ink density amplitude - определение. Что такое ink density amplitude
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Что (кто) такое ink density amplitude - определение

IN AMPLITUDE MODULATION, THE AMPLITUDE (SIGNAL STRENGTH) OF THE CARRIER WAVE IS VARIED IN PROPORTION TO THE WAVEFORM BEING TRANSMITTED
Amplitude Modulation; Amplitude modulated; Double-sideband reduced carrier; Amplitude modulator; Amplitude-modulation detector; Amplitude-modulation radio; Amplitude-modulation; Amplitude Based; DSBAM; Clamp tube modulation; Heising modulation; Amplitude Modulated
  • alt=Sonogram of an AM signal, showing the carrier and both sidebands vertically
  • alt=Diagrams of an AM signal, with formulas
  • alt=Animation of audio, AM and FM modulated carriers.
  • alt=Graphs illustrating how signal intelligibility increases with modulation index, but only up to 100% using standard AM.
  • Illustration of amplitude modulation
Найдено результатов: 686
India ink         
  • ''[[Cryptococcus neoformans]]'' stained with light India ink
  • Inkmaking from pine wood, as depicted in the ''Tiangong Kaiwu'' (1637)
  • A solid [[ink stick]] used for the preparation of ink
SIMPLE BLACK OR COLORED INK
Encre de chine; China ink; Chinese ink; India ink stain; Indian ink; India Ink; Black ink; Masi (india ink)
India ink (British English: Indian ink; also Chinese ink) is a simple black or coloured ink once widely used for writing and printing and now more commonly used for drawing and outlining, especially when inking comic books and comic strips. India ink is also used in medical applications.
India ink         
  • ''[[Cryptococcus neoformans]]'' stained with light India ink
  • Inkmaking from pine wood, as depicted in the ''Tiangong Kaiwu'' (1637)
  • A solid [[ink stick]] used for the preparation of ink
SIMPLE BLACK OR COLORED INK
Encre de chine; China ink; Chinese ink; India ink stain; Indian ink; India Ink; Black ink; Masi (india ink)
¦ noun North American term for Indian ink.
Indian ink         
  • ''[[Cryptococcus neoformans]]'' stained with light India ink
  • Inkmaking from pine wood, as depicted in the ''Tiangong Kaiwu'' (1637)
  • A solid [[ink stick]] used for the preparation of ink
SIMPLE BLACK OR COLORED INK
Encre de chine; China ink; Chinese ink; India ink stain; Indian ink; India Ink; Black ink; Masi (india ink)
(also N. Amer. India ink)
¦ noun deep black ink containing dispersed carbon particles, used especially in drawing and technical graphics.
Origin
C17: orig. applied to Chinese and Japanese pigments prepared in solid blocks and imported to Europe via India.
invisible ink         
  • A US$20 bill showing a visible stripe under an ultraviolet light
SUBSTANCE USED FOR WRITING WHICH IS INVISIBLE AND CAN LATER BE MADE VISIBLE
Disappearing ink; Invisible writing; Lee magic pen; Infrared dye; Sympathetic ink; Uv ink; Secret ink; Lemon juice as invisible ink; UV ink
¦ noun a type of ink used to produce writing that cannot be seen until the paper is heated or otherwise treated.
Thermochromic ink         
Thermochromic inks; Temperature-sensitive ink; Thermochromatic ink
Thermochromic ink (also called thermochromatic ink) is a type of dye that changes color when temperatures increase or decrease. Often used in the manufacture of many toys or product packaging, as well as thermometers.
Density (computer storage)         
MEASURE OF THE QUANTITY OF INFORMATION BITS THAT CAN BE STORED ON A GIVEN LENGTH OF TRACK, AREA OF SURFACE, OR IN A GIVEN VOLUME OF A COMPUTER STORAGE MEDIUM
Bit density; Data storage density; Data density; Storage density; Storage densities; Memory storage densities; Computer storage density; Constant bit-density; Memory density; Memory storage density; Areal Density (Computer Storage); Areal storage density; Areal density (computer storage)
Density is a measure of the quantity of information bits that can be stored on a given length (linear density) of track, area of surface (areal density), or in a given volume (volumetric density) of a computer storage medium. Generally, higher density is more desirable, for it allows more data to be stored in the same physical space.
Spectral density         
  • The spectral density of a [[fluorescent light]] as a function of optical wavelength shows peaks at atomic transitions, indicated by the numbered arrows.
  • The power spectrum of the measured [[cosmic microwave background radiation]] temperature anisotropy in terms of the angular scale. The solid line is a theoretical model, for comparison.
  • Spectrogram of an [[FM radio]] signal with frequency on the horizontal axis and time increasing upwards on the vertical axis.
  • The voice waveform over time (left) has a broad audio power spectrum (right).
RELATIVE IMPORTANCE OF CERTAIN FREQUENCIES IN A COMPOSITE SIGNAL
Signal frequency spectrum; Power spectrum; Spectral envelope; Power spectral density; Power-spectral density function; Spectral power density; Signal spectrum; Spectral edge frequency; Acceleration spectral density; W/Hz; DBm/Hz; Energy spectral density; Spectral density function; Spectral phase; Phase spectrum; Spectral distribution function; Spectral function; Cross-spectral density; Frequency spectrum; Spectral density (signal processing); Spectral energy density; Fluctuation spectrum; Fluctuation spectra; Amplitude spectral density; Amplitude spectrum; Cross power spectral density; Power spectra; Phase spectral density; Cross-power spectrum
The power spectrum S_{xx}(f) of a time series x(t) describes the distribution of power into frequency components composing that signal. According to Fourier analysis, any physical signal can be decomposed into a number of discrete frequencies, or a spectrum of frequencies over a continuous range.
Spectral envelope         
  • The spectral density of a [[fluorescent light]] as a function of optical wavelength shows peaks at atomic transitions, indicated by the numbered arrows.
  • The power spectrum of the measured [[cosmic microwave background radiation]] temperature anisotropy in terms of the angular scale. The solid line is a theoretical model, for comparison.
  • Spectrogram of an [[FM radio]] signal with frequency on the horizontal axis and time increasing upwards on the vertical axis.
  • The voice waveform over time (left) has a broad audio power spectrum (right).
RELATIVE IMPORTANCE OF CERTAIN FREQUENCIES IN A COMPOSITE SIGNAL
Signal frequency spectrum; Power spectrum; Spectral envelope; Power spectral density; Power-spectral density function; Spectral power density; Signal spectrum; Spectral edge frequency; Acceleration spectral density; W/Hz; DBm/Hz; Energy spectral density; Spectral density function; Spectral phase; Phase spectrum; Spectral distribution function; Spectral function; Cross-spectral density; Frequency spectrum; Spectral density (signal processing); Spectral energy density; Fluctuation spectrum; Fluctuation spectra; Amplitude spectral density; Amplitude spectrum; Cross power spectral density; Power spectra; Phase spectral density; Cross-power spectrum
A spectral envelope is the envelope curve of the amplitude spectrum. It describes one point in time (one window, to be precise).
Areal density (computer storage)         
MEASURE OF THE QUANTITY OF INFORMATION BITS THAT CAN BE STORED ON A GIVEN LENGTH OF TRACK, AREA OF SURFACE, OR IN A GIVEN VOLUME OF A COMPUTER STORAGE MEDIUM
Bit density; Data storage density; Data density; Storage density; Storage densities; Memory storage densities; Computer storage density; Constant bit-density; Memory density; Memory storage density; Areal Density (Computer Storage); Areal storage density; Areal density (computer storage)
Areal density is a measure of the quantity of information bits that can be stored on a given length of track, area of surface, or in a given volume of a computer storage medium. Generally, higher density is more desirable, for it allows more data to be stored in the same physical space.
Spectral edge frequency         
  • The spectral density of a [[fluorescent light]] as a function of optical wavelength shows peaks at atomic transitions, indicated by the numbered arrows.
  • The power spectrum of the measured [[cosmic microwave background radiation]] temperature anisotropy in terms of the angular scale. The solid line is a theoretical model, for comparison.
  • Spectrogram of an [[FM radio]] signal with frequency on the horizontal axis and time increasing upwards on the vertical axis.
  • The voice waveform over time (left) has a broad audio power spectrum (right).
RELATIVE IMPORTANCE OF CERTAIN FREQUENCIES IN A COMPOSITE SIGNAL
Signal frequency spectrum; Power spectrum; Spectral envelope; Power spectral density; Power-spectral density function; Spectral power density; Signal spectrum; Spectral edge frequency; Acceleration spectral density; W/Hz; DBm/Hz; Energy spectral density; Spectral density function; Spectral phase; Phase spectrum; Spectral distribution function; Spectral function; Cross-spectral density; Frequency spectrum; Spectral density (signal processing); Spectral energy density; Fluctuation spectrum; Fluctuation spectra; Amplitude spectral density; Amplitude spectrum; Cross power spectral density; Power spectra; Phase spectral density; Cross-power spectrum
The spectral edge frequency or SEF is a measure used in signal processing. It is usually expressed as "SEF x", which stands for the frequency below which x percent of the total power of a given signal are located.

Википедия

Amplitude modulation

Amplitude modulation (AM) is a modulation technique used in electronic communication, most commonly for transmitting messages with a radio wave. In amplitude modulation, the amplitude (signal strength) of the wave is varied in proportion to that of the message signal, such as an audio signal. This technique contrasts with angle modulation, in which either the frequency of the carrier wave is varied, as in frequency modulation, or its phase, as in phase modulation.

AM was the earliest modulation method used for transmitting audio in radio broadcasting. It was developed during the first quarter of the 20th century beginning with Roberto Landell de Moura and Reginald Fessenden's radiotelephone experiments in 1900. This original form of AM is sometimes called double-sideband amplitude modulation (DSBAM), because the standard method produces sidebands on either side of the carrier frequency. Single-sideband modulation uses bandpass filters to eliminate one of the sidebands and possibly the carrier signal, which improves the ratio of message power to total transmission power, reduces power handling requirements of line repeaters, and permits better bandwidth utilization of the transmission medium.

AM remains in use in many forms of communication in addition to AM broadcasting: shortwave radio, amateur radio, two-way radios, VHF aircraft radio, citizens band radio, and in computer modems in the form of QAM.