User's Manual Part 1

T
2
CAS / Part No. 9000000
SYSTEM DESCRIPTION AND INSTALLATION MANUAL
34-43-20
15 Feb 2003
Use or disclosure of information on this page is subject to the restrictions in the proprietary notice of this document.
1--54
Table 1--10. XS--950 Data Link Transponder Leading Particulars(cont)
Item Specification
Airborne Data Link Processor (ADLP) Interface:
• CircuitConfiguration .......................... COMM--A/B messages have an ARINC 429 input
and output bus.
COMM--C/D messages have an ARINC 429 input
and output bus.
Both sets of busses are 100 K bits/s (high--speed
ARINC).
• BusProtocol................................. Bus protocol meets requirements defined in ARINC
718 for standard transponder to ADLP bus interface.
Altimeter Interface:
• DigitalAirData............................... ARINC 429 or 575 data format. 12.5 K bits/s
(low--speed ARINC). Two altimeter inputs (left and
right altimeters).
• SynchroAltitude ............................. ARINC 407 data format. Fine and course 3--wire
synchro inputs and a synchro valid flag discrete
input. Two sets of synchro altimeter inputs (left and
right altimeters).
• Analog Altitude (--20012, --65012 Only) .......... Three wire proportional input with valid flag discrete
input. Two altimeter inputs (left and right altimeters).
Discrete input to enable altitude comparison.
• EncodingAltimeter ........................... Gillham altitude data format. 11--wire discrete input.
T wo altimeter inputs (left and right altimeters).
Discrete input to enable altitude comparison.
• AltitudeSelection............................. Altitude source (left and right) selected by discrete
input.
Flight Identifier Interface:
• CircuitConfiguration .......................... ARINC 429 input bus. 12.5 K bits/s (low--speed
ARINC).
• BusProtocol................................. Flight identification field consists of eight ISO--5
characters input to the transponder in four ARINC
429 labels (233, 234, 235, 236) per the requirements
defined in ARINC 718.
Aircraft Air/Ground Status Interface ............... Two discrete inputs used to indicate the aircraft
air/ground status.
Maintenance Computer Interface:
• CircuitConfiguration .......................... ARINC 429 input and output bus. 12.5 K bits/s
(low--speed ARINC).
• BusProtocol................................. The maintenance computer interface meets protocol
requirements for all model Airbus, Boeing, and
McDonnell Douglas maintenance computers.