User's Manual

SYSTEM DESCRIPTION AND INSTALLATION MANUAL
TCAS 3000 Traffic Alert and Collision Avoidance System
34−43−23
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Page 1−45
15 Dec 2005
Table 1−11. XS−950 Data Link Transponder Leading Particulars(cont)
Item Specification
Airborne Data Link Processor (ADLP) Interface:
• Circuit Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . 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).
• Bus Protocol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Bus protocol meets requirements defined in ARINC
718−A for standard transponder to ADLP bus
interface.
Altimeter Interface:
• Digital Air Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ARINC 429 or 575 data format. 12.5 K bits/s
(low−speed ARINC). Two altimeter inputs (left and
right altimeters).
• Synchro Altitude . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 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.
• Encoding Altimeter . . . . . . . . . . . . . . . . . . . . . . . . . . . Gillham altitude data format. 11−wire discrete input.
Two altimeter inputs (left and right altimeters).
• Altitude Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Altitude source (left and right) selected by discrete
input.
Airframe Parameter Data Interface:
• Circuit Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . ARINC 429 input busses. High (100K bits/s) or Low
(12.5 K bits/s). Speed, auto−detected by
transponder.
• Bus Protocol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Aircraft parameters required to support Elementary
and Enhanced Surveillance (ELS/EHS) as well as
Extended Squitter. Bus protocal and input ports as
defined in ARINC 718−A, minimum subset..
Aircraft Air/Ground Status Interface . . . . . . . . . . . . . . . Two discrete inputs used to indicate the aircraft
air/ground status.
Maintenance Computer Interface:
• Circuit Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . ARINC 429 input and output bus. 12.5 K bits/s
(low−speed ARINC).