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EW theory > Basic Electronic Intelligence Theory > Flashcards

Basic Electronic Intelligence Theory Flashcards

1
Q

What are the 7 components of a sine wave?

A 
Wave length
Frequency
Period
Peak amplitude
Peak to peak amplitude
Phase
Cycle
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2
Q

What is polarisation?

A

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

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3
Q

What are the 4 types of polarisation?

A

Linear
Elliptical
Rotating
Circular

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4
Q

What are the 3 types of propagation?

A

Sky wave
Ground wave
Direct wave

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5
Q

What are the 2 types of ducting?

A

Surface ducting

Elevated ducting

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6
Q

What are the 5 types of fading?

A 
Polarisation 
Interference 
Selective
Skip
Absorption
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7
Q

What are the 4 components of a pulse?

A

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

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8
Q

What are the 8 pulse types?

A 
Rectangular 
Square
Saw tooth
Multipulse
Cosine squared
Exponential
Stepped
Bandwidth limited
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9
Q

Define PRI?

A

The interval between pulses from leading edge to leading edge.

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10
Q

Define PRI?

A

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

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11
Q

Define range resolution?

A

A radars ability to discriminate between 2 targets.

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12
Q

Define pulse duration?

A

The actual time a radar is transmitting measured in Us.

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13
Q

Define minimum range?

A

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

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14
Q

Define radar kilometre?

A

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

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15
Q

Define Doppler shift?

A

The difference between a transmitted frequency and a received frequency.

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16
Q

Define SSR?

A

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

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17
Q

What are the 6 types of inter pulse modulation?

A 
Stagger
Dwell and switch
Jitter
Pulse frequency modulation
Sliding
Multipulse
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18
Q

What are the advantages of inter pulse modulation?

A 
Eliminates second time round echoes
Extends MTI blind speeds
Reduces mutual interference
Extends MTUR
EPM feature
19
Q

What are the 3 intrapulse modulation types?

A

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

20
Q

What are the 3 advantages of intrapulse modulation?

A

Improved range resolution
Reduced peak power requirements
Electronic protection measure

21
Q

What are the 4 categories of scan?

A

Primary
Secondary
Combined
Passive

22
Q

What are the 7 primary scan types?

A 
Circular
Bi directional
Steady/ non scanning
Manual/ irregular scan
Raster
Spiral
Helical
23
Q

What are the 4 types of secondary scan?

A

Conical
Love switching
Monopulse
Unidirectional

24
Q

What are the 5 receiver characteristics?

A 
Sensitivity
Stability
Selectivity
Signal to noise ratio
Dynamic range
25
Q

What are the 4 antenna characteristics?

A

Bandwith
Beam width
Directivity
Gain

26
Q

What are the 8 components of a superheterodyne receiver?

A 
Antenna
Band pass filter
RF amplifiers
Mixer/ local oscillator 
I.F band pass filter
I.F amplifier
Demodulator
AF amplifier
27
Q

What are the 3 types of jamming?

A

Spot
Barrage
Sweep

28
Q

What are the 4 main references for EW?

A

ANP5327
ANP2703
ANP4303
BR67

29
Q

What are the 3 main elements of a UAS?

A

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

30
Q

What are the collection priorities?

A

.

31
Q

What are the collection requirements?

A

.

32
Q

What are the condor bands?

A

.

33
Q

What emitters are on a c-130?

A

APN-241 I band NA

34
Q

What emitters are on a Hobart class?

A

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

35
Q

What emitters are on a FFH?

A 
ceafar I E/F MF
Ceafar II D MF
Sharpeye I NA
9LV453 J FC
Cramping I/J TI
36
Q

What emitters are on a 737 wedge tail ?

A

MESA C/D EW

37
Q

What emitters are on a Canberra class?

A

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

38
Q

What emitters are on an Ahmad yani?

A

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

39
Q

What emitters are on a Diponegoro?

A

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

40
Q

What emitters are on a Martadinata?

A

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

41
Q

What emitters are on a Fatahilla?

A

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

42
Q

What emitters are on a Kapitan Pattimura?

A

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

43
Q

What emitters are on a Bung Tomo?

A

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

EW theory (1 decks)

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