Properties Inc. (collectively "Honeywell"). These Materialsare provided for the exclusive use of Honeywell Service Centers; Honeywell-authorized repair facilities;operators of Honeywell aerospace products subject to an applicable product support agreement, theirwholly owned-subsidiaries or a formally designated third party service provider; and direct recipients ofMaterials from Honeywell’s Aerospace Technical Publication Distribution. The terms and conditions ofthis License Agreement govern your use of these Materials, except to the extent that any terms andconditions of another applicable agreement with Honeywell regarding the operation, maintenance, orrepair of Honeywell aerospace products conflict with the terms and conditions of this License Agreement,in which case the terms and conditions of the other agreement will govern. However, this LicenseAgreement will govern in the event of a conflict between its terms and conditions and those of a purchaseorder or acknowledgement.1. License Grant - If you are a party to an applicable product support agreement, a Honeywell ServiceCenter agreement, or an authorized repair facility agreement, Honeywell hereby grants you a limited,non-exclusive license to use these Materials to operate, maintain, or repair Honeywell aerospace productsonly in accordance with that agreement.If you are a direct recipient of these Materials from Honeywell’s Aerospace Technical PublicationDistribution and are not a party to an agreement related to the operation, maintenance or repair ofHoneywell aerospace products, Honeywell hereby grants you a limited, non-exclusive license to usethese Materials to maintain or repair the subject Honeywell aerospace products only at the facility towhich these Materials have been shipped ("the Licensed Facility"). Transfer of the Materials to anotherfacility owned by you is permitted only if the original Licensed Facility retains no copies of the Materialsand you provide prior written notice to Honeywell.2. Rights In Materials - Honeywell retains all rights in these Materials and in any copies thereof that are notexpressly granted to you, including all rights in patents, copyrights, trademarks, and trade secrets. Nolicense to use any Honeywell trademarks or patents is granted under this License Agreement.3. Confidentiality - You acknowledge that these Materials contain information that is confidential andproprietary to Honeywell. You agree to take all reasonable efforts to maintain the confidentiality of theseMaterials.4. Assignment And Transfer - This License Agreement may be assigned to a formally designated servicedesignee or transferred to a subsequent owner or operator of an aircraft containing the subject Honeywellaerospace products. However, the recipient of any such assignment or transfer must assume all ofyour obligations under this License Agreement. No assignment or transfer shall relieve any party ofany obligation that such party then has hereunder.5. Copies of Materials - Unless you have the express written permission of Honeywell, you may notmake or permit making of copies of the Materials. Notwithstanding the foregoing, you may make copiesof only portions of the Material for your internal use. You agree to return the Materials and any copiesthereof to Honeywell upon the request of Honeywell.23-20-59 Page T-21 Mar 2011© Honeywell International Inc. Do not copy without express permission of Honeywell.
MAINTENANCE MANUAL965-16966. Term - This License Agreement is effective until terminated as set forth herein. This License Agreementwill terminate immediately, without notice from Honeywell, if you fail to comply with any provision of thisLicense Agreement or will terminate simultaneously with the termination or expiration of your applicableproduct support agreement, authorized repair facility agreement, or your formal designation as a third partyservice provider. Upon termination of this License Agreement, you will return these Materials to Honeywellwithout retaining any copies and will have one of your authorized officers certify that all Materials havebeen returned with no copies retained.7. Remedies - Honeywell reserves the right to pursue all available remedies and damages resulting froma breach of this License Agreement.8. Limitation of Liability - Honeywell does not make any representation regarding the use or sufficiency ofthe Materials. THERE ARE NO OTHER WARRANTIES, WHETHER WRITTEN OR ORAL, EXPRESS,IMPLIED OR STATUTORY, INCLUDING, BUT NOT LIMITED TO, (i) WARRANTIES ARISING FROMCOURSE OF PERFORMANCE, DEALING, USAGE, OR TRADE, WHICH ARE HEREBY EXPRESSLYDISCLAIMED, OR (ii) WARRANTIES AGAINST INFRINGEMENT OF INTELLECTUAL PROPERTYRIGHTS OF THIRD PARTIES, EVEN IF HONEYWELL HAS BEEN ADVISED OF ANY SUCHINFRINGEMENT. IN NO EVENT WILL HONEYWELL BE LIABLE FOR ANY INCIDENTAL DAMAGES,CONSEQUENTIAL DAMAGES, SPECIAL DAMAGES, INDIRECT DAMAGES, LOSS OF PROFITS, LOSSOF REVENUES, OR LOSS OF USE, EVEN IF INFORMED OF THE POSSIBILITY OF SUCH DAMAGES.TO THE EXTENT PERMITTED BY APPLICABLE LAW, THESE LIMITATIONS AND EXCLUSIONS WILLAPPLY REGARDLESS OF WHETHER LIABILITY ARISES FROM BREACH OF CONTRACT, WARRANTY,TORT (INCLUDING BUT NOT LIMITED TO NEGLIGENCE), BY OPERATION OF LAW, OR OTHERWISE.9. Controlling Law - This License shall be governed and construed in accordance with the laws of theState of New York without regard to the conflicts of laws provisions thereof. This license sets forth theentire agreement between you and Honeywell and may only be modified by a writing duly executed bythe duly authorized representatives of the parties.Safety AdvisoryWARNING: BEFORE THE MATERIALS CALLED OUT IN THIS PUBLICATION ARE USED, KNOW THEHANDLING, STORAGE AND DISPOSAL PRECAUTIONS RECOMMENDED BY THE MANUFACTUREROR SUPPLIER. FAILURE TO OBEY THE MANUFACTURERS’ OR SUPPLIERS’ RECOMMENDATIONSCAN RESULT IN PERSONAL INJURY OR DISEASE.This publication describes physical and chemical processes which can make it necessary to use chemicals,solvents, paints, and other commercially available materials. The user of this publication must get theMaterial Safety Data Sheets (OSHA Form 174 or equivalent) from the manufacturers or suppliers of thematerials to be used. The user must know the manufacturer/supplier data and obey the procedures,recommendations, warnings and cautions set forth for the safe use, handling, storage, and disposalof the materials.Warranty/Liability AdvisoryWARNING: HONEYWELL ASSUMES NO RESPONSIBILITY FOR ANY HONEYWELL EQUIPMENTWHICH IS NOT MAINTAINED AND/OR REPAIRED IN ACCORDANCE WITH HONEYWELL’SPUBLISHED INSTRUCTIONS AND/OR HONEYWELL’S FAA/SFAR 36 REPAIR AUTHORIZATION.NEITHER DOES HONEYWELL ASSUME RESPONSIBILITY FOR SPECIAL TOOLS AND TESTEQUIPMENT FABRICATED BY COMPANIES OTHER THAN HONEYWELL.WARNING: INCORRECTLY REPAIRED COMPONENTS CAN AFFECT AIRWORTHINESS ORDECREASE THE LIFE OF THE COMPONENTS. INCORRECTLY FABRICATED SPECIAL TOOLINGOR TEST EQUIPMENT CAN RESULT IN DAMAGE TO THE PRODUCT COMPONENTS OR GIVEUNSATISFACTORY RESULTS.23-20-59 Page T-31 Mar 2011© Honeywell International Inc. Do not copy without express permission of Honeywell.
MAINTENANCE MANUAL965-1696Copyright - NoticeCopyright 2011 Honeywell International Inc. All rights reserved.Honeywell is a registered trademark of Honeywell International Inc.All other marks are owned by their respective companies.THIS IS THE CMM FOSI - DATE: 2010121723-20-59 Page T-41 Mar 2011© Honeywell International Inc. Do not copy without express permission of Honeywell.
MAINTENANCE MANUAL965-1696TRANSMITTAL INFORMATIONTHIS IS AN INITIAL RELEASE OF RTA-50D VHF DATA RADIO SYSTEM MM ATA NO. 23-20-59 AND ISISSUED FOR USE IN SUPPORT OF THE FOLLOWING:Table TI-1. Applicable ComponentsComponent PN Nomenclature965-1696-021RTA-50D VHF Data Radio System965-1696-051 RTA-50D VHF Data Radio SystemRevision HistoryTable TI-2 shows the revision history of this MM.Table TI-2. Revision HistoryRevision Number Revision Date01 Mar 2011EFFECTIVITYALL 23-20-59 Page TI-11 Mar 2011© Honeywell International Inc. Do not copy without express permission of Honeywell.
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MAINTENANCE MANUAL965-1696RECORD OF REVISIONSFor each revision, write the revision number, revision date, date put in the manual, and your initials in theapplicable column.NOTE: Refer to the Revision History in the TRANSMITTAL INFORMATION section for revision data.EFFECTIVITYALL 23-20-59 Page RR-11 Mar 2011© Honeywell International Inc. Do not copy without express permission of Honeywell.
MAINTENANCE MANUAL965-1696Blank PageEFFECTIVITYALL 23-20-59 Page RR-21 Mar 2011© Honeywell International Inc. Do not copy without express permission of Honeywell.
MAINTENANCE MANUAL965-1696RECORD OF TEMPORARY REVISIONSInstructions on each page of a temporary revision tell you where to put the pages in your manual. Removethe temporary revision pages only when discard instructions are given. For each temporary revision, put theapplicable data in the record columns on this page.Definition of Status column: TR can be active, cancelled, or incorporated. If TR is incorporated, list the revisionnumber. For example, enter: INC Rev 7. If TR is replaced by another TR, then put “Cancelled”. For example:Cancelled by TR NN-NN. “Active” is entered by the holder of manual.Date DateTemporary Put RemovedRevision Page Issue in fromNumber Status Number Date Manual By Manual ByEFFECTIVITYALL 23-20-59 Page RTR-11 Mar 2011© Honeywell International Inc. Do not copy without express permission of Honeywell.
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MAINTENANCE MANUAL965-1696SERVICE BULLETIN LISTService Bulletin / Date Put inRevision Number Title Modification ManualEFFECTIVITYALL 23-20-59 Page SBL-11 Mar 2011© Honeywell International Inc. Do not copy without express permission of Honeywell.
MAINTENANCE MANUAL965-1696Blank PageEFFECTIVITYALL 23-20-59 Page SBL-21 Mar 2011© Honeywell International Inc. Do not copy without express permission of Honeywell.
MAINTENANCE MANUAL965-1696LIST OF EFFECTIVE PAGESSubheading and Page Date Subheading and Page DateTitleT-1 1 Mar 2011T-2 1 Mar 2011T-3 1 Mar 2011T-4 1 Mar 2011Transmittal InformationTI-1 1 Mar 2011TI-2 1 Mar 2011Record of RevisionsRR-1 1 Mar 2011RR-2 1 Mar 2011Record of Temporary RevisionsRTR-1 1 Mar 2011RTR-2 1 Mar 2011Service Bulletin ListSBL-1 1 Mar 2011SBL-2 1 Mar 2011List of Effective PagesLEP-1 1 Mar 2011LEP-2 1 Mar 2011Table of ContentsTC-1 1 Mar 2011TC-2 1 Mar 2011TC-3 1 Mar 2011TC-4 1 Mar 2011TC-5 1 Mar 2011TC-6 1 Mar 2011IntroductionINTRO-1 1 Mar 2011INTRO-2 1 Mar 2011INTRO-3 1 Mar 2011INTRO-4 1 Mar 2011INTRO-5 1 Mar 2011INTRO-6 1 Mar 2011INTRO-7 1 Mar 2011INTRO-8 1 Mar 2011INTRO-9 1 Mar 2011INTRO-10 1 Mar 2011INTRO-11 1 Mar 2011INTRO-12 1 Mar 2011INTRO-13 1 Mar 2011INTRO-14 1 Mar 2011INTRO-15 1 Mar 2011INTRO-16 1 Mar 2011INTRO-17 1 Mar 2011INTRO-18 1 Mar 2011INTRO-19 1 Mar 2011INTRO-20 1 Mar 2011Description and Operation11Mar201121Mar201131Mar201141Mar201151Mar201161Mar201171Mar201181Mar201191Mar201110 1 Mar 201111 1 Mar 201112 1 Mar 201113 1 Mar 201114 1 Mar 201115 1 Mar 201116 1 Mar 201117 1 Mar 201118 1 Mar 201119 1 Mar 201120 1 Mar 2011F 21/22 1 Mar 2011F 23/24 1 Mar 201125 1 Mar 201126 1 Mar 2011F 27/28 1 Mar 2011* indicates pages changed or added dataF indicates a right foldoutLF indicates a left foldoutEFFECTIVITYALL 23-20-59 Page LEP-11 Mar 2011© Honeywell International Inc. Do not copy without express permission of Honeywell.
MAINTENANCE MANUAL965-1696LIST OF EFFECTIVE PAGES (Cont)Subheading and Page Date Subheading and Page Date29 1 Mar 201130 1 Mar 2011F 31/32 1 Mar 201133 1 Mar 201134 1 Mar 201135 1 Mar 201136 1 Mar 201137 1 Mar 201138 1 Mar 2011F 39/40 1 Mar 201141 1 Mar 201142 1 Mar 201143 1 Mar 201144 1 Mar 201145 1 Mar 201146 1 Mar 2011 Fault Isolation1001 1 Mar 20111002 1 Mar 20111003 1 Mar 20111004 1 Mar 20111005 1 Mar 20111006 1 Mar 2011Maintenance Practices2001 1 Mar 20112002 1 Mar 20112003 1 Mar 20112004 1 Mar 20112005 1 Mar 20112006 1 Mar 20112007 1 Mar 20112008 1 Mar 20112009 1 Mar 20112010 1 Mar 20112011 1 Mar 20112012 1 Mar 2011F 2013/2014 1 Mar 2011F 2015/2016 1 Mar 2011F 2017/2018 1 Mar 2011F 2019/2020 1 Mar 2011 * indicates pages changed or added dataF indicates a right foldoutLF indicates a left foldoutEFFECTIVITYALL 23-20-59 Page LEP-21 Mar 2011© Honeywell International Inc. Do not copy without express permission of Honeywell.
MAINTENANCE MANUAL965-1696TABLE OF CONTENTSLIST OF SECTIONSTitle PageINTRODUCTION1. How to Use This Manual (TASK 23-20-59-99F-801-A01)................................ INTRO-1A. General (Subtask 23-20-59-99F-001-A01) .......................................... INTRO-1B. Observance of Manual Instructions (Subtask 23-20-59-99F-002-A01) .......... INTRO-1C. Symbols (Subtask 23-20-59-99F-003-A01) ......................................... INTRO-1D. Units of Measure (Subtask 23-20-59-99F-004-A01) ............................... INTRO-4E. Page Number Block Explanation (Subtask 23-20-59-99F-005-A01) ............. INTRO-4F. Application of Maintenance Task Oriented Support System(MTOSS) (Subtask 23-20-59-99F-006-A01) ........................................ INTRO-4G. Standard Practices Manual (Subtask 23-20-59-99F-007-A01) ................... INTRO-14H. Electrostatic Discharge (Subtask 23-20-59-99F-008-A01) ........................ INTRO-142. Customer Support (TASK 23-20-59-99F-802-A01) ....................................... INTRO-14A. Honeywell Aerospace Online Technical Publications WebSite (Subtask 23-20-59-99F-009-A01)............................................... INTRO-14B. Global Customer Care Center (Subtask 23-20-59-99F-010-A01) ................ INTRO-143. References (TASK 23-20-59-99F-803-A01) ............................................... INTRO-14A. Honeywell/Vendor Publications (Subtask 23-20-59-99F-011-A01) ............... INTRO-14B. Other Publications (Subtask 23-20-59-99F-012-A01).............................. INTRO-154. Acronyms and Abbreviations (TASK 23-20-59-99F-804-A01) ........................... INTRO-15A. General (Subtask 23-20-59-99F-013-A01) .......................................... INTRO-155. Process Verification (TASK 23-20-59-99F-805-A01) ..................................... INTRO-19A. Verification Data (Subtask 23-20-59-99F-014-A01) ................................ INTRO-19DESCRIPTION AND OPERATION1. Description (TASK 23-20-59-870-801-A01) ............................................... 1A. General (Subtask 23-20-59-870-001-A01) .......................................... 1B. Job Setup Data (Subtask 23-20-59-99C-001-A01) ................................. 5C. Purpose of Equipment (Subtask 23-20-59-870-002-A01) ......................... 6D. Equipment Required but Not Supplied (Subtask 23-20-59-870-003-A01) ....... 72. Configurations Available (TASK 23-20-59-870-802-A01) ................................ 7A. General (Subtask 23-20-59-870-004-A01) .......................................... 7B. Environmental Certification (Subtask 23-20-59-870-005-A01) .................... 83. System Description (TASK 23-20-59-870-803-A01) ...................................... 9EFFECTIVITYALL 23-20-59 Page TC-11 Mar 2011© Honeywell International Inc. Do not copy without express permission of Honeywell.
MAINTENANCE MANUAL965-1696TABLE OF CONTENTS (Cont)LIST OF SECTIONS (Cont)Title PageA. RTA-50D VDR Data Radio System (Subtask 23-20-59-870-006-A01) ........... 9B. Description of Equipment (Subtask 23-20-59-870-007-A01) ...................... 10C. ARINC 716 Data Mode (Subtask 23-20-59-870-008-A01) ........................ 12D. ARINC 750 Mode A and Mode 2 (Subtask 23-20-59-870-009-A01) ............. 134. System Component Description (TASK 23-20-59-870-804-A01) ....................... 14A. RTA-50D VDR (Subtask 23-20-59-870-010-A01) .................................. 14B. Other Components in the System (Subtask 23-20-59-870-011-A01) ............ 155. Operation (TASK 23-20-59-870-805-A01) ................................................. 15A. Voice Mode (Subtask 23-20-59-870-012-A01) ..................................... 15B. Mode 0 Data (Subtask 23-20-59-870-013-A01) .................................... 15C. Mode A Data (Subtask 23-20-59-870-014-A01) .................................... 16D. VDL Mode 2 (Subtask 23-20-59-870-015-A01)..................................... 16E. VDL Mode 3 (Subtask 23-20-59-870-016-A01)..................................... 17F. VDL Mode 4 (Subtask 23-20-59-870-017-A01)..................................... 186. Theory of Operation (TASK 23-20-59-870-806-A01) ..................................... 19A. VDR Overview (Subtask 23-20-59-870-018-A01) .................................. 19B. RTA-50D VDR System Architecture (Subtask 23-20-59-870-019-A01) .......... 25C. RF CCA (Subtask 23-20-59-870-020-A01) ......................................... 29D. Digital Processor CCA (Subtask 23-20-59-870-021-A01) ......................... 37E. Front Panel I/O Board (Subtask 23-20-59-870-022-A01) .......................... 45F. Power Supply (Subtask 23-20-59-870-023-A01) ................................... 45G. Rear Interconnect (Subtask 23-20-59-870-024-A01) .............................. 45FAULT ISOLATION1. Planning Data (TASK 23-20-59-99C-801-A01) ........................................... 1001A. Reason for the Job (Subtask 23-20-59-99C-002-A01)............................. 1001B. Job Setup Data (Subtask 23-20-59-99C-003-A01) ................................. 10012. Procedure (TASK 23-20-59-810-801-A01) ................................................ 1001A. Job Setup (Subtask 23-20-59-810-001-A01) ....................................... 1001B. Functional Self-Test (Subtask 23-20-59-810-002-A01) ............................ 1001C. RTA-50D VDR Test Results (Subtask 23-20-59-810-003-A01) ................... 1002D. Job Close-up (Subtask 23-20-59-810-004-A01) .................................... 1005EFFECTIVITYALL 23-20-59 Page TC-21 Mar 2011© Honeywell International Inc. Do not copy without express permission of Honeywell.
MAINTENANCE MANUAL965-1696TABLE OF CONTENTS (Cont)LIST OF SECTIONS (Cont)Title PageMAINTENANCE PRACTICES1. Planning Data (TASK 23-20-59-99C-802-A01) ........................................... 2001A. Reason for the Job (Subtask 23-20-59-99C-004-A01)............................. 2001B. Job Setup Data (Subtask 23-20-59-99C-005-A01) ................................. 20012. Inspection After Unpacking (TASK 23-20-59-000-801-A01) ............................. 2001A. General (Subtask 23-20-59-000-001-A01) .......................................... 20013. Preinstallation Testing (TASK 23-20-59-000-802-A01) ................................... 2001A. Overview (Subtask 23-20-59-000-002-A01) ........................................ 20014. Equipment Changes and Marking (TASK 23-20-59-000-803-A01) ..................... 2002A. Overview (Subtask 23-20-59-000-003-A01) ........................................ 20025. Interchangeability (TASK 23-20-59-000-804-A01) ........................................ 2002A. Overview (Subtask 23-20-59-000-004-A01) ........................................ 20026. Installation (TASK 23-20-59-000-805-A01) ................................................ 2002A. General (Subtask 23-20-59-000-005-A01) .......................................... 2002B. Location of Equipment (Subtask 23-20-59-000-006-A01) ......................... 2002C. Interwiring and Cable Fabrication (Subtask 23-20-59-000-007-A01) ............ 2003D. Installation of System (Subtask 23-20-59-000-008-A01) .......................... 20087. Inspection and System Check Procedures (TASK 23-20-59-000-806-A01) ........... 2009A. Inspection (Subtask 23-20-59-000-009-A01) ....................................... 2009B. System Checkout (Subtask 23-20-59-000-010-A01)............................... 2009C. Flight Tests (Subtask 23-20-59-000-011-A01) ...................................... 20108. Removal and Replacement (TASK 23-20-59-000-807-A01)............................. 2010A. Removal (Subtask 23-20-59-000-012-A01) ......................................... 2010B. Replacement (Subtask 23-20-59-000-013-A01) .................................... 20119. Maintenance Procedures (TASK 23-20-59-000-808-A01) ............................... 2011A. Adjustments and Alignments (Subtask 23-20-59-000-014-A01) .................. 2011B. System Protection (Subtask 23-20-59-000-015-A01) .............................. 2011C. Lubrication Practices (Subtask 23-20-59-000-016-A01) ........................... 2011D. Cleaning (Subtask 23-20-59-000-017-A01) ......................................... 201110. Diagrams (TASK 23-20-59-000-809-A01) ................................................. 2011A. RTA-50D VDR Diagrams (Subtask 23-20-59-000-018-A01) ...................... 2011EFFECTIVITYALL 23-20-59 Page TC-31 Mar 2011© Honeywell International Inc. Do not copy without express permission of Honeywell.
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MAINTENANCE MANUAL965-1696TABLE OF CONTENTS (Cont)LIST OF FIGURESFigure Description PageINTRO-1 Geometric Tolerance Symbols (GRAPHIC 23-20-59-99B-801-A01) ................ INTRO-2INTRO-2 Symbols (GRAPHIC 23-20-59-99B-802-A01) ......................................... INTRO-4INTRO-3 MTOSS Code Positions (GRAPHIC 23-20-59-99B-803-A01) ....................... INTRO-51 Typical RTA-50D VDR (GRAPHIC 23-20-59-99B-804-A01) ......................... 52 VHF Communications for Voice Operation (GRAPHIC 23-20-59-99B-805-A01) .. 103 Module and Assembly Locations (GRAPHIC 23-20-59-99B-806-A01) ............. 114 ACARS Audio Interface (GRAPHIC 23-20-59-99B-807-A01)........................ 135 RTA-50D VDR External Interfaces (ARINC 750 Mode) (GRAPHIC 23-20-59-99B-808-A01).............................................................................. 146 RTA-50D VDR Interface Context Diagram (GRAPHIC 23-20-59-99B-809-A01) .. 217 RTA-50D VDR Internal Architecture (GRAPHIC 23-20-59-99B-810-A01) .......... 278 RF CCA (GRAPHIC 23-20-59-99B-811-A01) ......................................... 319 Digital Processor CCA Block Diagram (GRAPHIC 23-20-59-99B-812-A01) ....... 391001 RTA-50D VDR Front Panel Functional Self-Test Interface (GRAPHIC 23-20-59-99B-813-A01).............................................................................. 10022001 RTA-50D VDR Detail/Interwiring Diagram (GRAPHIC 23-20-59-99B-814-A01) ... 2013EFFECTIVITYALL 23-20-59 Page TC-51 Mar 2011© Honeywell International Inc. Do not copy without express permission of Honeywell.
MAINTENANCE MANUAL965-1696TABLE OF CONTENTS (Cont)LIST OF TABLESTable Description PageINTRO-1 Page Number Blocks ..................................................................... INTRO-4INTRO-2 MTOSS Function Code Definitions ...................................................... INTRO-5INTRO-3 Verification Data ........................................................................... INTRO-201 Leading Particulars ....................................................................... 12 Equipment Required but Not Supplied .................................................. 73 RTA-50D VDR Configurations Available ................................................ 84 RTA-50D VDR Features .................................................................. 85 RTA-50D VDR Environmental Certification Categories ............................... 86 Module and Assembly Designations .................................................... 107 Modes of Operation ....................................................................... 121001 Front Panel Functional Self-Test Results ............................................... 10022001 RTA-50D VDR Communications Transceiver Connector Determinants ............. 20032002 Inspection/Check Procedures............................................................ 20092003 Initial Control Settings .................................................................... 2010EFFECTIVITYALL 23-20-59 Page TC-61 Mar 2011© Honeywell International Inc. Do not copy without express permission of Honeywell.
MAINTENANCE MANUAL965-1696INTRODUCTION1. How to Use This Manual (TASK 23-20-59-99F-801-A01)A. General (Subtask 23-20-59-99F-001-A01)(1) This publication gives maintenance instructions for the equipment shown on the Title page.(2) Standard maintenance procedures that technicians must know are not given in this manual.(3) This publication is written in agreement with the ATA Specification.(4) Warnings, cautions, and notes in this manual give the data that follows:• A WARNING gives a condition or tells personnel what part of an operation or maintenanceprocedure, which if not obeyed, can cause injury or death• A CAUTION gives a condition or tells personnel what part of an operation or maintenanceprocedure, which if not obeyed, can cause damage to the equipment• A NOTE gives data, not commands. The NOTE helps personnel when they do the relatedinstruction.(5) Warnings and cautions go before the applicable paragraph or step. Notes follow the applicableparagraph or step.B. Observance of Manual Instructions (Subtask 23-20-59-99F-002-A01)(1) The procedures used must be consistent with standard shop practices and be carefullyexamined to make sure that all safety, efficiency, and operation procedures of the unit areobeyed.(2) All personnel who operate equipment and do maintenance specified in this manual must knowand obey the safety precautions.C. Symbols (Subtask 23-20-59-99F-003-A01)(1) The symbols and special characters are in agreement with IEEE Publication 260 and IECPublication 27. Special characters in text are spelled out.(2) The signal mnemonics, unit control designators, and test designators are shown in capitalletters.(3) The signal names followed by an “*” show an active low signal.(4) Some figures in this manual incorporate standard geometric characteristic symbols. Refer toFigure INTRO-1 for the geometric characteristic symbols.EFFECTIVITYALL 23-20-59 Page INTRO-11 Mar 2011© Honeywell International Inc. Do not copy without express permission of Honeywell.
MAINTENANCE MANUAL965-1696Figure INTRO-1. (Sheet 1 of 2) Geometric Tolerance Symbols (GRAPHIC 23-20-59-99B-801-A01)EFFECTIVITYALL 23-20-59 Page INTRO-21 Mar 2011© Honeywell International Inc. Do not copy without express permission of Honeywell.
MAINTENANCE MANUAL965-1696Figure INTRO-1. (Sheet 2 of 2) Geometric Tolerance Symbols (GRAPHIC 23-20-59-99B-801-A01)EFFECTIVITYALL 23-20-59 Page INTRO-31 Mar 2011© Honeywell International Inc. Do not copy without express permission of Honeywell.
MAINTENANCE MANUAL965-1696(5) The symbols in Figure INTRO-2 show ESDS and moisture sensitive devices.Figure INTRO-2. (Sheet 1 of 1) Symbols (GRAPHIC 23-20-59-99B-802-A01)D. Units of Measure (Subtask 23-20-59-99F-004-A01)(1) Measurements, weights, temperatures, dimensions, and other values are expressed in theUSMS followed by the appropriate SI metric units in parentheses. Some standard tools orparts such as drills, taps, bolts, nuts, etc., do not have an equivalent.E. Page Number Block Explanation (Subtask 23-20-59-99F-005-A01)(1) The data in this manual is divided into sections. A standard page number block system isused. Page number blocks are shown in Table INTRO-1.TableINTRO-1. PageNumberBlocksSection Page Number BlockDescription and Operation 1thru999Fault Isolation 1001 thru 1999Maintenance Practices 2001 thru 2999F. Application of Maintenance Task Oriented Support System (MTOSS) (Subtask 23-20-59-99F-006-A01)(1) In accordance with the ATA Specification 2200, this publication uses a Maintenance TaskNumbering System which make the maintenance procedures in this manual compatible withan automated shop environment.(2) The system uses standard and unique number combinations to identify maintenance tasksand subtasks.(3) The MTOSS structure is the logical approach to organizing maintenance tasks and subtasks.The MTOSS numbering system includes the ATA Chapter-Section-Subject number as well as afunction code and unique identifiers. The purpose of incorporating the MTOSS numberingsystem is to give a means for the automated sorting, retrieval, and management of digitizeddata.(4) Section and Subsection Numbering System(a) All procedures in this publication have TASK and SUBTASK numbers at key data retrievalpoints. The numbers give the following:• Identification of the hardware (parts or parts) primary to the TASK• Identification of the maintenance function applied to the part or parts• A unique identifier for a set of instructions (known as TASK or SUBTASK)EFFECTIVITYALL 23-20-59 Page INTRO-41 Mar 2011© Honeywell International Inc. Do not copy without express permission of Honeywell.
MAINTENANCE MANUAL965-1696• Identification of alternate methods and configuration differences that change theprocedure applied to the TASK• Identification of airline changes to a TASK or SUBTASK.(5) Components of Task and Subtask Number(a) The numbering system is an expansion of the ATA three-element numbering system. Thenumber has seven elements. The first five elements are necessary for each TASK orSUBTASK. The sixth and seventh elements are applied only when necessary. Refer toFigure INTRO-3.(b) Elements 1, 2, and 3 identify the ATA Chapter-Section-Subject number of the page block.(c) Element 4 defines the maintenance function being performed. This element is a threeposition element. The third position is zero filled when further definition is not required. Ifrequired, the manufacturer will use the numbers 1 thru 9 or letters A thru Z, excluding theletters I and O. Refer to Table INTRO-2.(d) Element 5 provides a unique identification for each TASK or SUBTASK number which issimilarly numbered through the first four elements as follows:• TASKS are numbered from 801 thru 999• SUBTASKS are numbered from 001 thru 800.(e) Element 6 is a three position alphanumeric element used for identification of differencesin configurations, methods or techniques, variations of standard practice applications, etc.(f) Element 7 provides coding of those tasks or subtasks that have been changed by thecustomer (e.g., those tasks or subtasks accomplished by an outside repair source).Figure INTRO-3. (Sheet 1 of 1) MTOSS Code Positions (GRAPHIC 23-20-59-99B-803-A01)Table INTRO-2. MTOSS Function Code DefinitionsCode Function Definition000 REMOVAL AND DISASSEMBLYEFFECTIVITYALL 23-20-59 Page INTRO-51 Mar 2011© Honeywell International Inc. Do not copy without express permission of Honeywell.
MAINTENANCE MANUAL965-1696Table INTRO-2. MTOSS Function Code Definitions (Cont)Code Function Definition010 Removal Removal of the engine/component from aworkstand, transport dolly, test stand, etc., oraircraft.020 Remove Modular Sections This is the first echelon of disassembly whichhas sectionalization of the unit/engine intoprimary modular sections. Modular sectionsare identified by the third element of the ATAnumber when removed from the unit/engine.030 Disassemble Modular Sections This is the second echelon of disassemblywhich has disassembly of the modular sectionsinto subassemblies after removal from theunit/engine. Modular section designationsappear in the second element of the ATAnumber for this echelon of disassembly.040 Disassemble Subassemblies This is the third echelon of engine disassemblywhich has disassembly of subassembliesto the piece part level. The subassembliesare identified by the third element of the ATAnumber.050 Remove Accessory/Power Plant Components This has removing individual accessory/powerplant components from either installed oruninstalled engines.060 Disassemble Accessory This involves disassembly of accessories/components into subassemblies.070 Disassemble Accessory Subassembly This involves disassembly of accessories/components subassemblies into piece parts.080 Remove Test Equipment This has removing equipment andinstrumentation after accessory/componenttest.090 Disassemble Support Equipment This has disassembly of support equipmentrequired to maintain said support equipment.100 CLEANING110 Chemical Removal of surface deposits from a part byuse of a chemical cleaning agent. After beingdissolved, the deposit is washed or rinsed awayafter a soaking period. Also includes chemicalpower flushing.120 Abrasive Removal of surface deposits from a part by wetor dry particle impingement.EFFECTIVITYALL 23-20-59 Page INTRO-61 Mar 2011© Honeywell International Inc. Do not copy without express permission of Honeywell.
MAINTENANCE MANUAL965-1696Table INTRO-2. MTOSS Function Code Definitions (Cont)Code Function Definition130 Ultrasonic Removal of surface deposits and entrappedmaterial by use of high frequency sound wavesto produce cavitation at the surface of thepart. Cleaning is performed in a liquid baththat transmits the sound energy and keeps theremoved material in suspension.140 Mechanical Removal of surface deposits from a part by useof a brush, felt bob, sandpaper, or other handor mechanical action.150 Unassigned160 Miscellaneous Removal of deposits from parts withcompressed air, miscellaneous hand cleaning,and various combinations of cleaningprocedures.170 Foam/Water Wash Removal of post emulsified fluorescentpenetrant through an agitated water wash,automatic spray rinse, or an aqueous removeraeratedtoproduceafoam.180 Testing of Solutions Test used to assist in identifying certainmaterials by electro-mechanically determiningthe presence or absence of known constituents.190 Unassigned200 INSPECTION210 Check A thorough visual examination of components,accessories, subsystems, and piece partsto detect structural failure, deteriorationor damage and to determine the need forcorrective action. For example: exteriorsurfaces, electronic circuit cards, gears, controlsystems, linkages, accessories, components,tubing, wiring and connections, safety wiring,fasteners, clamps, etc., are inspected toverify correct condition and acceptability forcontinued service.EFFECTIVITYALL 23-20-59 Page INTRO-71 Mar 2011© Honeywell International Inc. Do not copy without express permission of Honeywell.
MAINTENANCE MANUAL965-1696Table INTRO-2. MTOSS Function Code Definitions (Cont)Code Function Definition220 Visual/Dimensional A comparison of the dimensions and materialconditions of parts, subassemblies, andassemblies with the specifications containedin technical manuals and/or blueprints, todetect deviations from established standardand limits and determine the acceptability forcontinued service, repair, or need to discardthe item. A visual/dimensional function code isalso required to verify that correct correctivemaintenance has been accomplished.Although some of these tasks do not requiremeasurements, a complete spectrum oftasks/sub tasks requires a variety of measuringequipment to determine runout, concentricity,flatness, parallelism, hardness, thickness,clarity, dimensions, etc.230 Penetrant Fluorescent penetrant inspection to detectsurface cracks.240 Magnetic Magnetic particle inspection to detect surfacecracks in magnetic materials.250 Eddy Current Inspection for subsurface cracks, porosity,inclusions, or other nonhomogeneousmaterial structure by use of high frequencyelectromagnetic wave equipment. Parts arescanned and compared to similar parts or testspecimens having known material defects.260 X-Ray Inspection for subsurface cracks, porosity,inclusions, or other nonhomogeneous materialstructure by use of x-ray techniques.270 Ultrasonic Inspection for subsurface cracks, porosity,inclusions, or other nonhomogeneous materialstructure by use of contact pulse echoultrasonic techniques.280 Special Any special inspection to determine theintegrity of a part for continued operationIn-Service or qualitative analysis.290 Unassigned300 REPAIREFFECTIVITYALL 23-20-59 Page INTRO-81 Mar 2011© Honeywell International Inc. Do not copy without express permission of Honeywell.
MAINTENANCE MANUAL965-1696Table INTRO-2. MTOSS Function Code Definitions (Cont)Code Function Definition310 Welding and Brazing The joining of pieces by welding (fusion,resistance, spot, electron beam, plasma arc),brazing (furnace, torch, induction), or soldering.This category includes hard facing.320 Machining The process of obtaining a desired shape orfinish by grinding, turning, boring, reaming,broaching, milling, drilling, lapping, honing,sizing, polishing, buffing, cutting, forming,stamping, blanking, etc.330 Stripping and Plating Removing or applying a metallic coating on asurface by mechanical, chemical, or electricalmeans. Plating of chromium, cadmium, tin,etc., to build up the size of a part or supplysurface protection. Includes masking or waxingbefore the process.340 Plasma and Flame Spraying The application of a protective coating to apart by feeding a powder into an ionized gasstream. Flame spraying uses a fuel oxygenflame to melt and propel metal onto parts tobuild up the size or supply surface protection.350 Miscellaneous Repairs Repairing parts by hand (cutting, drilling,polishing, grinding, lapping, riveting, blending,routing, fitting, burring, planishing, sanding,sawing, recambering, drilling, tapping,heating, chilling) and including miscellaneousdisassembly and assembly required.360 Bonding and Molding/Sealing Joining and curing of parts with an adhesive orfusible material (including silicone, fiberglass,glues).370 Heat Treating Controlled heating and cooling of a material toobtain the desired physical property (includesannealing, tempering, quenching, stressrelieving, solution heat treat, etc.).380 Surface Treating Treating the surface of a part by painting,varnishing, aluminizing, Teflon coating, zincchromate priming, tumble finishing, shotpeening, etc. Baking and masking processesare included.390 Machine Riveting and Flaring Joining of parts by riveting and flaring the rivet.400 INSTALLATION AND ASSEMBLYEFFECTIVITYALL 23-20-59 Page INTRO-91 Mar 2011© Honeywell International Inc. Do not copy without express permission of Honeywell.
MAINTENANCE MANUAL965-1696Table INTRO-2. MTOSS Function Code Definitions (Cont)Code Function Definition410 Install Installation of the unit/engine onto a workstand,transport dolly, test stand, or aircraft.420 Install Modular Sections The third echelon of assembly consisting ofassembly of the modular assemblies into acomplete unit/engine assembly. The modularsections are identified by the third element ofthe ATA number.430 Assemble Modular Sections The second echelon of assembly consistingof assembling subassemblies into modularsections. The modular section is identified bythe second element of the ATA number.440 Assemble Subassemblies The first echelon of assembly consisting ofassembling piece parts into subassemblies.The subassemblies are identified by the thirdelement of the ATA number.450 Install/Close Items Removed/Opened forAccess Installation or closing of access plates, closingof ports, installation of components, tubingor any item which was removed or opened inorder to supply access to do the task.460 Assemble Accessory Assemble accessory components.470 Assemble Accessory Subassembly Assembly of accessory subassemblycomponents.480 Install Test Equipment Install equipment and instrumentation requiredfor accessory component test.490 Assemble Support Equipment Any assembly required to maintain supportequipment.500 MATERIAL HANDLING510 Shipping The movement of any part, subassembly,assembly, or component from the time it ispackaged until it reaches its destination.520 Receiving The receipt activity for any incoming part,subassembly, assembly, or component.530 Packing Installing parts, subassemblies, assemblies, orcomponents into shipping containers.540 Unpacking Removing parts, subassemblies, assemblies,or components from shipping containers.550 Storage Safekeeping of parts, subassemblies,assemblies, or components until required foruse.EFFECTIVITYALL 23-20-59 Page INTRO-101 Mar 2011© Honeywell International Inc. Do not copy without express permission of Honeywell.
MAINTENANCE MANUAL965-1696Table INTRO-2. MTOSS Function Code Definitions (Cont)Code Function Definition560 Marshaling/Positioning Marshaling is collection of parts,subassemblies, and accessories beforerelease for assembly. Positioning is movementfrom one fixed state to another.570 Engine Ferry/Pod Maintenance Necessary preparations before and aftertransporting an engine by aircraft ferry method.580 Unassigned590 Unassigned600 SERVICING/PRESERVING/LUBRICATING610 Servicing Action required to sustain a unit or system incorrect operating status including priming withapplicable fluids before use.620 Preserving Preparation of a unit, part, assembly, etc.,for safekeeping from decomposition ordeterioration. Includes preparation for storage(applying a preservative layer, desiccants, etc.).630 Depreserving Removing preservatives, desiccants, etc., froma unit, part, assembly, etc., before installationor operation.640 Lubricating Applying oil, grease, dry film, or siliconlubricants on moving parts to decrease frictionor cool the item.650 Unassigned660 Unassigned670 Unassigned680 Unassigned690 Unassigned700 TESTING/CHECKING710 Oil Flow Measuring the flow of oil through componentsor compartments under specific conditions.720 Air Flow Measuring the flow of air through componentsor compartments under specific conditions.730 Fuel Flow Function checks and flow measurementsthrough the part or system being tested.EFFECTIVITYALL 23-20-59 Page INTRO-111 Mar 2011© Honeywell International Inc. Do not copy without express permission of Honeywell.
MAINTENANCE MANUAL965-1696Table INTRO-2. MTOSS Function Code Definitions (Cont)Code Function Definition740 Water Flow Function checks and flow measurementsthrough the part or system being tested.750 Electrical/Return to Service Functional tests (manual or ATE) of the systemor component as well as measurement ofelectrical or electronic parameters designed todetermine whether the item can be returned toservice. May include fault isolation proceduresfor components that require close correlationbetween test results and fault indications.760 Engine Operation of an engine to establish systemsfunction or operation under specific conditionsto measure performance.770 Accessory/Bite Testing of an accessory to make sure of correctoperation or function.780 Pressure Check Testing to establish the ability of a normallypressurized component or system to operatecorrectly.790 Leak Check Determine the ability of a component or systemto operate without leaking.800 MISCELLANEOUS810 Fault Isolation Operation of an engine at constant thrustlevel or identical engine pressure ratio enginepressure ratio to locate the prime suspectdeficient system operating an incorrectlyfunctioning system or component to locatethe cause; or performing a series of checks toisolate a failed part or component.820 Adjusting/Aligning/Calibrating Makingaphysicalcorrectiontomakesureofcorrect placement or operation of a system orcomponent.830 Rigging Hooking-up, arranging, or adjusting acomponent or accessory linkage for correctoperation.840 Service Bulletin Incorporation Performing the work specified in theservice bulletin. Provides for identificationof modification tasks at the task level withsubtasks recognizing any functional changes(chemical, visual/dimensional, cleaning,machining, etc.) necessary to incorporate theservice bulletin.EFFECTIVITYALL 23-20-59 Page INTRO-121 Mar 2011© Honeywell International Inc. Do not copy without express permission of Honeywell.
MAINTENANCE MANUAL965-1696Table INTRO-2. MTOSS Function Code Definitions (Cont)Code Function Definition850 Part Number Change/Re-identification Change of part number, application of partnumber by transfer, engrave repair number, etc.860 Unassigned870 Description and Operation Electrical and mechanical description of theunit or component. Includes leading particulars,descriptions, limitations, specifications, andtheory of operation.880 Approved Vendor Processes Includes processes that can be proprietary andcontrolled by a particular manufacturer, or bynonproprietary and approved for application byconforming vendors.890 Airline Maintenance Program (Customer Use)900 Unassigned910 Special Equipment Maintenance Identification of tasks to maintain specialsupport equipment.920 Standard Equipment Maintenance Identification of tasks to maintain standardsupport equipment.930 Tool Fabrication Includes fabricating any tool for whichprocedures to use are included in the manual.940 Special Tools, Equip, and Consumables Listing Listing of all special tools, standard equipment,special equipment, and consumables requiredto do maintenance on the unit or component.94A Consumables94B Special Tools/Non Std Tools94C Fixtures/Test Equipment94D Standard Tools950 Illustrated Parts List (Detailed Parts List) Section of IPL/IPC that contains partsdescription and identification in top-down breakdown sequence.960 Illustrated Parts List (Equipment DesignationIndex) Section of IPL/IPC that contains equipmentdesignators cross-referenced to detailed partslist.970 Illustrated Parts List (Numerical Index) Section of IPL/IPC that contains analphanumeric listing of all parts in the unitcross-referenced to the detailed parts list.980 Illustrated Parts List (Alternate Vendor Index) Optional section of IPL/IPC that contains analphanumeric listing of all parts in the unit thathave more than one vendor source.EFFECTIVITYALL 23-20-59 Page INTRO-131 Mar 2011© Honeywell International Inc. Do not copy without express permission of Honeywell.
MAINTENANCE MANUAL965-1696Table INTRO-2. MTOSS Function Code Definitions (Cont)Code Function Definition990 Illustrations, Tables, Front Matter, Etc.99A Tables99B Illustrations99C Front Matter Pageblock (TASK Level MTOSS)Front Matter Task (Collection of SubtaskMTOSS)99D Access99E References99F General/IntroductionG. Standard Practices Manual (Subtask 23-20-59-99F-007-A01)(1) Standard cleaning, check, repair, and assembly procedures applicable to multiple models canbe found in a standard practices manual. Refer to Paragraph 3 (TASK 23-20-59-99F-803-A01).H. Electrostatic Discharge (Subtask 23-20-59-99F-008-A01)(1) Touch the items susceptible to electrostatic discharge in accordance with MIL-HDBK-263.Refer to MIL-STD-1686 for definition of the standards and conditions.2. Customer Support (TASK 23-20-59-99F-802-A01)A. Honeywell Aerospace Online Technical Publications Web Site (Subtask 23-20-59-99F-009-A01)(1) Go to the Honeywell Online Technical Publications Web site at (www.myaerospace.com).• To download or see publications online• To order a publication• To tell Honeywell of a possible data error in a publication.B. Global Customer Care Center (Subtask 23-20-59-99F-010-A01)(1) If you do not have access to the Honeywell Technical Publications Web site, or if you need tospeak to personnel about non-Technical Publication matters, the Honeywell Aerospace GlobalCustomer Care Center gives 24/7 customer service to Air Transport & Regional, Business &General Aviation, and Defense & Space customers around the globe.• Telephone: 800-601-3099 (Toll Free U.S.A./Canada)• Telephone: 602-365-3099 (International)• Telephone: 00-800-601-30999 (EMEA Toll Free)• Telephone: 420-234-625-500 (EMEA Direct).3. References (TASK 23-20-59-99F-803-A01)A. Honeywell/Vendor Publications (Subtask 23-20-59-99F-011-A01)(1) Related Honeywell publications in this manual are shown in the list that follows:EFFECTIVITYALL 23-20-59 Page INTRO-141 Mar 2011© Honeywell International Inc. Do not copy without express permission of Honeywell.
MAINTENANCE MANUAL965-1696• ATA No. 23-20-56 (Pub. No. 012-0797-001), CMM, RTA-50D VHF Data Radio• Pub. No. A09-1100-004, Standard Repair Procedures for Honeywell Avionics EquipmentInstruction Manual.B. Other Publications (Subtask 23-20-59-99F-012-A01)(1) These publications are standard references. Check for latest version of publication.• The United States GPO Style Manual 2000 (available at http://www.gpoaccess.gov/stylemanual/browse.html)• IEEE Std 260, Standard Letter Symbols for Units of Measurement (available from theAmerican National Standards Institute, New York, NY)• ASME Y14.38, Abbreviations for Use on Drawings and in Text (available from the AmericanNational Standards Institute, New York, NY)• ANSI/IEEE Std 91, Graphic Symbols for Logic Functions (available from the AmericanNational Standards Institute, New York, NY)• H4/H8 CAGE Codes (available at http://www.dlis.dla.mil/cage_welcome.asp)• IEEE 315/ANSI Y32.2, Graphic Symbols for Electrical and Electronics Diagrams (availablefrom the American National Standards Institute, New York, NY)• MIL-HDBK-263, Electrostatic Discharge Control Handbook for Protection of Electrical andElectronic Parts, Assemblies and Equipment (Excluding Electrically Initiated ExplosiveDevices) (Metric) (available from any military standards database)• MIL-STD-1686, Electrostatic Discharge Control Program for Protection of Electrical andElectronic Parts, Assemblies and Equipment (Excluding Electrically Initiated ExplosiveDevices) (Metric) (available from any military standards database).4. Acronyms and Abbreviations (TASK 23-20-59-99F-804-A01)A. General (Subtask 23-20-59-99F-013-A01)(1) The abbreviations are used in agreement with ASME Y14.38.(2) Acronyms and non-standard abbreviations used in this publication are as follows.List of Acronyms and AbbreviationsTerm Full TermA/D analog-to-digitalACARS airborne communications addressing and reporting systemACR aircraft communications routerADC analog-to-digital converterADS-B automatic dependent surveillance broadcastAGC automatic gain controlALC automatic level controlAM amplitude modulationAMM aircraft maintenance manualAMP ampereANSI American National Standards InstituteEFFECTIVITYALL 23-20-59 Page INTRO-151 Mar 2011© Honeywell International Inc. Do not copy without express permission of Honeywell.
MAINTENANCE MANUAL965-1696List of Acronyms and Abbreviations (Cont)Term Full TermAOA airborne communications addressing and reporting system overaviation very-high frequency link controlAOC airline operational communicationsARINC Aeronautical Radio, IncorporatedASCII American Standard Code for Information InterchangeASME American Society of Mechanical EngineersATA Air Transport AssociationATC air traffic controlATE automated test equipmentATN aeronautical telecommunication networkATR Air Transport RadioATSU air traffic services unitBIT built-in testBITE built-in test equipmentBOP bit oriented protocolCCA circuit card assemblyCFDS central fault display systemCMC central maintenance computerCMM component maintenance manualCMU communications management unitCODEC coder-decoderCPDLC controller pilot data link communicationCSMA carrier sense multiple accessD/A digital-to-analogDC direct currentDDC digital down converterDSB-AM double side band-amplitude modulationDSP digital signal processorDUC digital up converterECC error correction controlECCN export control classification numberEEPROM electronically erasable programmable read only memoryEMEA Europe, the Middle East, and AfricaESDS electrostatic discharge sensitiveEFFECTIVITYALL 23-20-59 Page INTRO-161 Mar 2011© Honeywell International Inc. Do not copy without express permission of Honeywell.
MAINTENANCE MANUAL965-1696List of Acronyms and Abbreviations (Cont)Term Full TermEUROCAE Equipment and European Organization for Civil Aviation EquipmentFANS future air navigation systemFM frequency moduleFPGA field-programmable gate arrayGPO Government Printing OfficeGPS global positioning systemHIRF high-intensity radiated fieldHPI host port interfaceHz hertzI/O input/outputICAO International Civil Aviation OrganizationID identificationIEC International Electrotechnical CommissionIEEE Institute of Electrical and Electronics EngineersIF intermediate frequencyIPC illustrated parts catalogIPL illustrated parts listKbit kilobitKbps kilobyte per secondLED light-emitting diodeLNA low noise amplifierLO local oscillatorLRU line-replaceable unitMAX maximumMCBSP multichannel buffered serial portMCU micro-controller unitMHz megahertzMIC microphoneMIN minimumMM maintenance manualMOPS minimum operational performance standardMSK minimum shift keyingMTOSS maintenance task oriented support systemMU management unitEFFECTIVITYALL 23-20-59 Page INTRO-171 Mar 2011© Honeywell International Inc. Do not copy without express permission of Honeywell.
MAINTENANCE MANUAL965-1696List of Acronyms and Abbreviations (Cont)Term Full TermMUX multiplexorMbit megabitNA not applicableNLR no license requiredNo. numberOEM original equipment manufacturerOMS on-board maintenance systemPA power amplifierPC personal computerPCI peripheral component interconnectPLL phase-locked loopPN part numberPOA plain old airborne communications addressing and reporting systemPPM parts per millionPS power supplyPTT push-to-talkPub. publicationRAM random access memoryRF radio frequencyRTCA Radio Technical Commission for AeronauticsRTP radio tuning panelRx receiveSAW surface acoustical waveSDI source/destination identifierSDRAM synchronous dynamic random access memorySELCAL selective callingSEU single event upsetSI International System of UnitsSINAD signal noise and distortionSNR signal-to-noise ratioSPI serial peripheral interfaceSTDMA self-organizing time division multiple accessTCXO temperature-controlled crystal oscillatorTDMA time division multiple accessEFFECTIVITYALL 23-20-59 Page INTRO-181 Mar 2011© Honeywell International Inc. Do not copy without express permission of Honeywell.
MAINTENANCE MANUAL965-1696List of Acronyms and Abbreviations (Cont)Term Full TermTR temporary revisionTx transmitUSMS United States Measurement SystemUTC universal time coordinatedVCO voltage-controlled oscillatorVDC volt, direct currentVDL very-high frequency data linkVDR very-high frequency data radioVHF very-high frequencyVSWR voltage standing wave ratioVrms volt, root mean squarebps bytes per seconddB decibeldBm decibel (referenced to one milliwatt)kHz kilohertzkbps kilobyte per secondkg kilogrammW milliwattmm millimeterms millisecond5. Process Verification (TASK 23-20-59-99F-805-A01)A. Verification Data (Subtask 23-20-59-99F-014-A01)(1) Honeywell does a verification of these technical instructions by performance or by simulationof the necessary procedures. Performance shows that the procedures were checked by theuse of the manual. Simulation shows that the applicable personnel looked at the procedurein the manual and that the procedure is technically correct. The dates of verification forthis manual are given in Table INTRO-3.EFFECTIVITYALL 23-20-59 Page INTRO-191 Mar 2011© Honeywell International Inc. Do not copy without express permission of Honeywell.
MAINTENANCE MANUAL965-1696Table INTRO-3. Verification DataSection Method DateFault Isolation 1Performance 11 Feb 2011NOTE:1Only the TESTING portion of the FAULT ISOLATION section was done by performance.EFFECTIVITYALL 23-20-59 Page INTRO-201 Mar 2011© Honeywell International Inc. Do not copy without express permission of Honeywell.
MAINTENANCE MANUAL965-1696DESCRIPTION AND OPERATION1. Description (TASK 23-20-59-870-801-A01)A. General (Subtask 23-20-59-870-001-A01)(1) This section contains a description of the RTA-50D VDR and lists other components requiredfor system operation.(2) Refer to Table 1 for the leading particulars.Table 1. Leading ParticularsCharacteristic SpecificationWeight 9.0 pounds (4.1 kg)Length 12.72 to 12.80 inches (323.1 to 325.1 mm)Width 3.58 inches (90.9 mm)Height 7.88 inches (200 mm)Power:• Receive 20 to 32 VDC 1.5 AMP MAX• Transmit 8.0 AMP MAXFrequency range 118.000 to 136.975 MHzFrequency control Dual ARINC 429 (serial digital) low-speed (13 kbps)inputsChannel spacing:•Allmodes 25 kHz• DSB-AM voice only 8.33 kHzCooling Forced air in accordance with ARINC Specification600Transmitter (DSB-AM voice and data)Output power 25 watts (nominal)Output impedance 50 ohmFrequency stability ±0.0005%Voice modulation level 90% MIN modulation for an input level of 0.25 Vrmsat 1,000 HzVoice audio distortion 6% MAX for 30% modulation and 10% MAX for 90%modulation with a 0.5-volt input and a modulatingfrequency from 300 to 2,500 HzVoice audio frequency response Flat within 6 dB from 300 to 2,500 HzSpurious radiation 118 dB MIN below desired carrier levelHarmonic radiation 60 dB MIN below desired carrier levelEFFECTIVITYALL 23-20-59 Page 11 Mar 2011© Honeywell International Inc. Do not copy without express permission of Honeywell.
MAINTENANCE MANUAL965-1696Table 1. Leading Particulars (Cont)Characteristic SpecificationMode 0 data modulation level 70% modulation MIN for a frequency of 1,000 Hz at10 dBm levelMode 0 data input frequency response Flat within 5.5 dB from 600 to 6,600 HzMode 0 data input distortion 9.5% MAX for up to 90% modulation from 600 to6,600 HzReceiver (DSB-AM voice and data)Sensitivity Greater than 6 dB SINAD for 107 dBm signalmodulated 30% at 1,000 HzInput Impedance 50 ohmFrequency stability ±0.0005%Selectivity:• 8.33-kHz channel spacing at 6-dB bandwidth ±2.78 kHz• 8.33-kHz channel spacing at 60-dB bandwidth ±7.365 kHz• 25-kHz channel spacing at 6-dB bandwidth ±8 kHz• 25-kHz channel spacing at 60-dB bandwidth ±17 kHzCross modulation Meets requirements of ARINC Characteristic 716,Section 3.6.4Intermodulation Meets ICAO Annex 10, RTCA DO-186B, ED-23BAGC Audio output will vary not more than 3 dB with inputsof 5 to 100,000 microvolts and not more than 6 dBto 500 millivoltsAudio output 40 mW MIN into a 600 ohm ±20% resistive loadAudio distortion Total harmonic distortion will not exceed 5% with a1,000-microvolt input signal modulated 30% at 1,000HzAudio frequency response Within6dBfrom300to2,500HzAudio output regulation: From a 10-mW reference level into 600 ohms• Resistive load variations between 450 to 2,400ohmsLess than 2-dB voltage change•Resistive load variations between 200 to 20,000ohmsNo more than 6 dB voltage changeUndesired responses 80 dB MINSELCAL/data output 0.6 Vrms MIN with a 2-microvolt signal modulated30% at 1,000 Hz into a 600-ohm loadEFFECTIVITYALL 23-20-59 Page 21 Mar 2011© Honeywell International Inc. Do not copy without express permission of Honeywell.
MAINTENANCE MANUAL965-1696Table 1. Leading Particulars (Cont)Characteristic SpecificationSELCAL/data response ±2.5 dB from 312 to 1,200 Hz (post-detectionresponse with respect to 1,000 Hz is ±4.5 dB from300to6,600Hz)SELCAL/data distortion 4.5% MAX for a 1,000-microvolt input modulated30% at 1,000 Hz producing 0.5 Vrms into 600 ohmsPhase shift Audio output does not depart from that of thepositive-going modulation envelope at the receiverinput by more than 30 to +120 degrees with a1,000-microvolt input signal modulated 30% at 1,000HzTransmitter (Mode 2 data)Output power 17.5 watts (nominal)Frequency stability ±0.0005%Modulation D8PSK at 31.5 kilobits/secondError vector magnitude (distortion) 6% MAXAdjacent channel emissions Less than 18 dBm in 16 kHz centered ±25 kHzaway from the transmit frequencyLess than 28 dBm in 25 kHz centered ±50 kHzaway from the transmit frequencyLess than 38 dBm in 25 kHz centered ±100 kHzaway from the transmit frequencyLess than 48 dBm in 25 kHz centered ±400 kHzaway from the transmit frequencyLess than 53 dBm in 25 kHz centered ±800 kHz orgreater away from the transmit frequencySpurious emissions Meets requirements of RTCA DO-281A andEUROCAE ED-92AHarmonic spurious emissions Meets requirements of RTCA DO-281A andEUROCAE ED-92AMode 2 data input physical interface ARINC 429 high-speed busMode 2 data input protocol In accordance with ARINC 750-3, Attachment 10Receiver (Mode 2 data)Sensitivity Less than 0.001 uncorrected bit error rate for 98dBm received signalFrequency stability ±0.005%Selectivity (25-kHz channel) Less than 44-dB adjacent channel rejectionInterference rejection Meets requirements of RTCA DO-281A andEUROCAE ED-92AEFFECTIVITYALL 23-20-59 Page 31 Mar 2011© Honeywell International Inc. Do not copy without express permission of Honeywell.
MAINTENANCE MANUAL965-1696Table 1. Leading Particulars (Cont)Characteristic SpecificationIntermodulation performance Meets requirements of RTCA DO-281A andEUROCAE ED-92AMode 2 data output physical interface ARINC 429 high-speed busMode 2 data output protocol In accordance with ARINC 750-3, Attachment 10Tuning time 100 ms MAX(3) Refer to Figure 1 for a typical RTA-50D VDR.EFFECTIVITYALL 23-20-59 Page 41 Mar 2011© Honeywell International Inc. Do not copy without express permission of Honeywell.
MAINTENANCE MANUAL965-1696Figure 1. (Sheet 1 of 1) Typical RTA-50D VDR (GRAPHIC 23-20-59-99B-804-A01)B. Job Setup Data (Subtask 23-20-59-99C-001-A01)(1) The list that follows identifies Honeywell publications that are related to this section:• Not applicable.EFFECTIVITYALL 23-20-59 Page 51 Mar 2011© Honeywell International Inc. Do not copy without express permission of Honeywell.
MAINTENANCE MANUAL965-1696C. Purpose of Equipment (Subtask 23-20-59-870-002-A01)(1) The RTA-50D VDR system is an airborne VHF communications transceiver that provides voiceand data communication between on-board aircraft systems, other aircraft systems, andground-based systems. It can operate in analog DSB-AM analog voice mode, VHF ACARSdata modes (Mode A and Mode 0), and VDL Mode 2 data mode. It also provides future supportfor VDL Mode 3 digital voice and data modes.(2) The RTA-50D VDR agrees with the standards and specifications for VHF radios that operate inthe 118 to 137-MHz band as follows:• ARINC 716-11 airborne VHF communications transceiver• ARINC 750-4 airborne VHF data radio• EUROCAE ED-23B minimum performance specification for airborne VHF communicationsequipment operating in the frequency range 117,975 to 137,000 MHz• EUROCAE ED-92A MOPS for airborne VDL Mode 2 transceiver operating in the frequencyrange 118-136.975 MHz• RTCA DO-186B MOPS for airborne radio communications equipment operating within theradio frequency range 117.975 to 137.000 MHz• RTCA DO-207 MOPS for devices that prevent blocked channels used in two-way radiocommunications due to unintentional transmissions• RTCA DO-281A MOPS for aircraft VDL Mode 2 transceiver physical, link and network layer.(3) The RTA-50D VDR operates as a voice transceiver that agrees with the voice mode definedin ARINC Characteristic 716 when operated as a 716 voice radio. Microphone audio andPTT audio are inputs and side-tone audio is output. The RF signal is double sideband AM.Frequency and channel bandwidth selection is made through a low-speed ARINC 429 businput interface to an RTP.(4) The RTA-50D VDR operates as a transceiver when used as a 716 data radio. In this mode, itagrees with the external data modem interface defined in ARINC Characteristic 716. The datamodem audio input, data key-line input, and data modem audio output interface to an ACARSMU. The ACARS data modem audio input and output are 2,400-bps MSK modulated signals.The RF signal is a double sideband AM-MSK signal. Channel frequency selection is madethrough a second low-speed ARINC 429 bus input interface to the ACARS MU.(5) The data modem audio output can be wired to a SELCAL decoder when the radio is not wiredto support 716 data mode operation. In ARINC 750 Data Mode A, the RTA-50D VDR provides2,400-bps MSK modem functionality within the radio with ARINC 429 digital data input/outputinterfaces to a CMU as defined in ARINC Characteristic 750. The command and data transferprotocol between the VDR and CMU uses the ARINC 429 Williamsburg BOP Version 1 orVersion 3. The RF signal is a double sideband AM-MSK signal. Channel frequency selection ismade through the ARINC 429 interface to the CMU.(6) When operated in Mode 2, the VDR supplies Mode 2 functionality defined in ARINCCharacteristic 750 and a 31,500-bps D8PSK modem functional internal to the radio. The Mode2 radio uses ARINC 429 digital data input/output interfaces to a CMU as specified in ARINCCharacteristic 750. The command and data transfer protocol between the VDR and CMU usesthe ARINC 429 Williamsburg BOP Version 3. The RF signal is a D8PSK-modulated RF carrier.Channel frequency selection is made through the ARINC 429 interface to the CMU.EFFECTIVITYALL 23-20-59 Page 61 Mar 2011© Honeywell International Inc. Do not copy without express permission of Honeywell.
MAINTENANCE MANUAL965-1696(7) The RTA-50D VDR system requires an antenna for its RF inputs and outputs, a control head orradio management panel, an audio input source and output sink for its analog voice functions,and an ACARS MU or a CMU for its digital control and data functions. The VDR system canalso be connected to a CMC to transfer maintenance data. To give future support for VDLMode 3 data and enhanced voice features, the RTA-50D VDR requires interface to two sourcesof aircraft ICAO address such as Mode S transponder Number 1 and Number 2.(8) When operated in voice mode, the RTA-50D VDR supplies both 25-kHz and 8.33-kHz channelspacing to meet European airspace requirements. The unit is fully interchangeable witholder ARINC 716 communications equipment for backward compatibility. Older equipmentincludes the former Allied Signal or Bendix RTA-44A, RTA-44D, and RTA-83B VHF radios,and Collins VHF 700 and VHF 700A radios.D. Equipment Required but Not Supplied (Subtask 23-20-59-870-003-A01)(1) Table 2 lists the equipment required for the RTA-50D VDR system that is not suppliedby Honeywell.Table 2. Equipment Required but Not SuppliedEquipment DescriptionPower source: DC power supply of 27.5 volts• Receive 1.5 AMP• Transmit 8AMPAudio distribution system Audio system with an input impedance of 200 to 10,000 ohmsControl panel Provides remote control of frequency selection for 25-kHz or 8.33-kHzchannel spacing system operation (serial digital ARINC 429-7 andARINC 716 Supplement 8), power on/off, volume, and squelch control inaccordance with ARINC 716MU/CMU/ATSU Provides control and data source/sink when operating in the 750 data modeMount Provides a means of mounting RTA-50D VDR in the aircraftVHF antenna Capable of receiving and transmitting VHF signals over a frequency rangeof 118.000 to 136.975 MHz.Microphone 150-ohm impedance microphone (either carbon or transistor) operatingfrom approximately 16-volt power supplyCables and connectors Necessary connectors and cables2. Configurations Available (TASK 23-20-59-870-802-A01)A. General (Subtask 23-20-59-870-004-A01)(1) Table 3 lists the available configurations of the RTA-50D VDR and the features contained ineach configuration. Table 4 contains a brief description of each feature.EFFECTIVITYALL 23-20-59 Page 71 Mar 2011© Honeywell International Inc. Do not copy without express permission of Honeywell.
MAINTENANCE MANUAL965-1696Table 3. RTA-50D VDR Configurations AvailablePN8.33-kHzChannelSpacing ACARS Mode A Mode 2AirbusCFDS/CMC BoeingCMC965-1696-021X X X X X965-1696-051 X X X X XTable 4. RTA-50D VDR FeaturesDescription118.000 to 136.975 MHz operation8.33-kHz and 25-kHz channel spacingICAO Annex 10 FM immunityACARS MSK (Mode A) data link functionVDL Mode 2 (D8PSK) data link functionGrowth function to VDL Mode 3 digital voice and data transmissionGrowth function to single-channel VDL Mode 4 data for data link communications applications onlyDual ARINC 429 tuning interfacesCMC/CFDS maintenance system interface200-ms power interrupt transparencyDO-160E environmental test compliantHIRF protectionLightning protection (Level 3)35-second stuck mike protection and protection disable circuitryRS-232 PC maintenance portB. Environmental Certification (Subtask 23-20-59-870-005-A01)(1) The RTA-50D VDR communications transceiver meets the environmental conditionsof the RTCA DO-160E, Environmental Conditions and Test Procedures forAirline Electronic/Electronical Equipment and Instruments. The environmentalcertification categories of the RTA-50D VDR, PN 965-1696-021 and -051, are[(A2)(D2)Z]BAE[RB1]XXXXXXZAAZ[CC][RR]M[ZZZZZ]XXA. Refer to Table 5.Table 5. RTA-50D VDR Environmental Certification CategoriesTest PN 965-1696-021 PN 965-1696-051Temperature and altitude A2D2 A2D2In-flight loss of cooling Z (18 hours) Z (18 hours)Temperature variation B BHumidity A AEFFECTIVITYALL 23-20-59 Page 81 Mar 2011© Honeywell International Inc. Do not copy without express permission of Honeywell.
MAINTENANCE MANUAL965-1696Table 5. RTA-50D VDR Environmental Certification Categories (Cont)Test PN 965-1696-021 PN 965-1696-051Operational shocks and crash safety E EVibration RB1 RB1Explosion proofness X XWaterproofness X XFluids and susceptibility X XSand and dust X XFungus resistance X XSalt spray X XMagnetic effect Z ZPower input A AVoltage spike A AAudio frequency conducted susceptibility - Power inputs Z ZInduced signal susceptibility CC CCRadio frequency susceptibility (radiated and conducted) RR RREmission of radio frequency energy M MLightning induced transient susceptibility ZZZZZ ZZZZZLightning direct effects X XIcing X XElectrostatic discharge A A3. System Description (TASK 23-20-59-870-803-A01)A. RTA-50D VDR Data Radio System (Subtask 23-20-59-870-006-A01)(1) The items that follow are necessary for the RTA-50D VDR:• An antenna for RF input and output• A control head or radio management panel for voice/data mode and voice channel selection• An audio input source and output destination for voice functions, and/or a data link inputsource and output destination for data link functions.(2) The RTA-50D VDR can also transfer maintenance data to an on-board maintenance system.(3) Three VHF radios are necessary for typical commercial air transport aircraft installations. Tworadios are for voice communications. The third radio is for data communications and for voicecommunications when the other radios do not work. Refer to Figure 2.EFFECTIVITYALL 23-20-59 Page 91 Mar 2011© Honeywell International Inc. Do not copy without express permission of Honeywell.
MAINTENANCE MANUAL965-1696Figure 2. (Sheet 1 of 1) VHF Communications for Voice Operation (GRAPHIC 23-20-59-99B-805-A01)B. Description of Equipment (Subtask 23-20-59-870-007-A01)(1) Refer to Table 6 for a list of all modules and assemblies in the unit. Refer to Figure 3 for thelocation of the modules and assemblies.Table 6. Module and Assembly DesignationsPN Module/Assembly700-1768-002 Rear interconnect assembly700-1782-001 Main processor assembly700-1854-001 Front panel assembly710-0361-001 Power supply assembly722-4444-006 RF transceiver module722-4445-006 Main processor moduleEFFECTIVITYALL 23-20-59 Page 101 Mar 2011© Honeywell International Inc. Do not copy without express permission of Honeywell.
MAINTENANCE MANUAL965-1696Table 6. Module and Assembly Designations (Cont)PN Module/Assembly722-4446-002 Front panel module722-4576-003 DC to DC converter722-4577-005 Power supply output module722-4600-004 Rear interconnect module722-4767-001 Power supply input module727-0008-001 RF transceiver assembly965-1696-051 Final assemblyFigure 3. (Sheet 1 of 1) Module and Assembly Locations (GRAPHIC 23-20-59-99B-806-A01)(2) Electrical Description(a) The RTA-50D VDR provides high-speed data link communications as well as voice anddata modes. The RTA-50D VDR can provide for future Mode 3 operation which requiresdigital voice and data transmission at the same time, or Mode 4 data link only.(b) When in voice mode, the RTA-50D VDR provides both 25-kHz and 8.33-kHz channelspacing to meet European airspace requirements. The unit can be interchangedwith older ARINC 716 communications equipment such as the former AlliedSignal orBendix RTA-44A, RTA-44D, and RTA-83B VHF radios, and Collins VHF 700 and VHF700A radios.EFFECTIVITYALL 23-20-59 Page 111 Mar 2011© Honeywell International Inc. Do not copy without express permission of Honeywell.
MAINTENANCE MANUAL965-1696(c) To provide high-speed data link communications, the RTA-50D VDR also operates inVDL Modes A and 2, and can provide future VDL Mode 3 digital voice and data, andsingle-channel VDL Mode 4 data services.(d) Refer to Table 7 for the modes of operation supported by the RTA-50D VDR.Table 7. Modes of OperationMode ModulationScheme ChannelSpacing AccessScheme Data Rate(bits/sec) User TrafficType InterfaceVoice DSB-AM 25/8.33 kHz PTT NA Voice audio Analog audioMode 0 data DSB-AMMSK 25 kHz CSMA 2,400 ACARS(POA) Analog audioMode A data DSB-AMMSK 25 kHz CSMA 2,400 ACARS(POA) A429Mode 2 data D8PSK 25 kHz CSMA 31,500 SimultaneousACARS andATN dataA429Mode3voiceand data 1D8PSK 25 kHz TDMA 31,500 SimultaneousACARS andATN dataAnalog audioand A429Mode4data12 GFSK 25 kHz TDMA 19,200 ATN data A429NOTES:1Requires software upgrade.2May also require hardware modifications.C. ARINC 716 Data Mode (Subtask 23-20-59-870-008-A01)(1) In ACARS, the VDR system is a simple transceiver with an analog interface to the ACARS MU.RefertoFigure4.EFFECTIVITYALL 23-20-59 Page 121 Mar 2011© Honeywell International Inc. Do not copy without express permission of Honeywell.
MAINTENANCE MANUAL965-1696Figure 4. (Sheet 1 of 1) ACARS Audio Interface (GRAPHIC 23-20-59-99B-807-A01)D. ARINC750ModeAandMode2 (Subtask 23-20-59-870-009-A01)(1) Figure 5 illustrates the same interfaces when the radio is operating in ARINC 750 Mode with acompatible CMU, ACARS MU, or ATSU. This wiring configuration would be used for ModeA and Mode 2 operation. The Mode A and Mode 2 VDR can be installed in an ARINC 716configuration if Mode A and Mode 2 operation is not required.EFFECTIVITYALL 23-20-59 Page 131 Mar 2011© Honeywell International Inc. Do not copy without express permission of Honeywell.
MAINTENANCE MANUAL965-1696Figure 5. (Sheet 1 of 1) RTA-50D VDR External Interfaces (ARINC 750 Mode) (GRAPHIC 23-20-59-99B-808-A01)4. System Component Description (TASK 23-20-59-870-804-A01)A. RTA-50D VDR (Subtask 23-20-59-870-010-A01)(1) The VDR is a VHF transmitter-receiver that provides modulation for double-sideband amplitudemodulation for analog voice/data operation in the 25-kHz or 8.33-kHz spaced channels of the118.000 to 136.975 MHz. Frequency is provided through a serial-digital format in accordancewith ARINC Specification 429.(2) The VDR is completely solid-state and is housed in a 3MCU case in accordance with ARINCCharacteristic 600. A handle is located on the front panel of the VDR to facilitate installation,removal, and transport of the VDR.EFFECTIVITYALL 23-20-59 Page 141 Mar 2011© Honeywell International Inc. Do not copy without express permission of Honeywell.
MAINTENANCE MANUAL965-1696(3) The VDR uses a low insertion force, Size 1 shell ARINC 600 rear panel connector with twoinserts. The middle insert is used for aircraft interconnections and the bottom insert is used forinput power and coaxial antenna connectors. The keying pins are set to index pin code 04.(4) Forced air cooling, in accordance with ARINC Specification 600, is required for cooling theVDR.(5) Three front panel LEDs provides visual indication of real-time BITE status as follows:• Internal fault status monitoring• External controller status• External antenna status.(6) One front panel push-button switch allows activation of manual self-test.(7) The VDR is partitioned into five subassemblies as follows:• Front panel module• Main processor module• Power supply module• Rear interconnect module• RF module.B. Other Components in the System (Subtask 23-20-59-870-011-A01)(1) Other VDR system components are not supplied by Honeywell. Information on these unitsmust be obtained from their respective manufacturers.5. Operation (TASK 23-20-59-870-805-A01)A. Voice Mode (Subtask 23-20-59-870-012-A01)(1) In voice mode, the RTA-50D VDR supports simplex PTT communications in any of the760 channels with 25-kHz spacing or 2,280 channels with 8.33-kHz spacing in the 118to 136.975-MHz range.(2) DSB-AM is used for voice communications where the voice audio from the microphonemodulates the VHF carrier frequency. The spectrum required for this type of modulation is lessthan 7 kHz. When operating in a 25-kHz channel, the excess bandwidth of the channel is usedas a guard band to reduce emissions into adjacent channels.(3) Voice channel selection is controlled from the flight deck by a radio tuning panel. In installationswhere a radio can be used in either voice or data mode, voice and data can be set from theflight deck by the radio tuning panel.B. Mode 0 Data (Subtask 23-20-59-870-013-A01)(1) Mode 0 and Mode A support data link communications that use protocols now called POA.POA uses ASCII character-oriented message formats and protocols to ensure end-to-enderror-free delivery of messages. The difference between these two modes is the interface tothe source and destination of the POA messages.(2) Mode 0 connects to a legacy ARINC 724 or 724B ACARS MU or CMU through an analogaudio interface. Data is transmitted between the MU/CMU and VDR units at a rate of 2,400 bitseach second by MSK modulated audio signals. The MSK audio modem is in the MU or CMU.The MSK audio signal produced by the modem is a 1,200 or 2,400-Hz tone that indicates if thepolarity of the transmitted data bit is the same as the previous bit or is different.EFFECTIVITYALL 23-20-59 Page 151 Mar 2011© Honeywell International Inc. Do not copy without express permission of Honeywell.
MAINTENANCE MANUAL965-1696(3) The 1,200 or 2,400-Hz tones sent by the MU or CMU modulate the amplitude of the VHFcarrier generated by the VDR. This modulated signal is a DSB-AM signal whose amplitude ismodulated at 2,400 bps. The MU/CMU controls the access to the channel and initiates thetransmission of a message by a data key line discrete input to the VDR. The MU/CMU alsocontrols the data link channel selection through one of the low-speed (13 Kbps) ARINC 429tuning inputs. Mode 0 operation is backward compatible with legacy ARINC 716 radios.C. Mode A Data (Subtask 23-20-59-870-014-A01)(1) Mode A allows the RTA-50D VDR to exchange downlink and uplink POA data messages withan Airbus ATSU or an ARINC 758 CMU through a transmit/receive pair of 100 Kbps ARINC429 digital interfaces instead of the analog audio interfaces used by Mode 0.(2) The downlink message data bits transferred to the VDR modulate the RF carrier at a rate of2,400 bps using the same DSB-AM MSK modulation scheme used in Mode 0. The differenceis that the MSK modem functionality resides in the RTA-50D VDR.(3) The VDR also controls when to access the channel to transmit data. The channel accessprotocol is the same CSMA employed by the MU/CMU in Mode 0 operation. The data linkchannel selection is still controlled by the ATSU/CMU, but channel selection messages areexchanged through the same high-speed ARINC 429 interface used to exchange POAmessages which simplifies wiring.D. VDL Mode 2 (Subtask 23-20-59-870-015-A01)(1) The newest VHF data link communication mode is VDL Mode 2. VDL Mode 2 is the termused to describe a suite of air/ground protocols that increases the data rate of the air/groundlink to 31,500 bps.(2) VDL Mode 2 allows the transition from character-oriented ACARS protocols for end-to-enddelivery of messages to one that uses bit-oriented ATN protocols using the same VHF groundand aircraft radios. The RTA-50D VDR Mode 2 capability supports the transmission andreception of standard ACARS messages such as those generated by FANS A and FANS 1applications using a protocol referred to as AOA.(3) The RTA-50D VDR Mode 2 capability also supports the transmission and reception ofbit-oriented ATN application messages such as CPDLC. The delivery of FANS A over AOAand CPDLC over ATN/VDL Mode 2 is supported concurrently. The set of VDL Mode 2protocols consist of the physical layer protocol, channel access protocol, data link service andmanagement protocol, and Mode 2 network access protocol. The physical layer protocolincludes the modulation, data rate, and forward error correction techniques used to transmitdata over the air/ground link.(4) The channel access protocol is the method that allows multiple aircraft to communicatewith the ground stations on the same frequency. The data link service and managementprotocol includes procedures to establish, maintain and hand-off an air/ground link, and ensureerror-free delivery of messages. The network access protocol is the interface between usersand the Mode 2 air/ground link service providers. As in Mode A, only the physical layer andchannel access protocols are performed by the RTA-50D VDR while the data link service andmanagement, and the network access protocols are performed by the CMU.(5) The VDL Mode 2 physical layer protocol employs a bit transmission rate of 31,500 bps overthe air/ground link on a single 25-kHz channel. The increased utilization of the 25-kHzchannel is achieved by use of a bandwidth modulation scheme known as D8PSK. A D8PSKtransmitter transmits a carrier whose phase is modulated by the data. The phase can be 0, 45,90, 135, 180, 225, 270, or 315 degrees. The rate at which the carrier phase is changed isthe modulation rate.EFFECTIVITYALL 23-20-59 Page 161 Mar 2011© Honeywell International Inc. Do not copy without express permission of Honeywell.
MAINTENANCE MANUAL965-1696(6) The phase difference or D8PSK symbol between successive phase changes can be equalto 0, 45, 90, 135, 180, 225, 270, or 315 degrees. Since there are eight possible phasedifferences, each phase change (D8PSK symbol) represents three bits of information: 000,001, 011, 010, 110, 111, 101, or 100.(7) For example, if the phase changes at a 10.5-kHz rate, the bit transmission rate is equal to 31.5Kbps. The VDL Mode 2 D8PSK modulator uses the bits in the message, three at a time, toselect the carrier phase change at a rate of 10,500 D8PSK symbols each second. A 10.5-kHzD8PSK phase modulation rate corresponds to a D8PSK bit transmission rate of 31.5 Kbps.(8) The VDL Mode 2 channel access protocol is CSMA modified to let all terminals to haveequal chances to access the channel when multiple terminals have data to transmit. Theability to optimize the CSMA protocol is included in the VDL Mode 2 channel access protocolspecification.(9) As in Mode A, the Mode 2 data link channel selection is controlled by the ATSU/CMU throughthe same high-speed ARINC 429 interface used to exchange downlink and uplink AOA orATN messages. The ATSU/CMU also dynamically controls the switching between ModeA and Mode 2 operation subject to available coverage. Since the VDL Mode 2 data rateand modulation scheme differ from those used in Mode A, separate VHF frequencies andground-based VHF equipment must be used to give POA and AOA/ATN service coverage. As aresult, the availability of high-speed AOA service depends on the availability of ground stations.E. VDL Mode 3 (Subtask 23-20-59-870-016-A01)(1) VDL Mode 2 is a data link protocol that has been optimized for efficient delivery of as muchdata traffic as possible within a 25-kHz channel assignment and with radio transmitters limitedto 15 watts output power. It requires dedicated 25-kHz channel assignments. However, thereis also a need to increase the number of VHF channels available in the 118 to 137-MHzband. To provide for additional voice and data channels, the FAA is developing a VHF digitaltransmission mode known as VDL Mode 3.(2) The RTA-50D VDR has been designed to support VDL Mode 3 voice and data operationthrough a software upgrade. Although VDL Mode 3 functionality is not available in the currentFAA ground stations, a prototype software upgrade to the RTA-50D VDR has proven thefunctionality with FAA VDL Mode 3 test ground stations.(3) VDL Mode 3 takes a 25-kHz frequency assignment and breaks it up into 120-ms frames withfour time slots of 30-ms duration each. Each time slot is a different channel. Each channel(frequency and time slot) can be assigned for use by a different ATC sector. The selection ofwhich VDL Mode 3 frequency and time slot to use is initially performed by the Pilot using aradio control panel in the same way 25-kHz or 8.33-kHz channel selection is now performed.Frequency division into time slots (channels) and the assigned use of the channels (slots) todifferentsectorsiscalledTDMA.Theslotscanbeusedtotransmitpacketsofdigitizedvoiceordata sized to fit in the appropriate time slot.(4) VDL Mode 3 uses TDMA to allow access to multiple voice and data users on the same 25-kHzfrequency assignment. VDL Mode 3 ground stations can be configured to support differentcombinations of voice and data services.(5) VDL Mode 3 ground stations can be configured so that each of the four time slots is assignedto voice traffic only (4V configuration). Slot use can be assigned to a different sector. When anaircraft enters a sector that has been assigned a particular frequency and time slot (channel),the Pilot can select the appropriate channel on the radio control panel.EFFECTIVITYALL 23-20-59 Page 171 Mar 2011© Honeywell International Inc. Do not copy without express permission of Honeywell.
MAINTENANCE MANUAL965-1696(6) The aircraft radio would then tune to the frequency associated with the channel and wouldlook for an uplink from the sectors ground station to synchronize its receive time slot clockswith those of the ground station. VDL Mode 3 ground stations transmit management burstuplinks in their allocated time slots to allow aircraft to synchronize their clocks. If the aircraftdoes not receive any uplink transmissions from the ground station, it cannot synchronize itsclock and communication with the ground is not possible.(7) When the aircraft is synchronized with the ground station, voice communications between theaircraft and the ground station on the selected time slot can proceed. When operating in VDLMode 3, voice communications is initiated with a “listen before PTT” procedure. When the VDL3 radio uses a selected time slot, all digital voice traffic received on the selected time slot issent to the radio speaker. Voice traffic received on any other time slot is discarded.(8) VDL Mode 3 ground stations can be also be configured so that two time slots are used forvoice traffic and two used for data traffic (2V/2D configuration). Each sector is assigned a voiceand a data channel pair. When the airborne radio is tuned to a sector’s voice channel, it alsoautomatically tunes to the sectors data channel. If the ground station supports data servicesin addition to basic voice services as indicated in its management bursts, the radio sends anet entry request message to the ground station on the selected time slot to gain access tothe data services. When the VDL Mode 3 ground station receives a net entry request, a netresponse message is sent to the aircraft to configure access.(9) The net entry request message includes the 24-bit ICAO identifier assigned to the aircraft. Tosupport the enhanced features, VDL Mode 3 radios require access to a source of ICAO IDsuch as the Mode S transponder.(10) Downlink data transmission on the data channel is sent on slots reserved by the ground stationfor exclusive use by the aircraft. Reservation request messages can be sent by the aircraftusing either slotted aloha random access protocol or in response to polling from the groundstation. The maximum number of contiguous slots requested is 15.(11) The 2V/2D configurations require the airborne VDR to process voice audio and data linktraffic simultaneously. For example, while the VDR outputs received voice audio or digitizesand compresses transmit voice audio, it must also process and deliver received uplink datamessages or accept and transmit downlink data messages. As a result, the processing load issignificantly higher than that required for operation in a voice-only or data-only mode.(12) Like VDL Mode 2, VDL Mode 3 uses D8PSK modulation at a bit transmission rate of 31,500bps to deliver digitized and compressed speech as well as data messages. Note that VDLMode 3 requires that the modulation rate have an accuracy of ±5 PPM, where VDL Mode 2requires a modulation rate accuracy of ±50 PPM. As a result, VDL Mode 3 requires transmitterclocks that are 10 times more accurate than VDL Mode 2. The greater accuracy is needed toprovide aircraft at the edges of the coverage area to maintain time slot synchronization with theVDL Mode 3 ground station. This synchronization ensures that transmissions from aircraft atthe edge of the coverage area do not interfere with transmissions in adjacent time slots.(13) VDL Mode 3 operation requires radio management panels to have the capability to select theVDL 3 channel as well as to support unique enhanced voice services.F. VDL Mode 4 (Subtask 23-20-59-870-017-A01)(1) VDL Mode 2 provides data link throughput and VDL Mode 3 provides communications capacityenhancements and simultaneous voice and data communications. VDL Mode 4 provides bothbroadcast surveillance applications and air/ground data link communications. The surveillanceapplication supported by VDL Mode 4 allows aircraft to periodically broadcast their position andmonitor and display the position of other similarly equipped aircraft.EFFECTIVITYALL 23-20-59 Page 181 Mar 2011© Honeywell International Inc. Do not copy without express permission of Honeywell.
MAINTENANCE MANUAL965-1696(2) VDL Mode 4 subdivides each 25-kHz channel into periodic slots of 13.33-ms duration toallow short periodic transmissions from many aircraft. VDL Mode 3 requires each aircraft tosynchronize its TDMA slot timing to that of a ground station. VDL Mode 4 stations synchronizetheir TDMA slot timing to UTC derived from a source such as GPS.(3) VDL Mode 4 uses a slot reservation protocol that allows VDL Mode 4 stations to access thenetwork and assure that ADS-B transmission will not be interfered with, without the need forcoordination through a ground station. The access protocol used by VDL Mode 4 is STDMA.(4) VDL Mode 2 and VDL Mode 3 operate in simplex mode; that is, they operate in eithertransmit or receive mode on the same frequency. ADS-B operation over VDL Mode 4,requires concurrent transmission and reception on two different frequencies. Use of VDLMode 4 for both ADS-B surveillance and applications and for data link applications requiresconcurrent transmission and reception on three different frequencies. If VDL Mode 4 is usedonly for data link communications, transmission and reception on only one frequency at atime is required. As a result the required applications determine the type of radio requiredto support VDL Mode 4.6. Theory of Operation (TASK 23-20-59-870-806-A01)A. VDR Overview (Subtask 23-20-59-870-018-A01)(1) The RTA-50D VDR is an airborne VHF radio whose function is to provide aircraft withline-of-sight air/ground ATC voice and AOC data communications capability in the 118 to136.975-MHz VHF frequency band. The RTA-50D VDR is capable of operating in DSB-AManalog voice mode, VHF ACARS data modes (Mode A and Mode 0), and VDL Mode 2 datamode.(2) A typical aircraft installation consists of two VDRs dedicated for ATC voice communicationsand one VDR for data link communications and back up voice communications. Each VDRinterfaces to its own dedicated VHF blade antenna so that simultaneous operation of allthreeVDRsispossible.(3) Figure 6 shows the interfaces between the RTA-50D VDR and other avionics equipment.NOTE: Figure 6 also shows the inputs and outputs that are processed in each of themodes of operation. Interfaces that apply to typical new aircraft installations areshown as solid lines. Interfaces that apply to legacy retrofit DSB-AM voice-onlyinstallations that do not require VDL Mode A or VDL Mode 2 functionality areshown as dashed lines.EFFECTIVITYALL 23-20-59 Page 191 Mar 2011© Honeywell International Inc. Do not copy without express permission of Honeywell.
MAINTENANCE MANUAL965-1696Blank PageEFFECTIVITYALL 23-20-59 Page 201 Mar 2011© Honeywell International Inc. Do not copy without express permission of Honeywell.
MAINTENANCE MANUAL965-1696Figure 6. (Sheet 1 of 2) RTA-50D VDR Interface Context Diagram (GRAPHIC 23-20-59-99B-809-A01)EFFECTIVITYALL 23-20-59 Pages 21/221 Mar 2011© Honeywell International Inc. Do not copy without express permission of Honeywell.
MAINTENANCE MANUAL965-1696Figure 6. (Sheet 2 of 2) RTA-50D VDR Interface Context Diagram (GRAPHIC 23-20-59-99B-809-A01)EFFECTIVITYALL 23-20-59 Pages 23/241 Mar 2011© Honeywell International Inc. Do not copy without express permission of Honeywell.
MAINTENANCE MANUAL965-1696(4) Voice Communications Installations(a) Each VHF radio is controlled through one or two RTPs. The RTA-50D VDR providesARINC 429 interfaces to two RTPs. A discrete input labeled "frequency port select input"is used to determine which of the two RTP inputs controls the operation of the VDR.The contents of the ARINC 429 words received from the RTP are used by the VDR todetermine the voice channel (frequency) selected, as well as the type of voice channel:• DSB-AM voice with 8.33-kHz channel spacing• DSB-AM voice with 25-kHz channel spacing.(b) An analog audio input and output pair provide the interfaces to the microphone andspeakers. A discrete input labeled PTT provides the means to switch betweentransmit and receive operation. When the VDR is operating in transmit mode (PTT isgrounded), the transmitted audio is output to the Rx audio/side-tone output port. TheRx audio/side-tone output is muted during transmit operation if an internal VDR failureprevents the radio from transmitting RF.(c) The RTA-50D VDR provides ARINC 429 interfaces to the OMS. Two different OMSinterface protocols are supported as follows:• Airbus CMC/CFDS protocol• Boeing CMC protocol.(d) However, only one of the OMS interface protocols is supported at a time, depending onthe software version loaded (VDR part number).(5) Data Link Communications Installations(a) Data link capable installations can support data communications only or they can bewired to support both data and voice communications. When supporting voice and datacommunications, one or two RTPs provide the means to select the mode of operation(voice or data) and the means to select the voice channel. The mode of operation isdetermined from the contents of the ARINC 429 words received from the RTP or from adiscrete input labeled "voice/data select input" depending on the aircraft installation.(b) The RTA-50D VDR provides ARINC 429 data link interfaces to a CMU, ATSU, or ACRwhich is the source of the transmitted data messages and the destination of the receiveddata messages. A second CMU, ATSU, or ACR may be operated in standby mode if theaircraft installation supports ATC data link communications.(c) When the selected mode of operation is a data only mode (Mode 0, Mode A, or Mode 2),the particular data-only mode is determined from the presence or absence of ARINC 429data on the ARINC 429 data link interfaces to the two CMUs/ATSUs/ACRs.B. RTA-50D VDR System Architecture (Subtask 23-20-59-870-019-A01)(1) A high-level block diagram of the internal architecture of the RTA-50D VDR is shown in Figure7. The RTA-50D VDR consists of five subassemblies as follows:• Digital processor CCA• Front panel CCA• Power supply module• Rear interconnect module•RFCCA.EFFECTIVITYALL 23-20-59 Page 251 Mar 2011© Honeywell International Inc. Do not copy without express permission of Honeywell.
MAINTENANCE MANUAL965-1696(2) The RTA-50D VDR is packaged in a 3MCU standard form factor. A low insertion force, Size1 shell ARINC 600 connector with three inserts provides the means to interface to otheronboard avionics as well as the antenna and aircraft power. The top plug and middle pluginserts are used for system interconnects. The bottom plug insert is used for input powerand coaxial antenna connections.EFFECTIVITYALL 23-20-59 Page 261 Mar 2011© Honeywell International Inc. Do not copy without express permission of Honeywell.
MAINTENANCE MANUAL965-1696Figure 7. (Sheet 1 of 1) RTA-50D VDR Internal Architecture (GRAPHIC 23-20-59-99B-810-A01)EFFECTIVITYALL 23-20-59 Pages 27/281 Mar 2011© Honeywell International Inc. Do not copy without express permission of Honeywell.
MAINTENANCE MANUAL965-1696C. RF CCA (Subtask 23-20-59-870-020-A01)(1) General(a) The RF CCA performs the basic VHF receive and transmit functions of the VDR in allvoice and data modes of operation. The RF CCA circuitry is comprised of five processingsections:• Receiver section• Transmitter section• LO frequency synthesizer section•RFcontrol• BIT monitoring circuits.(b) A block diagram of the RF CCA is shown in Figure 8.EFFECTIVITYALL 23-20-59 Page 291 Mar 2011© Honeywell International Inc. Do not copy without express permission of Honeywell.
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MAINTENANCE MANUAL965-1696Figure 8. (Sheet 1 of 1) RF CCA (GRAPHIC 23-20-59-99B-811-A01)EFFECTIVITYALL 23-20-59 Pages 31/321 Mar 2011© Honeywell International Inc. Do not copy without express permission of Honeywell.
MAINTENANCE MANUAL965-1696(2) Receiver(a) The receiver section of the RF CCA employs a heterodyne architecture to converta received RF signal in the 118 to 136.975-MHz range to baseband quadrature digitalsamples.(b) A preselector filter followed by an LNA and another preselector filter first limit the RFbandwidth to about less than 2 MHz centered about the selected operating frequency.The preselectors center frequency is voltage controlled. The voltage level is selectedby the RF control FPGA from a table of settings prestored in an EEPROM whenever anew operating frequency is selected. A pin-diode variable attenuator preceding the firstpreselector provides the means to attenuate the received RF signal when the outputof the second preselector exceeds the level at which the RF-to-IF conversion mixerbecomes nonlinear.(c) The RF-to-IF conversion is accomplished by mixing the received RF signal with a LOsignal in the 139.825 to 158.800-MHz range to produce an IF signal at 21.825 MHz. Afour-pole crystal filter with nominal 25-kHz bandwidth which follows the mixer providesenough rejection of undesired signals occupying channels adjacent to the selectedfrequency to prevent aliasing and/or desensitization in the A/D conversion process.(d) The IF signal is then digitized at 50.4 mega-samples each second by an ADC anddigitally down converted to baseband in-phase and quadrature digital sample streamsusing a programmable DDC integrated circuit. The DDC also performs the 25 or8.33-kHz channel selectivity filtering to reject adjacent channel signals. The DDC channelselectivity is preprogrammed and the desired channel bandwidth is selected by the RFcontrol FPGA whenever a new channel is selected. The filtered in-phase and quadraturedigital sample streams are decimated by the DDC and sent to the digital processor CCAat an 84-kHz rate through a serial bus interface provided by the RF control FPGA.(e) The input signal level at the ADC is held constant by means of an AGC amplifier circuit.The AGC control signal is generated by a DSP in the digital processor CCA and passedon to the RF CCA through the serial bus connection to the RF control FPGA.(3) Transmitter(a) The transmitter section of the RF CCA also utilizes a heterodyne architecture forconversion of in-phase and quadrature digital samples to a RF signal in the 118 to136.975-MHz band.(b) Baseband in-phase and quadrature digital sample streams generated by the digitalprocessor CCA are sent to the RF CCA at a 252-kHz rate in serial format through theserial bus connection to the RF control FPGA. A preprogrammed DUC up samples andinterpolates the in-phase and quadrature digital sample streams to a 50.4-MHz samplerate and up converts them to an analog IF signal at 21.825 MHz.(c) A four-pole crystal filter with nominal 25-kHz bandwidth is used to reject the harmonicsand spurious of the D/A conversion process. This IF signal is amplified and up convertedto the selected VHF channel by mixing it with the same 139.825 to 158.800-MHz LO usedby the receiver. A SAW filter with 20-MHz bandwidth (centered on the 118 to 137-MHzband), followed by a post selector filter with about a 4-MHz bandwidth (centered aboutthe selected operating frequency) are then used to reject LO leakage and harmonicproducts of the mixer. The post selectors center frequency is voltage controlled. Thevoltage level is selected by the RF control FPGA from a table of settings prestored in anEEPROM whenever a new operating frequency is selected.EFFECTIVITYALL 23-20-59 Page 331 Mar 2011© Honeywell International Inc. Do not copy without express permission of Honeywell.
MAINTENANCE MANUAL965-1696(d) The filtered RF signal is then amplified to produce a 25-watt average RF output signalwhen operating in DSB-AM voice or ACARS Mode A data mode, or a 17.5-watt averageRF output signal when operating in VDL Mode 2 data mode. An ALC signal generatedby the RF control FPGA is used to set the transmitter output power at the desired levelfor the operating mode during the ramp-up transition from receive to transmit. Whenoperating in DSB-AM voice or data mode, the ALC signal is also used to maintain theoutput signal level at the desired level throughout the transmission.(e) A 20-dB coupler at the output of the transmitter is used to obtain low-power forward andreverse voltage replicas of the transmitted RF signal. The forward and reverse voltagesare envelope detected and digitized for downstream processing by the RF control FPGAand DSPs on the digital processor CCA. The forward voltage signal is used by the FPGAto derive the ALC control signal and by the DSPs to derive transmit audio side tone whenoperating in DSB-AM voice mode. The forward and reverse voltages are used by theDSP to monitor the antenna VSWR during transmit operation in all modes.(f) An antenna DC ground monitoring circuit is also used at the antenna port to detectantenna faults on aircraft installations that use DC grounded antennas (pin programmingselectable).(4) LO Frequency Synthesizer(a) The LO frequency synthesizer section of the RF CCA generates the 139.825 to158.800-MHz LO signal that is used by the transmitter and receiver chains. The LOfrequency synthesizer is comprised of a reference oscillator, a PLL frequency synthesizerintegrated circuit, and VCO.(b) The reference oscillator is a TCXO that generates a 50.4-MHz reference clock signalthat is used to generate the LO frequency as well as the clocks for the ADC, DDC,DUC, and for the digital processor circuitry.(c) The PLL and VCO generate the selected LO frequency from the reference frequencyprovided by the TCXO. The LO frequency selection (tuning) is controlled by the digitalprocessor CCA and the synthesizer programming data is passed to the LO frequencysynthesizer through the RF control FPGA. The LO frequency synthesizer provides anindication (synthesizer lock) to the RF control FPGA when it has tuned to the selectedfrequency.(5) RF Control(a) The RF control functions are implemented in a Xilinx Spartan lIe FPGA with 300,000gates. The RF control FPGA is responsible for managing the flow of transmit and receivedigital data samples, and command and control data by interfaces to the devices thatfollow:• TMS320C6711 DSP bi-directional serial communications port (MCBSP) interface• MPC8250 processor SPI• Transmitter DUC interface• Receiver DDC interface• Receiver high-speed A/D converter (ADC) interface• Frequency synthesizer interface• RF BIT MUX A/D converter interface• Voltage monitoring BIT MUX A/D converter interfaceEFFECTIVITYALL 23-20-59 Page 341 Mar 2011© Honeywell International Inc. Do not copy without express permission of Honeywell.
MAINTENANCE MANUAL965-1696• Digital potentiometer interface• Serial EEPROM interface• Transmitter ALC• External discrete I/O interface.(b) The RF control FPGA receives 24-bit command data consisting of alternating 14-bit I andQ transmit data samples, 6-bit control words, and 4-bit command code sent from theTMS6711 DSP on the downstream MCBSP serial bus at a 504-kHz rate. The RF controlFPGA writes the 14-bit I or Q data to the DUC if transmit mode is enabled (appropriate bitin control word is set), and decodes the 6-bit control words to control various transceivercomponents on the RF CCA. The transceiver functions controlled are as follows:• Enabling of Tx function• Antenna Tx/Rx switching• LO Tx/Rx switching•Driver/PATx bias enabling• Forced termination of Tx data flow.(c) The TMS6711 DSP also uses the downstream 24-bit command data to command theRF control FPGA to program and configure the DUC and DDC during power up andafter mode changes.(d) The RF control FPGA sends 192-bit data frames to the TMS6711 DSP on a second(upstream) MCBSP serial bus at an 84-kHz rate. The 192-bit frame contains:• The 32-bit I and Q receive data from DDC channel 0 for data demodulation• The 32-bit I and Q receive data from DDC channel I for adjacent channel interferencedetection• The 32-bit ADC output values for AGC• The 32-bit frame ID/BIT data values for frame synchronization and fault/event detection.(e) The BIT data content of the last 32 bits of each frame rotates on an 8-frame cycle. The17-bit data consists of an 8-bit field that alternates between data samples of:• Driver bias monitor• PA bias monitor• Temperature sense• An Rx RF monitor• A 28-volt monitor• Rx LO level monitor• Requested data ID or requested data• An 8-bit field that alternates between samples of forward power and reverse power• A 1-bit field that alternates between antenna DC monitor, synthesizer lock, FPGA SEUflag, FPGA watchdog, and DUC overflow flag status.(f) The transmission of each frame is periodic and synchronized to the receiver DDC framesynchronization signal. An automatic upstream mode also exists to send data when theDDC is not operating.EFFECTIVITYALL 23-20-59 Page 351 Mar 2011© Honeywell International Inc. Do not copy without express permission of Honeywell.
MAINTENANCE MANUAL965-1696(g) In transmit mode, the RF control FPGA uses the RF BIT MUX forward power samplesto derive an automatic level control signal to adjust the PA gain using the digitalpotentiometer interface.(h) Other functions performed by the RF control FPGA include:• MPC8250 processor and TMS6711 DSP write access to the LO frequency synthesizerdevice to select the LO frequency• TMS6711 DSP read/write access to the serial EEPROM through commands• TMS6711 DSP write access to the serial pot interface to update 1 of 16 availabledigital potentiometers• TMS6711 DSP write access to various FPGA mode and discrete output registers• TMS6711 DSP read access to RF control FPGA revision and discrete input bits.(6) BIT Monitoring(a) The RF CCA incorporates BIT circuitry to detect failures both during normal operation aswell as during power on self-test and operator-initiated self-test.(b) The Tx/Rx BIT signals continuously monitored (RF BIT MUX) during normal transmitand receive operation include:• Transmit forward power measured at the antenna port during transmit operation• Reflected power measured at the antenna port during transmit operation• Primary 28-volt input to the RTA-50D VDR• DC bias voltages of the driver and final PA devices• Temperature of the RF CCA• Received signal level at down converter mixer• LO output level.(c) The distributed voltage regulators continuously monitored (PS monitor BIT MUX) include:• 9-volt regulator output• 6-volt regulator output• 5-volt regulator output• 3.3-volt regulator output• -5-volt regulator output• 1.8-volt regulator output.(d) Other signals continuously monitored are the synthesizer lock detector output.(e) During power on self-test, the RF CCA performs an antenna continuity test to detect thepresence or absence of an antenna connection and a receiver functionality test under thecontrol of the digital processor CCA. The receiver functionality test consists of loopingback a test RF signal generated by the DUC that is injected into the receiver chain andmeasuring the SNR of the received signal. Refer to Figure 8.(f) When self-test is initiated by the operator, the RF CCA performs the antenna continuitytest and receiver functionality test as well as a transmitter/antenna test. Thetransmitter/antenna test consists of the transmission of a test signal at 118 MHz andthe measurement of the forward transmitted and reflected powers at the antenna port.EFFECTIVITYALL 23-20-59 Page 361 Mar 2011© Honeywell International Inc. Do not copy without express permission of Honeywell.
MAINTENANCE MANUAL965-1696Reporting of the measurements to the digital processor CCA for computation of theVSWR then takes place.D. Digital Processor CCA (Subtask 23-20-59-870-021-A01)(1) General(a) The digital processor CCA comprises nine processing sections:• MPC8250 main processor• TMS320C6711 digital signal processor (main DSP)• TMS320VC5410A digital signal processor (auxiliary DSP)• Audio I/O circuitry• ARINC 429 I/O circuitry• Discrete I/O circuitry• Clock generation circuitry• Monitoring circuitry• Manufacturing and engineering support I/O circuitry.(b) A block diagram of the digital processor CCA is shown in Figure 9.EFFECTIVITYALL 23-20-59 Page 371 Mar 2011© Honeywell International Inc. Do not copy without express permission of Honeywell.
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MAINTENANCE MANUAL965-1696Figure 9. (Sheet 1 of 1) Digital Processor CCA Block Diagram (GRAPHIC 23-20-59-99B-812-A01)EFFECTIVITYALL 23-20-59 Pages 39/401 Mar 2011© Honeywell International Inc. Do not copy without express permission of Honeywell.
MAINTENANCE MANUAL965-1696(2) Main Processor(a) The main processor is a Motorola MPC8250 Power PC with 64 Mbit of external flashfor boot/program memory, 256 Mbit of external SDRAM for program and data memory,64 Mbit of external SDRAM for program and data memory ECC, and 256 Kbit externalEEPROM for fault and configuration memory.(b) The MPC8250 processor interfaces to the ARINC 429 I/O FPGA through a PCI bus andto discrete inputs and outputs to determine the mode of operation and frequency/channelselection. The MPC8250 processor performs the tuning of the VHF transceiver LOsynthesizer according to the selected mode and channel through the RF control FPGA onthe RF CCA by means of a SPI.(c) The MPC8250 processor interfaces to the TMS6711 DSP and TMS5410 DSP throughshared memory messages accessed by HPI built into each DSP. The HPI is a parallelport through which the MPC8250 can directly access the DSP shared memory. Whenoperating in the Mode A or Mode 2 data modes, the MPC8250 manages the delivery ofuplink data messages received from the TMS6711 DSP to the ARINC 429 transmitterwithin the ARINC 429 I/O FPGA that interfaces to the external user (ATSU or CMU). Italso controls the flow of downlink data messages received from the ARINC 429 receiverthat interfaces to ATSU or CMU to the TMS6711 DSP.(d) The MPC8250 processor also interfaces on an external OMS through an ARlNC 429transmitter/receiver pair synthesized within the ARINC 429 I/O FPGA to report faultdata collected by BIT function.(e) The MPC8250 processor BIT function controls three different modes of self-test that areused to monitor the health of the RTA-50D VDR and detect faults:• Power on self-test• Operator initiated functional self-test• Background (continuous monitoring) self-test.(f) Power on self-test is initiated each time the power is cycled on the unit. Some testsare intrusive meaning that some VDR to aircraft interfaces can not be read or drivenaccording to normal aircraft operation. The list that follows describes the functionalblocks that are tested but not in what order:• MPC8250 register test• MPC8250 SDRAM• MPC8250 FLASH• MPC8250 EEPROM• DSP HPI interface• TMS6711 DSP register test• TMS6711 DSP SDRAM• TMS5410 DSP register test• Audio CODEC register test• ARINC 429 I/O FPGA PCI register test•SDIdiscretetest• Antenna monitor discrete test• ARINC 429 I/O loopbackEFFECTIVITYALL 23-20-59 Page 411 Mar 2011© Honeywell International Inc. Do not copy without express permission of Honeywell.
MAINTENANCE MANUAL965-1696• Ethernet loopback• RF control FPGA interface test• Voltage monitor.(g) Operator-initiated functional self-test can be initiated by pressing the front panel switch,grounding the functional test discrete or OMS command. The set of tests executed arethe same as in the power on self-test plus additional transmitter and receiver loop backtests that check the functionality of the transmitter, antenna, interface, and receiver. Thismode is useful in diagnosing problems only seen after the RTA-50D VDR has beenrunning for some time.(h) Background self-tests are run continuously in the RTA-50D VDR as long as power isapplied. These tests only exercise circuitry in a way that is nonintrusive to systemoperation. The background self-tests listed as follows are a subset of the functionalself-tests but, where possible, use the same test software routines:• MPC8250 SDRAM• MPC8250 FLASH• MPC8250 EEPROM• DSP HPI interface• TMS6711 DSP SDRAM• Ethernet loopback• RF control FPGA interface test• Voltage monitor.(3) Main DSP(a) The main DSP is a Texas Instruments TMS320C6711 DSP with 64 Mbit of externalSDRAM for program and data memory.(b) The TMS6711 DSP interfaces to the RF control FPGA through a MCBSP serial busand to the TMS5410 DSP through a second MCBSP serial bus. The TMS6711 DSPinterfaces to the MPC8250 through shared memory accessed by its HPI interface. Theshared memory is configured as 64 message buffers of 4,096 bytes for each transferdirection as well as a 592-byte control/status buffer. The TMS6711 DSP program isloaded into its internal RAM and external SDRAM by the MPC8250 on power up.(c) The TMS6711 DSP processes digital data provided by the RF control FPGA to generatethe receiver AGC loop control voltage in all voice and data receive modes of operation.(d) When operating in voice mode, the TMS6711 DSP monitors the PTT input to determinewhen to switch between receive and transmit operation, and controls the switching of theTMS5410 DSP between transmit and receive operation.(e) When operating in voice transmit mode, the TMS6711 DSP performs the real-timeDSB-AM of digitized voice samples received from the TMS5410 DSP and delivers252-kilo sample each second streams of I and Q digital modulation samples to theRF CCA for RF carrier modulation and downlink transmission. Simultaneously whiletransmitting the modulation samples, the TMS6711 DSP delivers the forward powersamples received from the RF CCA to the TMS5410 for side-tone output.(f) When operating in voice receive mode, the TMS6711 DSP performs envelope detectionof the 84-kilo sample each second I and Q digital data streams received from the RF CCAand delivers the demodulated samples to the TMS5410 DSP.EFFECTIVITYALL 23-20-59 Page 421 Mar 2011© Honeywell International Inc. Do not copy without express permission of Honeywell.
MAINTENANCE MANUAL965-1696(g) When operating in Mode A or Mode 2 data mode, the TMS6711 DSP monitors thereceiver AGC control loop voltage to determine when the channel is idle and availablefor transmit operation. When the channel is idle and a data message is queued fortransmission, the TMS6711 DSP switches to data transmit operation; otherwise itoperates in data receive mode. When operating in data transmit mode, the TMS6711DSP performs the encoding of data messages received from the MPC8250 andgenerates a 252-kilo sample each second. Streams of I and Q digital samples of themodulation waveform correspond to the data mode selected by the user. When operatingin data receive mode, the TMS6711 DSP performs message detection, decoding, errordetection, and address screening, and delivers the error-free decoded messages withmatching address to the MPC8250 for up-stream delivery.(4) Auxiliary DSP(a) The auxiliary DSP is a Texas Instruments TMS320VC5410 DSP with no external memory.(b) The TMS5410 DSP interfaces to the TMS6711 DSP through McBSP serial bus and to theaudio input/output CODEC through a second McBSP serial bus. The TMS5410 DSPinterfaces to the MPC8250 through shared memory accessed by its HPI interface. Theshared memory is configured as 8 message buffers of 176 bytes for data transfer to theMPS8250, 12 message buffers of 176 bytes for data transfer from the MPC8250, and a16-byte control/status buffer. The TMS5410 DSP program is loaded into its internal RAMbytheMPC8250onpowerup.(c) When operating in transmit mode, the TMS5410 DSP performs digital filtering of thedigitized audio input samples provided by the audio CODEC at 42-kilo samples eachsecond and sends the filtered transmit audio samples to the TMS6711 DSP for DSB-AMmodulation and up-sampling. The demodulated transmit audio which is simultaneouslyreceived from the TMS6711 DSP is sent to the side-tone output of the audio CODEC.(d) When operating in receive mode the TMS5410 DSP performs the audio bandpass filteringand squelch control processing functions and sends the 42-kilo sample each secondstream of digital audio samples to the receive/side-tone output of the audio CODEC.(5) Audio I/O Circuitry(a) The audio I/O circuitry is comprised of an Analog Devices ADI836AS audio CODECintegrated circuit that supports A/D and D/A conversion of up to four channels, and audioinput/output conditioning (low-pass filters) for each audio signal.(b) Three CODEC A/D channels are used to support the following audio inputs:• Microphone audio input for use on installations that support DSB-AM voice• Modem audio input for use on installations that support Mode 0 data• Remote squelch control input for use on installations that support remote squelchcontrol of DSB-AM voice audio.(c) Three CODEC D/A channels are used to support the following audio outputs:• Received audio/side-tone output to the speaker for use on installations that supportDSB-AM voice• SELCAL audio output for use on installations that support DSB-AM voice or Mode 0data link modem audio output for use on Mode 0 data installations• Analog AGC control voltage to support DSB-AM MOPS compliance testing.EFFECTIVITYALL 23-20-59 Page 431 Mar 2011© Honeywell International Inc. Do not copy without express permission of Honeywell.
MAINTENANCE MANUAL965-1696(6) ARINC 429 I/O Circuitry(a) The ARINC 429 I/O transmitter encoding and receiver decoding logic is implementedin an Actel ProASIC Plus flash FPGA with 600,000 gates. Digital logic-to-CMOS leveltranslation circuits are provided externally for each transmitter and receiver.(b) The ARINC429 I/O FPGA interfaces to the MPC8250 through a PCI bus interface. TheARINC 429 I/O FPGA supports 4 ARINC 429 transmitters and 11 ARINC 429 receiverswith automatic speed detection.(c) The ARINC 429 transmitters are used to do the following functions:• Data link output high-speed transmitter• OMS output low-speed transmitter• Two spare transmitters.(d) The ARINC 429 receivers are used to do the following functions:• Two frequency select tuning input receivers• Two data link input receivers• Two OMS input receivers• Five spare receivers.(7) Clock Generator(a) The clocks for the various processors are generated by a Cypress Semiconductorprogrammable clock generator integrated circuit. The clock generator derives thefollowing clocks from a 50.4-MHz clock input from RF CCA:• 58-MHz clock provided to the MPC8250• 50-MHz clock provided to the TMS5410 DSP• 35-MHz clock provided to the TMS6711 DSP• 25-MHz clock provided to the Ethernet transceiver• 10.24-MHz clock provided to the audio CODEC.(8) Monitoring Circuitry(a) The monitoring circuitry consists of voltage level monitoring circuits and a processorwatchdog circuit. The digital processor regulator voltage levels monitored are as follows:•+12volts•12 volts•+5volts•+3.3volts•+2.5volts•+1.9volts•+1.5volts• +1.26 volts.(b) The ARINC 429 I/O FPGA provides a supervisory watchdog function used to monitorthe MPC8250 main processor. If the MPC8250 fails to monitor the watchdog register at10-ms intervals, the MPC8250 is reset by the ARINC 429 I/O FPGA.EFFECTIVITYALL 23-20-59 Page 441 Mar 2011© Honeywell International Inc. Do not copy without express permission of Honeywell.
MAINTENANCE MANUAL965-1696(9) Manufacturing and Engineering Support I/O Circuitry(a) The manufacturing and engineering support I/O circuitry consists of:• Ethernet interface used for data loading and troubleshooting• RS232 port used for test equipment support.E. Front Panel I/O Board (Subtask 23-20-59-870-022-A01)(1) The front panel I/O board performs the conditioning of the signals that drive three LED lightsand monitors a push-button switch on the front panel of the RTA-50D VDR to initiate LRUself-test. No self-test is available for this subassembly.F. Power Supply (Subtask 23-20-59-870-023-A01)(1) The power supply subassembly is a self-contained high-efficiency power supply that convertsthe 28-VDC power into the DC operating voltages required by each subassembly. The powersupply circuitry is grouped into three sections:• Power hold circuitry• Input voltage conditioning circuitry• DC-to-DC voltage conversion and output voltage conditioning.(2) The power supply is capable of holding power up during power input interrupts lastingup to 200 ms. Each of the power supply output voltages are monitored on either the RFsubassembly or the processor subassembly.G. Rear Interconnect (Subtask 23-20-59-870-024-A01)(1) The rear interconnect subassembly consists of the ARINC 600 connector that provides themeans to interface the power supply module, the processor CCA, and the RF CCA to theaircraft wiring, and HIRF and lightning protection circuitry for each input/output. The RFand power supply inputs are in the bottom plug. Discrete, ARINC 429, and analog audioinputs/outputs are in the middle plug and the top plug.(2) There is no active circuitry on this assembly and thus it has a low failure rate. No self-test isavailable for the rear interconnect.EFFECTIVITYALL 23-20-59 Page 451 Mar 2011© Honeywell International Inc. Do not copy without express permission of Honeywell.
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MAINTENANCE MANUAL965-1696FAULT ISOLATION1. Planning Data (TASK 23-20-59-99C-801-A01)A. Reason for the Job (Subtask 23-20-59-99C-002-A01)(1) Use the procedures in this section to isolate faults.(2) Fault isolation is the process of isolating the source of a system failure to an LRU or to theaircraft wiring.(3) It is recommended that a system test of the RTA-50D VDR be done in accordance with theinstructions provided in the aircraft manufacturer’s AMM to confirm the reported fault condition.(4) Access to the equipment bay is necessary to view the RTA-50D VDR front panel maintenancestatus information and/or to initiate a self-test of the RTA-50D VDR equipment.(5) Fault isolation in the RTA-50D VDR includes a continuity check of the interwiring and theassurance that correct installation techniques and procedures have been followed.B. Job Setup Data (Subtask 23-20-59-99C-003-A01)(1) The list that follows identifies Honeywell publications that are related to this section:• Not applicable.2. Procedure (TASK 23-20-59-810-801-A01)A. Job Setup (Subtask 23-20-59-810-001-A01)CAUTION: USE INDUSTRY APPROVED ELECTROSTATIC DISCHARGE SENSITIVEPRECAUTIONS. THE RTA-50D VERY-HIGH FREQUENCY DATA RADIO CONTAINSELECTROSTATIC DISCHARGE SENSITIVE ITEMS.CAUTION: DO NOT DROP OR HIT THE RTA-50D VERY-HIGH FREQUENCY DATA RADIODURING THESE PROCEDURES. THE RTA-50D VERY-HIGH FREQUENCY DATARADIO CONTAINS AN ASSEMBLY THAT CAN BE DAMAGED FROM INCORRECTUSE.(1) Obey the precautions.B. Functional Self-Test (Subtask 23-20-59-810-002-A01)(1) A functional self-test of the RTA-50D VDR can be initiated by pressing the test key push-buttonon the front panel.(2) Results of the functional self-test are displayed on the LEDs located on the front panel. Referto Figure 1001.EFFECTIVITYALL 23-20-59 Page 10011 Mar 2011© Honeywell International Inc. Do not copy without express permission of Honeywell.
MAINTENANCE MANUAL965-1696Figure 1001. (Sheet 1 of 1) RTA-50D VDR Front Panel Functional Self-Test Interface(GRAPHIC 23-20-59-99B-813-A01)C. RTA-50D VDR Test Results (Subtask 23-20-59-810-003-A01)(1) Apply power to the RTA-50D VDR in accordance with the aircraft manufacturer’s AMM andconfirm that the circuit breaker associated with the RTA-50D VDR equipment is closed.(2) Locate the RTA-50D VDR in the equipment bay and observe the status of the LEDs accordingto the information provided in Table 1001.(3) In the event that a failure condition is indicated, do a self-test on the RTA-50D VDR as follows.(a) While power is applied to the RTA-50D VDR, momentarily depress the TEST pushbutton on the front panel.(b) Observe the LEDs according to the information provided in Table 1001.(c) In the event that a failure condition is indicated, note the indication and do the correctiveaction associated with the indicated fault condition.Table 1001. Front Panel Functional Self-Test ResultsMode RTA-50DPower VDRStatus ControlFault AntennaFault ReportedConditionPossibleCorrectiveAction CommentPower off Off Off Off Off LRU poweredoff None LRU powernot appliedNormaloperation On Green Off Off Normaloperation None LRUoperational,no errorsdetectedEFFECTIVITYALL 23-20-59 Page 10021 Mar 2011© Honeywell International Inc. Do not copy without express permission of Honeywell.
MAINTENANCE MANUAL965-1696Table 1001. Front Panel Functional Self-Test Results (Cont)Mode RTA-50DPower VDRStatus ControlFault AntennaFault ReportedConditionPossibleCorrectiveAction CommentGeneralfault On Off Off Off 1. Breakermalfunction2. LRUmalfunction1. Checkaircraftbreaker toLRU2. Reapplypower toLRU, removeif conditionrepeats1. Powernot reachingLRU dueto breakerproblem or2. LRUhas internalmalfunctionExternalfault(control)On Green Amber Off 1. RTPand/or CMCcontroller notpresent2. Internalmalfunctionof RTP/CMCinterface1. Checkaircraft RTPand CMCcontrollersand/orconnections2. Pressfunctionalself-testbutton,remove ifconditionrepeats1. RTPand/or CMCcontroller isnot present or2. LRUhas internalmalfunctionof RTP/CMCinterface 1Externalfault(antenna)On Green Off Amber 1. Antenna isnot present.2. Internalmalfunctionof antennainterface.1. Checkaircraftantenna,and antennaconnection2. Pressfunctionalself-testbutton,remove ifconditionrepeats1. Antennaor antennaconnection isnot present or2. LRUhas internalmalfunctionof antennainterface 2Externalfault(control/antenna)On Green Amber Amber Refer toexternal(control) faultand external(antenna)faultRefer toExternal(control) faultand external(antenna)faultRefer toexternal(control) faultand external(antenna)faultEFFECTIVITYALL 23-20-59 Page 10031 Mar 2011© Honeywell International Inc. Do not copy without express permission of Honeywell.
MAINTENANCE MANUAL965-1696Table 1001. Front Panel Functional Self-Test Results (Cont)Mode RTA-50DPower VDRStatus ControlFault AntennaFault ReportedConditionPossibleCorrectiveAction CommentInternalfault(boot)On Amber Amber Amber LRU did notcompletebootsequenceReapplypower toLRU, removeif conditionrepeatsBootsequencedid notcomplete dueto internalmalfunctionInternalfault On Red Off orAmber Off orAmber LRU reportsinternalmalfunction1. Pressfunctionalself-lestbutton2. If conditionrepeats,reapplypower to LRU3. If conditionrepeats,remove LRULRU hasdetectedinternalmalfunctionEFFECTIVITYALL 23-20-59 Page 10041 Mar 2011© Honeywell International Inc. Do not copy without express permission of Honeywell.
MAINTENANCE MANUAL965-1696Table 1001. Front Panel Functional Self-Test Results (Cont)Mode RTA-50DPower VDRStatus ControlFault AntennaFault ReportedConditionPossibleCorrectiveAction CommentInternalfault On Amber Off orAmber Off orAmber LRU reportsinternalmalfunction1. Pressfunctionalself-testbutton2. If conditionrepeats,reapplypower to LRU3. If conditionrepeats,remove LRULRU hasdetectedinternalmalfunctionInternalfault On Off Off orAmber Off orAmber LRU reportsinternalmalfunction1. Pressfunctionalself-testbutton2. If conditionrepeats,reapplypower to LRU3. If conditionrepeats,remove LRULRU hasdetectedinternalmalfunctionNOTES:1Only remove LRU if both RTP ports and both CMC ports are known to be connected and operating attime of fault inspection.2Only remove LRU if antenna is known to be good and antenna connection is verified to be good at time offault inspection.D. Job Close-up (Subtask 23-20-59-810-004-A01)(1) Not applicable.EFFECTIVITYALL 23-20-59 Page 10051 Mar 2011© Honeywell International Inc. Do not copy without express permission of Honeywell.
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MAINTENANCE MANUAL965-1696MAINTENANCE PRACTICES1. Planning Data (TASK 23-20-59-99C-802-A01)A. Reason for the Job (Subtask 23-20-59-99C-004-A01)(1) This section gives service personnel installation and maintenance information for the RTA-50DVDR. Installation instructions are supported by mechanical outline drawings and an electricalinterconnection diagram. These drawings must be reviewed by the installer and requirementsunique to the airframe must be established before starting the installation.(2) Use these diagrams as an aid to fault isolate the RTA-50D VDR.B. Job Setup Data (Subtask 23-20-59-99C-005-A01)(1) The list that follows identifies Honeywell publications that are related to this section:• Not applicable.2. Inspection After Unpacking (TASK 23-20-59-000-801-A01)A. General (Subtask 23-20-59-000-001-A01)CAUTION: THIS EQUIPMENT CONTAINS ELECTROSTATIC DISCHARGE SENSITIVE (ESDS)DEVICES. EQUIPMENT, MODULES, AND ESDS DEVICES MUST BE HANDLEDWITH APPROPRIATE PRECAUTIONS.(1) Visually inspect the RTA-50D VDR and all associated equipment for possible damage whichcan have occurred during shipment. Inspect for dents, deep abrasions, chipped paint, etc. Ifany equipment is damaged, notify the transportation carrier immediately.(2) The Honeywell test, inspection record, and quality report tag is included with each shippedunit. This informs the customer that the necessary production tests and inspection operationshave been performed on that particular unit.(3) One copy of the report tag is affixed to each unit by the first assembly inspector. As the unitproceeds through production and stock to the shipping area, the appropriate blocks on thetest and inspection record of the tag are stamped. This tag accompanies the unit when it isshipped to the customer. Customers are requested to complete the Honeywell Airlines andAvionics Products quality report portion of the tag and return it to the Honeywell Airlines andAvionics Products Quality Assurance Department. This portion of the tag provides Honeywellwith the necessary information required to evaluate shipping methods as well as test andinspection effectiveness.(4) Completed cards are accumulated to give information for a periodic analysis.3. Preinstallation Testing (TASK 23-20-59-000-802-A01)A. Overview (Subtask 23-20-59-000-002-A01)(1) The components in the RTA-50D VDR have been adjusted and tested before shipment.Preinstallation testing is not required. However if preinstallation testing of the RTA-50D VDR isdesired, refer to the customer acceptance criteria given in the CMM for the appropriate unit inthe system. Refer to Paragraph 3.A. (Subtask 23-20-59-99F-011-A01) in the INTRODUCTION(PGBLK 23-20-59-0) section for a list of related CMMs.EFFECTIVITYALL 23-20-59 Page 20011 Mar 2011© Honeywell International Inc. Do not copy without express permission of Honeywell.
MAINTENANCE MANUAL965-16964. Equipment Changes and Marking (TASK 23-20-59-000-803-A01)A. Overview (Subtask 23-20-59-000-003-A01)(1) Honeywell uses a standardized marking system to identify equipment and their subassemblieswhich have had changes incorporated. Refer to the front of the appropriate CMM for a list ofservice bulletins affecting the unit.5. Interchangeability (TASK 23-20-59-000-804-A01)A. Overview (Subtask 23-20-59-000-004-A01)(1) The RTA-50D VDR will operate in any installation that complies with ARINC Characteristic566A. Refer to Figure 2001.NOTE: Contact the OEM for certification status.6. Installation (TASK 23-20-59-000-805-A01)A. General (Subtask 23-20-59-000-005-A01)CAUTION: AFTER INSTALLATION OF THE CABLING AND BEFORE INSTALLATION OF THEEQUIPMENT, A CHECK MUST BE MADE WITH AIRCRAFT PRIMARY POWERSUPPLIED TO THE MOUNT CONNECTORS TO MAKE SURE THAT POWER ISAPPLIED ONLY TO THE PINS SPECIFIED IN INTERWIRING DIAGRAM. REFER TOFIGURE 2001.(1) The RTA-50D VDR must be installed in the aircraft in a manner consistent with acceptableworkmanship and engineering practices, and in accordance with the instructions in thismanual. To make sure that the system has been properly and safely installed in the aircraft,the installer must make a thorough visual inspection and conduct an overall operational andfunctional check of the system on the ground before flight.B. Location of Equipment (Subtask 23-20-59-000-006-A01)(1) Location of the RTA-50D VDR in the aircraft is not critical as long as the environment iscompatible with the equipment sign. Refer to Table 1 in the DESCRIPTION AND OPERATION(PGBLK 23-20-59-1) section. Forced air cooling is required for cooling the RTA-50D VDRcommunications transceiver in accordance with ARINC Characteristic 404A. The associatedcooling equipment must be mounted in accordance with the manufacturer’s instructions.(2) The RTA-50D VDR can use the existing MTA-43A mount or any other equivalent mountingtray that is compatible for securing a unit meeting the 1/2 ATR short form factor according toARINC Characteristic 404.(3) Antenna mounting must be in accordance with the manufacturer’s instructions for the antennabeing used. The coaxial cable connecting the antenna to the mount must be as short anddirect as possible and any required bends must be gradual. When two or more RTA-50D VDRsystems are installed in an aircraft, it is necessary to give adequate space isolation betweenthe antennas of each system to make sure that the use of one unit does not interfere withreception from another system. A minimum of 35 dB of space isolation must be provided andany steps which can be taken to give further isolation must be considered.(4) Control unit location and mounting can be determined by mutual agreement between theuser and airframe manufacturer.EFFECTIVITYALL 23-20-59 Page 20021 Mar 2011© Honeywell International Inc. Do not copy without express permission of Honeywell.
MAINTENANCE MANUAL965-1696C. Interwiring and Cable Fabrication (Subtask 23-20-59-000-007-A01)(1) General(a) Figure 2001 is the complete aircraft interwiring diagram for a single RTA-50D VDR systemand associated components. This diagram requires complete study before the installerbegins installation of the aircraft wiring.(b) When two or more systems are being installed in the aircraft, the interconnecting wiringas well as all other installation instructions must be duplicated.(c) Cabling must be fabricated by the installer. Wires connected to parallel pins must beapproximately the same length so that the best distribution of current can be effected.Honeywell recommends that all wires including the spares must be included in thefabricated harness. However, if full ARINC wiring is not desired, the installer mustmake sure that the minimum wiring requirements for the features and functions areincorporated. Refer to Figure 2001.NOTE: To allow for inspection or repair of the connector or the wiring to the connector,sufficient lead length must be provided. This will let the rear connectorassembly to be pulled forward several inches when the mounting hardwarefor the rear connector assembly is removed. A bend must be made in theharness near the connector to let water condensation drip off at the bendand not collect at the connector.(d) When the cables are installed in the aircraft, they must be supported firmly enough toprevent movement and must be carefully protected against chafing. Additional protectionmust also be provided in all locations where the cables can be subject to abuse. Inwire bundles, the cabling must not be tied tightly together as this tends to increase thepossibility of noise pick-up and similar interference. When routing cables through theairframe, try to avoid running cables or wire close to power sources (400-Hz generator,etc.). If unavoidable, the cables must cross high-level lines at a right angle or high-qualityshielded conductors must be used.(e) If a cable must pass through a bulkhead between pressurized and unpressurized zones,this passage must conform to the aircraft manufacturer’s specifications.(f) The assembler must be knowledgeable of any system variations unique to the installationand must completely understand the complexities associated with handling relatedproblems of line lengths, capacitance, and of susceptibility to interference.(g) The following determinants are the responsibility of the installation agency for fabricationof the wiring harness. Refer to Table 2001.Table 2001. RTA-50D VDR Communications Transceiver Connector DeterminantsPin No. Type Signal Name FunctionMPA1 Input MIC audio input (high) Microphone audio input. Part of the standard four wiremicrophone interwiring as described in Attachment6 of ARINC 716-10. Required for ARINC 716 VHFcommunication only.MPB1 Input MIC audio input (low) Microphone audio input. Part of the standard four wiremicrophone interwiring as described in Attachment6 of ARINC 716-10. Required for ARINC 716 VHFcommunication only.EFFECTIVITYALL 23-20-59 Page 20031 Mar 2011© Honeywell International Inc. Do not copy without express permission of Honeywell.
MAINTENANCE MANUAL965-1696Table 2001. RTA-50D VDR Communications Transceiver Connector Determinants (Cont)Pin No. Type Signal Name FunctionMPC1 Input MIC PTT Microphone PTT discrete input.Ground/low = transmitter keyed.Open/high = transmitter not keyed.Part of the standard four-wire MIC interwiring asdescribed in Attachment 6 of ARINC 716·10. Requiredfor ARINC 716 VHF communication only.MPD1 Output Key event Discrete input to flight recorder. Follows the state ofMIC PTT input.Ground/low = transmitter keyedOpen/high = transmitter not keyedRequired for ARINC 716 VHF communication only.MPA2 Input MAX transmit time cutofffunction Discrete input that enables the MAX transmit cutofffunction.Ground/Low = cutoff disabledOpen/High = cutoff enabledMPB2 NA MIC input ground Required for ARINC 716 VHF communication only.MPC2 Input Data loader input Bus A A high-speed ARINC 429 input port to allow on-boarddata loading for software.MPD2 Input Data loader input Bus B Ahigh-speed ARINC 429 input port to allow on-boarddata loading for software.MPA3 Input Optional remote squelch(high) To accommodate an optional remote squelchadjustment if so required or provided. Required forARINC 716 VHF communication only.MPB3 Input Optional remote squelch(arm) To accommodate an optional remote squelchadjustment if so required or provided. Required forARINC 716 VHF communication only.MPC3 Input Optional remote squelch(low) To accommodate an optional remote squelchadjustment if so required or provided. Required forARINC 716 VHF communication only.MPD3 NA DC ground Required for both ARINC 716 VHF communication andARINC 750 VDR; functions are identical.MPA4 Input Functional test Discrete input that activates LRU functional testfunction. ground/low = activate functional test.Required for ARINC 716 VHF communication.MPB4 NA Audio ground Required for ARINC 716 VHF communication only.MPC4 Output Data loader output Bus A A high-speed ARINC 429 output port to allow on-boarddata loading for software.MPD4 Output Data loader output Bus B A high-speed ARINC 429 output port to allow on-boarddata loading for software.EFFECTIVITYALL 23-20-59 Page 20041 Mar 2011© Honeywell International Inc. Do not copy without express permission of Honeywell.
MAINTENANCE MANUAL965-1696Table 2001. RTA-50D VDR Communications Transceiver Connector Determinants (Cont)Pin No. Type Signal Name FunctionMPA5 Input Data link data input (high) Analog 2,400-bps ACARS data input. Required forARINC 716 VHF communication only.MPB5 Input Data link data input (low) Analog 2,400-bps ACARS data input. Required forARINC 716 VHF communication only.MPC5 NA Reserved No. 1 Leave open.MPD5 Output 8.33 kHz programming Discrete output that indicates to control panel the VDRis capable of 8.33 or 25-kHz operation. This output isinternally grounded.MPA6 Input Data from OMS/CFDS No.1 Input Port (A) One of two low-speed ARINC 429 data input portsprovided for dual OMS/CFDSs. Required for bothARINC 716 VHF communication and ARINC 750 VDR;functions are identical.MPB6 Input Data from OMS/CFDS No.1 Input Port (B) One of two low-speed ARINC 429 data input portsprovided for dual OMS/CFDSs. Required for bothARINC 716 VHF communication and ARINC 750 VDR;functions are identical.MPC6 Input Data from OMS/CFDS No.2 Input Port (A) One of two low-speed ARINC 429 data input portsprovided for dual OMS/CFDSs. Required for ARINC750 VDR only.MPD6 Input Data from OMS/CFDS No.2 Input Port (B) One of two low-speed ARINC 429 data input portsprovided for dual OMS/CFDSs. Required for ARINC750 VDR only.MPA7 InputFrequency/function selectdata l/P Port B (A) One of two low-speed ARINC 429 input ports toprovide frequency tuning data. Required for ARINC716 VHF communication only.MPB7 Input Frequency/function selectdata l/P Port B (B) One of two low-speed ARINC 429 input ports toprovide frequency tuning data. Required for ARINC716 VHF communication only.MPC7 Input Voice/data select Discrete input that enables either the PTT key line(MPC1) or the Data key line (MPD7).Ground/low = data Key line enabledOpen/High = PTT enabled.Required for ARINC 716 VHF communication only.MPD7Input Data key line Discrete input that keys the transmitter.Ground/low = transmitter keyed.Open/high = transmitter not keyed.Required for ARINC 716 VHF communication only.MPA8 Input Antenna monitor enableinput Discrete input that allows antenna monitor functionat power-up.Ground/low = monitor enabled.Open/high = monitor disabled.EFFECTIVITYALL 23-20-59 Page 20051 Mar 2011© Honeywell International Inc. Do not copy without express permission of Honeywell.
MAINTENANCE MANUAL965-1696Table 2001. RTA-50D VDR Communications Transceiver Connector Determinants (Cont)Pin No. Type Signal Name FunctionMPB8 Input Data loader enable input Discrete input to allow on-board data loading ofsoftware. Required for ARINC 750 VDR only.MPC8 Input Frequency offset enable Not implemented.MPD8 NA Data key line return Required for ARINC 716 VHF communication only.MPA9 Input SDI Bit 0 program A discrete input pair pre-wired at the rear connector toidentify the specific VHF radio location in the aircraft.Required for both ARINC 716 VHF communication andARINC 750 VDR; functions are identical.MPB9 Input SDI Bit 1 program A discrete input pair pre-wired at the rear connector toidentify the specific VHF radio location in the aircraft.Required for both ARINC 716 VHF communication andARINC 750 VDR; functions are identical.MPC9 NA SPI program pin common Ground for the SDI code inputs. Required for ARINC716 VHF communication only.MPD9 Output AGC out AGC output signal for test purposes.MPA10 NA Spare NAMPB10 NA Spare NAMPC10 Output Data to CMU No. 1, CMUNo. 2 output Port (A) A high-speed ARINC 429 output port to CMU/MU/ATSUNo. 1 and No. 2. Required for ARINC 750 VDR only.MPD10 Output Data to CMU No. 1, CMUNo. 2 output Port (B) A high-speed ARINC 429 output port to CMU/MU/ATSUNo. 1 and No. 2. Required for ARINC 750 VDR only.MPA11 Input Frequency/function selectdata I/P Port A (A) One of two low-speed ARINC 429 input ports toprovide frequency tuning data. Required for ARINC716 VHF communication only.MPB11 Input Frequency/function selectdata I/P Port A (B) One of two low-speed ARINC 429 input ports toprovide frequency tuning data. Required for ARINC716 VHF communication only.MPC11 Input Maintenance system ID 1 Identifies CFDS type along with MPA14.MPD11 Input Frequency port select Discrete input used to select either frequency/functionselect data l/P Port A or B.Ground/low = Select Port A.Open/high = Select Port B.Required for both ARINC 716 VHF communication andARINC 750 VDR; functions are identical.MPA12 Input CMU No. 1 input Bus A A high-speed ARINC 429 input port fromCMU/MU/ATSU No. 1. Used to receivecommands/status/data in Williamsburg files,and periodic and aperiodic ARINC 429 words.Required for ARINC 750 VDR only.EFFECTIVITYALL 23-20-59 Page 20061 Mar 2011© Honeywell International Inc. Do not copy without express permission of Honeywell.
MAINTENANCE MANUAL965-1696Table 2001. RTA-50D VDR Communications Transceiver Connector Determinants (Cont)Pin No. Type Signal Name FunctionMPB12 Input CMU No. 1 input Bus B A high-speed ARINC 429 input port fromCMU/MU/ATSU No. 1. Used to receivecommands/status/data in Williamsburg files,and periodic and aperiodic ARINC 429 words.Required for ARINC 750 VDR only.MPC12 Input CMU No. 2 input Bus A A high-speed ARINC 429 input port fromCMU/MU/ATSU No. 2. Used to receivecommands/status data in Williamsburg files,and periodic and aperiodic ARINC 429 words.Required for ARINC 750 VDR only.MPD12 Input CMU No. 2 input Bus B A high-speed ARINC 429 input port fromCMU/MU/ATSUNo.2.Usedtoreceivecommands/status data in Williamsburg files,and periodic and aperiodic ARINC 429 words.Required for ARINC 750 VDR only.MPA13 Output SELCAL audio and datalink output (high) An analog output to provide 2400-bps MSK data to theACARSMU.MayalsobeusedforSELCALprovisions.Required for ARINC 716 VHF communication only.MPB13 Output SELCAL audio and datalink output (low) An analog output to provide 2400-bps MSK data to theACARSMU.MayalsobeusedforSELCALprovisions.Required for ARINC 716 VHF communication only.MPC13 Input Squelch disable Adiscrete input to provide squelch override ordisable capability. Required for ARINC 716 VHFcommunication only.MPD13 NA Squelch disable return A discrete input to provide squelch override ordisable capability. Required for ARINC 716 VHFcommunication only.MPA14 Input Maintenance system ID 0 Identifies CFDS type along with MPC11.MPB14 Input Air/ground discrete Adiscrete input to indicate if the aircraft is in the air oron the ground.Ground/low = airborne.Open/high = on ground.Required for both ARINC 716 VHF communication andARINC 750 VDR; functions are identical.MPC14 Output Data to OMS/CFDS outputPort A A low-speed ARINC 429 output port to one or twoOMS/CFDSs. Required for both ARINC 716 VHFcommunication and ARINC 750 VDR. Functions areidentical.MPD14 Output Data to OMS/CFDS outputPort B A low-speed ARINC 429 output port to one or twoOMS/CFDSs. Required for both ARINC 716 VHFcommunication and ARINC 750 VDR. Functions areidentical.EFFECTIVITYALL 23-20-59 Page 20071 Mar 2011© Honeywell International Inc. Do not copy without express permission of Honeywell.
MAINTENANCE MANUAL965-1696Table 2001. RTA-50D VDR Communications Transceiver Connector Determinants (Cont)Pin No. Type Signal Name FunctionMPA15 Output Audio/side-tone output(high) An analog output for receiver audio during receivemode and side-tone audio during voice transmitmodes. Required for ARINC 716 VHF communicationonly.MPB15 Output Audio/side-tone output(low) An analog output for receiver audio during receivemode and side-tone audio during voice transmitmodes. Required for ARINC 716 VHF communicationonly.MPC15 Output Muting An optional two wire discrete output to provide a switchclosure internal to the VHF communication for externalsystem muting applications during transmit modes.Open = muting off.Ground = muting on.Required for ARINC 716 VHF communication only.MPD15 NA Muting return An optional two wire discrete output to provide a switchclosure internal to the VHF communication for externalsystem muting applications during transmit modes.Open = muting off.Ground = muting on.Required for ARINC 716 VHF communication only.BP1 Input/output Antenna RF input Required for both ARINC 716 VHF communication andARINC 750 VDR; functions are identical.BP2 Input DC power input +27.5VDC Required for both ARINC 716 VHF communication andARINC 750 VDR; functions are identical.BP3 NA Spare NABP4 NA DC power ground Required for both ARINC 716 VHF communication andARINC 750 VDR; functions are identical.BP5 NA Spare NA(2) Reserved and Spare Wires(a) It is not necessary to connect all wires. Wires reserved for optional functions can beselected, which the system does not contain, and deleted. Also decide which futurespare wires to include in the installation. The reserved and spare wires are identified inTable 2001 and in Figure 2001.D. Installation of System (Subtask 23-20-59-000-008-A01)(1) The RTA-50D VDR is secured in the airframe with 3 MCU unit mounts. The mounts aredesigned to be removed without rewiring the connectors. Follow the equipment manufacturer’sinstallation instructions to install the mount into the airframe.(2) To wire the mounts into the system, perform the steps that follow.(a) Remove the mount connector cover and connector plate assembly.EFFECTIVITYALL 23-20-59 Page 20081 Mar 2011© Honeywell International Inc. Do not copy without express permission of Honeywell.
MAINTENANCE MANUAL965-1696(b) Crimp or solder (as applicable) the interconnecting wiring to the appropriate connectorpins.(c) Return the connector plate assembly and cover to their original positions.(3) To install the RTA-50D VDR in the mount, perform the steps that follow.(a) Slide the RTA-50D VDR into the mount until the guide pins are aligned and the electricalconnectors are firmly engaged.(b) Attach the front of the RTA-50D VDR to the mount by tightening the two knurled screwclamps (located on the front of the mount) until they are firmly seated over the hold-downhooks located on the front of the unit.(c) Safety-wire the two screw clamps.7. Inspection and System Check Procedures (TASK 23-20-59-000-806-A01)A. Inspection (Subtask 23-20-59-000-009-A01)(1) Inspection and check procedures for the RTA-50D VDR include checkout of all interfacingunits that can affect performance of the VDR.(2) Table 2002 is a visual inspection check procedure and must be performed after systeminstallation, before system checkout. In addition, the procedure must be used as a periodicinspection check.Table 2002. Inspection/Check ProceduresEquipment Inspection/check Procedure3MCU unit mount As defined by manufacturer’s instructions.RTA-50D VDR 1. Check that unit is fully inserted in mount and that the knurled screwclamps, which attach the unit in the mount, are tight and safety wired.2. Inspect the case for deformation, dents. corrosion, and damage tofinish; make sure that ventilation holes in the unit are not clogged.ARINC 716/750 control panel As defined by manufacturer’s instructions.ARINC 716/750 VHF antenna As defined by manufacturer’s instructions.B. System Checkout (Subtask 23-20-59-000-010-A01)(1) General(a) After installation of the RTA-50D VDR and inspection of the equipment, do a continuity andvisual check of the system interwiring. A post-installation test must then be performed.(2) System Interwiring Check(a) Visually check the system interwiring for abnormalities, such as cables rubbingunprotected metal edges or tightly stretched cables. Check continuity of all interwiring.Specifically check the following:• Check that the RTA-50D VDR is properly installed and the hold-down screw clampsare tight.• Check the wiring harness connectors for security and connection to the RTA-50D VDR.• Check that antenna transmission line connectors are securely fastened.• Check that cables do not interfere with aircraft controls or other equipment.EFFECTIVITYALL 23-20-59 Page 20091 Mar 2011© Honeywell International Inc. Do not copy without express permission of Honeywell.
MAINTENANCE MANUAL965-1696(3) Post-Installation Check(a) Required Test Equipment1Not applicable.(b) System Test1A functional self-test of the LRU can be initiated by pressing the test key push-buttonon the front panel. Refer to Figure 1001.2The result of the functional self-test is displayed on the LEDs located on the frontpanel.3After completion of functional self-test, the RTA-50D VDR status LED must begreen and all other LEDs must be off. For more information, refer to the FAULTISOLATION (PGBLK 23-20-59-1000) section.C. Flight Tests (Subtask 23-20-59-000-011-A01)(1) Preflight Test(a) The following test procedure gives instructions for a preflight test which ensures that theRTA-50D VDR is functioning in an acceptable manner before takeoff.(b) Test Procedure1Establish the initial control settings. Refer to Table 2003.Table 2003. Initial Control SettingsControl Panel PositionPower On.Frequency selector Tune to any local VHF frequency (local control tower or ground controlfrequency).Volume control Midrange.2Use the system headphones (or speaker) and microphone to check operationof the RTA-50D VDR.3Key the microphone and speak into it. Request a radio check and release thePTT button.4As soon as possible, a local flight check must be made to verify system operationfor both local and distant stations.(2) In-Flight Confidence Test(a) After completion of the post-installation and preflight checks, a local flight can be made toverify system operation for both local and distant stations. Repeat the test procedurefound in Paragraph 7.C. (Subtask 23-20-59-000-011-A01)(1)(b).8. Removal and Replacement (TASK 23-20-59-000-807-A01)A. Removal (Subtask 23-20-59-000-012-A01)(1) Loosen the two knurled screw clamps (located on the front of the mount) that attach theRTA-50D VDR to the mount.(2) Gently pull the RTA-50D VDR forward until it is disconnected from the rear connector andthe guide pins.EFFECTIVITYALL 23-20-59 Page 20101 Mar 2011© Honeywell International Inc. Do not copy without express permission of Honeywell.
MAINTENANCE MANUAL965-1696B. Replacement (Subtask 23-20-59-000-013-A01)(1) Slide the RTA-50D VDR onto the tray of the mount and then gently push the RTA-50D VDRuntil the guide pins are aligned and the connectors make a firm connection.(2) Tighten the two knurled screw clamps located on the front of the mount until they are firmlyseated over the hold-down hooks located on the front of the RTA-50D VDR.(3) Safety wire the two knurled screw clamps.9. Maintenance Procedures (TASK 23-20-59-000-808-A01)A. Adjustments and Alignments (Subtask 23-20-59-000-014-A01)(1) There are no adjustments or alignments required for the RTA-50D VDR. All alignment andadjustment procedures are accomplished during bench maintenance. The technician mustremove the unit from the aircraft and reference must be made to the related maintenancemanual when unit performance indicates an adjustment or an alignment is required.B. System Protection (Subtask 23-20-59-000-015-A01)(1) The system must be protected by a 10-AMP circuit breaker located at the circuit breakerpanel in the aircraft.C. Lubrication Practices (Subtask 23-20-59-000-016-A01)(1) There are no requirements for lubrication of any RTA-50D VDR components.D. Cleaning (Subtask 23-20-59-000-017-A01)(1) When deemed necessary, depending on the environment to which the equipment is exposedand the intensity of use, periodic cleaning can be performed. Any dust on the RTA-50DVDR must be wiped off with a lint-free cloth.NOTE: Any cleaning of equipment interiors must be limited to that required whenperforming overhaul (bench-type) work.10. Diagrams (TASK 23-20-59-000-809-A01)A. RTA-50D VDR Diagrams (Subtask 23-20-59-000-018-A01)(1) Diagrams for the RTA-50D VDR are listed in Figure 2001.EFFECTIVITYALL 23-20-59 Page 20111 Mar 2011© Honeywell International Inc. Do not copy without express permission of Honeywell.
MAINTENANCE MANUAL965-1696Blank PageEFFECTIVITYALL 23-20-59 Page 20121 Mar 2011© Honeywell International Inc. Do not copy without express permission of Honeywell.
MAINTENANCE MANUAL965-1696Figure 2001. (Sheet 1 of 4) RTA-50D VDR Detail/Interwiring Diagram (GRAPHIC 23-20-59-99B-814-A01)EFFECTIVITYALL 23-20-59 Pages 2013/20141 Mar 2011© Honeywell International Inc. Do not copy without express permission of Honeywell.
MAINTENANCE MANUAL965-1696Figure 2001. (Sheet 2 of 4) RTA-50D VDR Detail/Interwiring Diagram (GRAPHIC 23-20-59-99B-814-A01)EFFECTIVITYALL 23-20-59 Pages 2015/20161 Mar 2011© Honeywell International Inc. Do not copy without express permission of Honeywell.
MAINTENANCE MANUAL965-1696Figure 2001. (Sheet 3 of 4) RTA-50D VDR Detail/Interwiring Diagram (GRAPHIC 23-20-59-99B-814-A01)EFFECTIVITYALL 23-20-59 Pages 2017/20181 Mar 2011© Honeywell International Inc. Do not copy without express permission of Honeywell.
MAINTENANCE MANUAL965-1696Figure 2001. (Sheet 4 of 4) RTA-50D VDR Detail/Interwiring Diagram (GRAPHIC 23-20-59-99B-814-A01)EFFECTIVITYALL 23-20-59 Pages 2019/20201 Mar 2011© Honeywell International Inc. Do not copy without express permission of Honeywell.

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