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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เพิ่มภาพ

ส่วนหนึ่งของคำพูด: noun
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Blossary:
อุตสาหกรรม/ขอบเขต: Aerospace
Category: Satellites
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modul

Education; Teaching

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

modul elastičnosti

Physics; General physics

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

modul tvrdoće

Physics; General physics

The ratio of tangential stress to the shear strain produced in a body.

Jangov modul elastičnosti

Physics; General physics

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

parabolična antena

Aerospace; Satellites

The most frequently found satellite TV antenna, it takes its name from the shape of the dish described mathematically as a parabola. The function of the parabolic shape is to ...

orbitalni period

Aerospace; Satellites

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

šum

Aerospace; Satellites

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

herc (Hz)

Aerospace; Satellites

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

Aerospace; Satellites

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 ...