Thales Communications EVR750 AIRBORNE VHF DATA RADIO User Manual 333183

THALES Communications AIRBORNE VHF DATA RADIO 333183

CMM

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COMPONENT MAINTENANCE MANUAL
P/N EVR716-01-0100A, EVR750-03-0100A and EVR750-04-0100A
LISTE DES RENVOIS
ATA
23-12-30
Fabricant
P/N
Date d'édition originale
2003/03/01
Date d'édition 2003/03/01
23-12-30
TITLE Page 1/2
2003/03/01
COMPONENT MAINTENANCE MANUAL
P/N EVR716-01-0100A, EVR750-03-0100A and EVR750-04-0100A
TRANSMITTAL SHEET
TO: HOLDERS OF COMPONENT MAINTENANCE MANUAL FOR EVR716 AND EVR750 ATA 2312-30.
FILING INSTRUCTIONS
−
−
Revision No. P04 of the CMM replaces the revision No. 3.
Revision No. 3 is deleted.
23-12-30
TS Page 1 of 1
2003/03/01
COMMUNICATIONS
F0057
COMPONENT MAINTENANCE MANUAL
(FOR USE WITH SEPARATE
ILLUSTRATED PARTS CATALOG)
PRELIMINARY
Enhanced VHF Radio
VHF Communications Transceiver
P/Ns: EVR716-01-0100A
EVR716-01-0200A
EVR750-03-0100A
EVR750-04-0100A
EVR750-04-0200A
FIRST ISSUE: JAN 15/98
Ref/Doc: 36708021-AC
REVISION No.: 4
23-12-30
TP Page 1/2
2003/03/01
COMPONENT MAINTENANCE MANUAL
P/N EVR716-01-0100A, EVR750-03-0100A and EVR750-04-0100A
LIST OF EFFECTIVE PAGES
RECORD OF REVISIONS
REV. ISSUE
No. DATE
JAN 15/99
INSERTED
DATE
BY
REV
ISSUE
INSERTED
DATE
BY
REV
ISSUE
INSERTED
DATE
BY
MAY 21/99
2002/10/15
P04
2003/03/01
23-12-30
ROR Page 1/2
2003/03/01
COMPONENT MAINTENANCE MANUAL
MMR TLS755
P/N: TLS755-XX-YYZZK
REV. ISSUE
No. DATE
TITRE
Page 2/2
25 April 03
INSERTED
DATE
BY
Error! Reference source not found.
COMPONENT MAINTENANCE MANUAL
P/N EVR716-01-0100A, EVR750-03-0100A and EVR750-04-0100A
LIST OF EFFECTIVE PAGES
RECORD OF TEMPORARY REVISIONS
TEMP.
REV.
ISSUE DATE
No.
JUN 30/99
MAR 30/01
JUN 25/01
INSERTED
DATE
BY
DATE
REMOVED
BY
2002/10/15 THALES
2002/10/15 THALES
2002/10/15 THALES
23-12-30
PAGE No.
114, 117, 901
3A, 3B
4, 706
RTR Page 1/2
2003/03/01
COMPONENT MAINTENANCE MANUAL
P/N EVR716-01-0100A, EVR750-03-0100A and EVR750-04-0100A
LIST OF EFFECTIVE PAGES
SERVICE BULLETIN LIST
SERVICE
BULLETIN
NUMBER
EVR716-23-01
INCLUDED
IN
REVISION
DATE
OF
INCORPORATION
2002/10/15
EVR716-23-02
2002/10/15
2002/10/15
To upgrade the actual Receiver Board
(RX) to industrial level by a re-layout of
the printed circuit board.
(P/Ns: EVR716-01-0100A/01-0200A).
2002/10/15
To upgrade the actual HIRF Board to
industrial level by a re-layout of the
printed circuit board.
(P/Ns: EVR716-01-0100A/01-0200A).
2002/10/15
To correct some non-working units at
136.025 MHz Frequency due to the
disparity of the CR8 zener diode
regulating the 17V Power Supply of
MA21.
(P/Ns: EVR716-01-0100A/01-0200A).
Not issued.
2002/10/15
To provide the 8.33 KHz channelling
compatibility between VHF data radio
unit and the control panel on BOEING
B777.
(P/N: EVR716-01-0200A).
EVR716-23-03
EVR716-23-04
EVR716-23-05
EVR716-23-06
EVR716-23-07
TITLE
To increase the internal test filtering
during power switching.
To improve the general behaviour of
the sidetone, for CLIMAX and COSITE
configuration.
(P/Ns: EVR716-01-0100A/01-0200A).
To upgrade the actual Transmitter
Board (TX) to industrial level by a relayout of the printed circuit board.
(P/Ns: EVR716-01-0100A/01-0200A).
23-12-30
SBL Page 1/3
2003/03/01
COMPONENT MAINTENANCE MANUAL
P/N EVR716-01-0100A, EVR750-03-0100A and EVR750-04-0100A
SERVICE
BULLETIN
NUMBER
EVR716-23-08
EVR716-23-09
10
EVR716-23-10
11
EVR716-23-11
EVR7-23-01
EVR7-23-02
LIST OF EFFECTIVE PAGES
INCLUDED
DATE
TITLE
IN
OF
REVISION
INCORPORATION
2002/10/15
To improve the interference response
due to COSITE Transmitter (especially
for ACARS transmissions).
To enhance the transmitter spectrum
at ± 75 kHz detected by the ground
stations.
To improve the squelch response at
the range limit.
To change the monitoring of the power
interrupt information.
To correct the management of a “busy
channel” during autotest.
To provide data link improvement for
received audio time establishment and
for SQP.
To provide the 8.33 kHz channelling
compatibility between VHF data radio
unit and control panel on BOEING 777
whatever the unit P/N is.
P/Ns: EVR716-01-0100A/01-0200A
2002/10/15
To convert the EVR716 Radio into a
EVR750 “A” Radio.
Note: This service bulletin is not
included in this C.M.M.
Refer to SB No. 9 for technical
information.
This SB is only for EVR716 version:
01-0100A.
Not issued.
2002/10/15
2002/10/15
2002/10/15
To improve the reliability of the
EVR716 P/N: EVR716-01-0200A.
To improve the reliability of the
EVR716 P/N: EVR716-01-0100A
EVR750 P/N:EVR750-03-0100A
To adapt the receivers design to all
TCXO suppliers.To correct on some
units a random 400ms noise in the
headset when the PTT is released.
To check C180 polarity on the Tx
board.Applicable to P/N EVR716-010100A and EVR750-03-0100A.
23-12-30
SBL Page 2/3
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COMPONENT MAINTENANCE MANUAL
P/N EVR716-01-0100A, EVR750-03-0100A and EVR750-04-0100A
LIST OF EFFECTIVE PAGES
SERVICE
BULLETIN
NUMBER
EVR750-23-01
EVR750-23-02
EVR750-23-03
EVR750-23-04
INCLUDED
IN
REVISION
DATE
OF
INCORPORATION
2002/10/15
TITLE
2002/10/15
To upgrade the existing receiver board
(RX) by a re-layout of the printed circuit
board.
P/Ns: EVR750-03-0100A/03-0200A
2002/10/15
To upgrade the existing HIRF board by
a re-layout of the printed circuit board.
P/Ns: EVR750-03-0100A/03-0200A
To upgrade the existing transmitter
board (TX) by a re-layout of the printed
circuit board.
P/Ns: EVR750-03-0100A/03-0200A
Not issued.
23-12-30
SBL Page 3/3
2003/03/01
COMPONENT MAINTENANCE MANUAL
P/N EVR716-01-0100A, EVR750-03-0100A and EVR750-04-0100A
LIST OF EFFECTIVE PAGES
SERVICE INFORMATION LETTER LIST
SERVICE
INFORMATION
LETTER No.
INCLUDED
IN
REVISION
EVR750-23-01
EVR750-23-02
SUBJECT
PAGE
DATE
OF
TITLE
INCORPORATION
2002/10/15
Initial modifications status of power
Supply Unit (PSU), Transmitter Unit
(TX), Receiver Unit (RX), Data
Processing Unit (DPU) and HIRF Unit.
Applicable to P/Ns: EVR716-01-0100A
and EVR716-01-0200A.
2002/10/15
Initial modifications status of EVR750
Transceiver.
Applicable to P/Ns: EVR750-03-0100A
and EVR750-03-0200A.
2002/10/15
To adapt the receivers design to all
TCXO suppliers.
To correct on some units a random
400 ms noise in the headset when the
PTT is released.
To check C180 polarity on the
Transmitter Board.
P/Ns: EVR716-01-0X00A and
EVR750-03-0X00A.
DATE
SUBJECT
23-12-30
PAGE
DATE
SILL Page 1/2
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COMPONENT MAINTENANCE MANUAL
P/N EVR716-01-0100A, EVR750-03-0100A and EVR750-04-0100A
LIST OF EFFECTIVE PAGES
SUBJECT
Title Page
PAGE
DATE
2003/03/01
Blank
Record of
Revisions
2003/03/01
Blank
Record of
Temporary
Revisions
2003/03/01
Blank
List of
Effective
Temporary
Revisions
2003/03/01
Blank
Service
Bulletin List
2003/03/01
2003/03/01
2003/03/01
Blank
Service
Information
Letter List
2003/03/01
Blank
List of
Effective
Pages
2003/03/01
2003/03/01
2003/03/01
2003/03/01
2003/03/01
2003/03/01
2003/03/01
Blank
Table of
Contents
2003/03/01
2003/03/01
2003/03/01
2003/03/01
Introduction
2003/03/01
2003/03/01
2003/03/01
2003/03/01
SUBJECT
Description
and
Operation
23-12-30
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12
13
14
15
16
17
18
19
20
21
22
DATE
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COMPONENT MAINTENANCE MANUAL
P/N EVR716-01-0100A, EVR750-03-0100A and EVR750-04-0100A
LIST OF EFFECTIVE PAGES
TABLE OF CONTENTS
SUBJECT
PAGE
TRANSMITTAL SHEET................................................................................................................. 1
RECORD OF REVISIONS ............................................................................................................1
RECORD OF TEMPORARY REVISIONS..................................................................................... 1
SERVICE BULLETIN LIST ............................................................................................................ 1
SERVICE INFORMATION LETTER LIST ..................................................................................... 1
LIST OF EFFECTIVE PAGES....................................................................................................... 1
TABLE OF CONTENTS ................................................................................................................ 1
INTRODUCTION ........................................................................................................................... 1
1.
General............................................................................................................................... 1
2.
Equipment Identification ..................................................................................................... 2
A. Generic Part Number....................................................................................................... 2
B. Front panel labels ............................................................................................................ 2
3.
Uncommon Abbreviations/Acronyms.................................................................................. 2
DESCRIPTION AND OPERATION ............................................................................................... 1
1.
Description.......................................................................................................................... 1
A. General............................................................................................................................ 1
B. Frontispiece ..................................................................................................................... 3
2.
Function of Equipment........................................................................................................ 4
A. Characteristics................................................................................................................. 5
B. Description..................................................................................................................... 10
3.
Operation .......................................................................................................................... 18
A. General.......................................................................................................................... 18
B. Wired Chassis Assembly (CHC).................................................................................... 23
23-12-30
LOT Page 1
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COMPONENT MAINTENANCE MANUAL
P/N EVR716-01-0100A, EVR750-03-0100A and EVR750-04-0100A
LIST OF EFFECTIVE PAGES
INTRODUCTION
1.
General
This Component Maintenance Manual includes maintenance instructions prepared in
accordance with Air Transport Association Specification Nr. 100 for the THALES
COMMUNICATIONS Enhanced VHF Radio. Parts lists are provided in a separate Illustrated
Parts Catalog ATA: 23-12-30 (Ref/Doc: 36708031).
In this issue, the CMM provides informations concerning the EVR716/750 versions.
This manual provides procedures for shop testing and repair. It presents detailed circuit theory
with emphasis on items which will be especially helpful for effective fault isolation. It contains
complete performance tests and adjustment procedures.
This Component Maintenance Manual provides shop verified procedures that will enable a
technician, unfamiliar with the equipment, to restore it to serviceable condition. The procedures
are prepared for the technician that performs shop work and not for the aircraft technician.
CAUTION:
THE MATERIAL IN THIS MANUAL IS SUBJECT TO CHANGE. BEFORE
ATTEMPTING ANY MAINTENANCE OPERATION ON THE EQUIPMENT
COVERED IN THIS MANUAL, VERIFY THAT YOU HAVE COMPLETE AND
UP-TO-DATE PUBLICATIONS BY REFERRING TO THE APPLICABLE
PUBLICATIONS, SERVICE BULLETIN, SERVICE INFORMATION LETTER
INDEXES.
Refer to the Table of Contents for the page location of applicable sections.
A list of uncommon/acronyms abbreviations used in the manual is described in paragraph 2 of
the INTRODUCTION section. The manual will be revised as necessary to reflect current
information.
We welcome your comments concerning this manual. Although effort has been made to keep it
free of errors, some may occur. When reporting a specific problem, please describe it briefly
and include the manual part number, the paragraph or figure number, and the page number.
Send your comments to:
THALES AVIONICS
Aérodrome de Villacoublay
B.P59
78 141 VELIZY VILLACOUBLAY CEDEX
FRANCE
23-12-30
INTRO - Page 1
2003/03/01
COMPONENT MAINTENANCE MANUAL
P/N EVR716-01-0100A, EVR750-03-0100A and EVR750-04-0100A
LIST OF EFFECTIVE PAGES
2.
Equipment Identification
A.
Generic Part Number
The part number has the following format (example).
EVR716 -01- 0200A
Hardware evolution index
Family designation
Software evolution index
Maintenance
Software version
Version of the equipment according to installed
B.
Front panel labels
Different kinds of labels are stuck on the front panel of the EVR716/750 unit.
According of EVR716 or EVR750 unit versions, all labels are not similar.
For more information, refer to the Illustrated Parts Catalog, ATA: 23-12-30 (Ref/Doc:
36708031) Figures 1 and 1A for the localization on the front panel of the unit.
3.
Uncommon Abbreviations/Acronyms
ABBREVIATION/ACRONYM
ACARS
ADC
AF
AGC
AIN
AM
AMU
ANT
ARINC
ATE
BCD
BER
BIT
BITE
BNC
BNR
CCITT
CDU
IDENTIFICATION
Aircraft Communications Addressing and Reporting System
Analog to Digital Converter
Audio Frequency
Automatic Gain Control
Analog INput
Amplitude Modulation
Audio Management Unit
ANTenna
Aeronautical Radio INCorporated
Automatic Test Equipment
Binary Coded Decimal
Bit Error Rate
Built-In Test
Built-In Test Equipment
BiNary Code
BiNaRy
Comité Consultatif International de Télécommunication et
Transmission
Control Display Unit
23-12-30
INTRO - Page 2
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COMPONENT MAINTENANCE MANUAL
P/N EVR716-01-0100A, EVR750-03-0100A and EVR750-04-0100A
LIST OF EFFECTIVE PAGES
ABBREVIATION/ACRONYM
CFDS
CHC
CODEC
CMC
CMU
CPT
CPTT
CRT
CS
CSMA
CW
DAC
D/A
dBc
dBm
DC
DF
DFIU
DFS
DISP
DPU
DSP
D8PSK
EEPROM
EPLD
EPROM
ESDS
EVR
EXT
FET
FIFO
FILT
FM
FO
FT
FW
GND
HF
HIRF
ICAO
(cont’d)
IDENTIFICATION
Centralized Fault Display System
CHassis Câblé (Wired Chassis)
COder/DECoder
Centralized Maintenance Computer
Communications Management Unit
Counter
Control Push To Talk
Cathode Ray Tube
Chip Select
Carrier Sense Multiple Access
Carrier Wave or Continuous Wave
Digital to Analog Converter
Digital/Analog
DeciBel Carrier
DeciBel referred to 1 Milliwatt
Direct Current
Design Function
Discrete Function Interface Unit
Data Frequency System
DISPlay
Data Processing Unit
Digital Signal Processor
Differential 8 Phases Shift Keying
Electrically Erasable PROM
Erasable Programmable Logical Device
Electrically Programmable ROM
ElectroStatic Discharge Sensitive
Enhanced VHF Radio
EXTernal
Field Effect Transistor
First In, First Out
FILTer
Frequency Modulation
Oscillator Frequency
Functional Test
Failure Warning
GrouND
High Frequency
High Intensity Rejected Frequency
International Civil Aviation Organisation
23-12-30
INTRO - Page 3
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COMPONENT MAINTENANCE MANUAL
P/N EVR716-01-0100A, EVR750-03-0100A and EVR750-04-0100A
ABBREVIATION/ACRONYM
IF
IRQ
I/O
IT
Ko
LED
LF
LO
LRU
LSB
MAN
MCU
MSB
MSK
MU
NB
NC
NR
NU
NVM
OEM
OMS
PCB
PIN
P/N
PPM
PRG
PROM
PTT
PWR
RAM
RC
RCU
RD
RDY
RF
RMT
ROM
RST
R/T
(cont’d)
LIST OF EFFECTIVE PAGES
IDENTIFICATION
Intermediate Frequency
Interrupt ReQuest
Input/Ouput
InTerrupt
Kilo Octet (1024 octets)
Light Emitting Diode
Low Frequency
Local Oscillator
Line Replaceable Unit
Less Significant Bit
Manual
Module Control Unit
Most Significant Bit
Minimum Shift Keying
Management Unit
Narrow Band
Normally Closed
NumbeR
Not Used
Non Volatile Memory
Original Equipment Manufacturer
On-board Maintenance System
Printed Circuit Board
P (dopping) Intrinseque N (dopping)
Part Number
Pulse Position Modulation
Program
Programmable ROM
Push To Talk
Power
Random Access Memory
Resistor Capacitor
Remote Control Unit
ReaD
ReaDY
Radio Frequency
ReMoTe
Read Only Memory
Reset
Receiver/Transmitter
23-12-30
INTRO - Page 4
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COMPONENT MAINTENANCE MANUAL
P/N EVR716-01-0100A, EVR750-03-0100A and EVR750-04-0100A
LIST OF EFFECTIVE PAGES
ABBREVIATION/ACRONYM
Rx
SELCAL
SDI
SMD
SRU
SWR
TF
TP
T/R
TRIG
Tx
VCO
VHF
VMA
Vpp
Vrms
VSWR
WB
WRN
µP
IDENTIFICATION
Reception
SELective CALling
Source/Destination Identifier
Surface Mounted Device
Shop Replaceable Unit
Standing Wave Ratio
Technical Function
Top Part
Transmitter/Receiver
TRIGger
Transmission
Voltage Control Oscillator
Very High Frequency
Valid Memory Address
Volt Peak-to-Peak
Volt Root Mean Square Value
Voltage Standing Wave Ratio
Wide Band
WaRNing
Microprocessor
23-12-30
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COMPONENT MAINTENANCE MANUAL
P/N EVR716-01-0100A and EVR750-03-0100A
DESCRIPTION AND OPERATION
1.
Description
A.
General
This section gives the description of the EVR716/750 Enhanced VHF Radio (VHF
communications transceiver).
THALES Part-Number
Features
EVR716-01-0100A
118 MHz -136.975 MHz frequency range. 25 kHz and
8.33 kHz channel spacing. Compliant with ICAO Annex
10 FM immunity. Conform to DO-178B and DO-160C
requirements. Fault memory. ACARS compatible
(analogue interface). 200 ms power drop-out
transparency. Software data loading via RS232 interface.
Airbus ABD0048 or Boeing D243W220 interface
maintenance interface selectable by pin programming
with Airbus ABD0048 maintenance interface by
default.
EVR716-01-0200A
118 MHz-136.975 MHz frequency range. 25 kHz and
8.33 kHz channel spacing. Compliant with ICAO Annex
10 FM immunity. Conforms to DO-178B and DO-160C
requirements. Fault memory. ACARS compatible
(analogue interface). 200 ms power drop-out
transparency. Software dataloading via RS232 interface.
Airbus ABD0048 or Boeing D243W220 interface
maintenance interface selectable by pin programming
with Boeing D243W220 maintenance interface by
default.
(cont’d)
Table 1 - Part Numbers List
23-12-30
Page 1
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COMPONENT MAINTENANCE MANUAL
P/N EVR716-01-0100A, EVR750-03-0100A and EVR750-04-0100A
LIST OF EFFECTIVE PAGES
THALES Part-Number
Features
EVR750-03-0100A
118 MHz-136.975 MHz frequency range. 25 kHz and
8.33 kHz channel spacing. Compliant with ICAO Annex
10 FM immunity. Conforms to DO-178B and DO-160C
requirements. Fault memory. Analogue or Digital
Interface ACARS compatible (digital interface with
ATSU/CMU-mode A-). 200 ms power drop-out
transparency. Software dataloading via RS232
interface. Airbus ABD0048 or Boeing D243W201
interface maintenance. Interface selectable by pin
programming with Airbus ABD0048 maintenance
interface by default.
EVR750-04-0100A
118 MHz-136.975 MHz frequency range. 25 kHz and
8.33 kHz channel spacing. Compliant with ICAO Annex
10 FM immunity. Conforms to DO-178B and DO-160D
requirements. Fault memory. Analogue or Digital
Interface ACARS compatible (digital interface with
ATSU/CMU-mode A-). 200 ms power drop-out
transparency. Data transmission (31.5kb/sec) with the
VDL mode 2 protocol (D8PSK modulation and CSMA
access according to ARINC 750 and SARPS VDL2).
Interface with ATSU/CMU mode 2. Software
dataloading via RS232 interface. Airbus ABD0048 or
Boeing D243W201 interface maintenance. Interface
selectable by pin programming with Airbus ABD0048
maintenance interface by default.
EVR750-04-0200A
118 MHz-136.975 MHz frequency range. 25 kHz and
8.33 kHz channel spacing. Compliant with ICAO Annex
10 FM immunity. Conforms to DO-178B and DO-160D
requirements. Fault memory. Analogue or Digital
Interface ACARS compatible (digital interface with
ATSU/CMU-mode A-). 200 ms power drop-out
transparency. Data transmission (31.5kb/sec) with the
VDL mode 2 protocol (D8PSK modulation and CSMA
access according to ARINC 750 and SARPS VDL2).
Interface with ATSU/CMU mode 2. Software
dataloading via RS232 interface. Airbus ABD0048 or
Boeing D243W201 interface maintenance. Interface
selectable by pin programming with Boeing D243W201
maintenance interface by default.
Table 1 - Part Numbers List
23-12-30
INTRO - Page 2
2003/03/01
COMPONENT MAINTENANCE MANUAL
P/N EVR716-01-0100A and EVR750-03-0100A
B.
Frontispiece
Figure 1 - EVR716/750 Unit
23-12-30
Page 3
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COMPONENT MAINTENANCE MANUAL
P/N EVR716-01-0100A, EVR750-03-0100A and EVR750-04-0100A
LIST OF EFFECTIVE PAGES
2.
Function of Equipment
The airborne equipment, called EVR (Enhanced VHF Radio), is a VHF communications
transceiver operating in the aeronautical band (118 MHz to 137 MHz or 118 MHz to 152 MHz),
used by Air Transport Aircraft as a primary equipment for communications with the ground air
traffic control infrastructure (in continental areas) or for communications between aircraft (relay,
emergency).
The basic version of EVR-716 (EVR716-01-xxxxx) and EVR750 (EVR750-03-xxxxx and
EVR750-04-xxxxx) operates in the 118 MHz-137 MHz aeronautical band and a specific version
for frequency band extension up to 152 MHz is also available (EVR716-02-xxxxx).
Aboard the aircraft, the EVR716/750 transceiver can operate with the following equipment:
−
a Frequency Selection System which can be an RCU (Radio Control Unit or control unit)
or an RMP (Radio Management Panel) to agree with the aircraft configuration,
−
an ACARS MU (Management Unit, ARINC 724) or a CMU (Communications
Management Unit, ARINC 758),
−
an Audio Management Unit (AMU),
−
a maintenance computer: OMS (ARINC 624) or CFDS (ARINC 604),
−
a SELCAL decoder system,
−
a ATSU/CMU mode 2,
−
a VHF antenna.
The EVR716 transceiver operates according the following modes of operation:
−
Mode 0A: transmits/receives voice signals in one-way mode with 25 kHz channels
spacing, Amplitude Modulation and Double Side Bands,
−
Mode 0B: transmits/receives voice signals in one-way mode with the channels 8.33 kHz
channels spacing, Amplitude Modulation and Double Side Bands,
−
Mode 1A: transmits/receives data signals in one-way mode with AM-MSK modulation,
MSK modulation being performed externally in the (C) MU (standard ACARS mode). The
signal rate is 2.4 kb/sec. with the 25 kHz apart channels spacing.
The EVR750 transceiver operates according to the same modes as EVR716 (0A/0B/1A) and in
addition according to the following mode:
−
Mode 1C: transmits/receives data signals in one-way mode with AM-MSK modulation,
MSK modulation being performed internally. The signal rate is 2.4 kb/sec. with the 25 kHz
apart channels spacing.
−
Mode 2: transmits/receives data signals in one-way mode with D8PSK modulation. The
signal rate is 31.5 kb/sec with the 25 kHz apart channel spacing.
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COMPONENT MAINTENANCE MANUAL
P/N EVR716-01-0100A and EVR750-03-0100A
A.
Characteristics
(1)
Electrical characteristics
CHARACTERISTICS
GENERAL
Operational modes
Power requirements
Form factor
Weight
Operating Temperature
Storage Temperature
Over pressure decompression
Vibrations
Electromagnetic compatibility
Frequency control
Frequency range
Channel spacing
Frequency stability
Duty cycle
Channel Switching
Transmit to receive switching
time
Receive to transmit switching
time
(cont’d)
SPECIFICATIONS
Voice/25 kHz (0A)
Voice/8.33 kHz (0B)
Data AM/MSK (1A) (with external modem)
Data AM/MSK (1C) (with internal modem)
Data D8PSK (2)
28 VDC/180 W
Mode 2 :28VDC/210W
3 MCU, ARINC Specification 600 i.e.
200x94x387.5 (mm)
4450 g ± 50 g
-25 °C to +70 °C (+13°F to +158°F)
-55 °C to +85 °C (-67°F to +185°F)
In accordance with DO-160C, section 4.6, category A2
and D1 (Cf: SSS and DDP) (DO-160D for EVR750-04xxxxx)
In accordance with DO-160C, section 8, category B
(DO-160D for EVR750-04-0x00A)
In accordance with DO-160C, section 15, 16, 17, 18, 19,
20, 21 and 22. (DO-160D for EVR750-04-xxxxx)
Serial digital in accordance with ARINC 429
117.975 MHz to 137.000 MHz
25 kHz and 8.33 kHz
< ± 5 ppm
Continuous transmission (with ARINC 600 cooling
system).
Duty cycle of 20% (1mn/4mn) with natural convection
Less than 60 ms
Less than 50 ms in mode 0A, 0B, 1A, 1C
Less than 1.5 ms in mode 2
Less than 50 ms in mode 0A, 0B, 1A, 1C
Less than 1.5 ms in mode 2
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P/N EVR716-01-0100A, EVR750-03-0100A and EVR750-04-0100A
LIST OF EFFECTIVE PAGES
CHARACTERISTICS
SPECIFICATIONS
RECEIVER
ED-23B/DO-186A
ED-92
Sensitivity (modes 0A & 0B)
Class C and E
Class F
For a wanted signal of -106 dBm, modulated 1kHz/30%,
(S+N)/N* is greater than 6 dB (nominal).
(*): CCITT weighted
Sensitivity (mode 2)
Better than –98dBm to get a BER (non corrected)
better than 1.10-3
Selectivity (mode 0A)
> ± 9 kHz at 6 dB bandwidth
< ± 17 kHz at 60 dB bandwidth
< ± 25 kHz at 70 dB bandwidth
Selectivity (mode 0B)
> ± 2.78 kHz at 6 dB bandwidth
< ± 7.37 kHz at 60 dB bandwidth
Adjacent channel rejection (mode 2) Better than 44dB to get a BER better than 1.10-3
Co-channel interference (mode 2)
Co-channel interference ratio better than 20dB to get a
BER better than 1.10-3
Dynamic Range (mode 2)
From -98dBm up to -7dBm to get a BER better than 1.10-3
Strong Signals within the VHF range Better than -27dBm to get a BER better than 1.10-3
(mode 2)
Cross modulation
Unwanted signal level (1 kHz/50%) to obtain – 10 dB
referred to a signal of –87 dBm (1 kHz/50%):
- at
±
25 kHz > – 20 dBm
- at
±
50 kHz > – 15 dBm
- at
±
100 kHz > – 10 dBm
AGC regulation
Within 3 dB (-93 dBm to -13 dBm input); no more than
6 dB (-101 dBm to +1 dBm)
Audio output
10 mW (adjustable from 5 mW to 40 mW) into 600 ohms
(± 20%) resistive load for -53 dBm signal modulated 30%
at 1000 Hz
Audio output frequency response
Within 6 dB from 300 Hz to 2500 Hz better than -20 dB at
3750 Hz
Audio output harmonic distortion
Not to exceed < 3% for -53 dBm signal modulated 30% at
1000 Hz
Undesired responses
< 80 dB
Intermodulation (FM immunity)
as per ARINC 716 section 3.6.7.5
Output level
0.5 Vrms (min.) into 600 ohms (± 20%) resistive load
Selcal/Data
Frequency
Selcal (mode Voice):
Output
response
< 3 dB from 312 Hz to 1200 Hz
AM-MSK (mode data)
< ± 6 dB from 300 Hz to 6600 Hz
Distortion
< 3% for a signal of -53 dBm, modulated 30% at 1000 Hz
(cont’d)
23-12-30
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COMPONENT MAINTENANCE MANUAL
P/N EVR716-01-0100A and EVR750-03-0100A
CHARACTERISTICS
SPECIFICATIONS
TRANSMITTER
ED-23B/DO-186A
ED-92
Output power
Output power (mode 2)
Harmonics
AF response
Audio distortion
Modulation level
Spectrum mask (8.33 kHz)
Modulation
ratio
Frequency
response
Distortion
Data Input
RF Power rise time
RF Power release time
Symbol constellation error
Adjacent channel power
Wide band noise
Certification
NOTE:
Class 3 and 5
Class 7
> 25 W
> 15 W
H2 < -16 dBm
Hn < -26 dBm (n≥ 3)
Within 6 dB from 300 Hz to 2500 Hz
< 10%
> 80 % for 0.25 Vrms at 1000 Hz
For an audio frequency from 300 Hz to 10 kHz and an audio
level attenuated by 10 dB/octave from 800 Hz to 10 kHz,
referred to 70% modulation level
< -45 dBc from ± 3.2 kHz to ± 5 kHz
< -60 dBc from ± 5 kHz to ± 7 kHz
< -70 dBc for frequency shift greater than ± 7 kHz
> 80% for a frequency of 1000 Hz at -10 dBm
Within 6 dB from 600 Hz to 6600 Hz
< 10% for 80% modulation ratio over frequency range from
600 Hz to 6600 Hz
< 190µs
< 190µs
Error vector Magnitude (EVM) < 6%
1st ACP : < -18dBm
2nd ACP : < -28dBm
3rd ACP : < -38dBm
< -53dBm
Pour EVR716-01-xxxxx et EVR750-03-xxxxx :
DO160C/A2D1/YBA/BCMN/XXXXXXABAZZUZ/A2E2/XX
Pour EVR750-04-xxxxx :
DO160D
Env.Cat.[(A2)(D1)Y]BAB[SMBC]XXXXXXAAAZZUZ[A2E2]X
XA
QAC1
”Nominal” relates to Standard Conditions.
The first and last selectable 25 kHz channels are respectively:
−
118.000 (F0 = 118.0000 MHz)
−
136.975 (F0 = 136.9750 MHz)
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COMPONENT MAINTENANCE MANUAL
P/N EVR716-01-0100A, EVR750-03-0100A and EVR750-04-0100A
LIST OF EFFECTIVE PAGES
The first and last selectable 8.33 kHz channels are respectively:
−
118.005 (F0 = 118.0000 MHz)
−
136.990 (F0 = 136.9917 MHz)
23-12-30
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COMPONENT MAINTENANCE MANUAL
P/N EVR716-01-0100A and EVR750-03-0100A
(2)
Environmental Certification
The EVR716/750 Transceiver meets the environmental conditions of the Radio
Technical Commission for Aeronautics (RTCA) document number DO-160C,
”Environmental Conditions and Test Procedures for Airline Electronic/electrical
Equipment and Instruments”.(DO-160D for EVR750-04-xxxxx).
MAGNETIC EFFECT
POWER UNIT
VIBRATION
VOLTAGE SPIKES
HUMIDITY
AUDIO FREQUENCY
TEMPERATURE
CONDUCTED
VARIATION
SUSCEPTIBILITY
LOSS OF COOLING
INDUCED SIGNAL
SYSTEM
SUSCEPTIBILITY
TEMPERATURE
RADIO FREQUENCY
AND ALTITUDE
SUSCEPTIBILITY
EMISSION OF RADIO
FREQUENCY ENERGY
A2 D1 /BAB /SMBC
/X
XXXXX
AAAZZUZ
/A2E2
/X X
/A
ELECTROSTATIC
DISCHARGE
ICING
EXPLOSION
LIGHTNING INDIRECT
EFFECT
WATERPROOFNESS
NOT
APPLICABLE
LIGHTNING DIRECT
HYDRAULIC FLUID
EFFECT
SAND AND DUST
FUNGUS RESISTANCE
SALT SPRAY
Figure 2 - Environmental Certification Categories
23-12-30
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COMPONENT MAINTENANCE MANUAL
P/N EVR716-01-0100A, EVR750-03-0100A and EVR750-04-0100A
LIST OF EFFECTIVE PAGES
B.
Description
See Figure 3.
The EVR716/750 appears as a 3 MCU form box.
The EVR716/750 transceiver has the operating subassemblies (SRU) below:
−
a receiver module
−
a transmitter module
−
a power supply module
−
a Data Processing unit (DPU module)
−
an HIRF module
−
a power storage module (behind the rear panel)
−
a wired chassis
The EVR716/750 transceiver is built with a center chassis which holds (See Figure 4):
−
a front panel assembly which hold the LED type indicators, a pushbutton for the
triggered test and the headset and microphone connectors. The six indicators are:
⋅
”FAIL LRU” (red)
⋅
”FAIL IN” (red)
⋅
”PASS” (green)
⋅
”VSWR” (red)
⋅
”Tx” (green)
−
⋅
”Rx” (green)
on left side, the receiver module,
−
on right side, the DPU module,
−
on the center part, the Power Supply module and the Transmitter module.
−
a rear panel with power supply, antenna input, inputs/outputs (discretes, ARINC
buses) and ATE (Automatic Test Equipment) interface.
The rear connector has the three parts below:
−
the 60-way Middle Part (MP) with all the transceiver inputs (discretes, ARINC
buses),
−
the 60-way Top Part (TP) with the contacts used for the ATE,
−
the Bottom Part (BP) with the power supply contacts and the antenna coaxial
connector.
23-12-30
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COMPONENT MAINTENANCE MANUAL
P/N EVR716-01-0100A and EVR750-03-0100A
(1)
Electrical interfaces
NOTE:
Hi = High
Lo = Low
LS = Low Speed
HS = High Speed
(a)
Middle Part connector
CONNECTOR/PIN
MPA1
MPB1
MPC1
MPD1
MPA2
MPB2
MPC2
MPD2
MPA3
MPB3
MPC3
MPD3
MPA4
MPB4
MPC4
MPD4
MPA5
MPB5
MPC5
MPD5
MPA6
MPB6
MPC6
MPD6
MPA7
MPB7
MPC7
MPD7
(cont’d)
MPA8
MPB8
MPC8
MPD8
MPA9
SIGNAL NAME
Mike Input
“
“
Key Event
Max Trans cutoff
Mike Input (Ground)
Data Loader Input
“
Optional
(Remote Squelch)
Hi
Lo
PTT
HS
Hi
ARM
Lo (GND)
DC Ground
Self Test Discrete
Audio Ground (Ground)
Data Loader Output
HS
“
Data Link Input
HI
”
Lo
Reserved for ARNIC 716 compatibility
8.33 kHz program for ARINC 716 compatibility
Data from OMS/CFDS # 1 input Port A
”
”
”
Data from OMS/CFDS# 2 input Port B
”
”
”
Freq./Func: Select
Data I/P Port B
Voice/Data Select
Data key line
LS
LS
LS
Reserved
Data loader enable
Reserved
Return (DC Ground)
SDI code input
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COMPONENT MAINTENANCE MANUAL
P/N EVR716-01-0100A, EVR750-03-0100A and EVR750-04-0100A
LIST OF EFFECTIVE PAGES
CONNECTOR/PIN
SIGNAL NAME
MPB9
SDI code input
MPC9
Ground
MPD9
Reserved for AGC
MPA10
Program common
MPB10
Reserved
MPC10
Data to both CMUs Output port
HS
MPD10
”
”
”
MPA11
Freq./Funct. Select Data I/P Port A
LS
MPB11
”
”
”
MPC11
Maintenance interface software pin programming
MPD11
Data select discrete
MPA12
Data from CMU#1 Input Port A
HS
MPB12
”
”
”
MPC12
Data from CMU#2 Input Port B
LS
MPD12
”
”
”
MPA13
Selcal audio and Data output
HI
MPB13
”
”
”
Lo
MPC13
Squelch disable
MPD13
Squelch disable return (Ground)
MPA14
Maintenance interface software pin programming
MPB14
Ground/air discrete
MPC14
Data to OMS or CFDS Output port
LS
MPD14
”
”
”
MPA15
Audio/sidetone output
HI
MPB15
”
Lo
MPC15
Muting output
MPD15
Muting return (Ground)
23-12-30
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COMPONENT MAINTENANCE MANUAL
P/N EVR716-01-0100A and EVR750-03-0100A
(b)
Top Part connector
CONNECTOR/PIN
TPA1
TPB1
TPC1
TPD1
TPA2
TPB2
TPC2
TPD2
TPA3
TPB3
TPC3
TPD3
TPA4
TPB4
TPC4
TPD4
TPA5
TPB5
TPC5
TPD5
TPA6
TPB6
TPC6
TPD6
TPA7
TPB7
TPC7
TPD7
TPA8
TPB8
TPC8
TPD8
TPA9
TPB9
TPC9
TPD9
TPA10
TPB10
TPC10
TPD10
TPA11 TO TPD15
SIGNAL NAME
MANUFACTURER IDENTIFIER
MANUFACTURER
RESERVED
RESERVED
COMMON
NOT USED
NOT USED
NOT USED
NOT USED
NOT USED
NOT USED
NOT USED
NOT USED
NOT USED
SELECT MODE ATE
TX 232A
DC GROUND
RX 232A
LED A1
LED A2
LED A3
LED A4
LED A5
RESERVED FOR AGC
RESERVED
WRITTEN
P5VT
P15VT
M15VT
NOT USED
RESPUATE1
RESPUATE2
NOT USED
NOT USED
BLOSQLT
CANOCT
COMPRESSOR-ON/OFF-INPUT
RESERVED
NOT USED
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COMPONENT MAINTENANCE MANUAL
P/N EVR716-01-0100A, EVR750-03-0100A and EVR750-04-0100A
(c)
LIST OF EFFECTIVE PAGES
Bottom Part connector
CONNECTOR/PIN
BP1
BP2
BP3
BP4
BP5
(d)
SIGNAL NAME
ANTENNA RF
POWER INPUT + 28 VDC
SPARE
POWER INPUT GROUND
NOT USED
Pin programming for maintenance software selection
−
−
P/N EVR 716/750 with BOEING maintenance interface by default:
EVR7xx-0x-0200A.
P/N EVR716750 with AIRBUS maintenance interface by default:
EVR7xx-0x-0100A.
Pin Programming for maintenance software
selection
Maintenance Software
selected
MC11
MA14
Airbus
1*
Boeing
1*
Airbus
1*
1*
Default
* or not wired.
23-12-30
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COMPONENT MAINTENANCE MANUAL
P/N EVR716-01-0100A and EVR750-03-0100A
Figure 3 - SRU Location
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COMPONENT MAINTENANCE MANUAL
P/N EVR716-01-0100A, EVR750-03-0100A and EVR750-04-0100A
LIST OF EFFECTIVE PAGES
Figure 4 - Rear and Front Panels
23-12-30
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COMPONENT MAINTENANCE MANUAL
P/N EVR716-01-0100A and EVR750-03-0100A
267
45.2
63.9 MAX
56.7
0.5 W
INTLET AREA
114.3 MINI
3 MAX
2 MAX
0.5
194
CENTER
OF GRAVITY
3.6
53.5
0.4 B
318+ 1
319
323.7 MAX
51 MAX
3 MAX
OUTLET
AREA
50 MAX
Figure 5 – Dimensions
23-12-30
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COMPONENT MAINTENANCE MANUAL
P/N EVR716-01-0100A, EVR750-03-0100A and EVR750-04-0100A
LIST OF EFFECTIVE PAGES
3.
Operation
A.
General
The primary function of the EVR716/750 transceiver is to provide voice and data
communications for Air Transport Aircraft, in the aeronautical band (118 MHz to
137 MHz).
The EVR716/750 transceiver operates in the voice and data modes given in the ARINC
716/750 specifications, that is for the voice modes: Amplitude Modulation with Double
Side Bands, with the channels 25 kHz (0A mode) or 8.33 kHz (0B mode) apart; and in
data mode: ACARS mode with an external modem. (internal modem for EVR-750) and
VDL Mode 2 (D8PSK).
MODE
CHARACTERISTICS
0A
Analog voice transmission
25 kHz
0B
Analog voice transmission
8.33 kHz
1A
Data, 25 kHz channel
AM-MSK modulation (2.4 kb/sec.)
External modem, CSMA access
ACARS protocol (analog interface for digital interface
with ATSU/CMU for EVR-750).
1C
Data, 25 kHz channel
AM-MSK modulation (2.4 kb/sec.)
Internal modem, ACARS protocol (analog interface with
ATSU/CMU).
Data, 25 kHz channel
D8PSK modulation (bit rate 31.5kb/sec, symbol rate
10.5 kbauds) Access to the channel :CSMA non
adaptive p-persistent Interface with ATSU/CMU
through link ARINC 429 high speed.
Table 2 - Modes of Operation
23-12-30
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COMPONENT MAINTENANCE MANUAL
P/N EVR716-01-0100A and EVR750-03-0100A
The EVR716/750 transceiver has seven subassemblies (SRU) which can be replaced in
a maintenance shop. These are:
Name
WIRED CHASSIS
HIRF module
RECEIVER Module
TRANSMITTER Module
DPU Module
POWER SUPPLIES Module
POWER STORAGE module
Short name
CHC
HIRF
REC
EME
DPU
ALM
PST
Table 3 - SRU of EVR716/750
The primary functions of an SRU are known as the Design Functions (DF).
Each function of a design function is known as a Technical Function (TF). An TF is a set
of components related to a primary component.
The functions are identified by the short name (mnemonic) of SRU and the short names
of the design function and technical function.
Example: SRU_DF_TF
HIRF_HIRF_RECIN
SRU
DESIGN FUNCTION (DF)
DESIGN FUNCTION (DF)
TECHNICAL FUNCTION (TF)
TECHNICAL FUNCTION (TF)
TECHNICAL FUNCTION (TF)
TECHNICAL FUNCTION (TF)
TECHNICAL FUNCTION (TF)
TECHNICAL FUNCTION (TF)
DESIGN FUNCTION (DF)
DESIGN FUNCTION (DF)
TECHNICAL FUNCTION (TF)
TECHNICAL FUNCTION (TF)
TECHNICAL FUNCTION (TF)
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COMPONENT MAINTENANCE MANUAL
P/N EVR716-01-0100A, EVR750-03-0100A and EVR750-04-0100A
LIST OF EFFECTIVE PAGES
Figure 6 - Organization of Functions
23-12-30
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COMPONENT MAINTENANCE MANUAL
P/N EVR716-01-0100A and EVR750-03-0100A
The next block diagrams show the connections between all the subassemblies of the
EVR716/750:
PP5V
FRONT PANEL
PP28V
PP21V
Transmitter
Module
PP5V
PP15V
PM15V
Receiver
Module
EME
PPOWINT
DPU
Module
PP5V
PP15V
PM15V
PP21V
PP16V
PRESET
PRESET
PPOW_1
PPOWINT
PPOW_1
PPOW_2
PPOW_2
R_SYN_P (10 MHz)
REC
GST
Power Storage
Module
PST
PP50V
Power Supplies
Module
PP28VPA
HIRF
Module
PP28VPS
HIRF
PM15VT
PP15VT
PP5VT
+28V Network
ALM
A1Z-SA-E
REAR CONNECTOR
Figure 7 - Power Supply Connections
23-12-30
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FCOMP
REAR CONNECTOR + HIRF
23-12-30
RANTEN
RCANOC
FDTIN
RDTOUT
RVOOUT
RLO2LEV
DPU
RAGCIF
RAGCFST
RAGCWB
FRSQL
FMIKIN
R-LF3
R-LF4
RSYNDPU
CMIK
MALT_TX
MALT_RX
MPROTEC
MTST_TX
MTST_RX
MNB_WB
MAN_D8
MVO_DAT
MCLKSER
MDATSER
MSTRO
RSQL-OB
CPUSHB (Push-button)
MLEDs
RHEA
CMIK (R/T LF)
REXT-LO-HI
11
Logic tests
RCANOC
RBLOSQL
(Audio Side tone)
Receiver
Module
TSIDETONE
TLFREC (LF)
Logic tests
MTST_TX
MTST_RX
MVO_DAT
MAM_D8
MNB_WB
MSTRO_T
MDATSER
MCLKSER
MPROTEC
MALT_TX
RBLOSQL
FAIRGRO
FDATSEL
FMNTID1
FMNTID2
FSLTDT
FSLFTST
FSDI
FOT-ID
FWRITEN
FMODEA
FRX232A
MTX232A
FDATLOD
MKEVENT
MMUTING
MDL
MCMC
MCMU
FPTTKEY
FDATKEY
FDFS1
FDFS2
FCMU1
FCMU2
FCMC1
FCMC2
FDLR
FVODAT
FTXCUTO
LED_ATE
CPTT
COMPONENT MAINTENANCE MANUAL
P/N EVR716-01-0100A, EVR750-03-0100A and EVR750-04-0100A
LIST OF EFFECTIVE PAGES
FRONT PANEL
R_SYN_T
TVHFT_R
Transmitter
Module
EME
REC
RHEA
D_LF1
D_LF2
DPU
Module
Receiver Module
A2Z-SA-E
Figure 8 - Signal Connections
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COMPONENT MAINTENANCE MANUAL
P/N EVR716-01-0100A and EVR750-03-0100A
B.
Wired Chassis Assembly (CHC)
The wired chassis assembly does the functions below (without the mechanical functions):
−
electrical interface between the internal functions of the equipment,
−
dissipation of the heat caused by the operation of the electrical subassemblies,
−
control of a serviceability test using six LEDs.
Ribbon cables connect the cards and the rear connector.
The wired chassis assembly has one Design Function (DF):
Name
Short name
CHC_FAV
Front Panel
Table 4 - Wired Chassis
Design Function
+5V
Triggered Test (PB)
HI_HEADPHONE_FACE_AV
LO_HEADPHONE_FACE_AV
LEDs Control
HI_MICRO_FACE_AV
Front Panel
LO_MICRO_FACE_AV
Alternat phonie
CHC_FAV
CHC
B1Z-SA-E
Figure 9 - Wired Chassis (CHC)
Block Diagram
This DF has one TF:
Name
Front Panel
Short name
CHC_FAV_FAV
Table 5 - Front Panel
Technical Function
This TF is the front panel of the EVR716/750 transceiver. It has six LED type indicators,
one ”TEST” pushbutton to trigger the tests. There are also two jack type sockets, one for
the headset and the other for the microphone (See Figure 4).
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P/N EVR716-01-0100A, EVR750-03-0100A and EVR750-04-0100A
LIST OF EFFECTIVE PAGES
The six indicators are:
−
”FAIL LRU” (red):
lights on when the continuous or/and triggered tests (init or
pushbutton) find a malfunction in the transceiver and not in the
inputs (discrete or ARINC 429 bus).
−
”FAIL IN” (red):
lights on when the EVR716/750 transceiver finds a malfunction
in the inputs (DFS ARINC 429 bus).
−
”PASS” (green):
lights on when the continuous or/and triggered tests (init or
pushbutton) do not find any malfunctions.
−
”VSWR” (red):
lights on when the transceiver measures an VSWR larger
than 2:1.
−
”Tx” (green):
lights on when the transceiver transmits.
−
”Rx” (green):
lights on when the transceiver is in receive mode.
The front panel connections are as follows:
Signal
LED Tx control
Input/Output
SRU_DF_TF
DPU_G/M_AFFAV
LED Tx control
DPU_G/M_AFFAV
LED VSWR control
DPU_G/M_AFFAV
LED PASS control
DPU_G/M_AFFAV
LED FAIL LRU control
DPU_G/M_AFFAV
LED FAIL IN control
DPU_G/M_AFFAV
Front Panel Test (PB)
DPU_G/M_DECTEST
+5V voltage
REC_ALM_+ 5V
HI_CASQUE_FACE_AV (RHEA_H)
REC_AIGUI_BFAUDIO
LO_CASQUE_FACE_AV (RHEA_L)
REC_AIGUI_BFAUDIO
HI_MICRO_FACE_AV (CMIK_H)
REC_AIGUI_AUDIOIN
LO_MICRO_FACE_AV (CMIK_L)
REC_AIGUI_AUDIOIN
Alternat phonie (CPTT)
23-12-30
INTRO - Page 24
2003/03/01

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