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Mod 13 > TCAS > Flashcards

TCAS Flashcards

1
Q

How is TCAS directionality is achieved?

A

By inserting a different electrical phase delay into each of the rf signals applied to the antenna

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2
Q

How does TCAS detect mode S aircraft?

A

By listening for squitter transmissions

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3
Q

What do Mode A and Mode C transmit?

A

A= Ident
C= Altitude
S= Address

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4
Q

How are mode S transmissions coded?

A

Differential Phase Shift Keying

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5
Q

What code are mode S replies?

A

Pulse Position Modulation

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6
Q

How are mode C replies transmitted?

A

Gilham code (altitude)

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7
Q

How far away are proximate traffic?

A

Within 1200ft (white filled diamond)

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8
Q

Which frequencies does TCAS use?

A

Interrogation 1030 MHz
Reply 1090Mhz

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9
Q

What are the intervals between pulses for TCAS transmissions?

A

Mode A: 8 microseconds
Mode C: 21 microseconds

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10
Q

Which pulses are used for side lobe suppression?

A

P2 and P5

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Mod 13 (4 decks)

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