Information Systems

Front 1

Aerial

Back 1

Device for transmitting and/or receiving radio waves.

Front 2

Amplitude Modulated (AM)

Back 2

The height of a carrier radio wave is modified to carry broadcast information; AM radio waves.

Front 3

Analog

Back 3

Information not coded as ons or offs or zeroes and ones.

Front 4

Antenna

Back 4

Metal wire which detects radio waves.

Front 5

Bandwidth

Back 5

The range of frequencies over which an electromagnetic wave is transmitted.

Front 6

Bar Code

Back 6

Series of black and white lines contaiing code information represnting th manufacturing country, the manufacturer and the item code.

Front 7

Boosting

Back 7

Using electricity to enhance a signal for better volume and clarity.

Front 8

Cathode Ray Tube

Back 8

Vacuum sealed space where a beam of electons is fired at a screen coated with phosphor.

Front 9

Cladding

Back 9

In terms of optical fibres; the material coating the optical fibre which is less optically dense than the core of the optical fibre.

Front 10

Code

Back 10

A collection of symbols or words used for communication.

Front 11

Coder

Back 11

Transforms information into a specific code

Front 12

Communication system

Back 12

Information transfer system.

Front 13

Compact Disc (CD)

Back 13

Think reflective metallic disc with tiny bits containing inormation for computers and/or stereos such as computer programs or music.

Front 14

CD Player

Back 14

Device for changing compact disc information into sound.

Front 15

Compression

Back 15

Part of a sound wave where the particles of matter are closest together.

Front 16

Constellation

Back 16

(in terms of satellites) a constellation is a series of satellites which together provide data cover of particular parts of the Earth.

Front 17

Crest

Back 17

The highest point of a wave equal to the densest part of a sound wave compression.

Front 18

Critical Angle

Back 18

The incident angle at which a beam of light will travel along the edge of an optically denser medium.

Front 19

Decoder

Back 19

Transforms coded information into another form.

Front 20

Demodulator

Back 20

Removes the carrier wave from the radio signal.

Front 21

Diaphragm

Back 21

Vibrating membrane in microphone or speaker.

Front 22

Digital

Back 22

On and off signals or zero and one impulses which carry information.

Front 23

Digitised

Back 23

Information transferred as a series of on or offs or zeros and ones.

Front 24

Downlink

Back 24

Electromagnetic waves transmitted from a satellite to Earth; this transmission may be at a different frequency than the uplink.

Front 25

Electromagneic spectrum (EMS)

Back 25

Electromagnetic waves