Honeywell RTA-44DM2 RTA-44D VHF Data Radio User Manual 1144 1Rev5 1144 1r5frontmatter

Honeywell International Inc. RTA-44D VHF Data Radio 1144 1Rev5 1144 1r5frontmatter

Contents

Users Manual

HoneywellMAINTENANCE MANUALRTA-44D VHF DATA RADIO SYSTEMI.B. 1144-1 23-20-02TO: Holders of RTA-44D VHF Data Radio System Maintenance Manual, I.B. 1144-1.REVISION NO. 5toMAINTENANCE MANUAL, I.B. 1144-1CoveringDate of Original Publication Sep/93Date of Revision No. 1 Jul/95Date of Revision No. 2 Nov/95Date of Revision No. 3 Sep/97Date of Revision No. 4 Feb 01/00Date of Revision No. 5 Mar 01/02INSTRUCTIONS:1. This revision is a completely revised reissue of I.B. 1144-1, which contains the information printed in the original manual and all subsequent revisions. The manual was extensively revised to reflect the latest manufacturing configurations and up-to-date information. 2. Discard the original issue and all previous issues of this publication, and replace with Revision Number 5, dated Mar 01/02.3. A bar in the left-hand column indicates where changes were made in this latest revision.4. Revision stripes are applied where data has changed. 5. Discard this information page after completion.
HoneywellI.B. 1144-1 T-1Sep/93Rev 5: Mar 01/0223-20-02SystemMaintenance ManualRTA-44DVHF Data Radio SystemHoneywellCAGE Code 97896
HoneywellPN-1No Date23-20-02NOTEIF ANY UNUSUAL OR SPECIAL SERVICE PROBLEMS ARISE,CONTACT HONEYWELL AIRLINES AND AVIONICS PRODUCTSCUSTOMER SUPPORT DEPARTMENT.PROPRIETARY NOTICEThis document contains proprietary information and such information may not be disclosed to others for any purpose, nor used for manufac- turing purposes without written permission from Honeywell International, Inc.
HoneywellMAINTENANCE MANUALRTA-44D VHF DATA RADIO SYSTEMI.B. 1144-1 RH-1Mar 01/0223-20-02REVISION NO. 5Mar 01/02REVISION HIGHLIGHTSPages that have been revised are listed below, together with the highlights of the revision. - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - PAGE NUMBER DESCRIPTION OF CHANGET-1 Updated Title Page format to current standards.RH-1/RH-2 Updated Revision Highlights pages for Revision No. 5.LEP-1/LEP-2 Updated "List of Effective Pages" for this revision.1Added reference to Mode 2 functionality of VDR.2Added -2000 and -2051 units to RTA-44D VHF Data Radio SystemComponents table, Figure 2.3Added reference to -2000 and -2051 units in Related Publications table,Figure 4.4Added reference to VDR Mode 2 functionality and made corrections toConfigurations Available table, Figure 5.5Added Mode 2 VDR functionality to RTA-44D VHF Data Radio Features table,Figure 6.6Added VDR Mode 2 units to Leading Particulars listing, Figure 7.7Changed number of pages in Figure 7.8Changed number of pages in Figure 7.8.1 Added 750 Digital Mode to Leading Particulars table, Figure 7.8.2 Added ARINC 429 Input Labels table, Figure 7.18.3/8.4 Added ARINC 429 Output Labels table, Figure 7.29Added -2000 and -2051 units to Environmental Certification table, Figure 8.10 Restructured Paragraph 4 to preserve logical order. Figure 11 moved toFigure 10.11 Restructured Paragraph 4 to preserve logical order. Figure 10 moved toFigure 10.1.12 Restructured Paragraph 4 to preserve logical order. Figure 13 moved toFigure 11. Added VDR Mode 2 to primary modes of operation listing.13 Added Auxiliary Processor Module to System Component Description.14 Added VDR Mode 2 Units (-2000 and -2051) Internal Architecture Diagram,Figure 13. (This replaced old Figure 13, which moved to become 11.)16 Added reference to Production Test Mode (PTM) Tool Quantum Line Tester toI/O Section discussion. Added Basic Theory of Operation of AuxiliaryProcessor Module paragraph.17/18 Adjusted formatting to accommodate added Theory of Operation of AuxiliaryProcessor Module paragraph.
HoneywellMAINTENANCE MANUALRTA-44D VHF DATA RADIO SYSTEMI.B. 1144-1 RH-2Mar 01/0223-20-02101 Added VDR Mode 2 Units, (-2000 and -2051) "Normal Screen" diagram toFigure 101. Corrected screen nomenclature for consistency.102 Updated LCD Control Flow by adding CMU PORT STATUS page to Figure101.1103 Corrected screen nomenclature for consistency.106 Corrected screen nomenclature for consistency.107 Added explanation of numeric/alpha notation to display screens.109 Moved text from page 110 to page 109 to accommodate Figures 114.1 and114.2.110 Added new Failure pages from VDR Mode 2 units (-2000 and -2051), asFigures 114.1 and 114.2. Corrected screen nomenclature for consistency.111 Added "Tuning Port Status Page" Screen for VDR Mode 2 units (-2000 and-2051) as Figure 116.1.112 Added Valid Data Examples of "Tuning Port Status Page" Screen (-2000 and-2051) as Figure 116.2.113 Added "Discrete Input Status Page 4" Screen for VDR Mode 2 units (-2000and -2051) as Figure 119.1.114 Eliminated Figure 122.115 Updated discussion of Previous Flight Legs Failure data. Corrected screennomenclature for consistency. 116 Corrected "Previous Flight Legs Failures Data Page" Screen, Figure 125.202 Added mention of maximum cable loss specification.203 Added mention of ARINC specification for ground path resistance.204 Updated Radio Connector Determinants Table, Figure 201, Sheet 3.205 Updated Radio Connector Determinants Table, Figure 201, Sheet 4206 Updated Radio Connector Determinants Table, Figure 201, Sheet 5207 Updated Radio Connector Determinants Table, Figure 201, Sheet 6209 Added Software On Board Loadable Instructions.210 Added Software On Board Loadable Instructions.211 Added Software On Board Loadable Instructions212 Added Software On Board Loadable Instructions213 Added Software On Board Loadable Instructions214 Added "Normal Mode" Screen for VDR Mod 2 units (-2000 and -2051), Figure203.1.215 Text moved from previous revision to accommodate new data on previouspages and correction to "Test Complete, Failures" Screen, Figure 206 .216 Text moved from previous revision to accommodate new data on previouspages .217/218 Text moved from previous revision to accommodate new data on previouspages and Figure 207 updated.219/220 Text moved from previous revision to accommodate new data on previouspages and Figure 208 updated.
HoneywellMAINTENANCE MANUALRTA-44D VHF DATA RADIO SYSTEM I.B. 1144-1 RR-1No Date23-20-02RECORD OF REVISIONSREV.NO. REVISIONDATE DATEINSERTED BY REV.NO. REVISIONDATE DATEINSERTED BYComplete throughRevision No. 5
HoneywellMAINTENANCE MANUALRTA-44D VHF DATA RADIO SYSTEMI.B. 1144-1 RR-2No Date23-20-02RECORD OF REVISIONSREV.NO. REVISIONDATE DATEINSERTED BY REV.NO. REVISIONDATE DATEINSERTED BY
HoneywellMAINTENANCE MANUALRTA-44D VHF DATA RADIO SYSTEMI.B. 1144-1 RTR-1Mar 01/0223-20-02RECORD OF TEMPORARY REVISIONST.R.NO. DATEDATEINSERTEDBY DATEREMOVEDBYComplete Through Temporary Revision 23-5
HoneywellMAINTENANCE MANUALRTA-44D VHF DATA RADIO SYSTEMI.B. 1144-1 RTR-2Mar 01/0223-20-02RECORD OF TEMPORARY REVISIONST.R.NO. DATE DATEINSERTED BY DATEREMOVED BY
HoneywellMAINTENANCE MANUALRTA-44D VHF DATA RADIO SYSTEMLIST OF EFFECTIVE PAGESI.B. 1144-1 LEP-1/LEP-2Mar 01/0223-20-02Title Page *T-1 Mar 01/02Proprietary PN-1 No DateNoticeRevision *RH-1 Mar 01/02Highlights *RH-2 Mar 01/02Record of RR-1 No DateRevisions RR-2 No DateRecord of RTR-1 Mar 01/02Temporary RTR-2 Mar 01/02RevisionsList of *LEP-1 Mar 01/02Effective LEP-2 BlankPagesTable of TC-1 Mar 01/02Contents TC-2 BlankIntroduction INTRO-1 Mar 01/02Description 0 Mar 01/02and Operation 1 Mar 01/02 *2 Mar 01/02 *3 Mar 01/02 *4 Mar 01/02 *5 Mar 01/02 *6 Mar 01/02 *7 Mar 01/02 *8 Mar 01/02 *8.1 Mar 01/02 *8.2 Mar 01/02 *8.3 Mar 01/02 *8.4 Blank *9 Mar 01/02 *10 Mar 01/02 *11 Mar 01/02 *12 Mar 01/02 *13 Mar 01/02 *14 Mar 01/02 15 Mar 01/02 *16 Mar 01/02 *17 Mar 01/02 18 BlankFault Isolation *101 Mar 01/02 *102 Mar 01/02 *103 Mar 01/02 104 Mar 01/02 105 Mar 01/02 *106 Mar 01/02 *107 Mar 01/02 108 Mar 01/02 *109 Mar 01/02 *110 Mar 01/02 *111 Mar 01/02 *112 Mar 01/02 *113 Mar 01/02 *114 Mar 01/02 *115 Mar 01/02 *116 Mar 01/02Maintenance 201 Mar 01/02Practices *202 Mar 01/02 *203 Mar 01/02 *204 Mar 01/02 *205 Mar 01/02 *206 Mar 01/02 *207 Mar 01/02 208 Mar 01/02 *209 Mar 01/02 *210 Mar 01/02 *211 Mar 01/02 *212 Mar 01/02 *213 Mar 01/02 *214 Mar 01/02 *215 Mar 01/02 *216 Mar 01/02F*217 Mar 01/02F 218 BlankF*219 Mar 01/02F*220 BlankSUBJECT PAGE DATE SUBJECT PAGE DATE
HoneywellMAINTENANCE MANUALRTA-44D VHF DATA RADIO SYSTEMI.B. 1144-1 TC-1/TC-2Mar 01/0223-20-02TABLE OF CONTENTSParagraph/Title PageDESCRIPTION AND OPERATION - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 1FAULT ISOLATION - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 101MAINTENANCE PRACTICES - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 201
HoneywellMAINTENANCE MANUALRTA-44D VHF DATA RADIO SYSTEMI.B. 1144-1 INTRO-1Mar 01/0223-20-02INTRODUCTIONThis manual, I.B. 1144-1 (23-20-02), contains information covering description and operation, installation, and flight-line checkout procedures for the Honeywell International, Airlines and Avionics Products RTA-44D VHF Data Radio System
HoneywellMAINTENANCE MANUALRTA-44D VHF DATA RADIO SYSTEMI.B. 1144-1 Page 0Mar 01/02RTA-44D VHF Data RadioFigure 1
HoneywellMAINTENANCE MANUALRTA-44D VHF DATA RADIO SYSTEMI.B. 1144-1 Page 1Mar 01/0223-20-02 DESCRIPTION AND OPERATION1. GeneralThis section contains descriptive information covering the RTA-44D VHF Data Radio (VDR) System and lists other components required for system operation. The RTA-44D VHF Data Radio (VDR) is illustrated in Figure1.A. Purpose of EquipmentThe RTA-44D VHF Radio (VDR) System is an airborne VHF Communications Transceiver designed to provide voice and data communication between on-board aircraft systems, to other aircraft systems, and to ground-based systems.The VDR is designed to Aeronautical Radio Incorporated (ARINC) 716 Airborne VHF Communications Transceiver and ARINC 750 Airborne VHF Data Radio Specifications, Radio Technical Commission for Aeronautics (RTCA) documents number DO-186a Minimum Operational Performance Standards (MOPS) for Airborne Radio Communications Equipment Operating within the Radio Frequency Range 117.975-137.000Megahertz and number DO-207 MOPS for Devices that Prevent Blocked Channels Used in Two-Way Radio Communications Due to Unintentional Transmissions, and European Organization for Civil Aviation Equipment (EUROCAE) ED-23B Minimum Performance Specification for Airborne VHF Communications Equipment Operating in the Frequency Range 117.975 - 137.000 MHz.The VDR is fully interchangeable with the earlier ARINC716 RTA-44A VHF Communications Transceiver for backward compatibility.In an Aircraft Communications Addressing and Reporting System (ACARS), the VDR is a simple transceiver with an analog interface to the ACARS Management Unit (MU) or a MSK modem.In Mode 2, the VDR contains a D8PSK modem and a digital high speed ARINC 429 link to the MU/CMU/ATSU per Mode 2 functionality in ARINC 750-3.The VDR system requires an antenna for its RF inputs and outputs, a control head or radio management panel, an audio input source and output sink for its analog voice functions, and an ACARS MU, CMU or ATSU for its digital control and data functions. The VDR system may also be connected to a Central Maintenance Computer (CMC) or Central Fault Display System (CFDS) to transfer maintenance data.Depending upon the selected mode, the VDR operates with the following equipment:•an ARINC 597, 724, or 724B ACARS MU,•an ARINC 604 and Airbus Industrie ABD-0048C Centralized Fault Display Interface Unit (CFDIU),•an ARINC 716 voice audio input source and output sink,•an ARINC 716 voice frequency control source,•an ARINC 758 CMU or ATSU.•an antenna.B. Equipment Part NumbersComponents of the RTA-44D VHF Data Radio System supplied by Honeywell are listed in Figure2. The figure lists the currently available components of the system, along with part numbers and equipment type numbers.
I.B. 1144-1 Page 2Mar 01/0223-20-02HoneywellMAINTENANCE MANUALRTA-44D VHF DATA RADIO SYSTEMRTA-44D VHF Data Radio System Components(Honeywell Supplied)Figure 2EQUIPMENTTYPE NUMBER EQUIPMENT DESCRIPTION HoneywellPART NUMBERRTA-44DVHF Data Radio Airborne VHF Data Radio (VDR) capable of VHF COM (ARINC 716, EUROCAE ED-23B) voice and analog data processing through digital signal pro-cessing (DSP) over a frequency range of 118.000 to 136.975MHz with 25-kHz channel spacing. The VDR contains 8.33-kHz channel spacing capability per ARINC716, Supplement 8. VDR is also capa-ble of RTCA DO-207 "stuck mike" detection with-out warning tone. Complies with DO-178B.Capable of interfacing CMC per ARINC 604.064-50000-0101Capable of data recording and loading from the front of the unit, and software loading from the rear connector through an ARINC 615 data loader.The VDR contains an RS-232 port on the front panel for ease of maintenance. Meets DO-160C lightning protection and 200-ms power interrupt transparency requirements. Meets HIRF require-ments and ICAO Annex 10 requirements (RTCA DO-186a).Same as -0101, except added new software to adjust squelch when 8.33-kHz channel spacing is selected.064-50000-0110Same as -0101, except "stuck mike" detection emits a 1-khz interrupted warning sidetone during last five seconds of 35-second transmission.Capable of interfacing CFDS per ARINC 604 and Airbus Industrie ABD-0048C.064-50000-0202Same as -0202, except capable of interfacing CFDS in accordance to McDonnell Douglas soft-ware requirements (replaces ABD-0048C imple-mentation).064-50000-0303Same as -0202, except it adds Mode A functional-ity per ARINC 750-3.064-50000-0505Same as -0110, except it adds Mode A and Mode 2 functionality specified in ARINC 750-3 and meets DO-160D requirements.064-50000-2000Same as -0505, except it adds Mode 2 functionality specified in ARINC 750-3 and meets DO-160D requirements.064-50000-2051
HoneywellMAINTENANCE MANUALRTA-44D VHF DATA RADIO SYSTEMI.B. 1144-1 Page 3Mar 01/0223-20-02C. Equipment Required but Not SuppliedFigure 3 lists equipment required for the RTA-44D VHF Data Radio System, but not supplied by Honeywell.Equipment Required but Not SuppliedFigure 3D. Related PublicationsFigure 4 lists the publications covering the RTA-44D VHF Data Radio and test procedure supporting the system.Related PublicationsFigure 4EQUIPMENT DESCRIPTIONPower Source DC power supply of 27.5 volts. Receive - 1 ampere, Transmit - 7 amperes (at stated input voltage.)Audio Distribution System Audio system with an input impedance of 200 to 10,000 ohms.Control Panel Provides remote control of frequency selection for 25-kHz or 8.33-kHz channel spacing system operation (serial digital, ARINC 429-7 and ARINC 716, Supplement 8), power on/off, volume, and squelch in con-formance to ARINC 716.MU/CMU/ATSU Provides control and data source/sink when operating in the 750 data mode.3 MCU Unit Mount Provides a means of mounting RTA-44D VHF Data Radio in the aircraft.VHF Antenna Capable of receiving and transmitting VHF signals over a frequency range of 118.000 through 136.975 MHz.Microphone 150-ohm impedance microphone (either carbon or transistor) operating from approximately 16-volt power supply.Cables and Connectors Necessary connectors and cables as shown in RTA-44D VHF Data Radio System Interwiring Diagram, Figure 208.PUBLICATIONHoneywelIIDENTIFICATIONNUMBERATAIDENTIFICATIONNUMBERRTA-44D VHF Data RadioPart Numbers 064-50000-0101, -0110 and -2000Component Maintenance ManualI.B. 1144A-2 23-20-36RTA-44D VHF Data RadioPart Numbers 064-50000-0202, -0303, -0505 and -2051 Component Maintenance ManualI.B. 1144A-3 23-20-38
I.B. 1144-1 Page 4Mar 01/0223-20-02HoneywellMAINTENANCE MANUALRTA-44D VHF DATA RADIO SYSTEM2. Configurations AvailableFigure 5 lists the available configurations of the RTA-44D VHF Data Radio and the features contained in each configuration. Figure6 contains a brief description of each feature.1 = Airbus CFDS interface software.2 = McDonnell Douglas CFDS interface software.3 = All -0202 hardware capable. 02/02 software required for squelch adjustment for 8.3-kHz channel spacing.4 =On Board Loadable Dependent.RTA-44D VHF Data Radio, Configurations AvailableFigure 5RTA-44D VHF Data Radio FeaturesFigure 6Sheet 1 of 2HoneywellPART NUMBER 064-50000FEATURESBASIC UNIT FAULT MEMORYSTUCK MIKE ALARMCOMPATIBILITY Mode AMode 2ACARSINTERFACE 8.33-kHz CHANNEL SPACINGBOEINGCMC CFDS-0101 X X X X X-0110 X X X X X-0202 X X X X X1X3-0303 X X X X X2X-0505 X X X X X1X X-2000 X X X X X4X4X X X-2051 X X X X X1X X XFEATURE DESCRIPTIONBasic Unit Airborne solid-state VDR is capable of receiving and transmitting ARINC 716 voice and ARINC 716 data over a frequency range of 118.000 to 136.975MHz with 25-kHz channel spacing. Channel spacing capability of 8.33-kHz per ARINC716, Supplement10 is available as well as RTCA DO-207 "stuckmike" detection. Complies with DO-178B software requirements and enhanced BITE requirements of Airbus, Boeing, and McDonnell Douglas.
HoneywellMAINTENANCE MANUALRTA-44D VHF DATA RADIO SYSTEMI.B. 1144-1 Page 5Mar 01/0223-20-02RTA-44D VHF Data Radio FeaturesFigure 6 (Sheet 2 of 2)FEATURE DESCRIPTIONBasic Unit (Continued)Fault MemoryStuck Microphone AlarmACARS CompatibleCMC InterfaceCFDS InterfaceCapable of data recording and loading from the front of the VDR, and software loading from the rear connector through an ARINC615 data loader. Contains an RS-232 port on the front panel for ease of maintenance. Meets RTCA DO-160C lightning protection and 200ms power interrupt transparency requirements. Meets HIRF requirements and ICAO Annex10 requirements (RTCA DO-186a). Front panel LCD displays unit's characteristics (part number, serial number), BITE status with fault location help pages, line maintenance values with help pages, and software data loading help screens.A nonvolatile, single-chip fault memory that allows the recording of faults associated with a particular flight leg. Sixty-four flight legs are available with each flight leg made up of a flight-leg information header containing a fault record section for recording ten airborne faults and three ground faults. When all flight legs have been used, the oldest flight leg shall be reused.After the VDR detects that the microphone is in the transmit (keyed) position for a time duration longer than 30seconds, a 1kHz interrupted tone (½second on, ½second off) is emitted for five seconds via the audio/sidetone output. After a total of 35seconds, the VDR turns off the transmitter and the 1kHz interrupted sidetone. To reactivate the transmitter, the microphone push-to-talk button must be released and then rekeyed.The VDR ensures proper processing of the ACARS messages.The VDR interfaces fault memory and BITE data between the VDR and line maintenance Centralized Maintenance Computer (CMC) for the purpose of extracting maintenance information and initiating tests. Designed to conform with ARINC 429 interfaces and ARINC 604 requirements.The VDR interfaces fault memory and BITE data between the VDR and line maintenance Centralized Fault Display Interface Unit (CFDIU) for the purpose of extracting maintenance information and initiating tests. Designed to conform with ARINC 429 interfaces, ARINC 604 and Airbus Industrie ABD-0048C or McDonnell Douglas software requirements.8.33-kHz ChannelSpacing Capability The VDR is capable of 8.33-kHz channel spacing to meet the European narrow-band (8.33-kHz) VHF voice communications systems. The narrow-band mode of operation is limited to voice communications.Mode A The Mode A VDR contains an ACARS MSK modem and a digital high speed ARINC 429 link to the MU/CMU/ATSU per the Mode A functionality specified in ARINC 750-3.Mode 2 The Mode 2 VDR contains a D8PSK modem and a digital high speed ARINC 429 link to the MU/CMU/ATSU per Mode 2 functionality in ARINC 750-3. The Mode 2 VDR meets DO-160D requirements.
I.B. 1144-1 Page 6Mar 01/0223-20-02HoneywellMAINTENANCE MANUALRTA-44D VHF DATA RADIO SYSTEM3. System Leading ParticularsA. Unit SpecificationsFigure 7 lists the leading particulars for the RTA-44D VHF Data Radio System.Leading ParticularsFigure 7 (Sheet 1 of 4)CHARACTERISTICS DESCRIPTIONGeneral - Overall VDRForm Factor 3MCU (ARINC600)Dimensions Refer to outline drawing, Figure 207.Weight 9.6 LBS., (4,4Kg) MaximumGeneral - Overall VDRPower Requirements 27.5 Vdc nominal (+10%, -20%)1.0A - Receive (-0101, -0110, -0202, -0303 and -0505)1.5A - Receive (-2000 and -2051)7.0A - Transmit (All Units)TemperatureOperatingStorage-55°C to +70°C (-67°F to +158°F) (-0101, -0110, -0202, -0303 and -0505)-15°C to +70°C (5°F to 158°F) (-2000 and -2051)-65°C to +85°C (-85°F to +185°F) (All Units)Cooling ARINC600Humidity Zero to 95%Altitude To 15,240 meters (50,000feet)Warm-up period None; stable operation after power application.Frequency Control ARINC, 429 Mark, 33 (Serial Digital)Frequency Range 118.000MHz to 136.975MHzChannel Spacing 25-kHz and 8.33-kHzFrequency Stability ±0.0005%Duty Cycle Continuous operation from -55°C to +70°C with ARINC 600 cooling.Certification-0101, -0110, -0202, -0303 and -0505 Units-2000, -2051 UnitsTSO C37d Class3 and 5 and C38d ClassC and E;DO-160C Categories/A2D2/ZCA/MNB/XXXXXXAAAZZUZ/XXE2/XXDO-186a, DO-178B, DO-207 AND EUROCAEED-23BTSO C37d Class3 and 5 and C38d ClassC and E;DO-160D Categories[(A2)(D2)Z]BAB[RB1]XXXXXXZAAZCRRL[A2C2]XXADO-186a, DO-178B, DO-207 AND EUROCAEED-23BGeneral - Analog Voice/Data Channel Changing Time Transmit to Receive RecoveryLess than 50milliseconds to stabilize on a new channel frequency.Less than 50 milliseconds after transmission to provide 90% of its output at an input level of 10 µV modulated 30% at 1000Hz.
HoneywellMAINTENANCE MANUALRTA-44D VHF DATA RADIO SYSTEMI.B. 1144-1 Page 7Mar 01/0223-20-02Leading ParticularsFigure 7 (Sheet 2 of 4)CHARACTERISTICS DESCRIPTIONAnalog Voice Receiver Sensitivity Greater than 6dB SINAD for -107dBm signal modulated 30% at 1000Hz. Selectivity 25-kHz Channel Spacing 8.33-kHz Channel Spacing ±8-kHz at 6dB bandwidth, ±17-kHz at 60dB bandwidth.±2.78-kHz at 6 dB bandwidth, ±7.365-kHz at 60 dB bandwidth.Cross Modulation Meets requirements of ARINC716, Section3.6.4.AGC Within 3dB with inputs from 5µV to 100,000 µV and not more than 6dB with inputs from 5µV to 500,000 µV.Audio Output 40milliwatts maximum into a 600±20% ohm resistive load, factory set at 10mW at 1000 Hz.Audio Output Frequency Response Within 6dB from 300 to 2500Hz.Audio Output Harmonic Distortion Total harmonic distortion will not exceed 5% with 1000µV input signal modulated 30% at 1000Hz.Audio Output Regulation No more than 2dB voltage change from a 10mW reference level into 600ohms for resistive load variations between 450ohms to 2400ohms, and no more than 6dB voltage change for resistive load variations between 200ohms and 20k ohms.Voice Phase Shift Limit Audio output does not depart from that of the positive-going modulation envelope at the receiver input by more than -30° to +120° with a 1000µV input signal modulated 30% at 1000Hz and an output level adjusted for 40milliwatts into a 600-ohm resistive load.Undesired Responses 80 dBInput Impedance 50 ohms, nominalAnalog Voice TransmitterOutput Power 25 watts (nominal)Harmonic and Spurious Emission Any harmonics of the desired frequency is attenuated at least 60dB below the desired carrier level and any other emission will be attenuated at least 118dB below the carrier level.
I.B. 1144-1 Page 8Mar 01/0223-20-02HoneywellMAINTENANCE MANUALRTA-44D VHF DATA RADIO SYSTEMLeading ParticularsFigure 7 (Sheet 3 of 4)CHARACTERISTICS DESCRIPTIONAnalog Voice Transmitter (Con’t)Transmitter Modulation Frequency ResponseFlat within 6dB from 300Hz to 2500Hz.Audio Distortion 6% maximum for 30% modulation and 10%maximum for 90% modulation with a 0.5volt input and a modulating frequency from 300Hz to 2500Hz.Modulation Level 90% modulation minimum for an input level of 0.25volts rms at 1000Hz.Analog Data ReceiverGain SELCAL/Output 0.6volts rms minimum with a 2µV signal modulated 30% at 1000Hz into a 600-ohm load.Frequency Response SELCAL Output±2.5dB from 312Hz to 1200Hz (post detection response with respect to 1000Hz is ±4.5dB from 300Hz to 6600Hz).Distortion SELCAL Output 4.5% maximum with an input signal of 1000µV modulated 30% at 1000Hz and a level adjusted to provide 0.5 volts into a 600-ohm load.AGC Attack Time SELCAL Output Reaches 90% of its steady-state value within 30milliseconds maximum after the step application of an RF carrier of 1000µV modulated 30% at 1000Hz.AGC Decay Time SELCAL Output Reaches 90% of its steady-state value within 45milliseconds maximum after the receiver input of 1000µV modulated 30% at 1000Hz is step reduced to 10µV.Analog Data TransmitterModulation Level Data Input 70% modulation minimum for a frequency of 1000Hz at a -10dBm level.Frequency Response Data Input Flat within 5.5dB from 600Hz to 6600Hz.Distortion Data Input 9.5% maximum distortion at modulation level up to 90% over frequency range of 600Hz to 6600Hz.
HoneywellMAINTENANCE MANUALRTA-44D VHF DATA RADIO SYSTEMI.B. 1144-1 Page 8.1Mar 01/0223-20-02Leading ParticularsFigure 7 (Sheet 4 of 4)CHARACTERISTICS DESCRIPTIONDigital Data Receiver (750 Mode)Sensitivity <0.01 message error rate @ -104 dBm (Mode A)<10-3 Uncorrected BER @ -98 dBm (Mode 2)Dynamic Range Min. -7 dBm.Adjacent Channel Rejection+/-25-kHz+/-50-kHz+/-100-kHz and beyond+44 dBc+50 dBc+60 dBcInterference RejectionOut-of-BandCo-ChannelPer ARINC 750-3, para 4.3.4.3-20 dBc InterfererChannel Sensing Modulated Signal Sensed (Mode A)Carrier Sensed (Mode 2)Digital Data Transmitter (750 Mode)Output Power 25W nominal (Mode A)17.5 +/- 2W (Mode 2)Modulation Type and Data Rate 2400 bps Amplitude Modulated Minimum ShiftKeying, AM-MSK (Mode A)31,500 bps Differential 8-Phase Shift Keying, D8PSK (Mode 2).Duty Cycle 20% as defined in ARINC 750-3 para. 4.2.2Transmitter Emissions (Mode)Adjacent Channel+/- 25kHz (25kHz BW)+/- 25kHz (16kHz BW)+/- 50kHz (25kHz BW)+/- 100kHz (25kHz BW)Wideband Noise+2 dBm-18 dBm-28 dBm-38 dBmDecreases 5 dB/octave from +/-100-kHz to -53 dBm max emission in 25-kHz BW (118-136.975 MHz)Phase/Amplitude Balance (Mode 2)Spurious RadiationTuning TimeTransmitter Ramp-up8% Error Vector MagnitudePer ARINC 750-3 para. 4.2.8.6100 ms2 ms for Pre-key (Mode A)reaches 90% at least 3 symbols prior to Preamble (Mode 2)Data Clock Stability 0.005%
HoneywellMAINTENANCE MANUALRTA-44D VHF DATA RADIO SYSTEMI.B. 1144-1 Page 8.2Mar 01/0223-20-02VDR ARINC 429 Input LabelsFigure 7.1429 INPUT LABEL RATE DESCRIPTIONTuning Bus A and B (Low Speed)030047276200 ms200 ms500 msTuning Frequency 25-kHzTuning Frequency 8.33-kHzVoice/Data IndicationCMU Input Bus 1 and 2 (High Speed)(-0505, -2000, -2051)270 1 second CMU Status Word250, 251, 252, 253 (When Own Aircraft SDI is 0, 1, 2, or 3 respectivelyWhenever Data availableCMU Solo words and BOP filesData Loader Input Bus (High Speed)251 Follows ARINC 615 protocolARINC 615 Data loaderCMC Data Input Bus 1 and 2 (Low Speed)0400410421251261551 1561 1571 2272332342352362372602612 301302303304NOTES:1 For Airbus Only (-0202, -0505, -2051)2 For McDonnell Douglas Only (-0303)1 second (+.5)1 second (+.5)1 second (+.5)1 second (+.5)1 second (+.5)1 second (+.5) 1 second (+.5) 1 second (+.5) 1 second (+.5)1 second (+.5)1 second (+.5)1 second (+.5)1 second (+.5)1 second (+.5)1 second (+.5)1 second (+.5) 1 second (+.5)1 second (+.5)1 second (+.5)1 second (+.5)City Pair 1City Pair 2City Pair 3UTCFlight PhaseAircraft Configuration 1 Aircraft Configuration 2 Aircraft Configuration 3 Command WordFlight Number 1Flight Number 2Flight Number 3Flight Number 4Flight Number 5DateFlight Number Aircraft ID 1Aircraft ID 2Aircraft ID 3Aircraft ID 4
HoneywellMAINTENANCE MANUALRTA-44D VHF DATA RADIO SYSTEMI.B. 1144-1 Page 8.3/8.4Mar 01/02VDR ARINC 429 Output LabelsFigure 7.2429 OUTPUT LABEL RATE DESCRIPTIONCMU Output Bus (High Speed)(-0505, -2000, -2051)270 1 second VDR Status Word172 1 second System Address Label377 1 second Equipment Identifier304 Whenever data to send to CMU VDR Solo words and BOP FilesData Loader Output Bus (High Speed)226 Follows ARINC 615 protocolARINC 615 Data LoaderCMC Output Bus (Low Speed)350 750 ms Fault Summary Word354 50 ms to 250 ms LRU Identification (P/N and S/N)356 50 ms to 250 ms3 ms and 3 seconds max.ISO 5 Fault MessageNormal ModeInteractive Mode377 1 second maximum ARINC 429 Equipment Identification
I.B. 1144-1 Page 9Mar 01/0223-20-02HoneywellMAINTENANCE MANUALRTA-44D VHF DATA RADIO SYSTEMB. Environmental CertificationThe RTA-44D VHF Data Radio meets the environmental conditions of the Radio Technical Commission for Aeronautics (RTCA) document number DO-160C (DO-160D for -2000 and -2051), "Environmental Conditions and Test Procedures for Airline Electronic/Electronical Equipment and Instruments". The environmental certification categories of the VDR, P/N 064-50000-0101, -0110, -0202, -0303 and -0505, are: /A2D2/ZCA/MNB/XXXXXXAAAZZUZ/XXE2/XX.The environmental certification categories of the VDR, P/N 064-50000-2000 and -2051 are: [(A2)(D2)Z]BAB[RB1]XXXXXXZAAZCRRL[A2C2]XXA. Environmental Certification Categories of RTA-44DFigure 8TEST CATEGORY FOR UNITS P/N 064-50000-0101, -0110, -0202, -0303, -0505 -2000, -2051Temperature and Altitude A2D2 A2D2In-Flight Loss of Cooling Z ZTemperature Variation CBHumidity A AOperational Shocks and Crash Safety Meets Specification BVibration MNB RB1Explosion Proofness X XWaterproofness X XFluids and Susceptibility X XSand and Dust X XFungus Resistance X XSalt Spray X XMagnetic Effect AZPower Input A AVoltage Spike A AAudio Frequency Conducted Susceptibility - Power Inputs Z ZInduced Signal Susceptibility ZCRadio Frequency Susceptibility (Radiated and Conducted) U RREmission of Radio Frequency Energy ZLLightning Induced Transient Susceptibility XXE2 A2C2Lightning Direct Effects X XIcing X XElectrostatic Discharge A
HoneywellMAINTENANCE MANUALRTA-44D VHF DATA RADIO SYSTEMI.B. 1144-1 Page 10Mar 01/0223-20-024. System DescriptionFigure 9 Deleted by Revision 3A. VDR SystemThe VDR system consists of an antenna for its rf inputs and outputs, a control head or radio management panel (RMP) (refer to Figure 10) and an audio input source and output sink for its analog voice functions. The VDR system may also be connected to a Central Maintenance Computer (CMC) or Centralized Fault Display System (CFDS) to transfer maintenance data.VHF Communications for Voice OperationFigure 10There are four primary modes of operation in the VDR system:•ARINC 716 voice compatibility mode, 25-kHz or 8.33-kHz channel spacing,•ARINC 716 data compatibility mode.•ARINC 750 Mode A•ARINC 750 Mode 2
I.B. 1144-1 Page 11Mar 01/0223-20-02HoneywellMAINTENANCE MANUALRTA-44D VHF DATA RADIO SYSTEMThe ARINC 716 voice and data modes emulate the current ARINC 716 radio functions found in the previous RTA-44A VHF Transceiver System.B. ARINC 716 Data ModeIn ACARS, the VDR system is a simple transceiver with an analog interface to the ACARS Management Unit (MU) (refer to Figure 10.1).ACARS Audio InterfaceFigure 10.1
HoneywellMAINTENANCE MANUALRTA-44D VHF DATA RADIO SYSTEMI.B. 1144-1 Page 12Mar 01/0223-20-02C. ARINC 750 Modes A and 2Figure 11 illustrates the same interfaces when the radio is operating in ARINC 750 Mode with a compatible CMU, ACARS MU, or ATSU. This wiring configuration would be used for Mode A and Mode 2 operation. The Mode A and Mode 2 VDR can be installed in an ARINC 716 configuration, if Mode A and Mode 2 operation is not required.RTA-44D External Interfaces (ARINC 750 Mode)Figure 11
I.B. 1144-1 Page 13Mar 01/0223-20-02HoneywellMAINTENANCE MANUALRTA-44D VHF DATA RADIO SYSTEM5. System Component DescriptionA. RTA-44D VHF Data RadioThe VDR is a VHF transmitter-receiver that provides modulation for double-sideband amplitude modulation for analog voice/data operation in the 25-kHz or 8.33-kHz spaced channels from 118.000MHz to 136.975MHz. Frequency selection is provided through a serial-digital format in accordance with ARINC Specification 429.The VDR is completely solid state and is housed in an ARINC 3-MCU case per ARINC Specification600. A handle is located on the front panel of the VDR to facilitate installation, removal, and transport of the VDR.The VDR uses a low insertion force, size one shell ARINC600 rear panel connector with two inserts. The middle insert is used for aircraft interconnections and the bottom insert is used for input power and coaxial antenna connectors. The keying pins are set to index pin code "04".Forced air cooling, in accordance with ARINC specification 600, is required for cooling the VDR.For maintenance purposes, a microphone jack and headphone jack are provided on the front panel of the VDR. A front panel display provides an interface to an operator via a liquid crystal display (LCD) that is visible from the front of the VDR to display messages in simple language in one of four modes: normal operation, BITE display, maintenance, and software loading.Software loading and data recording of data to/from the CPU is via the front panel Personal Computer Memory Card International Association (PCMCIA) slot. Intel Series 1 Flash Cards with capabilities ranging from 1 up to 64 megabytes are supported.Two pushbutton switches allow operator interface with the VDR LCD.In normal operation, the front panel LCD displays the unit's characteristics: unit identification, part number, and serial number. The BITE display mode is activated after manual self-test has been exercised either from the front panel test pushbutton or remotely. In the BITE mode, BITE status is reported and in the event of a detected failure, additional help screens are provided to locate the detected failure to a module. BITE help pages are provided. In the maintenance mode, a set of maintenance words are displayed and decoded showing the names of data fields and the value of the data. Maintenance help pages are provided. For loading software, a series of screens direct the operator during the data loading process. Software version and loading status are provided during the update process.The VDR is partitioned into six subassemblies: RF Module, Main Processor Module, HIRF/Interconnect Module, Power Supply Assembly, Display Assembly, and Flash Card Memory Module (refer to Figure12). An Auxiliary Processor Module was added for ARINC 750 Mode 2 (-2000, -2051) operation (refer to Figure 13).B. Other Components in the SystemOther VDR system components are not supplied by Honeywell AIrlines and Avionics Products. Information on these units must be obtained from their respective manufacturers.
HoneywellMAINTENANCE MANUALRTA-44D VHF DATA RADIO SYSTEMI.B. 1144-1 Page 14Mar 01/0223-20-02RTA-44D VHF Data Radio, Simplified Block DiagramFigure 12RTA-44D Internal Architecture (-2000, -2051)Figure 13
I.B. 1144-1 Page 15Mar 01/0223-20-02HoneywellMAINTENANCE MANUALRTA-44D VHF DATA RADIO SYSTEM6. OperationA. GeneralOperation of the VDR is either controlled by a control unit (for voice operation) which provides squelch threshold and operating frequency or by the MU or data operation.The VDR has two basic areas of operation: as a standard double sideband AM analog voice transceiver and as a data-capable transceiver. Depending on the selected data mode, the VDR performs transceiver, modem, and/or link layer functions.In an AVPAC system, the VDR is either a simple transceiver with an analog interface or a link layer bridge for the subnetwork. In an ACARS system, the VDR is either a simple transceiver with analog interface to the ACARS Management Unit or a MSK modem.Three modes of operation are available: ARINC716 voice mode compatibility, ARINC716 data mode compatibility, and ARINC750 data mode. The ARINC 716 voice and data modes emulate the current ARINC716 radio functions. While in the ARINC750 data mode, the VDR bridges ACARS traffic between the MU/VDR digital bus and its internal 2.4 Kbps MSK modem or bridge AVPAC traffic between the MU/VDR digital bus and its 2.4 Kbps MSK modem or its 31.5Kbps DPSK modems.The ARINC716 voice mode is the basic VHF communications transceiver compatible voice mode defined in ARINC716 and retained for backward compatibility. Voice signals are provided via normal audio I/O, with transmit and receive conditions initiated by the operator with the microphone. The RF signal in space is a double sideband amplitude modulation. Tuning/frequency selection is made by low-speed ARINC429 data words from an associated radio control panel.The ARINC716 data mode is the basic VHF communications transceiver compatible data mode defined in ARINC716 and retained for backward compatibility. Data is transferred via analog discrete methods using two conductor twisted pairs. Tuning data is provided via a low-speed ARINC429 data bus, while transmit/receive commands are discrete digital signals from the management unit. Operating air/ground protocols are either ARINC618 (ACARS) or ARINC631 (AVPAC).When in the ARINC750 data mode, both tuning and digital data is received over a high-speed ARINC429 port. While in the ARINC750 mode, the management unit (MU) may command the VDR to operate as either an ACARS MAC bridge or as an AVPAC link layer bridge. While in this mode, the data rate and modulation scheme is determined by the management unit.B. Basic Theory(1) RF ModuleWhen receiving, the VDR RF Module amplifies and converts the RF signals received by the antenna into analog signals for processing by the digital-signal processor (DSP) section of the main processor module. Conversely, when transmitting, the RF Module modulates the analog signals provided by the DSP section into RF signals for transmission through the antenna.(2) Main Processor ModuleThe Main Processor controls the VDR’s mode of operation, the aircraft interfaces, and the data displayed on the front panel. In the receive mode, the Main Processor Module processes the analog signals from the RF Module and generates the voice and MSK audio output when in the ARINC 716 voice or data mode. In the transmit mode, the Main Processor Module processes the voice and MSK audio inputs when in the ARINC 716 voice and data modes, and generates analog signals to the RF Module.(a) DSP SectionThe DSP section is used to process the analog outputs from the RF Module and to generate some of the control signals to the RF Module for transmit modulation, automatic gain control, and test signals.The receiver 455-kHz I-F from the RF Module is digitized using an A/D converter. The A/D converter is also used to monitor signals from the BITE test points on the RF Module and
HoneywellMAINTENANCE MANUALRTA-44D VHF DATA RADIO SYSTEMI.B. 1144-1 Page 16Mar 01/0223-20-02the power supply voltages. The digitized data from the A/D converter is stored in a FIFO which is accessed by the DSP.A D/A converter routes the DSP generated AGC and test control signals to the RF Module. A second D/A converter provides the audio outputs which are amplified to provide up to 40milliwatts into a load ranging from 200ohms to 600ohms.Data is exchanged with the CPU section through a dual-port RAM (random access memory) providing maximum throughput of both processors.(b) CPU SectionThe CPU section is used to process the data from the DSP section, to provide information to the front panel display, and to provide the data and control signals to the I/O section.The microprocessor in the CPU section controls all major functions to the VDR. Programmable logic devices serve as the microprocessor controller and provide the interfaces to the memory devices (boot routine, program, fault, and data), the data recorder/data loader flash card, and the front panel display driver.Data is exchanged with the DSP section through a dual-port RAM.(c) I/O SectionThe I/O section provides the interfaces with other aircraft systems including the ACARS Management Unit (MU), Central Maintenance Computer (CMC), Data Loader, control panels, and displays.ARINC 429 inputs from the tuning control panels, data loader, and CMC are processed by the ARINC 429 LSIs. These LSIs also provide the ARINC 429 data loader, and CMC outputs. External buffers are used to satisfy the ARINC429 characteristics for the transmitters.All discrete inputs and outputs external to the VDR are processed by discrete components and digital latches.The I/O section also contains an RS-232C test interface. This test interface is also used to update serial number, part number and memory configuration, as applicable, utilizing the stand alone version of the Production Test Mode (PTM) Tool or PTM utility in the RTS software when the Main Processor Module is replaced.(3) Auxiliary Processor ModuleThe Auxiliary Module’s DSP communicates with the Main Processor’s TMS320C31 via a single, bi-directional, on-chip serial port. 84-kHz sampled RF receiver data are transferred serially from the Main Processor’s DSP to the Auxiliary Processor’s DSP to be processed. The Auxiliary Module’s higher performance TMS320VC33 DSP is then used to perform decimation, frequency correction, symbol synchronization, equalization, time tracking, D8PSK symbol decoding, descrambling, de-interleaving, RS block error correction, flag and bit removal, transmission header decoding, preamble detection, frequency error estimation and symbol timing estimation.(4) Power Supply ModuleThe 27.5 volts dc aircraft power is converted by the Power Supply Module into the dc operating voltages required by the various modules within the VDR. A self-contained, high efficiency switching power supply is used to minimize power dissipation.(5) HIRF/Rear InterconnectTo prevent High Intensity Radiation Fields (HIRF) or lightning from affecting operation by entering via rear connector cables, a HIRF compartment is formed in the rear of the VDR. The signal and power cables are filtered by using discrete and distributed filter elements and limiting devices on
HoneywellMAINTENANCE MANUALRTA-44D VHF DATA RADIO SYSTEMI.B. 1144-1 Page 17/18Mar 01/0223-20-02the Rear Interconnect Module located inside this HIRF compartment. The filtered lines are then fed to the appropriate points in the VDR.The VDR is packaged in an aluminum casting. This seamless main frame ensures HIRF cannot enter the unit through structural seams. The slots formed by the removable side covers are sealed against HIRF with protective gaskets and metal covers.(6) Front Panel Display AssemblyThe Front Panel Display Module is mounted behind the front panel and provides an interface to an operator via a low-power liquid crystal display (LCD) that is visible from the front of the VDR. In addition to the LCD, the module contains "Light Pipe" backlighting, temperature compensation circuitry, and a PC board containing an associated LCD driver, two pushbutton switches, and a D-sub, nine-pin, RS-232 serial type connector.The LCD is a bit-mapped display capable of displaying alphanumeric and graphical symbols. Simple messages written in plain language minimize the potential for misunderstanding or incorrect interpretation. The LCD displays the following:•Part Number/Software Identification,•Status,•Results of Level 1 BITE Tests,•Maintenance Help Pages,•Shop Maintenance Data,•Flight Fault Memory Contents,•Software Loading Status(7) Memory Card Interface ModuleThe Memory Card Interface Module is used to load software program data into the CPU or record software program data from the CPU. The Memory Card Interface Module supports Series 2 FLASH cards via the front panel Personal Computer Memory Card International Association (PCMCIA) slot. Cards with the capabilities ranging from 1 up to 64 megabytes are supported. The FLASH card is inserted through the front panel. In one mode, data stored on the flash card memory module is used to update program or data memory in the VDR. In another mode, the flash card memory module functions as a data recorder.
I.B. 1144-1 Page 101Mar 01/0223-20-02HoneywellMAINTENANCE MANUALRTA-44D VHF DATA RADIO SYSTEMFAULT ISOLATION1. GeneralFault isolation is the process of isolating the source of a system failure to an LRU (line replaceable unit) or to the aircraft wiring.Fault isolation in the RTA-44D VHF Data Radio System includes a continuity check of the interwiring, and the assurance that proper installation techniques and procedures have been followed.A functional self test of the LRU may be initiated by pressing the "test" key pushbutton switch as designated on the front panel LCD (Figure 101). Although the "Normal Mode" Screen indicates that this is actuated from the right key, the left key has the same function if pressed while the VDR LCD is in its Normal Mode.Typical "Normal Mode" Screen (-0101, -0110, -0202, -0303 and -0505)NOTE: "Wrong AC Type" appears only if discretes are not correct at MP-C11 and MP-A14 - see Figure 208 . Typical "Normal Mode" Screen (-2000 and -2051)Figure 101Figure 101.1 illustrates the control flow of the LCD screens (except for the data loading and data recording screens).A complete functional test of the system can be performed as described in paragraph 7.B. in "Maintenance Practices" Section 200 of this manual.VHFDATARADIOP/N:064-50000-0101S/W:01/0 1PUSHTO↓TEST↓VD RPN:064-50000-2000SW:998-2858501WRONGACTYPEPUSHTO↓TEST↓11
HoneywellMAINTENANCE MANUALRTA-44D VHF DATA RADIO SYSTEMI.B. 1144-1 Page 102Mar 01/0223-20-02LCD Control FlowFigure 101.1
I.B. 1144-1 Page 103Mar 01/0223-20-02HoneywellMAINTENANCE MANUALRTA-44D VHF DATA RADIO SYSTEM2. Self-Test ModeThe Self-Test Mode starts by displaying the "Test in Progress" Screen (Figure 102) one second after pressing the "test" key. This is displayed for four seconds with a moving thermometer along the bottom of the LCD indicating the progress of the test from one to five seconds."Test in Progress" ScreenFigure 102The "Normal Mode" Screen (Figure 101) is displayed for the first second of the test sequence.Once complete, the "Test Complete, No Failures" Screen is displayed (Figure 103), or the "Test Complete, Failures" Screen is displayed (Figure 104). Both screens contain two key selections each: "MAINT" and "RETURN" or "MAINT" and "WHY?", respectively.•"MAINT" -For both screens, "MAINT" is located on the left key. This allows the initiation of the extended maintenance pages of the system for troubleshooting. Refer to paragraph 4.•"RETURN" -In the "Test Complete, No Failures" Screen, the "RETURN" key to the right returns the system to its "Normal Mode" Screen (Figure101).•"WHY?" -In the "Test Complete, Failures" Screen, the "WHY?" key to the right puts the system into the Display-Failures Mode where individual system failures are displayed one per page. Refer to paragraph 3.While in the Self-Test Mode, not pressing either key for five minutes causes the system to return to the "Normal Mode" Screen (Figure101).VHFDATARADIOTESTINPROGRESS0 5 0 1 0 0XXXXXXXXXXX
HoneywellMAINTENANCE MANUALRTA-44D VHF DATA RADIO SYSTEMI.B. 1144-1 Page 104Mar 01/0223-20-02"Test Complete, No Failures" ScreenFigure 103"Test Complete, Failures" ScreenFigure 104VHFDATARADIOTESTCOMPLETENOFAILURE SMAINTRETURNVHFDATARADIOTESTCOMPLETEFAILURES-↓MAINTWHY?
I.B. 1144-1 Page 105Mar 01/0223-20-02HoneywellMAINTENANCE MANUALRTA-44D VHF DATA RADIO SYSTEM3. Display-Failures ModeOne of three failure possibilities exist: the VDR is okay, but there are external failures (Figure 105), the VDR failed and there are external failures (Figure 106), and the VDR failed, but there are no external failures (Figure 107)."VHF Data Radio OK, External Failures Present" ScreenFigure 105"VHF Data Radio Failed, External Failures Present" ScreenFigure 106VHFDATARADIO-OK--------------EXTERNALFAILURES-PRESENT↓RETURN MOREVHFDATARADIOFAILED-------------EXTERNALFAILURES-PRESENT↓RETURN MORE
HoneywellMAINTENANCE MANUALRTA-44D VHF DATA RADIO SYSTEMI.B. 1144-1 Page 106Mar 01/0223-20-02"VHF Data Radio Failed, External Failures Not Present" ScreenFigure 107All "Display-Failures Mode" Screens have the "MORE" selection on the right key. The only exception is when there is only one failure page. This only happens when the VDR itself has failed and no other external failure exists (Figure 107).•"MORE" -Pressing this key cycles through all of the failures present. When on the last page, the "MORE" key causes a return to the first displayed failure page (Figure105 or 106).All "Display-Failures Mode" Screens have the "RETURN" selection on the left key.•"RETURN" -Pressing this key causes the system to return to the "Normal Mode" Screen (Figure 101).While in the Display-Failures Mode, not pressing either key for five minutes causes the system to return to the "Normal Mode" Screen (Figure 101).VHFDATARADIOFAILEDRETURN
I.B. 1144-1 Page 107Mar 01/0223-20-02HoneywellMAINTENANCE MANUALRTA-44D VHF DATA RADIO SYSTEMNOTE: Designation of pin names can be shown with numeric/alpha position in either format ANN or NNA, e.g. MP-11A is equivalent to MP-A11."Tuning Port A Failure" ScreenFigure 108"Tuning Port B Failure" ScreenFigure 109TUNINGPORT AIS SELECTEDTUNINGPORTAMISSINGINPUTP#MP-11A/11BRETURN MORECMCPORT# 1MISSINGINPUTP#MP-6A/6BRETURN MORE
HoneywellMAINTENANCE MANUALRTA-44D VHF DATA RADIO SYSTEMI.B. 1144-1 Page 108Mar 01/0223-20-02Figure 110 deleted by Revision No. 4"SDI 0 Program Pin Failure" ScreenFigure 111SDI0PROGRAMPINSHORTEDTOGROUNDP#MP-9ARETURN MORE
I.B. 1144-1 Page 109Mar 01/0223-20-02HoneywellMAINTENANCE MANUALRTA-44D VHF DATA RADIO SYSTEM"SDI 1 Program pin Failure" ScreenFigure 112"CMC Port #1 Failure" ScreenFigure 113"CMC Port#2 Failure" ScreenFigure 114SDI1PROGRAMPINSHORTEDTOGROUNDP#MP-9BRETURN MORECMCPORT# 1MISSINGINPUTP#MP-6A/6BRETURN MORECMCPORT# 2MISSINGINPUTP#MP-6C/6DRETURN MORE
HoneywellMAINTENANCE MANUALRTA-44D VHF DATA RADIO SYSTEMI.B. 1144-1 Page 110Mar 01/0223-20-02"CMU/ATSU Failure Page" Screen (-2000 and -2051)Figure 114.1"LGCIU Failure Page" Screen (-2000 and -2051)Figure 114.24. Maintenance ModeThe Maintenance Mode is entered from either one of the two "Test Complete" Screens (Figures 103 or 104). The Maintenance Mode allows troubleshooting of all components of the VDR system, both internal and external.All pages have the "MORE" selection on the right key.•"MORE" -Pressing this key cycles through all of the maintenance pages. When on the last page, the "MORE" key causes a return to the first displayed maintenance screen.All pages have the "RETURN" selection on the left key.•"RETURN" -Pressing this key causes the system to return to the "Normal Mode" Screen (Figure 101).There is no timeout in the Maintenance Mode when the aircraft is on the ground. But while in the air, not pressing a key for five minutes causes the system to return to the "Normal Mode" Screen (Figure 101).Figures 115 through 122 show typical Maintenance Mode Pages that may be encountered.CMU/ATSU PORTMISSINGINPUTP#MP-12A/12BORP#MP-12C/12DRETURN MORELGCIU-A/G MISMATCH P#MP-14B AN DCMC LABEL 227RETURN MORE
I.B. 1144-1 Page 111Mar 01/0223-20-02HoneywellMAINTENANCE MANUALRTA-44D VHF DATA RADIO SYSTEMNOTE: The "Status" field displays "FAILED" if either an external or an internal failure is detected."VDR Unit Status (OK, Failed)" ScreenFigure 115"Tuning Port Status (NORM, FAIL, TEST, NCD, NODAT)" ScreenFigure 116"Tuning Port Status Page" Screen (-2000 and -2051)Figure 116.1VHFDATARADIOSTATUS:OKFAULT CODE:X XRETURN MORETUNINGPORTXSELECTEDPORTX S TATUSNORM131.550RETURN MORETUNING/STATUSSTATE:SSTATEFREQ:FRE.QUEPORT:X STATSCMU: CMUSM2CH:CHSTATVSWR:SWR:1RETURN MORE
HoneywellMAINTENANCE MANUALRTA-44D VHF DATA RADIO SYSTEMI.B. 1144-1 Page 112Mar 01/0223-20-02NOTE: See ARINC 750 specification for data definitions.Valid Data Field Examples of "Tuning Port Status Page " Screen (-2000 and -2051)Figure 116.2"Discrete Input Status Page 1 (OPEN, GRND)" ScreenFigure 117"Discrete Input Status Page 2 (OPEN, GRND)" ScreenFigure 118VARIABLE FIELD VALID DATASSTATE BERTM (S0) 716VP (S3)716DB (S6)750DSA (S7-A)716VN (S1 716DP (S4)750DN (S7-N)750DR2 (S7-R2)716DM (S2) 716VB (S5)750DRA (S7-RA)750DS2 (S7-2)FRE.QUE Operating Frequency (e.g. 131.550)XA, BSTATS NORM, TEST, NCD, NODATCMUS NULL, CMU1, CMU2CHSTAT N/A, TX. RXBUSY, RXIDLEDISCRETE S 1PUSHT T :OPENP#MP-1CDATA KEY:GRNDP#MP-7DVCE/DATA:OPENP#MP-7CRETURN MOREDISCRETE S 2AIR/GRND:OPENP#MP-14BSQLCH DS:OPENP#MP-13CFREQ O FF:OPENP#MP-8CRETURN MORE
I.B. 1144-1 Page 113Mar 01/0223-20-02HoneywellMAINTENANCE MANUALRTA-44D VHF DATA RADIO SYSTEM"Discrete Input Status Page 3 (OPEN, GRND)" ScreenFigure 119"Discrete Input Status Page 4 (OPEN, GRND)" Screen (-2000 and -2051)Figure 119.1"SDI Program Pin Status Page (OPEN, COMM)" ScreenFigure 120DISCRETE S 3TXCTOFF:GRNDP#MP-2AFCT T EST:OPENP#MP-4ADLD R ENB:OPENP#MP-8BRETURN MOREDISCRETES 4BER TEST:GRNDP#MP-9DM0M1:OPENGRNDP#MP14A MP11CANT MON: OPENP3MP-8ARETURN MORESDIPRO G PINSSDI0:OPENP#MP-9ASDI1:COM MP#MP-9BCOMM:P#MP-9CRETURN MORE
HoneywellMAINTENANCE MANUALRTA-44D VHF DATA RADIO SYSTEMI.B. 1144-1 Page 114Mar 01/0223-20-02"CMC Port Status (ACTIVE, INACTIVE)" ScreenFigure 121Figure 122 is eliminated by Revision 5 of this Maintenance Manual.CMC#XSELECTEDCMC1:ACTIV EP#MP-6A/6BCMC2:INACTIV EP#MP-6C/6DRETURN MORE
I.B. 1144-1 Page 115Mar 01/0223-20-02HoneywellMAINTENANCE MANUALRTA-44D VHF DATA RADIO SYSTEM5. Flight Fault Memory ModeWhen the Flight-Fault Memory contains failures from previous flight legs, an "Old Failures" Screen (Figure 123) is presented as the last page of the Maintenance Mode Screens. This page allows the viewing of previous flight leg failures, one flight leg at a time by pressing the "YES" key. Pressing the "MORE" key from this page bypasses this function and returns the system back to the first page of the maintenance data.Once in the Flight-Fault Memory Mode, flight legs are displayed from the most recent, backwards. The VDR stores up to 10 "in air" failures and up to 3 "on ground" failures per flight leg, there will be up to four pages displayed on the LCD. There are over 120 different fault codes that can be stored for each of the 13 failures. These are described in the Component Maintenance Manuals (CMM) I.B. 1144A-2 (23-20-36) and I.B.1144A-3 (23-20-38), in the "Testing and Troubleshooting" Section.The first page of each flight leg contains the date, flight number, aircraft number, and departure/destination stations, as shown in the "Previous Flight Legs Failures First Page" Screen (Figure 124). The second page displays failures 1-5, the third page displays failures 6-10 and the fourth page displays failures 11-13, as shown in the "Previous Flight Legs Data Page" Screens (Figure 125).All flight fault memory pages have the "MORE" selection on the right key.•"MORE" -Pressing the key cycles through all of the Flight-Fault Memory pages. When on the last page, the "MORE" key causes a return to the first page.All flight fault memory pages have the "RETURN" selection on the left key.•"RETURN" -Pressing this key causes the system to return to Normal Mode Screen (Figure 101).There is no timeout in this mode when the aircraft is on the ground. But, while in the air, not pressing a key for five minutes causes the system to return to the "Normal Mode" Screen (Figure 101)."Old Failures Page" Screen"Previous Flight Legs Failures First Page" ScreenFigure 123FAILURE S HAVEBEEN R ECORDEDFORPREVIOUSFLIGHTLEGS_YES TOVIEW_MORETOSKIPYES MORE
HoneywellMAINTENANCE MANUALRTA-44D VHF DATA RADIO SYSTEMI.B. 1144-1 Page 116Mar 01/0223-20-02"Previous Flight Legs Failures First Page" ScreenFigure 124NOTE: "FC" is fault code, "UTC" is time, "R" is repetition count, "P" is phase, "O" is origin."Previous Flight Legs Failures Data Page" Screen(Three Screens per Flight Leg)Figure 125All "Display-Failures Mode" Screens have the "RETURN" selection on the left key.•"RETURN" -Pressing this key causes the system to return to the "Normal Mode" Screen (Figure 101).While in the Display-Failures Mode, not pressing either key for five minutes causes the system to return to the "Normal Mode" Screen (Figure101).FLIGHTLEG:X XDATE:MMMD DDEPT:X X X XDEST:X X X XF#:XXXXXXXXXXA/C:XXXXXXXRETURN MOREFLIGHTLEG:X XFC U TC R PO00 0000 00000 0000 00000 0000 00000 0000 00000 0000 000RETURN MORE
I.B. 1144-1 Page 201Mar 01/0223-20-02HoneywellMAINTENANCE MANUALRTA-44D VHF DATA RADIO SYSTEMMAINTENANCE PRACTICES1. GeneralThis section of the manual provides service personnel with installation and maintenance information for the RTA-44D VHF Data Radio (VDR) System. Installation instructions are supported by mechanical outline drawings and a electrical interconnection diagram. These drawings, located at the back of this section, should be reviewed by the installer, and requirements peculiar to the airframe should be established before starting the installation.2. Inspection After UnpackingCAUTION: THIS EQUIPMENT CONTAINS ELECTROSTATIC DISCHARGE SENSITIVE (ESDS) DEVICES. EQUIPMENT, MODULES, AND ESDS DEVICES MUST BE HANDLED WITH APPROPRIATE PRECAUTIONS.Visually inspect the RTA-44D VHF Data Radio System and all associated equipments for possible damage which may have occurred during shipment. Inspect for dents, deep abrasions, chipped paint, etc. If any equipment is damaged, notify the transportation carrier immediately.A Honeywell Airlines and Avionics Products test and inspection record and quality report tag is included with each shipped unit. This ensures the customer that the necessary production tests and inspection operations have been performed on that particular unit.One copy of the report tag is affixed to each unit by the first assembly inspector. As the unit proceeds through production and stock to the shipping area, the appropriate blocks on the test and inspection record of the tag are stamped. This tag accompanies the unit when it is shipped to the customer. Customers are requested to complete the Honeywell Airlines and Avionics Products quality report portion of the tag and return it to the Honeywell Airlines and Avionics Products Quality Assurance Department. This portion of the tag provides Honeywell Airlines and Avionics Products with the necessary information required to evaluate shipping methods as well as test and inspection effectiveness.Completed cards are accumulated to provide information for a periodic analysis.3. Preinstallation TestingThe components in the RTA-44D VHF Data Radio System have been adjusted and tested prior to shipment. Therefore, preinstallation testing is not required. However, if preinstallation testing of the units is desired, refer to the customer acceptance criteria given in the Component Maintenance Manual for the appropriate unit in the system. Refer to Figure 4 in the "Description and Operation" Section of this manual for a list of related Component Maintenance Manuals.4. Equipment Changes and MarkingHoneywell Airlines and Avionics Products uses a standardized marking system to identify equipment and their subassemblies which have had changes incorporated. Refer to the front of the appropriate Component Maintenance Manual for a list of Service Bulletins affecting the unit.5. InterchangeabilityThe RTA-44D VHF Data Radio System will operate in any installation that complies with ARINC Characteristic 750; it will also operate as a RTA-44A VHF Transceiver System replacement in any installation that complies with ARINC 716. Refer to System Interwiring Diagram, Figure 208, for particulars.
HoneywellMAINTENANCE MANUALRTA-44D VHF DATA RADIO SYSTEMI.B. 1144-1 Page 202Mar 01/0223-20-026. InstallationA. GeneralThe RTA-44D VHF Data Radio System should be installed in the aircraft in a manner consistent with acceptable workmanship and engineering practices, and in accordance with the instructions set forth in this publication. To ensure that the system has been properly and safely installed in the aircraft, the installer should make a thorough visual inspection and conduct an overall operational and functional check of the system on the ground prior to flight.CAUTION: AFTER INSTALLATION OF THE CABLING AND BEFORE INSTALLATION OF THE EQUIPMENT, A CHECK SHOULD BE MADE WITH AIRCRAFT PRIMARY POWER BEING SUPPLIED TO THE MOUNT CONNECTORS TO ENSURE THAT POWER IS APPLIED ONLY TO THE PINS SPECIFIED IN INTERWIRING DIAGRAM FIGURE 208.B. Location of EquipmentLocation of the RTA-44D VHF Data Radio System in the aircraft is not critical, as long as the environment is compatible with the equipment design. Refer to the Leading Particulars, Figure 7, in the "Description and Operation" section of this manual. Forced air cooling is required for cooling the RTA-44D VHF Data Radio in accordance with ARINC Characteristic 600. The associated cooling equipment must be mounted in accordance with the manufacturer's instructions.Antenna mounting should be in accordance with the manufacturer's instructions for the antenna being used. The coaxial cable connecting the antenna to the mount should be as short and direct as possible and any required bends should be gradual. When two or more RTA-44D VHF Data Radios are installed in an aircraft, it is necessary to provide adequate space isolation between antennas of each system to ensure that the use of one transceiver does not interfere with reception from another system. A minimum of 35 dB of space isolation should be provided, and any steps which can be taken to provide further isolation should be considered. Maximum cable loss should be < 3dB.Control unit location and mounting can be determined by mutual agreement between the user and airframe manufacturer.C. Interwiring and Cable Fabrication(1) GeneralFigure 208 is the complete aircraft interwiring diagram for a single RTA-44D VHF Data Radio System and associated components. This diagram requires thorough study before the installer begins installation of the aircraft wiring.When two or more systems are being installed in the aircraft, the interconnecting wiring shown in Figure 208, as well as all other installation instructions must be duplicated.Cabling must be fabricated by the installer in accordance with Figure 208. Wires connected to parallel pins should be approximately the same length, so that the best distribution of current can be effected. Honeywell Airlines and Avionics Products recommends that all wires, including spares, shown on interwiring diagram Figure 208 be included in the fabricated harness. However, if full ARINC wiring is not desired, the installer should ensure that the minimum wiring requirements for the features and functions to be used are incorporated.NOTE: To allow for inspection or repair of the connector, or the wiring to the connector, sufficient lead length should be left so that the rear connector assembly can be pulled forward several inches when the mounting hardware for the rear connector assembly is removed. A bend should be made in the harness near the connector to allow water droplets, that might form on the harness from condensation, to drip off at the bend and not collect at the connector.
I.B. 1144-1 Page 203Mar 01/0223-20-02HoneywellMAINTENANCE MANUALRTA-44D VHF DATA RADIO SYSTEMWhen the cables are installed in the aircraft, they must be supported firmly enough to prevent movement and should be carefully protected against chafing. Additional protection should also be provided in all locations where the cables may be subject to abuse. In wire bundles, the cabling should not be tied tightly together as this tends to increase the possibility of noise pick-up and similar interference. When routing cables through the airframe, try to avoid running cables or wire close to power sources (400-Hz generator, etc). If unavoidable, the cables should cross high-level lines at a right angle, or high-quality shielded conductors should be used.If a cable must pass through a bulkhead between pressurized and unpressurized zones, this passage must conform to the aircraft manufacturer's specifications.The assembler must be knowledgeable of any system variations peculiar to the installation, and must thoroughly understand the complexities associated with handling related problems of line lengths, capacitance, and of susceptibility to interference.Electrical bonding interface characteristics per ARINC 600 Section 3.2.4 states that ground path resistance should not exceed 0.5 milliohms.The following determinants are the responsibility of the installation agency for fabrication of the wiring harness, see Figures201 and 208.RTA-44D VHF Data Radio Connector DeterminantsFigure 201Sheet 1 of 6PIN NO. TYPE SIGNAL NAME FUNCTIONMPA1 Input Mic Audio Input (HI) Microphone audio input.Part of the standard four wire microphone interwiring as described in Attachment 6 of ARINC716-10. Required for ARINC716 VHF COMM only.MPB1 Input Mic Audio Input (LO)MPC1 Input Mic PTT Microphone push-to-talk discrete input. Gnd/Low=Transmitter keyed; Open/High=Transmitter not keyed.Part of the standard four wire microphone interwiring as described in Attachment 6 of ARINC716-10. Required for ARINC716 VHF COMM only.MPD1 Output Key Event Discrete input to Flight Recorder. Follows the state of Mic PTT input. Gnd/Low=Transmitter keyed; Open/High=Transmitter not keyed. Required for ARINC716 VHF COMM only.MPA2 Input Max. Trans TimeCutoff FunctionDiscrete input that enables the maximum transmit cutoff function. Gnd/Low=Cutoff disabled; Open/High=Cutoff enabled.
HoneywellMAINTENANCE MANUALRTA-44D VHF DATA RADIO SYSTEMI.B. 1144-1 Page 204Mar 01/0223-20-02RTA-44D VHF Data Radio Connector DeterminantsFigure 201Sheet 2 of 6PIN NO. TYPE SIGNAL NAME FUNCTIONMPB2 -Mic Input Ground Required for ARINC716 VHF COMM only.MPC2 Input Data Loader Input Bus A A high speed ARINC 429 input port to allow onboard data loading for software.MPD2 Input Data Loader Input Bus BMPA3 Input Optional Remote Squelch (HI)To accommodate an optional remote squelch adjustment if so required or pro-vided. Required for ARINC716 VHF COMM only.MPB3 Input Optional Remote Squelch (ARM)MPC3 Input Optional Remote Squelch (LO)MPD3 -DC Ground Required for both ARINC716 VHF COMM and ARINC750 VDR; functions are identi-cal.MPA4 Input Functional Test Discrete input that activates LRU functional test function. Gnd/Low=activate functional test. Required for ARINC716 VHF COMMMPB4 -Audio Ground Required for ARINC716 VHF COMM only.MPC4 Output Data Loader Output Bus A A high speed ARINC 429 output port to allow onboard data loading for software.MPD4 Output Data Loader Output Bus BMPA5 Input Data Link Data Input (HI) Analog 2400bps ACARS data input. Required for ARINC716 VHF COMM only.MPB5 Input Data Link Data Input (LO)MPC5 -Reserved #1 Leave open.
I.B. 1144-1 Page 205Mar 01/0223-20-02HoneywellMAINTENANCE MANUALRTA-44D VHF DATA RADIO SYSTEMRTA-44D VHF Data Radio Connector DeterminantsFigure 201Sheet 3 of 6PIN NO. TYPE SIGNAL NAME FUNCTIONMPD5 Output 8.33-kHz Programming Discrete output that indicates to control panel the VDR is capable of 8.33-kHz or 25- kHz operation. This output is internally grounded.MPA6 Input Data from OMS/CFDS #1 Input Port (A)One of two low speed ARINC 429 data input ports provided for dual OMS/CFDS's.Required for both ARINC716 VHF COMM and ARINC750 VDR; functions are identi-cal.MPB6 Input Data from OMS/CFDS #1 Input Port (B)MPC6 Input Data from OMS/CFDS #2 Input Port (A)One of two low speed ARINC 429 data input ports provided for dual OMS/CFDS's.Required for ARINC750 VDR only.MPD6 Input Data from OMS/CFDS #2 Input Port (B)MPA7 Input Freq/Funct Select Data I/P Port B (A)One of two low speed ARINC 429 input ports to provide frequency tuning data. Required for ARINC716 VHF COMM only.MPB7 Input Freq/Funct Select Data I/P Port B (B)MPC7 Input Voice/Data Select Discrete input that enables either the PTT key line (MPC1) or the Data key line (MPD7).Gnd/Low=Data Key line enabled; Open/High=PTT enabled. Required for ARINC716 VHF COMM only.MPD7 Input Data Key Line Discrete input that keys the transmitter.Gnd/Low=Transmitter keyed; Open/High=Transmitter not keyed. Required for ARINC716 VHF COMM only.MPA8 -SpareMPB8 Input Data Loader Enable Input Discrete input to allow onboard data loading of software. Required for ARINC750 VDR only.
HoneywellMAINTENANCE MANUALRTA-44D VHF DATA RADIO SYSTEMI.B. 1144-1 Page 206Mar 01/0223-20-02RTA-44D VHF Data Radio Connector DeterminantsFigure 201Sheet 4 of 6PIN NO. TYPE SIGNAL NAME FUNCTIONMPC8 Input Freq Offset Enable Discrete input that enables the offsetting of the transmit frequency by a board-strap programmable value. Gnd/Low=Frequency offset enabled; Open/High=Frequency offset disabled. Required for ARINC716 VHF COMM only.MPD8 -Data Key Line Return Required for ARINC716 VHF COMM only.MPA9 Input SDI Bit 0 Prog A discrete input pair prewired at the rear connector to identify the specific VHF radio location in the aircraft. Required for both ARINC716 VHF COMM and ARINC750 VDR; functions are identical.MPB9 Input SDI Bit 1 ProgMPC9 -SDI Prog Pin Common Ground for the SDI code inputs. Required for ARINC716 VHF COMM only.MPD9 Output AGC OUT AGC output signal for test purposes.MPA10 -SpareMPB10 -SpareMPC10 Output Data to CMU #1, CMU#2 Output Port(A)A high speed ARINC 429 output port to CMU/MU/ATSU’s #1 and #2. Required for ARINC750 VDR only.MPD10 Output Data to CMU #1, CMU#2 Output Port(B)MPA11 Input Freq/Funct Select Data I/P Port A (A)One of two low speed ARINC 429 input ports to provide frequency tuning data. Required for ARINC716 VHF COMM only.MPB11 Input Freq/Funct Select Data I/P Port A (B)MPC11 Input Maintenance System ID 1 Identifies CFDS type along with MPA14 (See Figure 208).MPD11 Input Freq Port Select Discrete input used to select either Fre-quency/Function Select Data I/P Port A or B. Gnd/Low=Select Port A, Open/High=Select Port B. Required for both ARINC716 VHF COMM and ARINC750 VDR; functions are identical.
I.B. 1144-1 Page 207Mar 01/0223-20-02HoneywellMAINTENANCE MANUALRTA-44D VHF DATA RADIO SYSTEMRTA-44D VHF Data Radio Connector DeterminantsFigure 201Sheet 5 of 6PIN NO. TYPE SIGNAL NAME FUNCTIONMPA12 Input CMU #1 Input Bus A A high speed ARINC 429 input port from CMU/MU/ATSU #1. Used to receive com-mands/status/data in Williamsburg files, and periodic and aperiodic ARINC 429 words. Required for ARINC750 VDR only.MPB12 Input CMU #1 Input Bus BMPC12 Input CMU #2 Input Bus A A high speed ARINC 429 input port from CMU/MU/ATSU #2. Used to receive com-mands/status/data in Williamsburg files, and periodic and aperiodic ARINC 429 words. Required for ARINC750 VDR only.MPD12 Input CMU #2 Input Bus BMPA13 Output SELCAL Audio and Data Link Output (HI)An analog output to provide 2400bps MSK data to the ACARS MU. May also be used for SELCAL provisions. Required for ARINC716 VHF COMM only.MPB13 Output SELCAL Audio and Data Link Output (LO)MPC13 Input Squelch Disable A discrete input to provide squelch override or disable capability. Required for ARINC716 VHF COMM only.MPD13 -Squelch Disable ReturnMPA14 Input Maintenance System ID 0 Identifies CFDS type along with MPC11 (See Figure 208).MPB14 Input Air/Ground Discrete A discrete input to indicate if the aircraft is in the air or on the ground. Gnd/Low=Airborne, Open/High=On Ground. Required for both ARINC716 VHF COMM and ARINC750 VDR; functions are identical.MPC14 Output Data to OMS/CFDS Output Port AA low speed ARINC 429 output port to one or two OMS/CFDS's. Required for both ARINC716 VHF COMM and ARINC750 VDR; Functions are identical.MPD14 Output Data to OMS/CFDS Output Port BMPA15 Output Audio/Sidetone Output (HI) An analog output for receiver audio during receive mode and sidetone audio during voice transmit modes. Required for ARINC716 VHF COMM only.MPB15 Output Audio/Sidetone Output (LO)
HoneywellMAINTENANCE MANUALRTA-44D VHF DATA RADIO SYSTEMI.B. 1144-1 Page 208Mar 01/0223-20-02RTA-44D VHF Data Radio Connector DeterminantsFigure 201Sheet 6 of 6(2) Reserved and Spare WiresIf the installer does not wish to connect all wires, he may select wires reserved for optional functions which his system does not contain and delete these wires. He should also decide which future spare wires to include in the installation. Reserved and spare wires are identified in Figure 201 and in interwiring diagram Figure208.D. Installation of SystemThe RTA-44D VHF Data Radio is secured in the airframe with 3-MCU unit mounts. The mounts are designed to be removed without rewiring the connectors. Follow the equipment manufacturer's installation instructions to install the mount into the airframe.To wire the mounts into the system, first remove the mount connector cover and connector plate assembly. Then crimp or solder (as applicable) the interconnecting wiring to the appropriate connector pins. Finally, return the connector plate assembly and cover to their original positions. The RTA-44D VHF Data Radio (VDR) is installed in the mount as follows.(1) Slide the VDR into the mount until the guide pins are aligned and the electrical connectors are firmly engaged.(2) Secure the front of the VDR to the mount by tightening the two knurled screw clamps (located on the front of the mount) until they are firmly seated over hold-down hooks located on the front of the unit.(3) Safety-wire the two screw clamps.PIN NO. TYPE SIGNAL NAME FUNCTIONMPC15 Input Muting An optional two wire discrete output to pro-vide a switch closure internal to the VHF COMM for external system muting applica-tions during transmit modes. Open=Muting Off, Gnd=Muting On. Required for ARINC716 VHF COMM only.MPD15 -Muting ReturnBP1 Input/OutputAntenna RF Input Required for both ARINC716 VHF COMM and ARINC750 VDR; functions are identi-cal.BP2 Input DC Power Input +27.5VDC Required for both ARINC716 VHF COMM and ARINC750 VDR; functions are identi-cal.BP3 -SpareBP4 -DC Power GND Required for both ARINC716 VHF COMM and ARINC750 VDR; functions are identi-cal.BP5 -Spare
I.B. 1144-1 Page 209Mar 01/0223-20-02HoneywellMAINTENANCE MANUALRTA-44D VHF DATA RADIO SYSTEM7. Inspection and System Check ProceduresNOTE: Inspection and check procedures for the RTA-44D VHF Data Radio System includes checkout of all interfacing units that may affect performance of the VDR.A. InspectionFigure202 is a visual inspection check procedure and should be performed after system installation, prior to system checkout. In addition, the procedure should be used as a periodic inspection check.Inspection/Check ProceduresFigure 202B. System Checkout(1) GeneralAfter installation of the RTA-44D VHF Data Radio System, and inspection of the equipment per previous Figure 202, perform a continuity and visual check of the system interwiring per paragraph 7.B.(2). A post-installation test per paragraph 7.B.(3) should then be performed.(2) System Interwiring CheckVisually check the system interwiring for abnormalities, such as cables rubbing unprotected metal edges or tightly stretched cables. Check continuity of all interwiring. In particular, check the following:(a) Check that the VDR is properly installed and the hold-down screw clamps are tight.(b) Check wiring harness connectors for security and connection to the VDR.(c) Check that antenna transmission line connectors are securely fastened.(d) Check that cables do not interfere with aircraft controls or other equipment.(3) Software On Board Loadable InstructionsThe VDR Mode 2 is capable of on board software loadability. The following describes this process:(a) Loosen Phillips head screw on cover, left of handle, to expose the front panel PCMCIA slot. When the main program card is inserted into this slot, the front panel LCD will display either the "Program Prompt" Screen (Figure 202.1) or the "Invalid Card" Screen (Figure 202.2).EQUIPMENT INSPECTION/CHECK PROCEDURE3 MCU Unit Mount As defined by manufacturer's instructions.RTA-44D VHF Data Radio(1) Check that unit is fully inserted in mount and that the knurled screw clamps which secure the unit in the mount are tight and safety wired.(2) Inspect the case for deformation, dents, corrosion, and damage to finish; ensure that ventilation holes in the unit are not clogged.ARINC 716/750 Control PanelAs defined by manufacturer's instructions.ARINC 716/750 VHF AntennaAs defined by manufacturer's instructions.
HoneywellMAINTENANCE MANUALRTA-44D VHF DATA RADIO SYSTEMI.B. 1144-1 Page 210Mar 01/0223-20-02"Program Prompt" ScreenFigure 202.1"Invalid Card" ScreenFigure 202.2(b) When the "Start" key of the "Program Prompt" Screen (Figure 202.1) is pressed, program loading starts and the front panel LCD displays the "Programming in Progress" Screen, (Figure 202.3).(c) The "S....S" field in the third row of the display is a string that shows the module presently loading. After loading of the individual modules ends, the "S...S" field momentarily shows the software part number.(d) The moving thermometer-type display near the bottom half of the display indicates the percent completion of the program load.PRE S S S TARTTOLOADPRO G RAM|↓START↓INVALID CAR DTURN POWER OFF REMOVE CAR D
I.B. 1144-1 Page 211Mar 01/0223-20-02HoneywellMAINTENANCE MANUALRTA-44D VHF DATA RADIO SYSTEM"Programming in Progress" ScreenFigure 202.3(e) When the program loading is complete, the front panel LCD displays either the "Load Complete" Screen (Figure 202.4) if the program loading was successful, or the "Load Failed" Screen (Figure 202.5) if the program loading failed."Load Complete" ScreenFigure 202.4LOADINGSSSSSSSSSSSSS0 5 0 1 0 0XXXXXXXXXX%COMPLETEPROGRAMLOADOKREMOVE CAR D
HoneywellMAINTENANCE MANUALRTA-44D VHF DATA RADIO SYSTEMI.B. 1144-1 Page 212Mar 01/0223-20-02"Load Failed" ScreenFigure 202.5(f) If the program was successfully loaded, the front panel LCD displays the "Verifying Program" Screen (Figure 202.6) when the program card is removed. The verification consists of checking the cyclic redundancy check (CRC) of the loaded program."Verifying Program" ScreenFigure 202.6(g) When the program verification is completed, the front panel LCD displays either the "Normal Mode" Screen (Figure 203.1) if the verification succeeded, or the "Invalid Load" Screen (Figure 202.7) if the verification failed.PROGRAMLOADFAILEDREMOVE CAR DVERIFYINGPROGRAM
I.B. 1144-1 Page 213Mar 01/0223-20-02HoneywellMAINTENANCE MANUALRTA-44D VHF DATA RADIO SYSTEM"Invalid Load" ScreenFigure 202.7(4) Post-Installation Check(a) Test Equipment RequiredNone required.(b) System TestA functional self test of the RTA-44D VHF Data Radio System may be initiated by pressing the "test" key pushbutton switch as designated on the front panel LCD (Figures 203 and 203.1). Although the "Normal Mode" Screen indicates that this is actuated from the right key, the left key has the same function if pressed while the VDR LCD is in its normal mode."Normal Mode" Screen (-0101, -0110, -0202, -0303 and -0505)Figure 203INVALIDLOADTURN POWEROF FVHFDATARADIOP/N:064-50000-0101S/W:01/0 1PUSHTO↓TEST↓
HoneywellMAINTENANCE MANUALRTA-44D VHF DATA RADIO SYSTEMI.B. 1144-1 Page 214Mar 01/0223-20-02"Normal Mode" Screen (-2000 and -2051)Figure 203.1The Self-Test Mode starts by displaying the "Test in Progress" Screen (Figure 204) one second after pressing the "test" key. This is displayed for four seconds with a moving thermometer along the bottom of the LCD indicating the progress of the test from one to five seconds"Test in Progress" ScreenFigure 204The "Normal Mode" Screen (Figures 203 and 203.1) is displayed for the first second of the test sequence. Once complete, the "Test Complete, No Failures" Screen is displayed (Figure 205), or the "Test Complete, Failures" Screen is displayed (Figure 206). Both screens contain two key selections each: "MAINT" and "RETURN" or "MAINT" and "WHY?", respectively.•"MAINT" -For both screens, "MAINT" is located on the left key. This allows the initiation of the extended maintenance pages of the system for troubleshooting. Refer to Paragraph4 of "Fault Isolation" Section 100 of this manual.•"RETURN" -In the "Test Complete, No Failures" Screen, the "RETURN" key to the right returns the system to its "Normal Mode" Screen (Figures203 and 203.1).VD RPN:064-50000-2000SW:998-2858-501PUSHTO↓TEST↓VHFDATARADIOTESTINPROGRESS0 5 0 1 0 0XXXXXXXXXXX
I.B. 1144-1 Page 215Mar 01/0223-20-02HoneywellMAINTENANCE MANUALRTA-44D VHF DATA RADIO SYSTEM•"WHY?" -In the "Test Complete, Failures" Screen, the "WHY?" key to the right puts the system into the Display-Failures Mode where individual system failures are displayed one per page. Refer to Paragraph 3 of "Fault Isolation" Section 100 of this manual.While in the Self-Test Mode, not pressing either key for five minutes causes the system to return to the "Normal Mode" Screen (Figures 203 and 203.1)."Test Complete, No Failures" ScreenFigure 205"Test Complete, Failures" ScreenFigure 206C. Flight Tests(1) Preflight Test(a) GeneralThe following test procedure gives instructions for a preflight test which ensures that the RTA-44D VHF Data Radio System is functioning in an acceptable manner prior to takeoff.(b) Test Procedures1Establish the initial control settings listed below.VHFDATARADIOTESTCOMPLETENOFAILURE SMAINTRETURNVHFDATARADIOTESTCOMPLETEFAILURES-↓MAINTWHY?CONTROL PANELPowerFrequency SelectorVolume ControlPOSITIONOnTune to any local VHF frequency (local control tower or ground control frequency)Midrange
HoneywellMAINTENANCE MANUALRTA-44D VHF DATA RADIO SYSTEMI.B. 1144-1 Page 216Mar 01/0223-20-022Using the system's headphone (or speaker) and microphone, check operation of the RTA-44D VHF Data Radio System.3Key the microphone and speak into it; speech should be audible. Request a radio check, and release the push-to-talk button.4Listen through the headphones (or speaker) and press the SQ/TEST pushbutton. A squelch break should be audible.5As soon as possible, a local flight check should be made to verify system operation for both local and distant stations.(2) In-Flight Confidence TestUpon completion of the post-installation and preflight checks, a local flight may be made to verify system operation for both local and distant stations. Repeat the test procedure found in paragraph 7.C.(1)(b).8. Removal and ReplacementA. Removal(1) Loosen the two knurled screw clamps (located on the front of mount) that secure the VDR to the mount.(2) Gently pull the VDR forward until it is disconnected from the rear connector and guide pins.B. Replacement(1) Slide the VDR onto the tray of the mount and then gently push the VDR until 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 firmly seated over the hold-down hooks located on the front of the VDR.(3) Safety wire the two knurled screw clamps.9. Maintenance ProceduresA. Adjustments and AlignmentsThere are no adjustments or alignments required for the RTA-44D VHF Data Radio System. All alignment and adjustment procedures are accomplished during bench maintenance. The technician should remove the unit from the aircraft and reference should be made to the related maintenance manual when unit performance indicates an adjustment or an alignment is required.B. System ProtectionThe system should be protected by a 10-ampere circuit breaker located at the circuit breaker panel in the aircraft.C. Lubrication PracticesThere are no requirements for lubrication of any RTA-44D VHF Data Radio System components.D. CleaningWhen deemed necessary, depending upon the environment to which the equipment is exposed and the intensity of use, periodic cleaning should be performed. Any dust on the RTA-44D VHF Data Radio System LRU's should be wiped off with a lint-free cloth.NOTE: Any cleaning of equipment interiors should be limited to that required when performing overhaul (bench-type) work.
HoneywellMAINTENANCE MANUALRTA-44D VHF DATA RADIO SYSTEMI.B. 1144-1 Page 217/218Mar 01/0223-20-02RTA-44D VHF Data Radio Dimensional Outline DrawingFigure 207
I.B. 1144-1 Page 219/220Mar 01/0223-20-02HoneywellMAINTENANCE MANUALRTA-44D VHF DATA RADIO SYSTEMRTA-44D VHF Data Radio System Interwiring DiagramFigure 208

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