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Electronics > Intro to Fundamentals > Flashcards

Intro to Fundamentals Flashcards

1
Q

The OPSEC Process

A
  1. Identify CRITICAL INFORMATION
  2. Analyze THREATS
  3. Analyze VULNERABILITIES
  4. Assess the RISKS
  5. Apply COUNTERMEASURES
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2
Q

Communications System Process

A
  1. Information Source
  2. Transmitter
  3. Medium/Channel
  4. Receiver
  5. Information Destination
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3
Q

[comms system] Information Source

A
  • audio
  • video
  • data
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4
Q

[comms system] Transmitter

A
  • analog

- digital

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5
Q

[comms system] Medium/Channel

A
  • wired
  • optical fiber
  • wireless
  • structure borne
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6
Q

[comms system] Medium/Channel (considerations)

A
  • Amplification
  • Noise
  • Attenuation
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7
Q

[comms system] Receiver

A
  • analog

- digital

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8
Q

[comms system] Information Destination

A
  • audio
  • video
  • data
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9
Q

Multiplexing

A
  1. Frequency Division
  2. Time Division
  3. Code Division
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10
Q

Mechanical

A

An energy wave front that requires a medium to propagate.

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11
Q

Electrical

A

An electrical potential between two conductors; requires conductors to propogate.

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12
Q

Electromagnetic

A

Does not require a medium; the signal is in the electromagnetic fields in free space.

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13
Q

Transducer

A

Any device that converts one form of energy to another.

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14
Q

Time Domain

A

Amplitude (y) and Time (x)

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15
Q

Frequency Domain

A

Amplitude (y) and Frequency (x)

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16
Q

Hertz

A

Cycles per second

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17
Q

Relationship between frequency and period

A

They are INVERSELY related

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18
Q

Wavelength (m)

A

300 / Frequency

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19
Q

Frequency (Hz)

A

300 / Wavelength

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20
Q

Phase

A

A signal shift in time; given in degress.

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21
Q

Time Domain Measurements

A

Amplitude, period, and phase

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22
Q

L band

A

1-2 GHz

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23
Q

S band

A

2-4 GHz

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24
Q

C band

A

4-8 GHz

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25
Q

X band

26
Q

Ku band

27
Q

K band

28
Q

Ka band

29
Q

V band

30
Q

W band

A

75-111 GHz

31
Q

Longitudinal Waves

A

Vibrate in the direction of progogation.

32
Q

Transverse Waves

A

Vibrate at right angles to the direction of propogation.

33
Q

50Ω (transmission line impedance)

A
  • Radio receivers
  • Signal processing equipment
  • Amplifiers
  • Antenna
34
Q

75Ω (transmission line impedance)

A

TV cable and receivers

35
Q

300Ω (transmission line impedance)

A

Broadcast FM antennas

36
Q

Splitter vs. T-connector

37
Q

Impedance

A

Defined by a cable’s capacitance and inductance.

38
Q

Capacitance and Inductance

A
  • diameter of conductors
  • distance between conductors
  • dielectric between conductors
39
Q

Transition point from Near to Far Field

A

5 wavelengths (λ)

40
Q

6 dB loss

A

Doubled the distance

41
Q

3 dB loss

A

Distance increased 50%

42
Q

6 dB gain

A

Halved the distance

43
Q

3 dB gain

A

Quartered the distance

44
Q

Formula for Power

A

P = 1 / d^2

45
Q

Receiver at 90° off transmitter

A

Results in dB reduction

46
Q

Checking voltage in AC-mode

A

Never reads a negative value

47
Q

Flitering

A

Removing unwanted frequency

48
Q

Change Detection (to compare changes)

A
  • Differential

- Flip-flop

49
Q

Bias

A

A tendency, inclination, or prejudice toward or against something or someone.

50
Q

Heuristics

A

Mental shortcuts that allow people to solve problems and make judgements quickly and efficiently.

51
Q

Critical Thinking questions

A
  • What do I know?
  • What don’t I know?
  • What do I need to know?
  • What is missing that I expect to see?
52
Q

Procedural Guide 1

A

Conduct a survey.

53
Q

Procedural Guide 2

A

Requirements for reporting and testing penetrations.

54
Q

Procedural Guide 3

A

Requirements for reporting hazards.

55
Q

Multipath

A

Multiple paths of signal between transmitter and receiver due to reflection, scattering, and diffraction.

56
Q

As-built Drawings (complete)

A

All changes + change orders + red line drawings

57
Q

Floor Plan

A

View from above

58
Q

Plane

A

A horizontal section through a building

59
Q

Key Components of IDS

A
  • Keypads
  • Contacts/sensors
  • Panel/controller
  • Annunciator
60
Q

Defensive OPSEC Considerations

A
  • Critical Information
  • Threats
  • Vulnerabilites
61
Q

Offensive OPSEC Considerations

A
  • Available Information
  • Technical Feasibility
  • Access

Electronics (13 decks)

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