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1 Dec 2003
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MAINTENANCE MANUAL
CAS-100 COLLISION AVOIDANCE SYSTEM
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Table 8. TPA-100A TCAS Processor Leading Particulars
(cont)
Characteristic
Description
Receiver (cont)
Dynamic Minimum Trigger
Level (DMTL) Threshold
ATCRBS
MTL + 13 dB
Minimum Pulse Width
300 nsec
Maximum Pulse Rise Time
0.5
µ
sec
Delay Difference (between top and
bottom antenna channels, including
transmission lines)
0.050
µ
sec
General Requirements:
Surveillance Volume
Range Tracking Volumes
The shape and dimension of the range tracking volume is
dependent on:
•
the Mode S or ATCRBS transponders are being
interrogated
•
tracking is occurring on a directional or omni antenna
•
attenuation levels applied to the transmitted pulses from
the TCAS processor transmitter.
NOTE
Altitude Tracking Volumes
TCAS II tracks other transponder-equipped aircraft that are
in a relative range of ± 10,000 feet.
Surveillance Capacity
Minimum of 60 tracks. The 30 closest intruders go to
Collision Avoidance Algorithms.
Processor Mode S Address Capacity
Minimum of 150 addresses of defected Mode S equipped
aircraft.
System Delay
Resolution advisory within 1.5 seconds after threat intruder is
detected.
Voice Synthesizer Output Power
(speaker)
4 Watts into 8 ohms (pin programmable to lower output)
Phone Output
40 mW into 600 ohms (pin programmable to lower output)
NOTE:
The TCAS processor reduces range tracking in high density areas to reduce the number of
receptions to be processed by TCAS and for interference limiting.