Elta ADT 406 AP Instruction Manual
86(5¶6+$1'%22.
Documentation P/N: 03E61013 Rev B
Initial issue: Feb 15/03
Title Page
Apr 17/03
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Issued by
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14 Place Marcel Dassault
31702 BLAGNAC
France
www.elta.fr
SERIAL NUMBER LABEL
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LIST OF UPDATES
INSERTION INSERTION
UPDATE
No. ISSUE DATE BY
UPDATE
No. ISSUE DATE BY
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B INITIAL
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E.LABRIFFE
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LIST OF EFFECTIVE PAGES
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SECTION PAGE
DATE
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TITLE PAGE
LISTE OF UPDATES
LIST OF EFFECTIVE PAGE
TABLE OF ILLUSTRATIONS
LEADING PARTICULARS
TABLE OF CONTENTS
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Appendix A
Appendix B
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TABLE OF ILLUSTRATIONS Page
Figure 1 : COSPAS/SARSAT - System Principle 12
Figure 2 : ELT ADT 406 AP Presentation 14
Figure 3 : ELT ADT 406 AP – Dimensions (Basic Configuration) 15
Figure 4 : Tolerances on the Axis for Installation of the ELT ADT 406 AP 22
Figure 5 : Installation of the ELT ADT 406 AP - Drilling Pattern Dimensions 24
Figure 6 : ELT ADT 406 AP Installation - Wiring Diagram 26
Figure 7 : ELT ADT 406 AP - Detailed Description 34
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LEADING PARTICULARS
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TABLE OF CONTENTS
PAGE
1. INTRODUCTION TO THE COSPAS-SARSAT SYSTEM 11
A. The COSPAS-SARSAT system 11
B. System organization 11
C. The distress frequencies 13
D. ELTA and the COSPAS-SARSAT system 13
2. GENERAL DETAILS OF THE ELT ADT 406 AP 14
A. Purpose of the ELT ADT 406 AP 14
B. Characteristics 16
3. DESCRIPTION OF THE ELT ADT 406 AP AND OF THE AIRCRAFT COMPONENTS 18
A. General description 18
B. Detailed description 18
4. INSTALLATION OF THE ELT ADT 406 AP 22
A. General 22
B. Installation of the beacon on the aircraft 22
C. External antenna installation 25
D. Remote control unit installation 25
E. Installation and configuration of the beacon 27
5. UTILIZATION OF THE ELT ADT 406 AP 28
A. Automatic activation 28
B. Manual activation 28
C. Beacon shutdown 30
D. Beacon self-test 30
6. MAINTENANCE OF THE ELT ADT 406 AP 32
A. Beacon self-test 32
B. Maintenance periodicity table 32
C. Battery replacement 32
D. Battery discarding 33
E. Test to do at the time of a beacon return in workshop 33
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1. INTRODUCTION TO THE COSPAS-SARSAT SYSTEM
A. The COSPAS-SARSAT* system
The purpose of the COSPAS-SARSAT satellite system is to detect and locate all distress signals transmitted
by aeronautical, maritime or land-based beacons, for the search and rescue organizations.
This program is the result of an international collaboration between the United States, Canada and France
on the one hand (SARSAT project), and Russia on the other hand (COSPAS project). These two projects
are fully compatible.
Since the first results were obtained several countries have joined the program. Several other countries
have shown an interest and will soon be joining the COSPAS-SARSAT system partners.
ELTA in relation with CNES (French National Space Agency) has developed the complete range of products
required for COSPAS-SARSAT system operation.
Following an in-depth study phase, ELTA has arrived at highly conclusive technical results, and experimental
and operational use of the "ground" equipment have proven this equipment’s reliability and ease-of-use.
B. System organization (Ref. Fig. 1)
In the COSPAS-SARSAT system, space equipment is placed on board several satellites in low near-polar
orbit to capture transmissions from emergency transmitters and to retransmit these signals to specialized
ground stations called /ocal 8ser 7erminals (LUT). These ground stations determine the position of the
emergency transmitters and then retransmit the position data to the designated 0ission &ontrol &enters
(MCC). The MCCs in turn retransmit these data to the appropriate 5escue &oordination &enters (RCC) so
that they can start the search and rescue operations.
* COSPAS-SARSAT :
COSPAS = Kosmicheskaya Sistyema Poiska Avariynych Sudov
SARSAT = Search and Rescue Satellite-Aided Tracking
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Legend :
ELT : (mergency /ocator 7ransmitter
EPIRB : (mergency 3osition ,ndicating 5adio %eacon
PLB : 3ersonal /ocator %eacon
RCC: 5escue &oordination &enters
MCC : 0ission &ontrol &enters
LUT : /ocal 8ser 7erminals
COSPAS/SARSAT – System Principle
Figure 1
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C. The distress frequencies
There are several advantages to using the 406 MHz frequency :
– Worldwide coverage: locating is not only possible in real-time within a radius of 2,500 km around the
station, but also in global mode outside this zone since the satellites memorize the messages on the 406
MHz frequency. Location process uses Doppler effect.
– Locating accuracy: 2 km as opposed to 10 to 15 km in the 121.5 MHz or 243 MHz frequencies. It should
be noted however that the 406 MHz beacons also transmit 121.5 MHz and 243 MHz signals which enable
the final approach of the rescue teams in homing mode.
– Information reliability: the structure of the digital signal transmitted by these beacons makes it possible to
be sure that there is actually a distress situation, as well as to identify automatically the mobile in distress
which is vital for rescue operations.
– Unique identification: each beacon has it’s own identification information.
D. ELTA and the COSPAS-SARSAT system
(1)406 MHz distress beacons:
These beacons transmit to the satellites a digital message which identifies them and gives their position,
as well as a signal that facilitates the final approach of the rescue teams.
They are suitable for all types of use (maritime, aeronautical and land) and can, depending on the model,
be activated manually or automatically. They are designed to function in the most extreme conditions with a
high degree of reliability.
(2)Satellites low earth orbiting:
At least four satellites are permanently operational. Since their orbit is near-polar, in the worst case every
point on Earth is overflown every two hours.
In a ground station's visibility zone, the satellites directly transmit the messages captured in that zone, and
also any messages from the zones not covered that they have stored in memory.
(3)Geo-stationary satellites are now available in the system and offer faster detection capability (close to 5
minutes) but require a GPS receiver to supply location that is sent via C/S message.
(4)Ground reception stations:
The zone effectively covered (or visibility zone) is a circle with a radius of 2,500 km around the station.
These stations receive (via the satellites) and process, in real time, the messages from the beacons
activated in their visibility zone and, in batch mode, the messages from the 406 MHz beacons activated
outside that zone and memorized by the satellites.
Automatic processing of the 406 MHz digital messages allows the beacons to be located and the carrier
mobile to be identified.
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2. GENERAL DETAILS OF THE ELT ADT 406 AP
A. Purpose of the ELT ADT 406 AP (Ref. Fig. 2)
The ELT ADT 406 AP consists of a beacon that incorporates means of attachment.
The ELT ADT 406 AP is designed to transmit a digital distress signal to satellites that are part of the
COSPAS/SARSAT SYSTEM.
These satellites transmit the captured signal to the reception stations on the ground.
This signal is transmitted on the 406.028 MHz frequency and is used to precisely locate and identify the ELT
ADT 406 AP.
It also transmits a 121.5 MHz and 243 MHz signal to facilitate the final approach of the distress scene
(homing).
It can be triggered manually or automatically by means of an acceleration sensor (G.switch in accordance to
EUROCAE ED-62 standard).
This ELT meets the latest JAR OPS and ICAO recommendations.
Any encoding protocol defined by COSPAS/SARSAT can be used with ELT ADT 406 AP including country
code assignation.
ELT ADT 406 AP- Presentation
Figure 2
Metalic stap
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ELT ADT 406 AP - Overall Dimensions
(Without optional protecting cover)
Figure 3
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B. Characteristics (Ref. Fig. 3)
(1)Approvals
ADT 406 AP is COSPAS/SARSAT approved (TAC 131, dated July 2002)
ADT 406 AP meets EUROCAE ED62 standard
ADT 406 AP is JTSO 2C91a and JTSO 2C126 (JTSO N°F.O. 0112 dated April 29, 2003)
ADT 406 AP is TSO C91a and TSO C126 (TSO letter dated June 12, 2003)
(2)Physical characteristics
(a)Beacon with support
Height : 101.3 mm
Width : 188 mm
Length : 329.3 mm
Weight : 2.1 kg or 2.15 kg with the option of a protecting cover
(b)Beacon only
Height : 101.3 mm
Width : 188 mm
Length : 234 mm (without back up antenna)
Weight : 1.7 kg (with back up antenna)
Back up antenna length : 375 mm (deployed)
(3)General characteristics
(a)External antenna
– Omnidirectionnal three-frequency antenna 50Ωaccess,
– conform to COSPAS/SARSAT and EUROCAE ED-62 specifications.
(b)Power supply
High energy batteries (2 series-connected packs), activable for 5 years. Autonomy 24 hours on 406.028
MHz and greater than 60 hours at -20°C on 121.5&243 MHz.
– Voltage : 6 VDC,
– capacity : 10.5 A/h,
– ELTA type number :00E64191,
– lithium manganese dioxide (solid cathode),
– battery servicing kit available: 02N60052 kit for one ELT
02N60053 kit for 10 ELT
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(c)Radio-electrical characteristics
1 406 MHz satellite transmitter
– Frequency : 406.028 MHz,
– transmitter power : 5 W,
– modulation : "L" two-phase,
– transmission recurrence: 50 s,
– transmission duration : 440 or 520 ms.
2 Associated homing transmitter
– Frequency : 121.5 MHz/243 Mhz or 121.5 MHz (selectable),
– 121.5 MHz transmitter power : 140 mW,
– 243 MHz transmitter power : 140 mW,
– modulation : AM (3K20A3X type) from, 1600 Hz to 300 Hz,
up to four periods per second,
– antenna gain : > 1 dBi.
(d)Environment characteristics
– Operating temperatures : -20°C to +55°C,
– storage temperatures : -55°C to +85°C.
(e)Miscellaneous characteristics
– Automatic activation level in accordance with EUROCAE ED-62 (internal G-switch).
Activation direction is selectable (4 possibe directions),
– color : orange in conformity with the international distress signal,
– self-test : transmission of one burst modulated with inverted frame synchronization
and 5s transmission of 121.5 MHz ,
automation to off position (on remote control panel),
– any COSPAS/SARSAT protocol available,
. ELT S/N
. A/C operator designator and S/N
. A/C 24 bits address
. A/C nationality and registration marking (recommended)
. Test
– any country code available,
– can operate in short or long C/S message.
For long message, location data (from on board GPS as exemple) is received from A/C data bus
through an interface module, P/N 01N6593(x)
– C/S identification stored in a transferable module to ease maintenance on ELT,
– dual antenna access
Primary for external antenna and back up antenna in case of failure detection on primary access.
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3. DESCRIPTION OF THE ELT ADT 406 AP AND OF THE AIRCRAFT COMPONENTS
A. General description
(1)Introduction
This beacon from the ADT406 family derives from the ADT 406 AF/AP model. Consequently, this beacon
features the functional capabilities of the AF/AP besides its flotation gear, the attachment interface and its
flexible antenna entirely compatible with Cospat/Sarsat.
(2)The ELT ADT 406 essentially consists of :
– an ADT 406 AP beacon transmitter
– a whip antenna,
– labels,
– an activation / identification module,
– a support.
(3)The ELT ADT 406 AP basic aircraft components consists of :
– a remote control unit,
– an external antenna.
Note : this beacon can be used in survival mode without these elements.
B. Detailed description (Ref. Fig. 7)
(1)The ADT 406 AP beacon
The ADT 406 AP beacon mainly consists of :
– a whip antenna,
– a power supply module,
– an electronic assembly,
– a mechanical assembly,
– a float.
The front face of the electronic assy is equipped with the following components :
– a REMOTE CONTROL electrical high density 15 pins female connector (10) for connecting up to the
aircraft remote control panel or programming tools,
– a BACK UP WHIP ANT. TNC female connector (13) for connecting up the antenna,
– an EXT. ANT. BNC female connector (9) for connecting up the external antenna,
– an ARMED/OFF/ON lockable toggle switch (12) for activating the beacon,
– a TX indicator light (11) indicating beacon activation (real distress and self-test).
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(2)The labels
(a)Identification label
This label indicates :
– beacon name, manufacturer details,
– the condition in which the beacon may be used (warning),
– approval number, identification, part number, service bulletin, serial number and conditions on the
use of the beacon.
(b)Connectors use label
This label gives indication on the electronic front face connectors use.
This manual suits for next models
1
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