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| Тема |
 Защо ме караш да се ровичкам из нетя? [re: HeaндepтaлeцaДжo] |
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| Автор |
Exhemus (овчар) |
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| Публикувано | 22.02.12 10:41 |
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A communications satellite's transponder, is the series of interconnected units which form a communications channel between the receiving and the transmitting antennas.[1]
A transponder is typically composed of:
An input band limiting device (a band pass filter)
An Input low-noise amplifier (LNA), designed to amplify the (normally very weak, because of the large distances involved) signals received from the earth station
A frequency translator (normally composed of an oscillator and a frequency mixer) used to convert the frequency of the received signal to the frequency required for the transmitted signal
An output band pass filter
A power amplifier (this can be a traveling-wave tube or a solid state amplifier)
Виж и
Тук съм за да разговарям с философи, овце си имам!
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