reference amplitude

См. также в других словарях:

• Amplitude — is the magnitude of change in the oscillating variable, with each oscillation, within an oscillating system. For instance, sound waves are oscillations in atmospheric pressure and their amplitudes are proportional to the change in pressure during …   Wikipedia

• Amplitude-shift keying — (ASK) is a form of modulation that represents digital data as variations in the amplitude of a carrier wave.The amplitude of an analog carrier signal varies in accordance with the bit stream (modulating signal), keeping frequency and phase… …   Wikipedia

• Amplitude and phase-shift keying — or Asymmetric Phase shift keying, (APSK), is a digital modulation scheme that conveys data by changing, or modulating, both the amplitude and the phase of a reference signal (the carrier wave). In other words, it combines both Amplitude shift… …   Wikipedia

• amplitude — of displacement at a point in a vibrating system is the largest value of displacement that the point attains with reference to its equilibrium position. double amplitude peak to peak amplitude static amplitude stress amplitude …   Mechanics glossary

• amplitude — (n.) 1540s, from M.Fr. amplitude or directly from L. amplitudinem (nom. amplitudo) wide extent, width, from amplus (see AMPLE (Cf. ample)). Amplitude modulation in reference to radio wave broadcast (as opposed to frequency modulation) first… …   Etymology dictionary

• Reference signal amplitude —   An ISO term.   (7811 2) The maximum average signal amplitude of the reference card connected to the master standard.   ISO Identification Cards term. The average signal amplitude of the reference medium when recorded with the test recording… …   International financial encyclopaedia

• Reference current —   An ISO term. The minimum recording current amplitude (square wave) which causes on the reference card, under the given test conditions, a readback voltage amplitude equal to 80 % of the maximum amplitude at a density of 8 ftpmm (flux… …   International financial encyclopaedia

• Amplitude Modulation Signalling System — AMSS pour Amplitude Modulation Signalling System est un système de transmission numérique conçu pour ajouter une transmission à bas débit sur les signaux de radio analogique en modulation d amplitude (AM). Les fonctionnalités offertes par AMSS… …   Wikipédia en Français

• Reference card —   An ISO term. A reference card, which shall be considered a secondary standard, comprises an ID card with a magnetic stripe consisting of secondary standard magnetic tape (computer amplitude reference) SRM 3200 …   International financial encyclopaedia

• Reference tone — PP An audio tone of fixed frequency and amplitude that occurs at the beginning of a tape or reel, allowing the operator to set the correct audio level for playback …   Audio and video glossary

• Quadrature amplitude modulation — (QAM) (Pronounced IPA|kwa:m) is a modulation scheme which conveys data by changing ( modulating ) the amplitude of two carrier waves. These two waves, usually sinusoids, are out of phase with each other by 90° and are thus called quadrature… …   Wikipedia