Exercise 1. Match each of the following words with its definition.
wire a device which maps the binary strings into coded bits or waveforms for transmission
wave a device which maps the source into a set of binary strings
analogue a system in which data is represented
as O or 1
digital a system in which data is represented as a continuously varying voltage
amplitude modulation a thin piece of metal for conducting electrical current
frequency modulation a wave suitable for modulation by an information-bearing signal
source encoder an electric, electromagnetic, acoustic, mechanical or other form whose physical activity rises and falls as it travels through a medium
channel encoder the deterioration in quality, level, or standard of performance
degradation to fail to reproduce accurately the characteristics of the input
distort where audio signals increase and decrease the amplitude of the carrier wave
carrier wave where voltage levels change the frequency of a carrier wave
Exercise 2. The following words are taken from three modes of transmission: wire, radio and optical. Link each term with the most appropriate mode of transmission.
●Antenna ●coaxial cable ●copper wire ●fibre optic cable
●laser ●light-emitting diode ●microwave ●repeater
●satellite ●single-wire line ●transmitter ●wavelength
Wire ____________________________________________
Radio ___________________________________________
Optical __________________________________________
Exercise 3. The following extract is taken from a description for a telecommunications technology course. Complete the text by choosing a suitable word or phrase from the list.
Sharing, laser, information, electromagnetic transmission, direct, converting analogue, transmit signals