Honeywell RTA-83B User Manual 8

Download:
Mirror Download [FCC.gov]
Document ID	75847
Application ID	KVrlqL0dZ5y6UkcyPQEOHA==
Document Description	8
Short Term Confidential	No
Permanent Confidential	No
Supercede	No
Document Type	User Manual
Display Format	Adobe Acrobat PDF - pdf
Filesize	63.02kB (787794 bits)
Date Submitted	1999-12-14 00:00:00
Date Available	1998-10-06 00:00:00
Creation Date	2001-05-12 13:05:06
Producing Software	Acrobat Distiller 4.0 for Windows
Document Lastmod	2001-05-12 13:05:08
Document Title	8

AllhdSigr-I Cunard-I Avionics Sync-m
Maintenance Manual
RTA-83B
VHF Communications
System
T—l
13. 1183—2 23_20_04 Aug/97
Alliedsignal Commercial Avioniel Systems
NOTE
IF ANY UNUSUAL OR SPECIAL SERVICE PROBLEMS ARISE,
CONTACT ALLIEDSIGNAL COMMERCIAL AVIONICS SYSTEMS
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 manufacA
turing purposes without written permission
from MIiedSi-nal Inc.
23—20—04 NO SE
Alliedsigml Commem'nl Avionics Systems
MAINTENANCE MANUAL
RTA—83B VNF COMMUNICATIONS SYSTEM
RECORD OF REVISIONS
REVISION DAVE
DAVE IMSER'ED
REVISION DATE
DAYE INSERTED BY
"II?
>_- I
on
23-2 -04 No 35;
AlliedSing Commercial Avionics Systems
MAINTENANCE MANUAL
RTA—83B VHF COMMUNICATIONS SYSTEM
RECORD OF REVISIONS
REV. REVISIN DATE EV REV. REVISION DATE BY
nu. DATE INSERTS!) no. DATE INSEHTED
1.8. 1183-2 23_20_O4 n SR?
Alfiedsinnll Cowmlerc'ul Avioniu Systems
MAINTENANCE MANUAL
RTA—83B VHF COMMUNICATIONS SYSTEM
LIST OF EFFECTIVE PAGES
SUBJECT P GE ATE SUBJECT P SE B TE
Title Page T—l Aug/97 206 Aug/97
207 Aug/97
Proprietary PN—l No Date 208 Aug/97
Notice 209 Aug/97
210 Aug/97
Record of RR—l No Date 211 Aug/97
Revisions RR—2 No Date 212 Aug/97
213 Aug/97
List of LEP—l Aug/97 214 Aug/97
Effective LEP-Z Blank F 215 Aug/97
Pages F 216 Blank
F 217 Aug/97
Table of TC—1 Aug/97 F 218 Blank
Contents TC—Z Blank
Introduction INTRO—1 Aug/97
Description 0 Aug/97
and Operation 1 Aug/97
2 Aug/97
3 Aug/97
4 Aug/97
5 Aug/97
6 Aug/97
7 Aug/97
8 Aug/97
9 Aug/97
10 Aug/97
11 Aug/97
12 Aug/97
13 Aug/97
14 Aug/97
Fault Isolation 101 Aug/97
102 Blank
Maintenance 201 Aug/97
Practices 202 Aug/97
203 Aug/97
204 Aug/97
205 Aug/97
* INDICATES PAGES REVISED, ADDED OR DELETED IN LATEST REVISION
F INDICATES FOLDOUT PAGES — PRINT ONE SIDE ONLY
1.8. 1183—2 LEP-l/LEP—Z
23'20“O4 Aug/97
Alliedslgnal Commercial Avionim Systems
MAINTENANCE MANUAL
RTA—8SB VHF COMMUNICATIONS SYSTEM
TABLE OF CONTENTS
garagranhflifle P_agg
DESCRIPTION AND OPERATION ....................... 1
FAULT ISOLATION ........................... 101
MAINTENANCE PRACTICES ........................ 201
1.3. 1183-2 TC—l TC—2
23-20-04 nag/97
I.B.
1183-2
AniedSigrul Commencial Avionlu Sysnms
MAINTENANCE MANUAL
RTA—83B VHF COMMUNINCATIONS SYSTEM
INTRODUCTION
This manual, LB. 1183—2 (23-20-04), contains
information covering description and operation,
installation, and checkout procedures for the
AlliedSignal Commercial Avionics Systems RTA—83B
VHF Communications System.
23-20-04
INTRO—1
Aug /97
LB.
1183-2
Alliedsignal Commercial Avionics Symems
MAINTENANCE MANUAL
RTA—83B VHF COMMUNICATIONS SVSTEM
8055988
DD
RTA—83B VHF Communicaticms Transceiver
Figure 1
23-20—04
Page 0
Aug /97
AlliedSignal Commercial Avioniu Systems
MAINTENANCE MANUAL
RTA—SBB VHF COMMUNICATIONS SYSTEM
DESCRIPTION AND OPERATION
1. General
This section contains descriptive information covering the RTA—83B VHF
Communications System and lists other components required for system
operation. The RTA—83B VHF Communications Transceiver is illustrated in
figure 1.
A. Purpose of Equipment
The RTA—83l3 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—ESB has two
basic types of operation: standard double sideband am analog voice
communications and MSK (minimum shift keying) data capability.
The RTA-83B VHF Communications Transceiver (shown in figure 1)
conforms to industry standards: Aeronautical Radio Incorporated
(ARINC) 716—8 Airborne VHF Communications Transceiver, ARINC 429—14
Mark 33 Digital Information Transfer System, Radio Technical
Commission for Aeronautics (RTCA) documents number 00—185a 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~May 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—67 Minimum
Operating Performance Specification for Devices that Prevent
Unintentional or Continuous Transmissions.
The RTA—BBB is fully interchangeable with the earlier ARINC 716
RTA—44A VHF Communications Transceivers for backward compatibility.
The RTA-SBB 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. The system may
also be connected to a Central Fault Display System (CFDS).
LB. 1183-2 P 1
23-20—04 £3797
AlliedSignaI Commercial Avionics Systems
MAINTENANCE MANUAL
RTA—SSB VHF COMMUNICATIONS SYSTEM
Depending upon the selected mode, the RTA—SBB operates with the
following equipment:
0 an ARINC 618 ACARS MU or ARINC 758 CMU,
0 an ARINC 604 and Airbus Industrie ABD—0018 Centralized
Fault Display Interface Unit (CFDIU), or ARINC 624 Onboard
Maintenance System (OMS),
0 an ARINC 716-8 voice audio input source and output sink,
0 an ARINC 716—8 voice frequency control source,
0 an antenna.
B. Equipment Part Numbers
Components of the RTA—B3B 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, a ong with part numbers and equipment type numbers.
EQUIPMENT
TYPE NUMBER EQUIPMENT DESCRIPTION |__PART NUMBER
RTA—83B VHF Airborne VHF communications 064750002-0101
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 D0—207
"stuck mic" detection which
selectively emits a l—kHz
interrupted warning sidetone during
last five seconds of 35—second
transmission.
Meets DOAIGOC HIRF and lightning
protection requirements and ZOO—ms
power interrupt transparency
requirements. Meets ICAO Annex 10
FM interference immunity.
Capable of interfacing CFDS Airbus
|_ lndustrie Aooeoois.
RTA783B VHF Communications System Components (CAS Supplied)
Figure 2
LB. 1183—2 P 2
23—20—04 £3797
AlliedSignal Commercial Avionics Systems
MAINTENANCE MANUAL
RTA483B VHF COMMUNICATIONS SYSTEM
C. Equipment Required but Not Supplied
Figure 3 lists equipment required for the RTA—83B system, but not
supplied by AlliedSignal Commercial Avionics Systems.
Power Source
Audio Distribution
System
ARINC Characteristic
716—8 Control Panel
MU/CMU
3 MCU Unit Mount
VHF Antenna
Cables and Connectors
EQUIPMENT
Diagram, figure 204.
DESCRIPTION
DC power supply of 27.5 volts, 1.0 ampere
nominal during reception and 8.0 amperes
maximum during transmission.
Audio system with an input impedance of 200 to
10,000 ohms.
Provides remote control of frequency selection
for 8.33—kHz or ZS—kHz channel spacing system
operation (serial digital, ARINC 429—14)
power, on/off, volume, and squelch control.
Provides control and data source/sink when
operating in the data mode.
Provides a means of mounting RTA—83B 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-BBB VHF Communications System Interwiring
Equipment Required but Not Supplied
LB. 1183—2
Figure 3
23-20—04 3359?
AlliedSignal Commemial Avionic- Systems
MAINTENANCE MANUAL
RTA—B3B VHF COMMUNICATIONS SYSTEM
D. Related Publications
Figure 4 lists the publications covering the RTA—SSB VHF
Communications System.
CAS ATA ‘
IDENTIFICATION IDENTIFICATION
NUMB ER NUMBER
RTA—B3B VHF Conununications Transceiver LB‘ 11836 23—20-40
l_C-onent Maintenance Manual
Related Publications
Figure 4
2‘ Configurations Available
Figure 5 lists the available configurations of the RTA—SSB and the
features contained in each configuration. Figure 6 contains a brief
description of each feature
FEATURES
CAS
PART NUMBER BASIC
S UCK OHPA I I I
IBI L
064-50002 UNI “E'ORI LARM
-0101 x _L_x 1__x
RTA783B VHF Communications Transceiver, Configurations Available
Figure 5
Page 4
LB. 1183—2 23-20'04 Aug/97
Basic Unit
Fault Memory
Stuck Microphone
Al arm
ACARS Compatible
CFDS Compatible
Andehn-lconnnathlAfionksSynema
MAINTENANCE MANUAL
RTA-83B VHF COMMUNICATIONS SYSTEM
DESCRIPTION
Airborne solid—state RTA—83B is capable of receiving
and transmitting ARINC 716-8 voice over a frequency
range of 118.000 to 136.992 MHz with 8.33—kHz channel
spacing. The unit is also capable of receiving and
transmitting ARINC 716—8 voice and data over a
frequency range of 118.000 to 136.975 MHz with 25—kHz
channel spacing. The basic unit has fault memory,
stuck mike alarm, and is compatible with ACARS and
CFDS features.
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 RTA—83B detects that the microphone is in
the transmit (keyed) position for a time duration
longer than 30 seconds, a rear connector selective
l-kHz interrupted tone (V: second on, V: second off)
is emitted for five seconds via the audio/sidetone
output. After a total of 35 seconds, the RTA—ESB
turns off the transmitter and the l-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.
The RTA—ESB ensures proper processing of the Aircraft
Communications Addressing and Reporting System
(ACARS) messages.
The RTA—BBB interfaces fault memory and BITE data
between the RTA—83B and line maintenance Centralized
Maintenance Computer (CMC) for the purpose of
extracting maintenance information and initiating
tests‘ Designed to conform with Airbus lndustrie
ABD-0018.
RTA—83B VHF Communications Transceiver Features
1.8. 1183—2
Figure 6
23-20-04 £3379?
Alli-6mm Commercial Avioniu Symon:
MAINTENANCE MANUAL
RTA—BSB VHF COMMUNICATIONS SYSTEM
System Leading Particulars
A. Unit Specifications
Figure 7 lists the "leading particulars for the RTA—83B VHF
Communications System.
CHARACTERISTICS DESCRIPTION
General
Power Requirements 27.5 Vdc nominal (+1036, —20%)
1.0 ampere — Receive
5.5 ampere A Transmit
Height 4,0 kg (8.8 lbs)
Dimensions Refer to outline drawing, figure 203
Form Factor 3 MCU per ARINC Characteristic 600
Cooling Forced air per ARINC Characteristic 600
Temperature
Operating -55°C to +70°C (—67°F to +158°F)
Storage —65°C to +85°C (—85°F to +185°F)
118.000 MHZ to 136.992 MHZ with
8.33 kHz channel spacing
or
118.000 MHz to 135.975 MHz with
25 kHz channel spacing
Serial Digital per ARINC Specification 429
150 C37d Class 3 and 5 and C38d Class C and E;
D07160C Categories
[AZDZ/ZCA/MNB/XXXXXXAAAZZUZ/XXEZ[XX
DO—ISSa, 00—207, and EUROCAE ED—23B, ED—67
Frequency Range and
Channel Spacing
Frequency Selection
Certification
Transmitter
25 watts (nominal)
10000556
90% modulation at 1000 Hz will be provided by
not more than 100 mVrms at the microphone in ut
Output Power
Frequency Stability
Modulation Level
Leading Particulars
Figure 7 (Sheet 1 of 3)
LB. 1183—2 P 6
23-20—04 Afigiw
AllieGSing Cunnnemhl Avionics Svalom:
MAINTENANCE MANUAL
RTA—83B VHF COMMUNICATIONS SYSTEM
CHARACTERISTICS
Transmitter (cont)
Audio Distortion
Frequency Response
Spurious Radiation
Harmonic Radiation
Receiver
‘ Sensitivity
Frequency Stability
Selectivity
8.33 kHz
25 kHz
Cross Modulation
lntermodul ation
AGC
Audio Output
Audio Distortion
Audio Frequency
Response
Audio Output
Regulation
LB. 1163-2
DESCRIPTION
10% maximum at 9054 modulation (1000 Hz);
sidetone 7% maximum
Within 6 dB from 300 to 2500 Hz
Minimum of 110 dB from carrier level
Minimum of 100 dB from carrier level
6 dB S+N/N for 2 11V (hard) signal modulated 3054
by 1000 Hz
10.000595
i2‘7B kHz at 6 dB; fl.365 kHz at 60 08
1:8 kHz at 6 dB; 5:17 kHz at 60 dB
Meets requirements of ARINC
Characteristic 716—8, Section 3.6.4
Meets ICAO Annex 10, RTCA 00—186a, and
EUROCAE ED723B and ED767
Audio output will vary not more than 3 dB with
inputs 511V to 200 kyV and not more than 6 dB
to 500 kuV
50 milliwatts minimum into a 200 ohm to 600 ohm
resistive load for 3056 modulation at 1000 Hz
With 1000 ”V input signal modulated 3054 at
1000 Hz, total harmonic distortion will not
exceed 5%
Within 6 dB from 300 Hz to 2500 Hz
Less that 0.8 dB voltage change from a 10 mW
reference level into 600 ohms for resistive
load variations of 200 ohms to 10,000 0th
NOTE: This specification reflects
performance with a 20 ohm source
impedance over ARINC
Characteristic 716—8 load variations.
Leading Particulars
Figure 7 (Sheet 2)
23-20-04 23:79;
AliedSigml Cami-I Avionics Synams
MAINTENANCE MANUAL
RTA—B3B VHF COMMUNICATIONS SYSTEM
CHARACTERISTICS DESCRIPTION 3
Receiver (cont)
Spurious Rejection 90 dB minimum
80 dB minimum
0.5 Vac into 600 (12096) 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 5% for a 1000 uV input modulated 3036
at 1000 Hz producing 0.5 Vrms into 600 ohms
There is no phase inversion through the
receiver.
Image Rejection
SELCAL/Data Output
SELCAL/Data Response
SELCAL/Data
Distortion
Phase Shift
AGC Attack/Delay Time Less than 50 miIIiseconds
Leading Particulars
Figure 7 (Sheet 3)
"B' 23-20-04 23:59?
AlledSignnI Commercial Avioniu Symms
MAINTENANCE MANUAL
RTA—83B VHF COMMUNICATIONS SYSTEM
8. Environmental Certification
The RTA—saB VHF Cormnunications Transceiver meets the environmental
conditions of the Radio Technical Commission for Aeronautics (RTCA)
document number DO—IGOC, "Environmental Conditions and Test
Procedures for Airline Electronic/Electrical Equipment and
Instruments." The environmental certification categories of the
RTA—83B are /A2[)2/ZCA/MNB/XXXXXXAAAZZUZ/XXEZ/XX (see figure a). The
RTA—83B also meets 18—hour "no cooling—air test.“
CATEGORY
Temperature and Altitude
In-Flight Loss of Cooling
Temperature Variation
Humidity
Operational Shocks and Crash Safety
Vibration
Explosion Proofness
Haterproofness
Fluids Susceptibility
Sand and Dust
——
5m Spray —
=n
Power Input
Voltage Spike
Audio Frequency Conducted Susceptibility —
Power In-uts
Induced Signal Susceptibility
Radio Frequency Susceptibility
Radiated and Conducted)
Emission of Radio Frequency Energy
Lightning Induced Transient Susceptibility XXEZ L
Lightning Direct Effects “
Environmental Certification Categories of RTA—83B
Figure 8
1.5. 1183-2 23_20_04 233i;
4.
LB.
Minn-I mutual Avionic- Systems
MAINTENANCE MANUAL
RTA—BEIB VHF COMMUNICATIONS SYSTEM
System Description
The RTA—83B VHF Communications System is an airborne VHF communications
system designed to provide dependable, clear voice and data
cumunication between on—board aircraft systems, to other aircraft
systems, and to ground—based systems in the assigned 8.33~kHz and 25—kHz
spaced channels of the 118.000 MHZ to 136,992 MHz band and 118.000 MHz
to 136.975 MHz band, respectively. Figure 9 is a simplified system
block diagram.
var
ccmumcmons
AmsNNA
KEY EVENT FLIGHT
mo mule RECORDER
MICROPHONE m"
was.
mm»:
mm inn
__vP Pow—M fl—s
sanchu
CONTROL mm ”My; mum“,
HEAD I AM! DATA LINK
I.” KHZ VHF
"M COMMUNICATIONS
TRANSCEIVER “WWW
‘___S*'““ I?&’.’¢lfifé§%§“'°“‘
AIRCRAFT sg‘uacenssmmmnsmm
POWER —————>|""""‘ —
SOU RCE —-
4M ::::Lfn";¢:§::-sm,
VWEISELECT,
VSDEDSSW AIRFMME AND
ac GROUNn
RTA~838 VHF Communications System Block Diagram
Figure 9
23-20-04
AlliedSignnl Commem'nl Avionics Systems
MAINTENANCE MANUAL
RTA—B3B VHF COMMUNICATIONS SYSTEM
5. System Component Description
A.
RTA-BBB VHF Communications Transceiver
The RTA—BBB VHF Communications Transceiver is a lightweight VHF
transmitter—receiver that provides double—sideband a-m operation in
the 8.33—kHz spaced channels of the 118.000 MHz to 136.992 MHz band
for voice comunication. The unit also operates with
double—sideband a—m operation in the 25—kHz spaced channels of the
118.000 MHz to 136.975 MHz band for voice and ACARS data
communication. Frequency selection is entirely electronic; serial
digital frequency selection system per ARINC Characteristic 429 is
used to control the operation of the RTA—SSB.
The RTA—83B is completely solid—state and is housed in a 3 MCU case
per ARINC Characteristic 600. A handle is located on the front
panel of the RTA—83B to facilitate installation, removal, and
transport.
The RTA-B3B operates in all aircraft cooling environments; however,
optimum reliability is obtained when cooling with forced air in
accordance with ARINC Characteristic 600. The RTA—BSB meets 18-hour
loss of coolingAair test.
An [Tl/Cannon connector, type BKAFI-GSIOO—SO, 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—83B is partitioned into five subassemblies: transceiver
assembly, analog/digital module, CMC Module, power supply, and rear
interconnect module (refer to figure 10).
Other Components in the System
Other RTA—SBB system components are not supplied by AlliedSignal
Commercial Avionics Systems. Information on these units must be
obtained from their respective manufacturers.
6. Qperation
A.
General
The RTA-SSB VHF Comnunications Transceiver provides dependable
two—way air to ground VHF communications in the assigned 8.33-kHz
and 25—kHz spaced channels of the 118.00 to 136.992 MHz and 118.000
to 136.975 MHz band, respectively.
Operation of the RTA—BaB VHF Communications Transceiver is
controlled by a control unit which provides manual on/off control of
the system power, squelch threshold, and operating frequency
selection.
1.3. 1183-2 P 11
23-20—04 233/97
AMSignal Con-numb! Avionics Systems
MAINTENANCE MANUAL
RTA—83B VHF COMMUNICATIONS SYSTEM
VHF
COMMUNICATIONS
ANTENNA
T .
i-F AMPLIFIER] PRESELECTDR ANTENNA
nnzcmk fi—° mm ‘— swwcn
‘ T
nnmnmc
mm
“fl ——J
“mm“ 4— snuELcN. ,
l, ‘ errxAumchAn
<7 Rx smmzsm
‘ .
P— TX SVNTNESIZifil I TMNSMMER
B MDDDLAIOR
nusn-ro-HLK —> z r—
FREQUENCY g YUMNQCONYRDL P
sszch H g 1
E TRANSCEIVER
1 ASSEMBLY
ANALOG/DIGITAL
129 OUT 1
mm m n ' MODULE
3 some Test oR
AIRBUS TEST ADDRESS
HARDWARE sums
mvuv MSCRETES A YEST sums
mums WORD sums
CMC PROCESSOR
SVNTNESIZER mu
YES!“ BYTE
numn
0:1 5 vac
NJVDC
m IS 23 55:45»: _.
4. usvpc
? J RTA-aJB VHF
commumcm’lous
TRANSCEIVER
VSDMCGflBE
RIA—BSB VHF Communications Transceiver, Simplified Block Diagram
Figure 10
Page 12
1.5. 1183—2 23_2o_04 Aug/97
LB.
B.
(1)
(2)
(3)
(4)
1183-2
Alliedsigml Commercial Avionics Systems
MAINTENANCE MANUAL
RTA-83B VHF COMMUNICATIONS SYSTEM
Basic Theory
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 RTA—SBB 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.
Anal og/Digi tal 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 the
429 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.
CMC Processor Module
The CMC (Central Maintenance Computer) processor module
interfaces with the analog/digital module to monitor hardware
status, input discrete and test status, tuning word status, and
synthesizer data of the RTA-83B.
The CMC processor module output defines which functional test
(Boeing or Airbus) is to be initiated by 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—83B.
23-20-04 Page
AlledSlgml Commem'ui Avionlu 3mm:
MAINTENANCE MANUAL
RTA—83B VHF COMMUNICATIONS SYSTEM
(5) 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—SSB. 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
RTA—BSB.
1.8. 118372 F 14
23-20—04 733/97
Alledsignal commemlal Avionics Systems
MAINTENANCE MANUAL
RTA—83B VHF COMMUNICATIONS SYSTEM
FAULT ISOLATION
Genera]
FauTt isoTation is the process of isolating the source of a system faiiure
to an LRU (Tine replaceabie unit) or to the aircraft wiring.
Fault isoiation in the RTA—S3B VHF Communications System inciudes a
continuity check of the interwiring and the assurance that proper
instaflation techniques and procedures have been foi'lowed.
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
faciiities when availab'Ie. If necessary, repiace the RTA—BaB VHF
Communications Transceiver with a known good unit.
LB. 1183~2 P 101/102
23-20-04 age Aug/97
AliedSigml Commercial Avionics Systems
MAINTENANCE MANUAL
RTA—83B VHF COMMUNICATIONS SYSTEM
MAINTENANCE PRACTICES
1. General
This section of the manual provides service personnel with installation
and maintenance information for the RTA—BBB 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.
2. 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—B3B 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 Comercial 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
Comercial Avionics Systems (CAS), Quality Assurance Department, Olathe,
Kansas. 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.
LB. 1183-2 Pa e 201
23'20‘04 [Aug/97
Nliodsigml commercial Avionieu Systems
MAINTENANCE MANUAL
RTA—83B VHF COMMUNICATIONS SVSTEM
Preinstallation Testing
The components in the RTA—BJB 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.
Eguipment 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.
Interchangeability
The RTA—8SB VHF Communications System will operate in any installation
that complies with ARINC Characteristic 716—8. Refer to system
interwiring diagram figure 204 for particulars. Contact original
equipment manufacturer (DEM) for certification status.
Installation
A. General
The RTA—83B 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 HITH AIRCRAFT
PRIMARY POWER BEING SUPPLIED TO THE MOUNT CONNECTORS TO
ENSURE THAT POWER IS APPLIED ONLY TO THE PINS SPECIFIED IN
INTERHIRING DIAGRAM FIGURE 204.
B. Location of Equipment
Location of the RTA—83B 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—83B VHF Communications
Transceiver in accordance with ARINC Characteristic 600. The
LB. 1183—2 P 202
23—20-04 3339/97
Alliedsignal Comrnetfial Avionics Systems
MAINTENANCE MANUAL
RTA~833 VHF COMMUNlCATIONS SYSTEM
associated cooling equipment must be mounted in accordance with the
manufacturer's instructions.
The RTA-SaB can use the existing mounting tray or any other
equivalent mounting tray that is compatible for securing a unit
meeting the 3 MCU form factor per ARINC Characteristic 600.
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—83B 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 manufacturer.
C. Interwiring and Cable Fabrication
(1) General
Figure 204 is a complete interwiring diagram for a single
RTA—SSB 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.
LB. 1183—2 Pa e 203
23—20—04 gug/97
AlliedSigml Commercial Avioniu System:
MAINTENANCE MANUAL
RTAfBSB VHF COMMUNICATIONS SYSTEM
_4
1-1
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
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. Nhen
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.
The following determinants are the responsibility of the
installation agency for fabrication of the wiring harness, see
figures 201 and 204.
.| TYPE I SIGNAL NAME FUNCTION I
Input Mic Audio Input (HI) Microphone audio input. Part
of the standard four-wire
microphone interwiring as
described in Attachment 6 of
Input Mic Audio Input (L0)
RTA783B VHF Communications Transceiver Connector Determinants
Figure 201 (Sheet 1 of 5)
1.8. 1183—2 P 204
23-20-04 aifig/gy
Aliedslgnal Commel'chl Avionics Swami:
MAINTENANCE MANUAL
RTA-83B VHF COMMUNICATIONS SVSTEM
FUNCTION
m SIGNAL NAME
MPCl Input Mic PTT
Input Key Event
Input Max. Trans Time
Cutoff Function
Microphone push—to—talk
discrete input.
Gnd/Low = Transmitter keyed;
Open/High = Transmitter not
keyed.
Discrete input to Flight
Recorder. Follows the state
of Mic PTT input.
Gnd/Low = Transmitter keyed;
Open/High = Transmitter not
keyed.
Discrete input that enables
the maximum transmit cutoff
function
Gnd/Low =
0 en Hi h
Cutoff disabled;
= Cutoff enabled.
spare
Spare
DC Ground
Required for ARINC 716-8 VHF
COMM.
Discrete input that activates
LRU functional test function.
(ind/Low = activate functional
test.
Functional Test
RTA—83B VHF Communications Transceiver Connector Determinants
Figure 201 (Sheet 2)
I.B. 1183-2 P 205
23-20—04 agfig/W
AlliedSigml Con-nut“! Avionia Systems
MAINTENANCE MANUAL
RTA—83B VHF COMMUNICATIONS SYSTEM
FUNCTION
Anaiog 2400 bps ACARS data
input.
SIGNAL NAME
Data Link Data Input
HI
Data Link Data Input
(LQ)_
8.33 kHz Programing
nare
Discrete output that indicates
to the ControI Panel that the
unit is capabie of 833 kHz or
25 kHz afiation.
Spare
Spare
One of two Tow speed 429 input
ports to provide frequency
tuning data.
Freq/Funct Se'lect
Data I/P Port B A
Freq/Funct Select
Data I/P Part E (B) 1
Voice/Data SeTect Discrete input that enabIes
either the PTT key Tine (MPCI)
or the Data key Tine (MPD7).
Gnd/Low = Data key Tine
enabled;
OpenZHigh = PTT enabied.
Data Key Line Discrete input that keys the
transmitter in data mode.
(ind/Low = Transmitter keyed;
Open/High : Transmitter not
keyed.
RTA-83B VHF Communications Transceiver Connector Determinants
Figure 201 (Sheet 3)
1.8. 1183-2 P 205
23—20-04 agfig/W
MlledSiyn-l Commercial Avionies System:
MAINTENANCE MANUAL
RTA—83B VHF COMMUNICATIONS SYSTEM
SIGNAL AME FUNCTION
Data Key line Return Provides return for data key
line (MPD72.
SDI Bit 0 Prog A discrete input pair prewired
at the rear connector to
_ identify the specific VHF
SDI Blt 1 PTOQ radio location in the
aircraft.
SDI Prog Pin Common Ground for the SDI code
inuts.
Reserved for AGC Primary AGC Monitor used in
laboratory testinn.
S-are
Time Out Timer Ground for l—kHz intermittent
(T.0.T.) Tone tone for 5 seconds after
30 second continuous transmit.
MPDIO —
MPAll Input Freq/Funct Select One of two low speed 429 input
Data I P Port A A ports to provide frequency
‘ d v
MPBll Input Freq/Funct Select tuning ata
1 Data I P Port A B
-l_—
MPDll Input Freq Port Select Discrete input used to select
either Frequency/Function
Select Data I/P Port A or B.
‘. — Select Port A;
5‘ = Select Port B.
RTA-83B VHF Communications Transceiver Connector Determinants
Figure 201 (Sheet 4)
Page 207
1.8. 1183—2 23_20_04 Aug/97
AlliedSinn-I Commercial Avionics Systems
MAINTENANCE MANUAL
RTA—83B VHF COMMUNICATIONS SYSTEM
SIGNAL NAME FUNCTION
MPA13 Output SELCAL Audio and An analog output to provide
Data Link Output 2400 bps MSK data to the ACARS
MU. May aiso be used for
L ' ' .
Output SELCAL Audio and SELCA prOViSions
Data Link Output
MPC13 ' A discrete input to provide
squelch override or disabie
capabilityu
Audio/Sidetone An analog output for receiver
Output gHI! audio during receive mode and
, , sidetone audio during voice
Audio/Sidetone transmit modes.
An optionai two wire discrete
output to provide a switch
ciosure internal to the VHF
COMM for externai system
muting appiications during
transmit modes.
Muting Return
Antenna RF Coaxia] connection to RF
Input/Output antenna
DC Power Input Required for ARINC 716 VHF
+27.5VDC COMM radio
'_I_
Spare
DC Power Gnd Required for ARINC 716 VHF
COMM radio
Spare
RTA—BJB VHF Communications Transceiver Connector Determinants
Figure 201 (Sheet 5)
Page 208
LB. 1183—2 23_20_O4 Aug/97
Alliedsigml Comm-til Avionics Spiel":
MAINTENANCE MANUAL
RTA-83B VHF COMMUNICATIONS SYSTEM
(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—B3B VHF Communications System units are secured in the
airframe with mounting trays that can accommodate a unit that
conforms to 3 MCU form factor per ARINC Characteristic 600.
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.
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.
Page 209
1.3. 118372 23—20—04 Aug/97
AliedSign-I Comnm'cial Avionics System-
MAINTENANCE MANUAL
RTA—83B VHF COMMUNICATIONS SYSTEM
(2) RTA-83B 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-BSB VHF Communications Transceiver is installed in the
mount as follows:
(a) Slide the RTA—B3fl into the mount until the guide pins are
aligned and the electrical connectors are firmly engaged.
(b) Secure the front of the RTA—BSB 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) SafetyAwire the two screw clamps.
(3) VHF Communications Control Panel
The selected ARINC 716-8 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.
(4) VHF Communications Antenna
The selected ARlNC 716—8 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.
Page 210
LB. 1183—2 23_20_04 Aug/97
Allistigml Commercial Avionics Systems
MAINTENANCE MANUAL
RTA-83B VHF COMMUNICATIONS SYSTEM
7. Inspection and System Check Procedures
NOTE: Inspection and check procedures for the RTA—SSB VHF
Communications System includes checkout of all interfacing
units that may affect performance of the RTA—BaB.
A. Inspection
Figure 202 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.
EQUIPMENT | INSPECTION/CHECK PROCEDURE
3 MCU Unit As defined by manufacturer’s instructions.
Mount
RTA-B3B VHF
Transceiver
(1) Check that unit is fully inserted in mount and that
the knurled screw clamps which secure the unit in
the mount are ti ht 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.
As defined by manufacturer’s instructions.
ARINC 716—8
Control Panel
ARINC 716-8 As defined by manufacturer’s instructions.
VHF Antenna
Inspection/Check Procedures
Figure 202
8. System Checkout
(1) General
After installation of the RTA—BSB VHF Communications System,
and inspection of the equipment per previous figure 202,
perform a continuity and visual check of the system interwiring
per paragraph 7IB.(2). A postfinstallation test per paragraph
7.B,(3) should then be performed.
LB. 1183—2 P 211
23-20—04 alglfig/W
Allied5lgml Communial Avlonles smms
MAINTENANCE MANUAL
RTA—SSB VHF COMMUNICATIONS SYSTEM
(2) System Interwiring 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) Check that the RlA—BBB is properly installed and the
hold-down screw clamps are tight.
(b) Check wiring harness connectors for security and
connection to the RTA—83B.
(c) Check that antenna transmission line connectors are
securely fastened.
(d) Check that cables do not interfere with aircraft controls
or other equipment.
(3) Post—Installation Check
(a) Test Equipment Required
None Required.
(b) System Test
1 Establish the initial control settings listed below.
ARINC 716—8 CONTROL POSITION
Power on
Frequency Selector lune to any local VHF frequency
Volume Control midway
g Using the system’s headphone (or speaker) and
microphone, check operation of the RTA—BBB VHF
Transceiver.
3 Key the microphone and speak into it; speech should be
audible.
4_ Listen through the headphones (or speaker) and press
the SQUELCH DISABLE pushbutton. A squelch break should
be audible through the headphones.
LB. 1183—2 P 212
23—20—04 a359/97
8.
LB.
C‘
(1)
(2)
Alledsignal Commercial Avionic- Systems
MAINTENANCE MANUAL
RTA—83B VHF COMMUNICATIONS SYSTEM
As soon as possible, local flight check should be made
to verify system operation for both local and distant
stations.
Iu!
Flight Tests
Prefl ight Test
(a) General
The following test procedure gives instructions for a
preflight test which ensures that the RTA—83B VHF
Communications System is functioning in an acceptable
manner prior to takeoff.
(b) Test Procedures
Repeat the test procedure found in paragraph 7.B.(3)(b)‘
ln—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.B.(B)(b).
Removal and Replacement
A.
B.
(1)
(2)
(1)
(2)
(3)
1183—2
Removal
Loosen the two knurled screw clamps (located on the front of
mount) that secure the RTA—BSB to the mount.
Gently pull the transceiver forward until it is disconnected
from the rear connector and guide pins.
Repl acement
Slide the RTA—83B 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.
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.
Safety wire the two knurled screw clamps.
Page 213
23-20—04 Aug/97
9.
AlindSigml commercial Avionics Systems
MAINTENANCE MANUAL
RTA—B3B VHF COMMUNICATIONS SYSTEM
Maintenance Procedures
A.
Adjustments and Alignments
There are no adjustments or alignments required for the RTA—83B 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.
System Protect i on
The system should be protected by a IO—ampere circuit breaker
located at the circuit breaker panel in the aircraft.
Lubrication Practices
There are no requirements for periodic lubrication of any RTA—83B
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 I for a list of related component maintenance manual
publications.
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—BBB 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.
1.8. 1183-2 P 214
23-20—04 “gig/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 13:05:06
Producer                        : Acrobat Distiller 4.0 for Windows
Modify Date                     : 2001:05:12 13:05:08-04:00
Page Count                      : 40

EXIF Metadata provided by EXIF.tools