- •U n I t 1 telecommunications
- •1 Read and memorize the following words and word-combinations:
- •2 Translate the following word-combinations into English:
- •Telecommunication
- •1 Find in the text English equivalents to the following Russian words and word combinations:
- •6 Fill the blanks using the words below:
- •Telephone
- •1 Using the text give derivatives from the following words and translate them into Russian:
- •2 Fill the blanks using the words below:
- •3 Answer the following questions:
- •4 Translate the following sentences from English into Russian:
- •5 Read the text, describe the principal of telephone communication
- •Radio communications
- •1 Answer the following questions:
- •3 Choose from part II the appropriate continuation of the sentences.
- •4 Translate without using a dictionary.
- •5 Look at the following short descriptions of processes:
- •1 Using the information from the first three texts translate the following one from Russian into English.
- •U n I t 2 modulation
- •1 Read and memorize the following words and word-combinations:
- •2 Translate the following word-combinations into English:
- •Modulation
- •1 Answer the following questions:
- •2 Reply to the following sentences with a suitable question:
- •3 Translate the following fragment into English using the information from the text.
- •4 Make up a summary of the text using the cliché:
- •Digital and analog modulation methods
- •1 What do the following abbreviations stand for?
- •2 Translate the following sentences into English:
- •3 Choose from part II the appropriate continuation of the sentences.
- •4 Read the following paragraph. Fill in each blank with a suitable word given below.
- •5 Translate without using a dictionary
- •6 Make a brief summary of the text.
- •Modulator and demodulator
- •1 Translate the following word-combinations into Russian:
- •2 Answer the following questions:
- •3 Read the following paragraph. Fill in each blank with a suitable word given below.
- •4 Translate without using a dictionary.
- •1 Using the information from the first three texts translate the following one from Russian into English.
- •Модуляция и помехоустойчивое кодирование
- •U n I t 3
- •1 Read and memorize the following words and word-combinations:
- •2 Translate the following word-combinations into English:
- •Transmission systems
- •1 Answer the following questions:
- •2 Complete the following simple process description of the function of a terminal repeater station:
- •3 Complete the following tree diagram:
- •4 Read the following paragraph. Fill in each blank with a suitable word given below.
- •Why optical fibers are useful and how they work
- •1 Below are the advantages of optical fibers. Match them with an appropriate explanation:
- •2 Discuss the importance of the above advantages in using optical fiber in public telephone networks. Try to rank the above advantages in order of importance.
- •3 Complete the following tables:
- •4 Read the following paragraph. Fill in each blank with a suitable word given below.
- •5 Reply to the following sentences with a suitable question:
- •6 Make a brief summary of the text.
- •1 Answer the following questions:
- •2 Read the following paragraph. Fill in each blank with a suitable word given below.
- •3 Translate the following sentences into English:
- •1 Using the information from the first three texts translate the following one from Russian into English.
- •Оптоволокно
- •U n I t 4
- •1 Read and memorize the following words and word-combinations:
- •2 Translate the following word-combinations into English:
- •Telephone exchanges
- •1 Answer the following questions:
- •2 Complete the following table: Main characteristics of the systems
- •3 Choose from part II the appropriate continuation of the sentences.
- •4 Put the verb in brackets into the correct tense.
- •5 Read the following paragraph. Fill in each blank with a suitable word given below.
- •6 Make up a summary of the text using the cliché:
- •Switching technologies
- •1 Integrated Digital Transmission and Switching
- •1 Complete the following table:
- •3 What are the advantages of using (large-scale) integrated circuits in an exchange?
- •4 Match the following terms with a suitable explanation:
- •5 Translate the following sentences into Russian:
- •Public Data Networks
- •1 Answer the following questions:
- •2 Match the facilities with the appropriate description:
- •3 Discuss in what situations and for which user groups the above facilities would be useful.
- •1 Using the information from the first three texts translate the following one from English into Russian.
- •Digital switches
- •Оглавление
- •Английский язык
- •246653, Г. Гомель, ул. Кирова, 34.
- •Английский язык
- •246653, Г. Гомель, ул. Кирова, 34.
1 Using the information from the first three texts translate the following one from Russian into English.
Text 4
* * *
Радиосвязь – разновидность электрической связи, при которой в качестве носителя сообщения используются радиоволны, распространяемые в беспроводном пространстве.
Передача происходит следующим образом: на передающей стороне передаваемый сигнал модулирует более высокочастотное колебание (несущую). Полученный модулированный сигнал излучается антенной в пространство. На приёмной стороне радиоволны наводят модулированный сигнал в антенне, после чего он демодулируется.
Транкинговая система – система многоканальной наземной подвижной радиосвязи без закрепления каналов за абонентами. На время связи базовые станции осуществляют автоматическое распределение радиоканалов.
Радиосвязь составляет основу мобильной связи. Сотовая связь – один из видов мобильной радиосвязи, в основе которого лежит сотовая сеть.
В настоящее время сотовая связь самая распространенная из всех видов мобильной связи, поэтому обычно мобильным телефоном называют сотовый телефон, хотя мобильными телефонами помимо сотовых являются также спутниковые телефоны, радиотелефоны и аппараты магистральной связи.
DISCUSSION
Choose one of the following for discussion:
1 What are the problems of maintaining existing analogue networks during the gradual process of modernization of the network?
2 How do you think the association of telecommunications and data processing will change your everyday life in the future?
3 The influence of direct broadcasting satellites and readily available home earth stations?
4 Discuss your country’s plans for a mobile telephone service?
5 What impact is the tremendous growth of telecommunications going to have on society?
U n I t 2 modulation
TOPICAL VOCABULARY
1 Read and memorize the following words and word-combinations:
modulator – модулятор
demodulator – демодулятор
orthogonal – ортогональный
to quantize – оцифровывать, квантовать
low pass channel – низкочастотный канал
bandpass – полоса пропускания
wavelet modulation – импульсная модуляция
trellis coded modulation – решетчато-кодированная ~
polar modulation – поляризованная ~
quadrature amplitude modulation – квадратурная амплитудная ~
single-sideband modulation – однополосная ~
vestigial sideband modulation – ~с частично подавленной боковой полосой
pulse-code modulation – импульсно-кодовая ~
pulse-width modulation – широтно-импульсная ~
on-off modulation/keying – амплитудная манипуляция (АМн)
continuous phase modulation – непрерывная фазовая ~
linear amplifier – линейный усилитель
switching amplifier – усилитель коммутации
line code – код передачи
frequency division multiplex – частотное уплотнение каналов
serial bus – последовательная шина
carrier – несущая
sub-carrier – поднесущая
suppressed carrier – подавленная несущая
pulse shaping – формирование импульсов
M-ary – М-позиционный
signal-to noise ratio – отношение сигнал/шум
band limitation – ограничение полосы
additive disturbance – аддитивные помехи
baud rate – скорость передачи