Honeywell RTA-83A User Manual 8

Download:
Mirror Download [FCC.gov]
Document ID	75824
Application ID	mt7Ec5Mf8zhKwDiu/31Kjg==
Document Description	8
Short Term Confidential	No
Permanent Confidential	No
Supercede	No
Document Type	User Manual
Display Format	Adobe Acrobat PDF - pdf
Filesize	64.56kB (807033 bits)
Date Submitted	1999-12-14 00:00:00
Date Available	1998-10-08 00:00:00
Creation Date	2001-05-12 11:28:43
Producing Software	Acrobat Distiller 4.0 for Windows
Document Lastmod	2001-05-12 11:28:44
Document Title	8

1.8. 1183—1
Alliedsignal Commercial Avionics Synemu
Maintenance Manual
RTA-83A
VHF Communications
System
AlliedSignal Commercial Avionics Symems
NOTE
[F ANY UNUSUAL OR SPECIAL SERVICE PROBLEMS ARISE,
CONTACT ALLIEDSIGNAL COMMERCIAL AVIONICS SVSTEMS
CUSTOMER SUPPORT DEPARTMENT.
PROPRIETARY NOTICE
This document contains proprietary information
and such infornation may not be disclosed to
others for any purpose, nar used for nanufacv
turing purposes without written permission
from AiliedSignai Inc.
23-20-03
AllledSigml Comma-cm Avionics Systems
MAINTENANCE MANUAL
RTA—83A VHF COMMUNICATIONS SYSTEM
RECORD OF REVISIONS
,7,___.__—_f
REVISION DATE DATE
DATE INSERTED INSERTED
A“ _
=I=
la;
f i;—
‘ 1
If '
r L 4
23-20-03 No 551;
Alliedsignal Commercial Avionics Synems
MAINTENANCE MANUAL
RTA783A VHF COMMUNICATIONS SVSTEM
RECORD OF REVISIONS
REVISION
DAIE
DATE REV. REVISION
INSERTEH N0. DAYE
DATE
INSERTED
I.B. 1183—1
AlliedSignal Commercial Avionics Systems
MAINTENANCE MANUAL
RTA—83A VHF COMMUNICATIONS SYSTEM
L|ST OF EFFECTIVE PAGES
SUBJECT PAGE M SUBJECT PAGE D TE
Title Page T—l Jun/97 206 Jun/97
207 Jun/97
Proprietary PN—l No Date 208 Jun/97
Nuke 209 Jun/97
210 Jun/97
Record of RR-l No Date 211 Jun/97
Revisions RR—Z No Date 212 Jun/97
213 Jun/97
List of LEP—I Jun/97 214 Jun/97
Effective LEP-Z Blank F 215 Jun/97
Pages F 216 Blank
F 217 Jun/97
Table of TC—l Jun/97 F 218 Blank
Contents TC—Z Blank
Introduction INTRO—1 Jun/97
Description 0 Jun/97
and Operation 1 Jun/97
2 Jun/97
3 Jun/97
4 Jun/97
5 Jun/97
6 Jun/97
7 Jun/97
8 Jun/97
9 Jun/97
10 Jun/97
11 Jun/97
12 Jun/97
13 Jun/97
14 Blank
Fault Isolation 101 Jun/97
102 Blank
Maintenance 201 Jun/97
Practices 202 Jun/97
203 Jun/97
204 Jun/97
205 Jun/97
* INDICATES PAGES REVISED, ADDED OR DELETED IN LATEST REVISION
F INDICATES FOLDOUT PAGES — PRINT ONE SIDE ONLY
LEP—l/LEP-Z
1.13. 1183—1 23_20_03 Jun/97
AlfiedSignal Commercial Avionics Systems
MAINTENANCE MANUAL
RTA-83A VHF COMMUNICATIONS SYSTEM
TABLE OF CONTENTS
ParagraphzTitIe Page
DESCRIPTION AND OPERATION ....................... 1
FAULT ISOLATION .......................... 10)
MAINTENANCE PRACTICES ........................ 201
TC—l/TC-Z
1.8. 1183—1 23_20_O3 Jun/97
I‘B.
1183-1
AlliedSignal Commercial Avioniu Systems
MAINTENANCE MANUAL
RTA—83A VHF COMMUNINCATXONS SYSTEM
INTRODUCTiON
This manual, 1.8. 11837] (23—20—03), contains
information covering description and operation,
installation, and checkout procedures for the
Afliedsignfl Commercial Avionics Systems RTA—BSA
VHF Communications System.
23—20-03
INTRO-l
Jun/97
AdeShn-IComnusehlAfioMcSSwflans
MAINTENANCE MANUAL
RTAA83A VHF COMMUNICATIONS SYSTEM
ewe
caeaa
$289
e.e°¢aaa=
333.22 a
.e¢.oae°==.q.
...=oa¢=.°..°..
=.a.==oeo.=e.a..a
a..oaeoo=°==.ea.9
....a°.==a°.°..o
-=°°=gao.°aaao.
aeoea.===ag.°.
o.qaa=.ooe.o.
.eaae.eeo.o
eaoaacao.
o=.==o°
o 3
8065987
RTA—83A VHF Communications Transceiver
Figure 1
23-20—03
Page 0
Jun/97
1183—1
I.B.
Alliedsignal Commercial Avionin Systems
MAINTENANCE MANUAL
RTA—B3A VHF COMMUNICATIONS SYSTEM
DESCRIPTION AND OPERATION
1. Genera]
This section contains descriptive information covering the RTA—SSA VHF
Communications System and lists other components required for system
operation. The RTA—B3A VHF Communications Transceiver is illustrated in
figure 1.
A. Purpose of Equipment
The RTA—83A VHF Communications System consists of an airborne VHF
communications transceiver designed to provide clear voice and data
communications between on—board aircraft systems, to other aircraft
systems, and to ground based systems. The system provides
dependable operation in the European assigned 8.33—kHz spaced
channels of the 118,000 to 136.992 MHz band and also in the 25-kHz
spaced channels of the 118.000 to 136.975 MHz frequency band. The
RTA~83A has two basic types of operation: standard double sideband
am analog voice communications and MSK (minimum shift keying) data
capability.
The RTA—BBA VHF Communications Transceiver (shown in figure 1)
conforms to industry standards: Aeronautical Radio Incorporated
(ARINC) 566A Mark 2 VHF Communications Transceiver, Radio Technical
Commission for Aeronautics (RTCA) documents number 007186a Minimum
Operational Performance Standards (MOPS) for Airborne Radio
Communications Equipment Operating within the Radio Frequency Range
117.975 — 137.000 Megahertz and number 00—207 MOPS for Devices that
Prevent Blocked Channels Used in Two—Way Radio Communications Due to
Unintentional Transmissions, and European Organisation 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 and ED—Gl Minimum
Operating Performance Specification for Devices that Prevent
Unintentional or Continuous Transmissions.
The RTA—83A is fully interchangeable with the earlier ARINC 566
RTA743A VHF Communications Transceivers for backward compatibility.
In an Aircraft Communications Addressing and Reporting System
(ACARS), the RTA—83A is a simple transceiver with an analog
interface to the ACARS Management Unit (MU).
The RTA-BBA VHF Communications 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 Aircraft Communications Addressing and Reporting System
(ACARS) Management Unit (MU) or a Communications Management Unit
(CMU) for its digital control and data functions.
I.B. 118371 P 1
23-20-03 £5597
Alliedslgnal Commercial Avionics Syfimnl
MAINTENANCE MANUAL
RTA—83A VHF COMMUNICATIONS SYSTEM
Depending upon the selected mode, the RTA»83A operates with the
following equipment:
an ARINC 597, 724, or 724 ACARS MU,
an ARINC 566A voice audio input source and output sink,
an ARINC 566A voice frequency control source,
an antenna.
B. Equipment Part Numbers
Components of the RTA—83A VHF Communications System supplied by
AlliedSignal Commercial Avionics Systems (CAS) are listed in
figure 2. The figure lists the currently available components of
the system, along with part numbers and equipment type numbers.
[— EQUIPMENT
TYPE NUMBER EQUIPMENT DESCRIPTION PART NUMBER
RTA-B3A VHF Airborne VHF communications 064—50001—0101
Communications transceiver capable of receiving
Transceiver and transmitting VHF communications
signals over a frequency range of
118.000 to 136.992 MHz with
8‘33—kHz channel spacing or a
frequency range of 118.000 to
136.975 with 25—kHz channel
spacing.
Complies to RTCA 00—207 "stuck mic"
detection which selectably emits a
1—kHZ interruptedAwarning sidetone
during last five seconds of
35—second transmission.
Meets D0—IGOC HIRF and lightning
protection requirements and ZOO-ms
power interrupt transparency
requirements. Meets ICAO Annex 10
FM interference immunity. 4
RTA—83A VHF Communications System Components (CAS Supplied)
Figure 2
LB‘ 118341 P 2
23-20—03 $797
AlliedSignal Commemial Avionics Systems
MAINTENANCE MANUAL
RTA—B3A VHF COMMUNICATIONS SYSTEM
C. Equipment Required but Not Supplied
Figure 3 lists equipment required for the PTA—83A system, but not
supplied by AlliedSignal Commercial Avionics Systems.
EQUIPMENT DESCRIPTION
DC power supply of 27.5 volts, 1.0 ampere
nominal during reception and 8.0 amperes
maximum during transmission.
Power Source
Audio system with an input impedance of 200 to
10,000 ohms.
Provides remote control of frequency selection
for 8.33—kHz or 25—kHz channel spacing system
operation (ARINC Mark 2, two—out—oF—five per
ARINC SEGA—7 or ARINC 429), power, on/off,
volume, and squelch control.
Audio Distribution
System
ARINC Characteristic
566A Control Panel
MU/CMU Provides control and data source/sink when
operating in the MSK data mode.
Mount Provides a means of mounting RTA—83A VHF
Communications Transceiver in the aircraft.
Capable of receiving and transmitting VHF
signals over a frequency range of 118.000 MHz
through 136.992 MHZ.
Necessary connectors and cables as shown in
RTA—83A VHF Communications System Interwiring
Diagram, figure 204.
VHF Antenna
Cables and Connectors
Equipment Required but Not Supplied
Figure 3
Page 3
1.8. 1183—1 23_20_03 Jun/97
Alliedstgnal Commercial Avionics Systems
MAINTENANCE MANUAL
RTA783A VHF COMMUNICATIONS SYSTEM
D. Related Publications
Figure 4 lists the publications covering the RTA—83A VHF
Communications System.
CAS ATA
IDENTIFICATION IDENTIFICATION
PUBLICATION NUMBER NUMBER _|
(Rm-83A VHF Communications Transceiver I.B. 1183F ‘ 23420—39
Component Maintenance Manual
Related Publications
Figure 4
24 Configurations Available
Figure 5 lists the available configurations of the RTA—83A and the
features contained in each configurationI Figure 6 contains a brief
description of each feature.
CAS FEATURES
PART NUMBER
, BASIC UNIT | STUCK MIKE ALARM | ACARS COMPATIBLE
—0]01 | X [ X I X
RTA-83A VHF Communications Transceiver, Configurations Available
Figure 5
LB. 1183—1 p 4
23—20—03 £3797
Alliedsignal Commercial Avionics System:
MAINTENANCE MANUAL
RTA—83A VHF COMMUNICATIONS SYSTEM
FEATURE DESCRIPTION
Basic Unit Airborne solid—state RTA—83A is capable of receiving
and transmitting ARINC 566A voice and data over a
frequency range of 118.000 to 136.992 MHz with
8.33—kHz channel spacing or a frequency range of
118.000 to 136.975 with ZS—kHz channel spacing. The
basic unit has stuck~mike alarm and is compatible
with ACARS.
Stuck Microphone After the RTA—83A detects that the microphone is in
Alarm the transmit (keyed) position for a time duration
longer than 30 seconds, a rear—connector selectable
1 kHz interrupted tone (“A second on, V: second off)
is emitted for five seconds via the audio/sidetone
output. After a total of 35 seconds, the RlA—83A
turns off the transmitter and the 1 kHz interrupted
sidetone‘ To reactivate the transmitter, the
microphone push—to-talk button must be released and
then rekeyed. This feature can be disabled via
program pins on the rear connector.
ACARS Compatible The RTA—83A ensures proper processing of the Aircraft
Communications Addressing and Reporting System
(MRS) messages.
RTA—B3A VHF Communications Transceiver Features
Figure 6
1.8. 1183—1 P 5
23-20—03 £3797
AlliedSigml Commercial Avionics Systems
MAINTENANCE MANUAL
RTA—83A VHF COMMUNICATIONS SYSTEM
3. S stem Leadin Particulars
A. Unit Specifications
Figure 7 lists the leading particulars for the RTA483A VHF
Communications System.
I CHARACTERISTICS DESCRIPTION 1
[Eneral
Power Requirements 27.5 Vdc nominal (+1096, —20%)
1.0 ampere - Receive
5.5 ampere — Transmit
Weight 4,5 kg (9.9 lbs)
Dimensions Refer to outline drawing, figure 203
Form Factor V: ATR Short per ARINC Characteristic 404
Cooling Forced air per ARINC Characteristics 403/404
Temperature
Operating »55°C to +70°C (—67°F to +158°F)
Storage 455°C to +85°C (—85°F to +185°F)
Frequency Range and 118.000 MHz to 136.992 MHz with
Channel Spacing 8.33 kHz channel spacing
or
118.000 MHz to 136.975 MHZ with
25 kHz channel spacing
Frequency Selection Mark 2 2—out—of75 per ARINC 566Af7, or
Serial Digital per ARINC 429
Certification TSO C37d Class 3 and 5 and C38d Class C and E;
DO—lGDC Categories
/A2D2/ZCA/MNB/XXXXXXAAAZZUZ/X)(E2/XX
D0—186a, 007207. and EUROCAE ED—ZBB, ED—67
Transmitter
Output Power 25 watts (nominal)
Frequency Stability 10000594
Modulation Level 9016 modulation at 1000 Hz will be provided by J
|_ not more than 100 mVrms at the microphone input
Leading Particulars
Figure 7 (Sheet 1 of 3)
1.3.1183—1 23—20-03
Alliadsignal Commercial Avionie- Systems
MAINTENANCE MANUAL
RTA—83A VHF COMMUNICATIONS SYSTEM
CHARACTERISTICS
——-=_
DESCRIPTION
Transmitter (cont)
Audio Distortion
Frequency Response
Spurious Radiation
Harmonic Radiation
Receiver
Sensitivity
Frequency Stability
Selectivity
6.33 kHz
25 kHz
Cross Modulation
Intermodul ation
AGC
Audio Output
Audio Distortion
Audio Frequency
15% maximum at 9036 modulation (1000 Hz);
sidetone 7% maximum
Within 6 dB from 300 to 2500 Hz
Minimum of 110 dB from carrier level
Minimum of 60 dB from carrier level
6 dB S+N/N for 2 [JV (hard) signal modulated 3056
by 1000 Hz
19.0005‘56
12.78 kHz at 6 dB; 17.365 kHz at 60 dB
18 kHz at 6 dB; 17 kHz at 60 dB
Meets requirements of ARINC
Characteristic 566A, Section 3.7
Meets ICAO Annex 10, RTCA 00—186, and
EUROCAE ED—23B
Audio output will vary not more than 3 dB with
inputs 5 11V to 200 kuV and not more than 6 dB
to 500 ka
50 milliwatts minimum into a 200 ohm to 600 ohm
resistive load For 3096 modulation at 1000 Hz
with 1000 uV input signal modulated 3036 at
1000 Hz, total harmonic distortion will not
exceed 5%
Within 6 dB from 300 Hz to 2500 Hz
Response
Audio Output Less that 0.8 dB voltage change from a 10 ml}
Regulation reference level into 600 ohms for resistive
load variations of 200 ohms to 10,000 ohms
NOTE: This specification reflects
performance with a 20 ohm source
impedance over ARINC
Characteristic 566A load variations.
Leading Particulars
Figure 7 (Sheet 2)
I.B. 1183—1 Page 7
23—20-03 Jun/97
AlliedSignal Commercial Avionics Systems
MAINTENANCE MANUAL
RTA-SSA VHF COMMUNICATIONS SYSTEM
CHARACTERISTICS DESCRIPTION __J
Receiver (cont)
Spurious Rejection
Image Rejection
SELCAL/Data Output
SELCAL/Data Response
SELCAL/Data
Distortion
Phase Shift
AGC Attack/Del ay Time
LB‘ 118341
90 dB minimum
80 dB minimum
0.5 Vac into 600 (£036) ohm load for 30%
modulation at 1000 Hz
Less than 3 dB output variation from the
frequency range of 312 Hz to 1200 Hz and less
than 6 dB from 300 Hz to 6600 Hz
Less than 573 for a 1000 ”V input modulated 30%
at 1000 Hz producing 0.5 Vrms into 600 ohms
There is no phase inversion through the
receiver.
Less than 50 milliseconds
Leading Particulars
Figure 7 (Sheet 3)
23—20-03 3351793
Alliedsignal Commercial Avionics Sysiems
MAINTENANCE MANUAL
RTA—83A VHF COMMUNICATIONS SYSTEM
8. Environmental Certification
The RTA-BaA VHF Communications Transceiver meets the environmental
conditions of the Radio Technical Commission for Aeronautics (RICA)
document number DO—IGOC, "Environmental Conditions and Test
Procedures for Airline Electronic/Electrical Equipment and
Instruments.“ The environmental certification categories of the
RTA—83A are /AZD2/ZCA/MNB/XXXXXXAAAZZUZ/XXEZ/XX (See figure 8).
TEST 1 CATEGORY I
Temgerature and Altitude A202 I
In—Fligm: Loss of Cooling_ Z
Temperature Variation | C
Humidity A
Owtional Shocks and Crash Safeji Meets Specification
Vibration MNB
Explosion Proofness X
Hatermofness X
Fluids Suscgmbility X
Sand and Dust X
Fungus Resistance X
Salt SM X 1
M_agnetic Effect A
Power Input A
Voltage 5m | A
Audio Frequency Conducted Susceptibility — 1 Z
Poflgr lungs
Induced Signal Susceptibim | Z
Radio Frequency Susceptibility u
MamLmd Comm)
Emission of Radio Frfluency Energy_ Z
flhtnim Induced Transient Suscegtibility XXEZ
uglitning Direct Effects X
Iring_
Environmental Certification Categories of RTA-83A
Figure 8
LB. 1183—1 23—20-03 Page
4.
AlliedSing Commercial Avionics System:
System Descrigtion
MAINTENANCE MANUAL
RTA—83A VHF COMMUNICATIONS SYSTEM
The RTA—B3A VHF Communications System is an airborne VHF communications
system designed to provide dependabIe, cIear voice and data
conmunication between on—board aircraft systems to other aircraft
systems and to ground-b
channels of the 118.000 MHz to 136.992 MHZ band and
channeIs of the 118.000 MHz to 136.975 MHz band. F
simplified system biock diagram.
MICROPHONE —-———>
CONTROL
HEAD
—'——I
AIRCRAFT
POWER
SOURCE
aossmvsu
mc AUDIO
Fnzuuzncv
setzcnou
squelch
means
met:
as: m
. PROGRAMMING
11.1 vnc
wr
COMMUNICATVONS
ANTENNA
RTA-B3A
VHF
COMMUNICATIONS
TRANSCEIVER
ased systems in the assigned 8.337kHz spaced
25—kHz spaced
igure 9 is a
Aumo I
summons
snnL ADM
AND DATA LINK
——-———>
um mm
mm:-
uuvwo RELAY
unrme Ann
Dc clown
RTA783A VHF Communications System BIock Diagram
LB. 118341
Figure 9
23—20-03
Page 10
Jun/97
AlliodSignaI Commercial Avioniu Systems
MAINTENANCE MANUAL
RTA—83A VHF COMMUNICATIONS SYSTEM
5. System Component Description
A.
RTA—83A VHF Communications Transceiver
The RTA—83A VHF Communications Transceiver is a lightweight VHF
transmitter-receiver that provides aim operation in the 8.337kHz or
25—kHz spaced channels of the 118.000 MHZ to 136.992 MHz or
1180000 MHz to 1367.975 MHz Frequency band, respectively. Frequency
selection is entirely electronic; 3 two—out—offfive selection system
(described in ARINC Characteristic 566A—7) or a serial digital
frequency selection system per ARINC Characteristic 429 is used to
control the operation of the RTA—83A.
The RTA-83A is completely solid—state and is housed in an ‘/z ATR
short case per ARINC Characteristic 404. A handle is located on the
front panel of the RTA-83A to facilitate installation, removal, and
transport.
The RTA—83A operates in all aircraft cooling environments; however,
optimum reliability is obtained when cooling with forced air in
accordance with ARINC Characteristic 404.
An ITT/Cannon connector, type DPXZNA67318-26, is mounted at the rear
of the unit to provide the interface between the transceiver and the
system interconnect. Refer to figure 204 for the pertinent details.
The RTA-B3A is partitioned into four subassemblies: transceiver
assembly, analog/digital module, power supply, and rear interconnect
module (refer to figure 10).
Other Components in the System
other RTA—83A system components are not supplied by AlliedSignal
Commercial Avionics Systems. Information on these units must be
obtained from their respective manufacturers.
6. Operation
A.
General
The RTA—83A VHF Communications Transceiver provides dependable
twofway air to ground VHF communications in the assigned 8.33—kHz or
25-kHz spaced channels of the 118.000 to 136.992 MHz or 118.000 to
136.975 MHz frequency band, respectively.
Operation of the RTA—83A VHF Communications Transceiver is
controlled by a control unit which provides manual on/off control of
the system power, squelch threshold, and operating frequency.
LB. 1183—1 P 11
23—20—03 iii/97
AlliedSing Commercial Avionics Systems
MAINTENANCE MANUAL
RTA—83A VHF COMMUNICATIONS SYSTEM
VHF
COMMUNICATIONS
ANTENNA
w AMPLIFIER! wkzszgzcmn mmnm
nnscmfi ‘ .___ uleR men
A A
>- mnunmc
> 3 nun
A § ‘T—I
<— 0 sauna».
JW’D‘" _> g mnumolmu
<— E ‘fi
5 23353152, —. TRANsMn'rER
msmmm —. a _
rumnmcomnm
Fnzouzucv
SELECHON ’ _
ANALOG/DIGITAL TRANSCEIVER
MODULE ASSEMBLY
rum
zvsvnc msvnc
pm 3 3:55
_ usvrx:
RTA-83AVHF
COMMUNICATIONS
TRANSCENER
3055984VSD
RTA-BBA VHF Communications Transceiver, Simplified Block Diagram
Figure 10
LB. 1183-1 P 12
23-20-03 iii/97
AlliedSignaI Commercial Avionics Systems
MAINTENANCE MANUAL
RTA‘83A VHF COMMUNICATIONS SYSTEM
B. Basic Theory
(1)
(2)
(3)
(4)
LB. 1183—1
Transceiver Assembly
The transceiver assembly consists of an rf module assembly
configured as a standard double sideband amplitude modulated
(am) analog voice transceiver. When receiving, the PITA—83A rf
module amplifies and converts the rf signals received by the
antenna into analog signals for processing by the
analog/digital module. Conversely, when transmitting, the rf
module modulates the analog signals provided by the
analog/digital module into rf signals for transmission through
the antenna.
Analog/Digital Module
The detected output (received analog signals) from the rf
module is received by the analog section of the analog/digital
module where squelch and all audio processing and amplifying is
performed. The processed signals (data, voice, and sidetone
outputs) are fed through the rear interconnect module to the
aircraft audio circuits.
In the transmit mode, the microphone or data input is processed
by the analog/digital module and fed to the rf module where the
microphone or data input is modulated, amplified, and filtered
before being transmitted from the antenna.
The digital section of the analog/digital module checks tuning
information for validity, and converts it to the proper format
to tune the rf module synthesizers. The voice/data,
receive/transmit, and other discretes are also processed by the
digital section of the analog/digital module.
Power Supply Module
The 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 RTA—BBA.
Rear Interconnect Assembly
To 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 RTA-83A. The
signal and power cables are filtered by using discrete and
distributed filter elements and limiting devices on the rear
interconnect module located inside this HIRF compartment. The
filtered lines are then fed to the appropriate points in the
RTA783A.
Page 13/14
23-20—03 Jun/97
Alfiedsignfl Comm-mil Ain'onka Syslems
MAINTENANCE MANUAL
RTA—63A VHF COMMUNICATIONS SYSTEM
FAULT ISOLATION
General
Fault 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—BSA VHF Comunications System includes a
continuity check of the interwiring and the assurance that proper
installation techniques and procedures have been followed.
A complete functional test of the system can be performed as described in
paragraph 7.8. in the "Maintenance Practices“ section 200 of this manual.
System performance can also be determined by communications with ground
facilities when available‘ If necessary, replace the RTA783A VHF
Comunications Transceiver with a known good unit.
LB. 1183—1 P 101 102
23-20—03 a“ Jug/97
2.
Allledsigml Commercial Avionics Systems
MAINTENANCE MANUAL
RTA-83A VHF COMMUNICATIONS SYSTEM
MAINTENANCE PRACTICES
Genera]
This section of the manual provides service personnel with installation
and maintenance information for the RTA-83A VHF Communications System.
Installation instructions are supported by mechanical outline drawings
and an 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.
Inspection After Unpacking
CAUTION: THIS EQUIPMENT CONTAINS ELECTROSTATIC DISCHARGE SENSITIVE
(ESDS) DEVICES. EQUIPMENT, MODULES, AND ESDS DEVICES MUST BE
HANDLED WITH APPROPRIATE PRECAUTIONS.
Visually inspect the RTA—83A VHF Communications 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.
An AlliedSignal Commercial Avionics Systems (CAS) 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
quality report portion of the tag and return it to the AlliedSignal
Commercial Avionics Systems (CAS), Quality Assurance Department, Fort
Lauderdale, Florida. This portion of the tag provides 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.
I.B. 1183—1 P 201
23-20-03 “gin/97
AlliedSing Commercial Avionics Systems
MAINTENANCE MANUAL
RTA783A VHF COMMUNICATIONS SYSTEM ~
3. Preinstallation Testing
The components in the RTA-83A VHF Communications 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 Marking
AlliedSignal Commercial Avionics Systems 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. Interchangeability
The RTA—SSA VHF Communications System will operate in any installation
that complies with ARINC characteristic 566A. Refer to system
interwiring diagram figure 204 for particulars.
Note: Contact Original Equipment Manufacturer (OEM) for certification
status.
6. Installation
A. General
The RTA-83A VHF Communications 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 204.
B. Location of Equipment
Location of the RTA—83A VHF Communications 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—83A VHF Communications
LB. 1183—1 P 202
23-20—03 “gin/97
AlliedSignal Commem'nI Avionics Systems
MAINTENANCE MANUAL
RTA~83A VHF COMMUNICATIONS SYSTEM
Transceiver in accordance with ARINC Characteristic 404A. The
associated cooling equipment must be mounted in accordance with the
manufacturer’s instructions.
The RTA—B3A can use the existing MTA-43A Mount or any other
equivalent mounting tray that is compatible for securing a unit
meeting the '/a ATR short form factor per ARINC Characteristic 404.
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—83A VHF Communications Systems 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 unit 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.
Control unit location and mounting can be determined by mutual
agreement between the user and airframe manufacturers
C. Interwiring and Cable Fabrication
(1) General
Figure 204 is a complete interwiring diagram for a single
RTA—83A VHF Communications System and associated components.
This diagram requires thorough study before the installer
begins installation of the aircraft wiring.
When two systems are being installed in the aircraft, the
interconnecting wiring shown in figure 204, as well as all
other installation instructions must be duplicated.
Cabling must be fabricated by the installer in accordance with
figure 204. Hires connected to parallel pins should be
approximately the same length, so that the best distribution of
current can be effected. AlliedSignal Commercial Avionics
System recommends that all wires, including spares, shown on
interwiring diagram figure 204 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 test connector assembly is removed. A
bend should be made in the harness near the connector
I.B. 1183—1 P 203
23—20-03 agfin/W
AlliedSlgnal commerc'ul Avionics Syflems
MAINTENANCE MANUAL
RTA-83A VHF COMMUNICATIONS SYSTEM
to allow water droplets, that might form on the harness
from condensation, to drop off at the bend and not
collect at the connector.
when 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’ 5 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.
The following determinants are the responsibility of the
installation agency for fabrication of the wiring harness, see
figures 20] and 204.
r PIN NO. TYPE SIGNAL NAME | FUNCTION
TPAl — Reserved For 566 function
TPI InLut DC Ground Aircraft and DC Ground
TPZ Input DC Ground Aircraft and DC Ground
Required for ARINC 566A VHF
COMM. Use a standard
lO—ampere circuit breaker in
the main power lead,
DC Power Input
+27.5 VDC
DC Power Input
+27.5 VDC
Input
RlA—83A VHF Communications Transceiver Connector Determinants
Figure 201 (Sheet 1 of 6)
1.8.1183—1 23—20-03
Alliedsigml Commutial Avionies Systems
MAINTENANCE MANUAL
RTA—83A VHF COMMUNICATIONS SYSTEM
SIGNAL NAME
Switched +27.5 VDC
Switched +27.5 VDC
Reserved
Remote On/Off
Muting Relay - N.C
Reserved
Reserved
SELCAL Audio and
Data Link Output
HI)
SELCAL Audio and
Data Link Output
(L0)
Reserved
Freq Port Select
Reserved
Squelch Override
Monitor
Muting Relay — N‘O.
Muting Relay — Arm
Primary AGC Monitor
_|
L_
FUNCTION
On/Off function on pin TP9
supplies +27.5 VDC output from
pins TP3 and TP4
For monitoring AGC output
(Factory test only.)
For 566 function
When power is applied to pins
TP3 and TP4, grounding pin TP9
energizes the RTA—83A and also
provides switched +27.5 VDC on
pins TPS and TPG.
Customer Optional Use — Some
users utilize the muting relay
contacts within the
transceiver to transfer the
audio system from "receiver
output" to "sidetone output"
when the transmitter
push—toftalk is energized.
For 546/566 function
For 546/566 function
An analog output to provide
2400 bps MSK data to the ACARS
MU. May also be used for
SELCAL provisions.
For 546/566 function
Discrete input selects
frequency port for 429 tuning
find/Low = Port A selected,
Open/High = Port B selected.
(Required for 429 tunings)
For 556 function
Monitors squelch override
status
(Factory test onlytz
RTA—83A VHF Communications Transceiver Connector Determinants
Figure 201 (Sheet 2)
1183-1
1.8.
23—20-03
Page 205
Jun/97
AlledSignal Commml Avioniu System
MAINTENANCE MANUAL
RTA—83A VHF COMMUNICATIONS SYSTEM
PIN NO. TYPE SIGNAL NAME FUNCTION
A discrete input pair prewired
TPZl Input SDI Bit 0 Program
at the rear connector to
identify the specific VHF Comm
TPZZ 501 Bit 1 Program Iocation in the aircraft.
Reauired for 429 tunin.
TP23 SDI Prog Pin Common Ground for the SDI code inputs
Re-uired for 429 tunin-.
TP24 — Reserved For 546 566 function
Reserved For Four—Wire MIC PTT Return
Data Link Audio An anaioq input to provide
audio and 2400 bps MSK data to
the ACARS MU. May also be
used for SELCAL provisionst
Reserved
Data Link Key
Keys transmitter in data mode
Mic Audio (HI) Microphone audio input. Part
of the standard four—wire
microphone interwiring as
described in Attachment 2 of
TP31 Input Mic Audio Return/PIT
ARINC 566A.
_— Reserved For 566 function
TP33 Freq/Funct Select One of two Iow speed 429 input
Data I P Port A A ports to provide frequency
Input
tuning data.
Freq/Funct Seiect R - d f 429 t 4 .
Data I/P Port A (B) ( “um °r "mg )
Reserved For 566 function
TP36 — Reserved For 566 function
Freq/Funct Select One of two "low speed 429 input
Data I P Port B A ports to provide frequency
tuning datac
Freq/Funct Se’Iect R - d f 429 t ~ .
Data I/P Port B (a) ( equwe “r “m"9 )
Reserved For 546/566 function
RTAv83A VHF Communications Transceiver Connector Determinants
Figure 201 (Sheet 3)
LB. 1183-1 P 206
23—20-03 335W
AlliedSignal Commercial Avionics Syslems
MAINTENANCE MANUAL
RTA—83A VHF COMMUNICATIONS SYSTEM
Input/
Input
Input
SIGNAL NAME
Antenna RF
Output Ingut/Output
Frequency Select A
10 MHZ
Frequency Select 8
10 MHZ
Frequency Select C
10 MHZ
Frequency Select D
10 MHZ
Frequency Select E
10 MHZ
Frequency Select A
1 MHz
Frequency Select E
1 MHz
Reserved
Frequency Select C
1 MHz
Frequency Select D
1 MHz
Frequency Select E
1 MHz
Frequency Select A
0.1 MHz
Frequency Select B
0.1 MHZ
Max. Trans Cutoff
—T
Coaxial connection to RF
antenna
FUNCTION
Provides frequency selection
of 10 MHZ to 90 MHz
Not Required
Not Required
Not Required
Provides frequency selection
of I to 9 MHz
For 546/566 function
Provides frequency selection
of 1 to 9 MHz
Provides frequency selection
of 0.1 to 0.9 MHz
Discrete input that enables
the maximum transmit cutoff
function:
Gnd/Low = Cutoff disabled,
Open/HighA:_§utoff enabled.
RTA—83A VHF Communications Transceiver Connector Determinants
Figure 201 (Sheet 4)
1.8.
1183—1
23-20-03
Page 207
Jun/97
AlliedSignal Commercial Avionics Systems
MAINTENANCE MANUAL
RTA783A VHF COMMUNICATIONS SYSTEM
FUNCTION
PIN NO. TYPE SIGNAL NAME
Provides frequency selection
Input
of 0.1 to (L9 MHZ
Frequency Select C
0.1 MHZ
Frequency Select D
0.1 MHZ
Frequency Select E
0.1 MHZ
Frequency Select A
0.01 MHZ
Frequency Select 8
0.01 MHZ
Reserved —| For 566 function
Frequency Select C Provides frequency selection
0.01 MHZ of 0.01 to 0.09 MHZ.
IHPUt Frequency 5919“ D Pin BP23 provides a discrete
001 MHZ output that indicates the unit
Output Frequency Select E is capable Of 3-33 kHz or
Provides frequency selection
of 0.01 to 0.09 MHz
0.01 MHz/8.33 kHZ 25 kHz modes of operation.
Program
Input Time Out Timer Ground for 1 kHz Intermittent
(T.0.T.) Tone Tone for 5 seconds at maximum
transmit time out
- Reserved For 566 function
— Reserved For 546/565 function
Provides frequency selection
common
BP27 Input Frequency Select
Common
(ind/Low = 2 x 5 tuning,
0 en Hi h = 429 tuning.
Sidetone Output (HI) Provides a IODO—HZ sidetone
output during voice transmit
Sidetone Output (L0) 4 mode
Squelch Disable (HI)
A discrete input to provide
squelch override or disable
Squelch Disable (L0) capability,
Reserved For 566 function
RTA—83A VHF Communications Transceiver Connector Determinants
Figure 201 (Sheet 5)
Page 208
1.5. 1133-1 23_20_03 Jun/97
AlliedSignal Commercial Avionics System:
MAINTENANCE MANUAL
RTA—83A VHF COMMUNICA IONS SVSTEM
[PIN N0.J TYPE SIGNAL NAME FUNCTION
Reserved For 566 function
Audio Output (CT) For 546/566 function
Provides an audio output for
“le Output (HI receiver audio during receive
Output Audio OutBut gm) me
A Reserved For 546/566 function
- Reserved For 546/566 function
— Reserved For 546/566 function
RTA—83A VHF Communications Transceiver Connector Determinants
Figure 201 (Sheet 6)
(2) Reserved and Spare Hires
If 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 figure 204.
D. Installation of System
(1) Mounting Base
The RTA—83A VHF Communications System units are secured in the
airframe with mounting trays that can accommodate a unit that
conforms to ‘/z ATR short form factor per ARINC Characteristic
404. The mounts are designed to be removed without rewiring
the connectors.
Dimensions for locating the mounting holes should be in
accordance with the manufacturer’s instructions for the
mounting tray being used. when locating the mounts in the
aircraft, allow at least one inch (2.54 centimeters) of free
space on the top and sides of the unit. This will provide
sufficient clearance for sway and ease of removal. Clean all
mounting surfaces prior to positioning the mount in the desired
location.
LB. 1183—1 P 209
23-20-03 agin/97
LB.
(2)
(3)
(4)
1183—1
AlliedSigml Commercial Avionics Systems
MAINTENANCE MANUAL
RTA—83A VHF COMMUNICATIONS SYSTEM
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.
RTAA83A VHF Communications Transceiver
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.
The RTA—B3A VHF Communications Transceiver is installed in the
mount as follows:
(a) Slide the RTA—83A into the mount until the guide pins are
aligned and the electrical connectors are firmly engaged.
(b) Secure the front of the RTA—83A 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.
(c) Safety—wire the two screw clamps.
VHF Communications Control Panel
The selected ARINC 566A VHF Communications control panel should
be wired according to system interwiring diagram figure 204 and
the manufacturer’s instructions. For installation procedures
and mounting dimensions, refer to the manufacturer’s
instructions.
VHF Communications Antenna
The selected ARINC 566A VHF Communications antenna should be
wired according to system interwiring diagram figure 204 and
the manufacturer’s instructions. For installation procedures
and mounting dimensions, refer to the manufacturer‘s
instructions.
23—20-03
AlliedSignal Commercial Avionics Systems
MAINTENANCE MANUAL
RTA—83A VHF COMMUNICATIONS SYSTEM
7. Inspectioland System Check Procedures
NOTE: Inspection and check procedures for the RTA—83A VHF
Communications System inciudes checkout of all interfacing
units that may affect performance of the RTA—83A.
A. Inspection
figure 202 is a visuai inspection check procedure and shoUd be
performed after system instaiIation, prior to system checkout. In
addition, the procedure shouid be used as a periodic inspection
check.
EQUIPMENT | INSPECTION/CHECK PROCEDURE
1/1 ATR Short As defined by manufacturer’s instructions.
Unit Mount
RTA—83A VHF (1) Check that unit is fully inserted in mount and that
Transceiver the knurled screw cIamps which secure the unit in
the mount are ti ht and safet wired.
(2) Inspect the case for deformation, dents, corrosion,
and damage to finish; ensure that ventilation hoIes
in the unit are not clogged.
As defined by manufacturer’s instructions.
ARINC 565A
Controi Pane'l
ARINC 566A
VHF Antenna
As defined by manufacturer’s instructions.
Inspecti on/Check Procedures
Figure 202
B. System Checkout
(1) Generai
After instaflation of the RTA—SSA VHF Communications System,
and inspection of the equipment per previous figure 202,
perform a continuity and visuaI check of the system interwiring
per paragraph 7.B.(2). A post—instailation test per paragraph
7.B.(3) should then be performed.
Page 211
1.5. ”83—1 23_20_03 Jun/97
LB.
(2)
(3)
1183-1
AlliedSignal Commercial Avioni- Systems
MAINTENANCE MANUAL
RTA—83A VHF COMMUNICATIONS SYSTEM
System Interwi ring Check
Visually 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)
(b)
(6)
14)
Check that the RTA—EZA is properly installed and the
hold—down screw clamps are tight.
Check wiring harness connectors for security and
connection to the RTA—83A.
Check that antenna transmission line connectors are
securely fastened.
Check that cables do not interfere with aircraft controls
or other equipment.
Post—Instal l ation Check
(a)
(b)
Test Equipment Required
None Required.
System Test
I Establish the initial control settings listed below.
ARINC 566A CONTROL POSITION
Power on
Frequency Selector Tune to any local VHF frequency
Volume Control midway
g Using the system’s headphone (or speaker) and
microphone, check operation of the RTA—83A VHF
Transceiver.
3 Key the microphone and speak into it; speech should be
audible.
5 Listen through the headphones (or speaker) and press
the SQUELCH DISABLE pushbutton. A squelch break should
be audible through the headphones.
23—20-03
Alliedsignal Commercial Avionics systems
MAINTENANCE MANUAL
RTAfBSA VHF COMMUNICATIONS SYSTEM
5 As soon as possible, local flight check should be made
to verify system operation for both local and distant
stations.
C. Flight Tests
(1) Preflight Test
(a) General
The following test procedure gives instructions for a
preflight test which ensures that the RTA-83A VHF
Communications System is functioning in an acceptable
manner prior to takeoff.
(in) Test Procedures
Repeat the test procedure found in paragraph 7.B‘(3)(b).
(2) In—Flight Confidence Test
Upon 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.Bt(3)(b)‘
8. Removal and Replacement
A. Removal
(1) Loosen the two knurled screw clamps (located on the front of
mount) that secure the RTA—83A to the mount.
(2) Gently pull the transceiver forward until it is disconnected
from the rear connector and guide pins.
B. Replacement
(1) Slide the RTA—83A onto the tray of the mount and then gently
push the transceiver 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 transceiver.
(3) Safety wire the two knurled screw clamps‘
Page 213
LB. 1183—1 23_20_O3 Jun/97
AlliedSignal Commercial Avionics Systems
MAINTENANCE MANUAL
RTA—83A VHF COMMUNICATlONS SYSTEM
9. Maintenance Procedures
A. Adjustments and Alignments
There are no adjustments or alignments required for the RTA-83A VHF
Communications 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 component maintenance manual when unit performance indicates
an adjustment or an alignment is required.
B. System Protection
The system should be protected by a lO—ampere circuit breaker
located at the circuit breaker panel in the aircraft.
C . Lubrication Practices
There are no requirements for periodic lubrication of any RTA—83A
VHF Communications System components while mounted in the aircraft.
Reference should be made to the applicable component maintenance
manual for lubrication procedures during routine maintenance of ,,
individual units. Refer to figure 4 in "Description and Operation"
section 1 for a list of related component maintenance manual
publications.
D. Cleaning
when 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—83A VHF Communications
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.
I‘B. 118341 P 214
23—20—03 3331/97

---

Source Exif Data:

File Type                       : PDF
File Type Extension             : pdf
MIME Type                       : application/pdf
PDF Version                     : 1.2
Linearized                      : Yes
Create Date                     : 2001:05:12 11:28:43
Producer                        : Acrobat Distiller 4.0 for Windows
Modify Date                     : 2001:05:12 11:28:44-04:00
Page Count                      : 40

EXIF Metadata provided by EXIF.tools