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Fibre Optics > Introduction to Fibre Optics > Flashcards

Introduction to Fibre Optics Flashcards

1
Q

What is Legislation?

A

Legislation is a law or a set of laws that have been passed by Parliament.

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2
Q

State three different pieces of legislation that are applicable to the Fibre Optic industry?

A

Health and Safety at Work Act 1974.

Control of Substances Hazardous to Health (COSHH) Regulations 2002.

Construction Design and Management (CDM) Regulations 2015.

New Roads and Street Works Act (NRSWA) 1991.

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3
Q

What powers do Statutory Undertakers have with regards to NRSWA?

A

A legal right to carry out street works.

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4
Q

State the purpose of a Standard?

A

The purpose of a standard is to provide a reliable basis for people to share the same expectations about a product or service.

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5
Q

Explain the scope of BS 50173

A

This standard covers the structure and configuration of the backbone cabling subsystems of generic cabling systems within the types of premises and/or spaces defined by the other standards in the EN 50173 series.

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6
Q

BS 50173 is divided into six sections, state which type of installations these are applicable to?

A
  • BS 50173-1 General Requirements
  • BS 50173-2 Office Spaces
  • BS 50173-3 Industrial Spaces
  • BS 50173-4 Homes
  • BS 50173-5 Data Centre Spaces
  • BS 50173-6 Distributed Building Services
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7
Q

Which British Standard should be consulted for Cable Installations utilising Outside Plant?

A

• BS 50174- Volume3 Cable Installation – Outside Plant

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8
Q

Which British Standard specifies installation standards for Electrical Installations?

A

BS 7671: (2018)

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9
Q

Which Joint Service Publication provides guidance on Laser Safety?

A
  • JSP 390 - Military laser safety manual
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10
Q

State five benefits of using Fibre Optics over Copper?

A
  • Secure
  • Safe
  • Future proof
  • Cost effective
  • Safe for the environment
  • High capacity
  • Long distances
  • Noise immunity
  • Light weight
  • Compact.
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11
Q

State four drawbacks of Fibre Optics over Copper?

A
  • Specialist technical skills and knowledge required
  • Cost of installation and test equipment
  • Cost of transmission and receiving equipment
  • Fibre optic cables can’t carry electric power
  • Delicate and easily damaged.
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12
Q

Fibre Optics use which part of the Electromagnetic Spectrum?

A

?????I Cant Find the answer?????

I think its Optical Light

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13
Q

State which Joint Service Publication provides guidance on Defence Security?

A
  • JSP 440 - Defence security manual
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14
Q

What is the System Internationale D ’Unites symbol for Micro?

A

μ

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15
Q

What is the System Internationale D ’Unites used to measure the size of an Optical Fibre Cable?

A

????P Pico????

Could be wrong?

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16
Q

Explain Bit Error Rate (BER)?

A

(BER) is the percentage of bits that have errors relative to the total number of bits received in a transmission, usually expressed as ten to a negative power.

17
Q

What is the approximate speed of light?

A

Approximately 300,000,000 m/s

18
Q

How is Wavelength measured?

A

Measured between two adjacent points on a wave (m)

19
Q

What wavelength is classed as the First Window of Operation?

A

800 - 900 nm

λ(Op) 850nm (Multimode)

20
Q

Which wavelengths are classed as the Second Window of Operation?

A

1250 - 1350nm
λ(Op) 1300nm (Multimode)
λ(Op) 1310nm (Single mode)

21
Q

Which wavelength is classed as the Third Window of Operation?

A

1530 – 1560nm

λ(Op) 1550nm (Single mode).

22
Q

What four basic elements are required to establish a Fibre Optic System?

A
  • Fibre optic Transmitter
  • Medium of transmission (low loss fibre cable)
  • Fibre optic Receiver
  • Connectors
23
Q

Which Joint Service Publication specifies the regulations for the installation of communications and information systems?

A
  • JSP 604 LEAFLET 4800 (formally JSP 480) - Manual of regulations for installation of communications and information systems.

Fibre Optics (14 decks)

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