4.14. Answer the questions to the text.

1. What does the word “television” mean?

2. When was communication satellite Intelsat launched into orbit?

3. What is uplink facility?

4. What is the downlink?

5. What is C-band transmission affected by?

6. What is a satellite dish designed for?

7. What does it consist of?

8. How does the transmitting dish operate?

9. Are there any obstacles between the satellite and the dish?

10. What is the LNBC?

11. Does the satellite receiver amplify the signal?

GRAMMAR

Attribute group

4.15. Read and translate the following groups of words.

Energy spectrum, light pulse, copper wire, potential difference, flicker noise, frequency band, charge distribution, power gain, discrete-circuit design, feedback laser, ice thickness measurement, low-power TV transmitter, radar ice probe, large-scale integrated circuit, direct electrode voltage, displaced phase centre antenna, transmission distortion measuring set.

4.16. Choose the right variant.

1. Automatic frequency correction

1. автоматическая частота коррекции

2. коррекция автоматической частоты

3. автоматическая коррекция частоты

1. Parallel-feed amplifier

   1. усилитель с параллельным питанием

   2. параллельное питание усилителя

   3. параллельный усилитель с питанием

2. Transistor equivalent circuit

   1. транзистор эквивалентной схемы

   2. эквивалентная схема транзистора

   3. транзистор с эквивалентной схемой

3. Automatic gain control

   1. автоматическая регулировка усиления

   2. усиление с автоматической регулировкой

   3. регулировка автоматического усиления

4. Integrated-circuit electron device

   1. интегральная схема электронного прибора

   2. прибор с интегральной схемой

   3. электронный прибор на интегральной схеме

5. Temperature compensated oscillator

   1. температурная компенсация генератора

   2. генератор с температурной компенсацией

   3. компенсация температуры генератора

7. Automatic data processing system

   1. автоматическая система обработки данных

   2. система автоматической обработки данных

   3. автоматическая обработка данных системы

4.17. Read and translate the following sentences.

1. The problem of microwave distribution system has been the subject of many reports in the technical press.

2. It is important to note that these microwave distribution system transmitters are not multichannel, and are effectively low-power television transmitters which operate in the microwave bands.

3. The normal technique for the high-power systems is to use an individual solid-state transmitter for each program channel, and then to combine the 2,5GHz outputs before feeding the combined signal to one or two broadband transmitting antennas.

4. The up-converter frequently consists of a balanced diode mixer with a passive output filter and a high-stability local oscillator.

5. Microwave signal strength will also vary with weather conditions.

6. Medium-power C-band (3,9 – 6,2 GHz) satellite reception equipment is available in some parts of the world at reasonable costs.

7. One advantage of 12 GHz systems is that fairly high gains can be achieved with small parabolic receiving aerials.

8. The flicker noise corner frequency of bipolar operational amplifiers ranges between 1 Hz and 100 Hz compared to 100 to 1 kHz for fet op-amp.

9. The article presents the basic design principles for a switched-range linear amplifier.

10. These systems operate well and overcome many noise-related problems.

11. Exploration of surface acoustic wave devices was paid great attention.

12. They were to study the performance of single sideband radio receivers.

9