User's Manual

SYSTEM DESCRIPTION AND INSTALLATION MANUAL
T
3
CAS/Part No.9005000
Transponder
The T
3
CAS Mode S Data Link Transponder function supplies surveillance
functions to both ground-based and airborne interrogators and communication
functions to onboard systems. The transponder also contains Mode S Specific
functions, which are dedicated links directly to onboard systems. The
transponder can be upgraded to supply an internal ADLP function. The T
3
CAS
Transponder conforms to the ARINC 718A Mode S Transponder Characteristic
for function. The T
3
CAS Transponder is fully compliant with the Mode S
Elementary and Enhanced Surveillance (ELS/EHS) selective interrogation
requirements. The transponder reports ELS Flight Identification as well as
Aircraft Intent (BDS 4,0 - Selected Altitude), Track and Turn Report (BDS 5,0 -
Roll Angle, True Track Angle, Groundspeed, Track Angle Rate, and True
Airspeed), and Speed and Heading Report (BDS 6,0 - Magnetic Heading,
Indicated Airspeed, Mach Number, Baro Altitude Rate, and Inertial Vertical
Velocity).
ADS-B IN
The TCAS also includes the ADS-B IN subfunction. The ADS-B function accepts
and decodes several types of ADS-B messages. The ADS-B message types that
are supported include: Flight Identification, Surface and Airborne Position,
Airborne Velocity, Target State and Status, and Aircraft Operational Status.
The ADS-B function receives traffic information from the 1090 MHz squitters
(ADS-B messages) and outputs a traffic report for the aircraft within the receiver
area. The function is a part of the ATSAW functionality and is performing the
underlying tracking of targets and the correlation of ADS-B and TCAS data.
The output of the ADS-B function is a graphical Display Traffic Information File
(DTIF) as well as an MCDU list of traffic within receiver range and within a
maximum number of traffic limits. This information forms the base for the higher-
level ADS-B function of In-Trail Procedures (ITP).
ADS-B OUT
The T
3
CAS transponder performs the Automatic Dependent Surveillance-
Broadcast (ADS-B) OUT function. This function transmits aircraft position
(latitude and longitude), velocity, integrity and other parameters. The T
3
CAS
transponder will automatically (no external stimulus required) transmit this
information based upon onboard navigation without knowledge of which users
are receiving its broadcast.
(2) T
3
CAS Release 2
The T
3
CAS Release 2 contains the same TSO functionality as Standard 2
including the following enhancements:
TCAS
The T
3
CAS Release 2 TCAS function has been updated to incorporate the hybrid
surveillance function. The hybrid surveillance function will be compliant to the
DO-300A definition of hybrid surveillance.
1-24
04 Nov 2014
34-45-29
Pub. No. 8600200-001, Revision 004
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