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💗💗 > Cisp > Flashcards

Cisp Flashcards

1
Q

What are the 2 types of electromagnetic waves?

A
  • transverse
  • longitudinal
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2
Q

What is the standard distance for short range radio communications?

A

Approx. 50 NM

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3
Q

What is the definition of military comms?

A

The rapid transfer of information between military units and the authorities that control them.

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4
Q

What are the 3 elements of a basic communications system?

A
  • sender
  • medium/bearer
  • receiver
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5
Q

Give 3 methods of communications?

A
  • visual
  • radio
  • line
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6
Q

What is the definition of a radio comms system?

A

A radio communications system uses the medium of radio waves to transmit and receive information.

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7
Q

What is the standard distance for long range radio comms?

A

Worldwide coverage

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8
Q

Define Tactical Communications

A

Tactical communications between 2 or more mobile units, typically carried out at short range conveying operationally important information.

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9
Q

Define strategic comms

A

Long range communications with units and authorities which require the use of shore stations and convey administrative and operational information.

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10
Q

Define a radio communications system

A

A radio communications system uses the medium of radio waves to transmit and receive information.

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11
Q

What is the main RN application for SHF?

A

Radar and satellite communications.

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12
Q

What is the main RN application for ELF?

A

Not used

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13
Q

What is the main RN application for VLF?

A

Shore to submarine, strategic

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14
Q

What is the main RN application for LF?

A

Shore to ship and sub, strategic

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15
Q

What is the main RN application for MF and HF?

A

Medium and long range, tactical and strategic

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16
Q

What is the main RN application for VHF and UHF?

A

Short range tactical and long range strategic.

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17
Q

What is the main RN application for SHF?

A

Long range strategic

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18
Q

What is the main RN application for EHF?

A

Not used

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19
Q

Define propagation

A

The way in which radio waves travel through the earths atmosphere or space.

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20
Q

What range of frequencies are suitable for ground wave propagation?

A

HF and Below

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21
Q

Name the 3 method of radio wave propagation?

A
  • Ground
  • Sky
  • Space/Direct
22
Q

What is the area in the atmosphere known as that refracts a sky wave?

A

Ionosphere

23
Q

Define the term “emission designator”

A

Internationally recognised shorthand that accurately describes the construction of an emission.

24
Q

What does the 1st character of an emission designator indicate?

A

Type of modulation

25
Q

What does letter “A” indicate when it appears as the 1st character of an emission designator?

A

Amplitude modulation, double side band

26
Q

What does “2” indicate when they appear as the 2nd character of an emission designator?

A

Single channel digital

27
Q

What does “3” indicate when they appear as the 2nd character of an emission designator?

A

Single channel analogue

28
Q

What does “7” indicate when they appear as the 2nd character of an emission designator?

A

Multi-channel digital

29
Q

What does “B” indicate when they appear as the 3rd character of an emission designator?

A

RATT (telegraphy)

30
Q

What does “E” indicate when they appear as the 3rd character of an emission designator?

A

Voice (telegraphy)

31
Q

What does “D” indicate when they appear as the 3rd character of an emission designator?

A

Digital data

32
Q

What does “D” indicate when they appear as the 3rd character of an emission designator?

A

Digital data

33
Q

Breakdown the acronym “RATT”

A

Radio automatic teletype

34
Q

Define the RATT Parameter shift

A

The difference in frequency between the 2 RATT tones measured in hertz.

35
Q

Why do we offset?

A

To centre our emission around the frequency assigned.

36
Q

Define the term “frequency assigned”

A

The frequency assigned is defined as being the centre of the allocated bandwidth to be used.

37
Q

What is the standard offset for SSB (SC) voice emissions?

A

1.5KHZ or 1.4KHZ if frequency ends in .4

38
Q

State the formula for calculating the offset for a SSB (SC) RATT emission?

A

(A+Z) divided by 2

39
Q

What does FSC stand for?

A

Frequency surpressed carrier.

40
Q

What does FA stand for?

A

Frequency assigned

41
Q

What does USB stand for?

A

Upper sideband

42
Q

What does LSB stand for?

A

Lower sideband

43
Q

Define “Frequency assigned”

A

Being at the centre of the allocated bandwidth to be used.

44
Q

Define “Emission designator”

A

An internationally recognised shorthand that accurately describes the construction of an emission.

45
Q

Define military communications

A

The rapid transfer of information between military units and the authorities that control them

46
Q

Define radio communications system

A

A radio communications system uses the medium of radio waves to transmit and receive information

47
Q

Define tactical communications

A

Tactical communications between 2 or more mobile units, typically carried out at short range, conveying operationally important information.

48
Q

Define strategic communications

A

Communications with units and authorities which require the use of shore stations and convey administrative and operational information. Strategic communications are typically long-range and involve world-wide coverage.

49
Q

What layers are in the ionosphere during the day?

A

D, E, F1, F2

50
Q

What layers are in the ionosphere during the night?

A

E and D layers disappear and the F layers combine.

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