Basic Electronic Intelligence Theory

Question 1

What are the 7 components of a sine wave?

Answer 1

Wave length
Frequency
Period
Peak amplitude
Peak to peak amplitude
Phase
Cycle

Question 2

What is polarisation?

Answer 2

The direction of plane of the E field of an EM wave radiated from an antenna. Generally relative to the earths surface.

Question 3

What are the 4 types of polarisation?

Answer 3

Linear
Elliptical
Rotating
Circular

Question 4

What are the 3 types of propagation?

Answer 4

Sky wave
Ground wave
Direct wave

Question 5

What are the 2 types of ducting?

Answer 5

Surface ducting

Elevated ducting

Question 6

What are the 5 types of fading?

Answer 6

Polarisation 
Interference 
Selective
Skip
Absorption

Question 7

What are the 4 components of a pulse?

Answer 7

Rise time 10% to 90%
Decay time 90% to 10%
Pulse width 70% to 70%
Pulse amplitude

Question 8

What are the 8 pulse types?

Answer 8

Rectangular 
Square
Saw tooth
Multipulse
Cosine squared
Exponential
Stepped
Bandwidth limited

Question 9

Define PRI?

Answer 9

The interval between pulses from leading edge to leading edge.

Question 10

Define PRI?

Answer 10

The number of pulses generated by a radar in one second.

Question 11

Define range resolution?

Answer 11

A radars ability to discriminate between 2 targets.

Question 12

Define pulse duration?

Answer 12

The actual time a radar is transmitting measured in Us.

Question 13

Define minimum range?

Answer 13

The minimum range from a radar that a target can be detected.

Question 14

Define radar kilometre?

Answer 14

The time it takes a transmitted pulse to travel 1 kilometre and back.

Question 15

Define Doppler shift?

Answer 15

The difference between a transmitted frequency and a received frequency.

Question 16

Define SSR?

Answer 16

An interrogator sends out a signal that is received by a transponder. The transponder may reply to determine if it’s friendly.

Question 17

What are the 6 types of inter pulse modulation?

Answer 17

Stagger
Dwell and switch
Jitter
Pulse frequency modulation
Sliding
Multipulse

Question 18

What are the advantages of inter pulse modulation?

Answer 18

Eliminates second time round echoes
Extends MTI blind speeds
Reduces mutual interference
Extends MTUR
EPM feature

Question 19

What are the 3 intrapulse modulation types?

Answer 19

Frequency modulation on the pulse
Amplitude modulation on the pulse
Phase modulation on the pulse

Question 20

What are the 3 advantages of intrapulse modulation?

Answer 20

Improved range resolution
Reduced peak power requirements
Electronic protection measure

Question 21

What are the 4 categories of scan?

Answer 21

Primary
Secondary
Combined
Passive

Question 22

What are the 7 primary scan types?

Answer 22

Circular
Bi directional
Steady/ non scanning
Manual/ irregular scan
Raster
Spiral
Helical

Question 23

What are the 4 types of secondary scan?

Answer 23

Conical
Love switching
Monopulse
Unidirectional

Question 24

What are the 5 receiver characteristics?

Answer 24

Sensitivity
Stability
Selectivity
Signal to noise ratio
Dynamic range

Question 25

What are the 4 antenna characteristics?

Answer 25

Bandwith Beam width Directivity Gain

Question 26

What are the 8 components of a superheterodyne receiver?

Answer 26

``` Antenna Band pass filter RF amplifiers Mixer/ local oscillator I.F band pass filter I.F amplifier Demodulator AF amplifier ```

Question 27

What are the 3 types of jamming?

Answer 27

Spot Barrage Sweep

Question 28

What are the 4 main references for EW?

Answer 28

ANP5327 ANP2703 ANP4303 BR67

Question 29

What are the 3 main elements of a UAS?

Answer 29

At least 2 UAV’s A ground control station A communication link

Question 30

What are the collection priorities?

Answer 30

.

Question 31

What are the collection requirements?

Answer 31

.

Question 32

What are the condor bands?

Answer 32

.

Question 33

What emitters are on a c-130?

Answer 33

APN-241 I band NA

Question 34

What emitters are on a Hobart class?

Answer 34

SPY-1D E/F MF SPQ-9B I SS SPG-62 I/J FC Radarpilot 1100 I NA

Question 35

What emitters are on a FFH?

Answer 35

``` ceafar I E/F MF Ceafar II D MF Sharpeye I NA 9LV453 J FC Cramping I/J TI ```

Question 36

What emitters are on a 737 wedge tail ?

Answer 36

MESA C/D EW

Question 37

What emitters are on a Canberra class?

Answer 37

Giraffe AMB G/H MF Sharpeye E/F HC Visionmaster F/I NA

Question 38

What emitters are on an Ahmad yani?

Answer 38

LW03 D EW DA05 E/F SS Rascal Decca 1229 I NA M45 F/I FC

Question 39

What emitters are on a Diponegoro?

Answer 39

Bridgemaster-E F/I NA MW08 G TA Lirod mk 2 K FC

Question 40

What emitters are on a Martadinata?

Answer 40

Smart-S mk 2 E/F SS STIR 1.2 mk 2 I FC SCOUT 2 I NA

Question 41

What emitters are on a Fatahilla?

Answer 41

DA05 E/F SS Decca 1229 I NA WM28 I MF SCANTER 4100 I AS

Question 42

What emitters are on a Kapitan Pattimura?

Answer 42

Strut curve F EW MUFF COB HH AA KH5000 F/I NA TR47C J FC

Question 43

What emitters are on a Bung Tomo?

Answer 43

Type 1007 I NA AWS 9 E/F EW/SS MARCONI1802 I/J FC