Honeywell RTA-44DM2 Users Manual
Honeywell
MAINTENANCE MANUAL
RTA-44D VHF DATA RADIO SYSTEM
TO: Holders of RTA-44D VHF Data Radio System Maintenance Manual, I.B. 1144-1.
REVISION NO. 5
to
MAINTENANCE MANUAL, I.B. 1144-1
Covering
Date of Original Publication Sep/93
Date of Revision No. 1 Jul/95
Date of Revision No. 2 Nov/95
Date of Revision No. 3 Sep/97
Date of Revision No. 4 Feb 01/00
Date of Revision No. 5 Mar 01/02
INSTRUCTIONS:
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.
I.B. 1144-1
23-20-02
Honeywell
System
Maintenance Manual
RTA-44D
VHF Data Radio System
Honeywell
CAGE Code 97896
I.B. 1144-1 T-1
Sep/93
Rev 5: Mar 01/0223-20-02
Honeywell
NOTE
IF ANY UNUSUAL OR SPECIAL SERVICE PROBLEMS ARISE,
CONTACT HONEYWELL AIRLINES AND AVIONICS PRODUCTS
CUSTOMER SUPPORT DEPARTMENT.
PROPRIETARY NOTICE
This document contains proprietary information
and such information may not be disclosed to
others for any purpose, nor used for manufacturing purposes without written permission from
Honeywell International, Inc.
23-20-02
PN-1
No Date
Honeywell
MAINTENANCE MANUAL
RTA-44D VHF DATA RADIO SYSTEM
REVISION NO. 5
Mar 01/02
REVISION HIGHLIGHTS
Pages that have been revised are listed below, together with the highlights of the revision.
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
PAGE NUMBER DESCRIPTION OF CHANGE
T-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.
1 Added reference to Mode 2 functionality of VDR.
2 Added -2000 and -2051 units to RTA-44D VHF Data Radio System
Components table, Figure 2.
3 Added reference to -2000 and -2051 units in Related Publications table,
Figure 4.
4 Added reference to VDR Mode 2 functionality and made corrections to
Configurations Available table, Figure 5.
5 Added Mode 2 VDR functionality to RTA-44D VHF Data Radio Features table,
Figure 6.
6 Added VDR Mode 2 units to Leading Particulars listing, Figure 7.
7 Changed number of pages in Figure 7.
8 Changed 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 7.1
8.3/8.4 Added ARINC 429 Output Labels table, Figure 7.2
9 Added -2000 and -2051 units to Environmental Certification table, Figure 8.
10 Restructured Paragraph 4 to preserve logical order. Figure 11 moved to
Figure 10.
11 Restructured Paragraph 4 to preserve logical order. Figure 10 moved to
Figure 10.1.
12 Restructured Paragraph 4 to preserve logical order. Figure 13 moved to
Figure 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 to
I/O Section discussion. Added Basic Theory of Operation of Auxiliary
Processor Module paragraph.
17/18 Adjusted formatting to accommodate added Theory of Operation of Auxiliary
Processor Module paragraph.
I.B. 1144-1 RH-1
Mar 01/02
23-20-02
Honeywell
MAINTENANCE MANUAL
RTA-44D VHF DATA RADIO SYSTEM
101 Added VDR Mode 2 Units, (-2000 and -2051) "Normal Screen" diagram to
Figure 101. Corrected screen nomenclature for consistency.
102 Updated LCD Control Flow by adding CMU PORT STATUS page to Figure
101.1
103 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 and
114.2.
110 Added new Failure pages from VDR Mode 2 units (-2000 and -2051), as
Figures 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 (-2000
and -2051) as Figure 119.1.
114 Eliminated Figure 122.
115 Updated discussion of Previous Flight Legs Failure data. Corrected screen
nomenclature 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 4
206 Updated Radio Connector Determinants Table, Figure 201, Sheet 5
207 Updated Radio Connector Determinants Table, Figure 201, Sheet 6
209 Added Software On Board Loadable Instructions.
210 Added Software On Board Loadable Instructions.
211 Added Software On Board Loadable Instructions
212 Added Software On Board Loadable Instructions
213 Added Software On Board Loadable Instructions
214 Added "Normal Mode" Screen for VDR Mod 2 units (-2000 and -2051), Figure
203.1.
215 Text moved from previous revision to accommodate new data on previous
pages and correction to "Test Complete, Failures" Screen, Figure 206 .
216 Text moved from previous revision to accommodate new data on previous
pages .
217/218 Text moved from previous revision to accommodate new data on previous
pages and Figure 207 updated.
219/220 Text moved from previous revision to accommodate new data on previous
pages and Figure 208 updated.
I.B. 1144-1 RH-2
Mar 01/02
23-20-02
Honeywell
MAINTENANCE MANUAL
RTA-44D VHF DATA RADIO SYSTEM
RECORD OF REVISIONS
REV.
NO.
REVISION
DATE
DATE
INSERTED
BY REV.
NO.
Complete through
Revision No. 5
REVISION
DATE
DATE
INSERTED
BY
I.B. 1144-1 RR-1
23-20-02
No Date
Honeywell
MAINTENANCE MANUAL
RTA-44D VHF DATA RADIO SYSTEM
RECORD OF REVISIONS
REV.
NO.
REVISION
DATE
DATE
INSERTED
BY REV.
NO.
REVISION
DATE
DATE
INSERTED
BY
I.B. 1144-1 RR-2
23-20-02
No Date
Honeywell
MAINTENANCE MANUAL
RTA-44D VHF DATA RADIO SYSTEM
RECORD OF TEMPORARY REVISIONS
T.R.
NO. DATE
DATE
INSERTED
Complete Through
Temporary Revision 23-5
BY DATE
REMOVED
BY
I.B. 1144-1 RTR-1
23-20-02
Mar 01/02
Honeywell
MAINTENANCE MANUAL
RTA-44D VHF DATA RADIO SYSTEM
RECORD OF TEMPORARY REVISIONS
T.R.
NO. DATE
DATE
INSERTED BY
DATE
REMOVED BY
I.B. 1144-1 RTR-2
23-20-02
Mar 01/02
Honeywell
MAINTENANCE MANUAL
RTA-44D VHF DATA RADIO SYSTEM
LIST OF EFFECTIVE PAGES
SUBJECT PAGE DATE SUBJECT PAGE DATE
Title Page *T-1 Mar 01/02
Proprietary PN-1 No Date
Notice
Revision *RH-1 Mar 01/02
Highlights *RH-2 Mar 01/02
Record of RR-1 No Date
Revisions RR-2 No Date
Record of RTR-1 Mar 01/02
Temporary RTR-2 Mar 01/02
Revisions
List of *LEP-1 Mar 01/02
Effective LEP-2 Blank
Pages
Table of TC-1 Mar 01/02
Contents TC-2 Blank
Introduction INTRO-1 Mar 01/02
Description 0 Mar 01/02
and Operation 1 Mar 01/02
*2 Mar 01/02
*3 Mar 01/02
*4 Mar 01/02
*5 Mar 01/02
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*8.1 Mar 01/02
*8.2 Mar 01/02
*8.3 Mar 01/02
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105 Mar 01/02
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*111 Mar 01/02
*112 Mar 01/02
*113 Mar 01/02
*114 Mar 01/02
*115 Mar 01/02
*116 Mar 01/02
Maintenance 201 Mar 01/02
Practices *202 Mar 01/02
*203 Mar 01/02
*204 Mar 01/02
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*207 Mar 01/02
208 Mar 01/02
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F*217 Mar 01/02
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F*219 Mar 01/02
F*220 Blank
Fault Isolation *101 Mar 01/02
*102 Mar 01/02
*103 Mar 01/02
104 Mar 01/02
I.B. 1144-1 LEP-1/LEP-2
23-20-02
Mar 01/02
Honeywell
MAINTENANCE MANUAL
RTA-44D VHF DATA RADIO SYSTEM
TABLE OF CONTENTS
Paragraph/Title Page
DESCRIPTION AND OPERATION - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 1
FAULT ISOLATION - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 101
MAINTENANCE PRACTICES - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 201
I.B. 1144-1 TC-1/TC-2
23-20-02
Mar 01/02
Honeywell
MAINTENANCE MANUAL
RTA-44D VHF DATA RADIO SYSTEM
INTRODUCTION
This 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
I.B. 1144-1 INTRO-1
23-20-02
Mar 01/02
Honeywell
MAINTENANCE MANUAL
RTA-44D VHF DATA RADIO SYSTEM
RTA-44D VHF Data Radio
Figure 1
I.B. 1144-1 Page 0
Mar 01/02
Honeywell
MAINTENANCE MANUAL
RTA-44D VHF DATA RADIO SYSTEM
DESCRIPTION AND OPERATION
1. General
This 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 Equipment
The 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 Numbers
Components 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 1
23-20-02
Mar 01/02
Honeywell
MAINTENANCE MANUAL
RTA-44D VHF DATA RADIO SYSTEM
EQUIPMENT
TYPE NUMBER EQUIPMENT DESCRIPTION
RTA-44D
VHF Data Radio
Airborne VHF Data Radio (VDR) capable of VHF
COM (ARINC 716, EUROCAE ED-23B) voice and
analog data processing through digital signal processing (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 capable of RTCA DO-207 "stuck mike" detection without warning tone. Complies with DO-178B.
Capable of interfacing CMC per ARINC 604.
Capable 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 requirements 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.
Honeywell
PART NUMBER
064-50000-0101
064-50000-0110
Same 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.
Same as -0202, except capable of interfacing
CFDS in accordance to McDonnell Douglas software requirements (replaces ABD-0048C implementation).
Same as -0202, except it adds Mode A functionality per ARINC 750-3.
Same as -0110, except it adds Mode A and Mode 2
functionality specified in ARINC 750-3 and meets
DO-160D requirements.
Same as -0505, except it adds Mode 2 functionality
specified in ARINC 750-3 and meets DO-160D
requirements.
RTA-44D VHF Data Radio System Components
(Honeywell Supplied)
Figure 2
064-50000-0202
064-50000-0303
064-50000-0505
064-50000-2000
064-50000-2051
I.B. 1144-1 Page 2
23-20-02
Mar 01/02
Honeywell
MAINTENANCE MANUAL
RTA-44D VHF DATA RADIO SYSTEM
C. Equipment Required but Not Supplied
Figure 3 lists equipment required for the RTA-44D VHF Data Radio System, but not supplied by
Honeywell.
EQUIPMENT DESCRIPTION
Power 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.
Equipment Required but Not Supplied
Figure 3
D. Related Publications
Figure 4 lists the publications covering the RTA-44D VHF Data Radio and test procedure supporting the
system.
PUBLICATION
RTA-44D VHF Data Radio
Part Numbers 064-50000-0101, -0110 and -2000
Component Maintenance Manual
RTA-44D VHF Data Radio
Part Numbers 064-50000-0202, -0303, -0505 and -2051
Component Maintenance Manual
Related Publications
Figure 4
HoneywelI
IDENTIFICATION
NUMBER
I.B. 1144A-2 23-20-36
I.B. 1144A-3 23-20-38
IDENTIFICATION
ATA
NUMBER
I.B. 1144-1 Page 3
23-20-02
Mar 01/02
Honeywell
MAINTENANCE MANUAL
RTA-44D VHF DATA RADIO SYSTEM
2. Configurations Available
Figure 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.
FEATURES
COMPATIBILITY
INTERFACE 8.33-kHz
CHANNEL
Honeywell
PART
NUMBER
064-50000
-0101 X X X X X
-0110 X X X X X
BASIC
UNIT
FAULT
MEMORY
STUCK
MIKE
ALARM
ACARS
BOEING
CMC
CFDS
SPACING
Mode AMode
2
-0202 X X X X
-0303 X X X X
-0505 X X X X
-2000 X X X X
-2051 X X X X
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 Available
Figure 5
FEATURE
Basic 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.
4
X
DESCRIPTION
1
X
2
X
1
X
4
X
1
X
3
X
X
X X
X X X
X X X
RTA-44D VHF Data Radio Features
Figure 6
Sheet 1 of 2
I.B. 1144-1 Page 4
23-20-02
Mar 01/02
Honeywell
MAINTENANCE MANUAL
RTA-44D VHF DATA RADIO SYSTEM
FEATURE
Basic Unit (Continued)
Fault Memory
Stuck Microphone Alarm
ACARS Compatible
CMC Interface
CFDS Interface
DESCRIPTION
Capable 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 Channel
Spacing Capability
Mode A The Mode A VDR contains an ACARS MSK modem and a digital high
Mode 2 The Mode 2 VDR contains a D8PSK modem and a digital high speed
I.B. 1144-1 Page 5
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.
speed ARINC 429 link to the MU/CMU/ATSU per the Mode A
functionality specified in ARINC 750-3.
ARINC 429 link to the MU/CMU/ATSU per Mode 2 functionality in
ARINC 750-3. The Mode 2 VDR meets DO-160D requirements.
RTA-44D VHF Data Radio Features
Figure 6 (Sheet 2 of 2)
23-20-02
Mar 01/02
Honeywell
MAINTENANCE MANUAL
RTA-44D VHF DATA RADIO SYSTEM
3. System Leading Particulars
A. Unit Specifications
Figure 7 lists the leading particulars for the RTA-44D VHF Data Radio System.
CHARACTERISTICS DESCRIPTION
General - Overall VDR
Form Factor 3MCU (ARINC600)
Dimensions Refer to outline drawing, Figure 207.
Weight 9.6 LBS., (4,4Kg) Maximum
General - Overall VDR
Power 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)
Temperature
Operating
Storage
Cooling ARINC600
Humidity 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 136.975MHz
Channel Spacing 25-kHz and 8.33-kHz
Frequency Stability ±0.0005%
Duty Cycle
Certification
-0101, -0110, -0202, -0303 and
-0505 Units
-2000, -2051 Units
-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)
Continuous operation from -55°C to +70°C with ARINC 600 cooling.
TSO C37d Class3 and 5 and C38d ClassC and E;
DO-160C Categories
/A2D2/ZCA/MNB/XXXXXXAAAZZUZ/XXE2/XX
DO-186a, DO-178B, DO-207 AND EUROCAEED-23B
TSO C37d Class3 and 5 and C38d ClassC and E;
DO-160D Categories
[(A2)(D2)Z]BAB[RB1]XXXXXXZAAZCRRL[A2C2]XXA
DO-186a, DO-178B, DO-207 AND EUROCAEED-23B
General - Analog Voice/Data
Channel Changing Time
Transmit to Receive Recovery
I.B. 1144-1 Page 6
Less 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.
Leading Particulars
Figure 7 (Sheet 1 of 4)
Mar 01/0223-20-02
Honeywell
MAINTENANCE MANUAL
RTA-44D VHF DATA RADIO SYSTEM
CHARACTERISTICS DESCRIPTION
Analog Voice Receiver
Sensitivity
Selectivity
25-kHz Channel Spacing
8.33-kHz Channel Spacing
Cross Modulation Meets requirements of ARINC716, Section3.6.4.
AGC Within 3dB with inputs from 5µV to 100,000 µV and not
Audio Output 40milliwatts maximum into a 600±20% ohm resistive
Audio Output Frequency Response Within 6dB from 300 to 2500Hz.
Audio Output Harmonic Distortion Total harmonic distortion will not exceed 5% with
Audio Output Regulation No more than 2dB voltage change from a 10mW
Voice Phase Shift Limit Audio output does not depart from that of the
Undesired Responses 80 dB
Input Impedance 50 ohms, nominal
Analog Voice Transmitter
Output Power 25 watts (nominal)
Harmonic and Spurious Emission Any harmonics of the desired frequency is attenuated at
Greater than 6dB SINAD for -107dBm signal modulated
30% at 1000Hz.
±8-kHz at 6dB bandwidth, ±17-kHz at 60dB bandwidth.
±2.78-kHz at 6 dB bandwidth, ±7.365-kHz at 60 dB
bandwidth.
more than 6dB with inputs from 5µV to 500,000 µV.
load, factory set at 10mW at 1000 Hz.
1000µV input signal modulated 30% at 1000Hz.
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.
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.
least 60dB below the desired carrier level and any other
emission will be attenuated at least 118dB below the
carrier level.
Leading Particulars
Figure 7 (Sheet 2 of 4)
I.B. 1144-1 Page 7
23-20-02
Mar 01/02
CHARACTERISTICS DESCRIPTION
Analog Voice Transmitter (Con’t)
Honeywell
MAINTENANCE MANUAL
RTA-44D VHF DATA RADIO SYSTEM
Transmitter Modulation Frequency
Response
Audio Distortion 6% maximum for 30% modulation and 10%maximum
Modulation Level 90% modulation minimum for an input level of 0.25volts
Analog Data Receiver
Gain SELCAL/Output 0.6volts rms minimum with a 2µV signal modulated
Frequency Response SELCAL
Output
Distortion SELCAL Output 4.5% maximum with an input signal of 1000µV
AGC Attack Time SELCAL Output Reaches 90% of its steady-state value within
Flat within 6dB from 300Hz to 2500Hz.
for 90% modulation with a 0.5volt input and a
modulating frequency from 300Hz to 2500Hz.
rms at 1000Hz.
30% at 1000Hz into a 600-ohm load.
±2.5dB from 312Hz to 1200Hz (post detection
response with respect to 1000Hz is ±4.5dB from
300Hz to 6600Hz).
modulated 30% at 1000Hz and a level adjusted to
provide 0.5 volts into a 600-ohm load.
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 Transmitter
Modulation 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.
Leading Particulars
Figure 7 (Sheet 3 of 4)
I.B. 1144-1 Page 8
23-20-02
Mar 01/02
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