R 1EFF : 051-099, 106-149, 221-299, 301-399, 1 34-52-00Page 8 1401-499, 1Aug 01/05 1 1 1CES 1 The ATC system operates with two frequencies:
-interrogation: 1030 MHz
-reply: 1090 MHz Modes A, C and "All call" interrogations are transmitted in the form of coded pulses PPM (Pulse Position Modulation). An "All call" interrogation is an interrogation which generates Mode A or C and Mode S replies. The transponder contains data link capability, which allows it to receive uplink messages and uplink extended length messages. The transponder can transmit downlink messages.
**ON A/C ALL
B. System Architecture
**ON A/C 001-049, 051-099, 101-105, 151-199, 201-220,
(Ref. Fig. 003)
R **ON A/C 106-149, 221-299, 301-399, 401-499,
(Ref. Fig. 003A)
**ON A/C ALL
The ATC comprises two independent systems. Each system consists of: - one transponder 1SH1 (1SH2),
-two antennas 7SH1,7SH3 (7SH2,7SH4),
- one ATC/TCAS control unit 3SH common to the two systems. In addition, the Centralized Fault-Display Interface-Unit (CFDIU) 1TW enables access to the maintenance part of the ATC system through one Multipurpose Control and Display Unit (MCDU) 3CA1 (3CA2). (Ref. Fig. 004)
C. Warning The warning related to the ATC is only the FAULT or FAIL indicator light of the ATC control unit : when the system is faulty, the amber FAULT or FAIL indicator light comes on.
1EFF : ALL 1 34-52-00Page 9 1 1 Aug 01/05 1 1 1CES 1
ATC - Block Diagram
Figure 003
R 1EFF : 001-049, 051-099, 101-105, 151-199, 1 34-52-00Page 10 1201-220, 1May 01/05 1 1 1CES 1
ATC - Block Diagram Figure 003A
R 1EFF : 1 1 1CES 106-149, 221-299, 301-399, 401-499, 1 111 34-52-00 Page 11 Aug 01/05
ATC - Control & Indicating Figure 004
R 1EFF : 1 1 1CES ALL 1 111 34-52-00 Page 12 May 01/05
4. Power Supply
____________
Energization of each system is through :
-
115VAC ESS BUS SHEDDABLE 801XP via circuit breaker 5SH1 for system 1.
-
115VAC BUS 2 204XP via circuit breaker 5SH2 for system 2. Energization of the ATC control unit is through the two circuit breakers 5SH1 and 5SH2.
-------------------------------------------------------------------------------PANEL DESIGNATION IDENT. LOCATION -------------------------------------------------------------------------------49VU COM NAV/ATC/1 5SH1 G11 121VU COM NAV/ATC/2 5SH2 K07
R **ON A/C 051-099, 106-149, 221-299, 301-399, 401-499,
5. Interface
_________
**ON A/C 051-099,
(Ref. Fig. 003)
Two types of ARINC signals, ARINC 429 and ARINC 575, provide a two-way
interface between the transponder and other aircraft systems.
The ARINC 429 signals consist of 32-bit data words. The first 8 bits of the
word make up a label which specifies the type of information contained in
that word.
The ARINC 429 buses provide the following information:
-control data input
-air data input 1 and 2
-maintenance data. The low-speed 429 buses are repetitive buses that provide the transponder interfaces between:
-control panel
-altitude information from the ADIRUs
-
CFDIU. The high-speed 429 buses permit the transfer of data between the transponder and the TCAS (if installed).
A.
Control Panel Buses Control panel labels which are received from the tuning source are transmitted to the TCAS as periodic labels. Only labels which are received from the control panel are transmitted without modification to the TCAS, however the transponder must receive at least label 016 to be operational.
1EFF : ALL 1 34-52-00Page 13 1 1 Aug 01/05 1 1 1CES 1R -------------------------------------------------------------------------------R | PARAMETER LIST PARAMETER CHARACTERISTICS (NUMERIC) | R -------------------------------------------------------------------------------R |EQ.SYS.LAB.SDI|PARAMETER | WORD RANGE |UNIT|SIG |BITS|XMSN|CODE|ALPHA|SOURCE | R | |DEFINITION| OPER RANGE | |BIT | |INTV| |CODE |ORIGIN | R | |(*=REMARK)| RESOLUTION | | | | | | |BUS No.| R | |(X=NOTE) | ACCURACY | | | | | | |ATA REF| R | | | | | | | | | |CONV | R -------------------------------------------------------------------------------R | 013 |CTL WORD 1| | | | | | | | R | 015 |CTL WORD 2| | | | | | | | R | 016 |CTL WORD 3| | | | | | | | R | 031 |CTL WORD 4| | | | | | | | R -------------------------------------------------------------------------------
R NOTE : CTL WORD 1: TCAS display mode and range control information
____ R CTL WORD 2: TCAS altitude limit control information R CTL WORD 3: transponder and TCAS control information R CTL WORD 4: transponder control information, and is designed for R interface with older ATCRBS control panels.
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