širina frekvencionog opsega

širina frekvencionog opsega

A measure of spectrum (frequency) use or capacity. For instance, a voice transmission by telephone requires a bandwidth of about 3000 cycles per second (3KHz). A TV channel occupies a bandwidth of 6 million cycles per second (6 MHz) in terrestrial Systems. In satellite based systems a larger bandwidth of 17.5 to 72 MHz is used to spread or "dither" the television signal in order to prevent interference.

0 0

完善词条

添加图像

词性：名词
同义词：
词汇：
行业/领域：航空航天
类别卫星
Company:
产品：
取首字母的缩写词：

添加至 My Glossary

其他语言：

类似词条

parabolična antena

航空航天; 卫星

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

航空航天; 卫星

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

šum

航空航天; 卫星

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

modulator

航空航天; 卫星

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 ...

herc (Hz)

航空航天; 卫星

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

航空航天; 卫星

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 ...