User's Manual
SYSTEM DESCRIPTION AND INSTALLATION MANUAL
TCAS 3000 Traffic Alert and Collision Avoidance System
34−43−23
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Page 1−50
15 Dec 2005
Table 1−12. RCZ−852 Diversity Mode S Transponder Leading Particulars (cont)
Item Specification
• Exception . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . COMM−D messages are not processed by this
transponder.
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).
• IAC Air Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Radio System Bus (RSB) interface supplies the
Honeywell Integrated Avionics Computer (IAC)
digital air data information. Two altimeter inputs (left
and right altimeters).
• Encoding Altimeter . . . . . . . . . . . . . . . . . . . . . . . . . . . Gillham altitude data format. 11−wire discrete input.
Two altimeter inputs (left and right altimeters).
• Altitude Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Altitude source (left or right) selected by a discrete
input.
Flight Identifier Interface:
• From Radio Management (RMU) . . . . . . . . . . . . . . . Flight identifier input from the RMU in RSB data
format.
• From Flight Management System (FMS) . . . . . . . . Flight identifier input from the FMS in ARINC 429
data format. 12.5 K bits/s (low−speed ARINC).
Aircraft Air/Ground Status Interface . . . . . . . . . . . . . . . Two discrete inputs used to indicate the aircraft
air/ground status.
Antenna Selection Interface . . . . . . . . . . . . . . . . . . . . . . A discrete output supplies a GROUND when
transponder is active.
RCB Interface:
• Circuit Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . 2−wire full duplex RS−232 serial link to/from internal
radio communications bus (RCB).
• Transmission Rate . . . . . . . . . . . . . . . . . . . . . . . . . . . 187.5 K baud
• Transmission Format . . . . . . . . . . . . . . . . . . . . . . . . . 1 start bit, 8 data bits and 1 stop bit
Shop Flash Memory Programming Interface:
• Circuit Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . 2−wire full duplex RS−232 serial port
• Transmission Rate . . . . . . . . . . . . . . . . . . . . . . . . . . . 19.2 K baud
• Transmission Format . . . . . . . . . . . . . . . . . . . . . . . . . 1 start bit, 7 data bits, odd parity and 1 stop bit