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Block 13 > Unit 1b: Selective Identification Feature (SIF) > Flashcards

Unit 1b: Selective Identification Feature (SIF) Flashcards

1
Q

What does an airborne transponder provide the radar operator with

A

Aircraft Security Info
Personnel Identification
Traffic Identification
Altitude

(S P T E E A S)

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2
Q

What does AIMS stand for

A

ATCRBS IFF/SIF Mark XII System

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3
Q

How many SIF modes are there and what are they

A

4; Mode 1, 2, 3/A, and C

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4
Q

What mode is security identification military only and displays 00-73

A

Mode 1

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5
Q

What mode is personal identification and is military only and displays 0000-7777

A

Mode 2

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6
Q

What mode is traffic identification and is used by military and civilian and displays 0000-7777

A

Mode 3/A

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7
Q

What mode is barometric Altitude and is used by military and civilian

A

Mode C

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8
Q

What modes are found in the control box

A

Mode 1 and 3/A

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9
Q

What mode is found in the R/T

A

Mode 2

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10
Q

What mode is found in the CADC Altitude Encoder

A

Mode C

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11
Q

The altitude transmitted on mode C is referenced to ______ inches of mercury

A

29.92 inches of mercury

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12
Q

What interrogator deals with Mode 3/A and C only. It only cares about Traffic Identification and Altitude

A

Ground Based (ATC)

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13
Q

What interrogator deals with all four modes

A

Airborne (AC and W)

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14
Q

What is the input power of the SIF

A

28 VDC

115 VAC 400 Hz

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15
Q

What is the frequency of the Receiver and dBm for Normal and Low Sensitivity

A

1030 MHz
Norm: 78dBm
Low: 66 dBm

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16
Q

What is the frequency of the transmitter and power out

A

1090 MHz

400 W peak min

17
Q

What is displayed in Emergency mode in Mode 3/A

A

7700

18
Q

What are the components of the SIF

A

Control Box, R/T, In-Flight Test Set, Mount

19
Q

What component decodes and interrogates

A

R/T

20
Q

What is omnidirectional and is found on the Top and Bottom of the Aircraft

A

Antennas

21
Q

What component digitizes

A

Altitude Digitizer

22
Q

What component Encodes to Mode C at 100 ft increments

A

Altitude Encoder

23
Q

What component has Go/No-Go Indication and is optional

A

In Flight Test Set

24
Q

What causes the ground radar to produce a shrinking circle around the displayed target.

A

Identify Position (I/P)

25
Q

What is the framing pulse

A

20.3 microseconds

26
Q

What Mode deals with improved azimuth accuracy and has a unique 24 bit ID

A

Mode S

Block 13 (5 decks)

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