Honeywell International Inc. 9PGTPL-100A Manuale Utente

Page 35

1 Mar 2006

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.

NOTE: The MILCAS-FR Processor and directional antenna are discussed in detail in 

this manual. Additional equipment is discussed to a level necessary to 
understand the overall system operation. The Mode S transponder and 
associated control units, including installation information, are discussed in 
detail in separate manuals shown in Table INTRO-1. Table INTRO-1 also 
shows other related manuals. See Figure 3 for a system simplified block 
diagram.

The basic system performs traffic alert and collision avoidance functions to provide safe 
separation between own aircraft and other aircraft equipped with Mode S transponders, 
ATCRBS Mode C transponders, or ATCRBS Mode A/C transponders.

NOTE: Mode A/C transponders are Mode A transponders that respond to Mode C 

interrogations.

System operation is separated into the major functions that follow:

(1) Surveillance Function

-

Detects the presence of Mode S or ATCRBS Mode A/C transponder-equipped 
aircraft that are within TCAS surveillance limits.

-

Determines initial range, relative bearing (if detection occurs on a directional 
antenna), and relative altitude (if aircraft is reporting altitude).

-

Computes closing range rate.

-

Determines if aircraft should be placed in track.

(2) Tracking Function

-

Tracks up to 45 combined Mode S and Mode A/C transponder-equipped intruder 
aircraft. Tracks range of intruder aircraft. Tracks the intruder's relative bearing if 
tracking occurrs on a directional antenna. Tracks the intruder's relative altitude if 
intruder reports altitude.

-

Computes the projected relative position of the intruder.

-

Computes closing range rate.

-

Computes altitude change rate if intruder reports altitude.

-

Estimates projected miss distance.

NOTE: Surveillance and tracking functions are performed by listening for Mode 

S squitters, Mode S and ATCRBS Mode C interrogation transmissions, 
and Mode S and ATCRBS Mode C reply receptions on both the top and 
bottom TCAS antennas.