Honeywell International Inc. 9PGTPL-100A Manual De Usuario
Page 53
1 Mar 2006
34-45-54
MAINTENANCE MANUAL
TPL-100A Processor / Part No. 940-0530-001
Use or disclosure of information on this page is subject to the restrictions in the proprietary notice of this document.
E. Mode S Transponder
The Mode S transponder is discussed in this manual to an extent required to understand
overall TCAS operation. For additional information refer to the applicable Mode S
transponder system maintenance manual.
overall TCAS operation. For additional information refer to the applicable Mode S
transponder system maintenance manual.
The microprocessor-based Mode S transponder has the functions that follow:
(1) Automatically transmits 1090-MHz Mode S squitter messages every second. These
squitter messages notify other TCAS equipped aircraft and ground stations that own
Mode S equipped aircraft is present.
Mode S equipped aircraft is present.
(2) Receives broadcast messages from other TCAS equipped aircraft and notifies own
MILACAS-FR Processor that a broadcast message was received.
(3) Replies to 1030-MHz Mode S interrogations from other TCAS equipped aircraft.
(4) Replies to 1030-MHz Mode A, Mode C, and Mode S interrogations from ATC ground
stations with a 1090-MHz message in the traditional manner.
(5) Transmits 1090-MHz resolution advisory air-to-air coordination message data
(received from the MILACAS-FR Processor) during threat conditions between own and
other TCAS equipped aircraft.
other TCAS equipped aircraft.
(6) Provides the data that follows to the MILACAS-FR Processor through an ARINC 429
data link:
•
Own aircraft identification code, pressure altitude, and maximum airspeed data
•
TCAS broadcast information and air-to-air resolution advisory coordination
information received from other TCAS equipped aircraft
information received from other TCAS equipped aircraft
•
TCAS sensitivity level and other mode control data received by own Mode S
transponder from own transponder/TCAS control unit
transponder from own transponder/TCAS control unit
•
TCAS sensitivity level control data from Mode S ground control stations at
1030-MHz (future application)
1030-MHz (future application)
•
Mode S ARINC 604 maintenance status.
(7) Receives TCAS capability, TCAS validity, sensitivity level, and TCAS coordination
update data from the MILACAS-FR Processor over the ARINC 429 data link. The
Mode S transponder inserts this data into 1090-MHz coordination messages (and
replies to interrogations from Mode S ground stations - future application).
Mode S transponder inserts this data into 1090-MHz coordination messages (and
replies to interrogations from Mode S ground stations - future application).