Honeywell International Inc. 9PGTPL-100A Manuale Utente

Page 43

1 Mar 2006

TPL-100A Processor / Part No. 940-0530-001

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(d) If a valid Mode S squitter message is detected, the MILACAS-FR Processor 

interrogates the intruder. If an interrogated Mode S equipped aircraft is within 
TCAS Mode S tracking range and altitude, the Mode S equipped intruder is placed 
into track. The MILACAS-FR Processor formats and transmits a 1030-MHz Mode 
S interrogation messages on the directional antenna and/or the omni antenna and 
receives a 1090-MHz Mode S reply messages on the directional antenna to 
update intruder aircraft in the Mode S track. The MILACAS-FR Processor selects 
one of four directional antenna beams to be used for directional message 
transmission and reception.

(e) The MILACAS-FR Processor does ATCRBS search, track initialization, and track 

updates. If an ATCRBS equipped aircraft is within TCAS ATCRBS tracking range 
and altitude, the ATCRBS equipped intruder is placed into track. The 
MILACAS-FR Processor formats and transmits 1030-MHz ATCRBS interrogations 
and receives 1090-MHz ATCRBS replies on the directional antenna to update 
intruder aircraft in the ATCRBS track. The MILACAS-FR Processor selects one of 
four directional antenna beams to be used for ATCRBS directional message 
transmission and reception.

NOTE: Mode S and ATCRBS interrogation and reply message formats are 

shown in Figures 4 and 5.