modulator

modulator

A device which modulates a carrier. Modulators are found as components in broadcasting transmitters and in satellite transponders. Modulators are also used by CATV companies to place a baseband video television signal onto a desired VHF or UHF channel. Home video tape recorders also have built-in modulators which enable the recorded video information to be played back using a television receiver tuned to VHF channel 3 or 4.

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行业/领域：航空航天
类别卫星
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modul

教育; 教学

A separate unit or selection of material that forms a coherent whole, but may be combined with other units.

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The ratio of normal stress to the longitudinal strain produced in a body.

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The time that it takes a satellite to complete one circumnavigation of its orbit.

šum

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Any unwanted and unmodulated energy that is always present to some extent within any signal.

herc (Hz)

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The name given to the basic measure of radio frequency characteristics. An electromagnetic wave completes a full oscillation from its positive to its negative pole and back again ...

interferencija

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Energy which tends to interfere with the reception of the desired signals, such as fading from airline flights, RF interference from adjacent channels, or ghosting from reflecting ...

inklinacija

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The angle between the orbital plane of a satellite and the equatorial plane of the earth.

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