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Module 5 B1 > M5.10 > Flashcards

M5.10 Flashcards

1
Q

Fibre optics: What speed is coax cable preferred

A

2 to 50 mbps

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2
Q

Fibre optics: What is used to transmit data

A

Light

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3
Q

Fibre optics: How is light leakage eliminated from fibre optics

A

Surrounding the fibre with an opaque jacket

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4
Q

Figure optics: Greatest advantage of fibre optics

A

Bandwidth

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5
Q

Fibre optics: What is the relationship between length and bandwidth in parallel fibre optics

A

Bandwidth varies inversely with length

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6
Q

Fibre optics: Limitations of fibre optics

A

Need for optical/ electrical conversions maintenance

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7
Q

Fibre optics: Fibre optic data buses require what

A
  • Light source
  • Transmitter
  • Fibre optic cable
  • Receiver
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8
Q

Fibre optics: What are the 3 main parts of a fibre optic cable and what do they do

A

Core - where light travels
Cladding - reflects light back into the core
Outer jacket - protects the cable from damage

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9
Q

Fibre optics: Speed of light

A

3x10^8m/ s

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10
Q

Fibre optics: what is refraction

A

The bending of light as it passes across the boundary of one medium to another

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11
Q

Fibre optics: What is the more dense medium core or cladding

A

Core

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12
Q

Fibre optics: How do we achieve total internal refraction

A

By having the angle of incidence of the input waves is greater than the critical angle

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13
Q

Fibre optics: For rays to propagate down a fibre it must enter at what zone

A

Acceptance zone

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14
Q

Fibre optics: What is numerical aperture

A

A measure of light gathering or collecting power of a fibre optic

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15
Q

Fibre optics: what is attenuation

A

Losses of light through a fibre optic

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16
Q

Fibre optics: What is a mixture of light waves called

A

Polychromatic

17
Q

Fibre optics: what is BDP stand for

A

Bandwidth distance product

18
Q

Fibre optics: What is BDP

A

Bandwidth of fibre multiplied by length

19
Q

Fibre optics: Unit of BDP

A

MHz.km

20
Q

Fibre optics: How do we reduce losses in terminations

A

Alignment of the mated fibres

21
Q

Fibre optics: What is a common method used to prepare fibres for termination

A

The scribe and break method

22
Q

Fibre optics: What connectors do aircraft commonly use

A

SMA (sub-miniature version A)

23
Q

Fibre optics: What is a star coupler well suited for

A

Connecting a large number of terminals to the fibre optic network

24
Q

Fibre optics: Fibre optic safety precaution

A

Fibre optic light can damage eyes

Module 5 B1 (11 decks)

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