TERMIUM Plus^®

Fiche 1,  Justifications,  Anglais

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Low-power modulation. In an AM transmitter modulation of an RF stage prior to the final high-power stage. This system has the advantage that the modulator need only be of low power but the stage following the modulated amplifier must be linear to avoid distortion of the modulation envelope.  3, fiche 1, Anglais, - low%2Dpower%20modulation

Fiche 1,  Justifications,  Français

Fiche 1,  Justifications,  Espagnol

Record number: 1, Textual support number: 1 DEF

Modulación de la portadora de un transmisor de radio efectuada en una etapa anterior al amplificador de radiofrecuencia final.  2, fiche 1, Espagnol, - modulaci%C3%B3n%20a%20bajo%20nivel

Fiche 2,  Justifications,  Anglais

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A procedure used to reduce the field of view of a [flame] detector by means of an opaque plate or card with a selected sized opening. This is frequently required to reduce refractory interference to acceptable levels.  2, fiche 2, Anglais, - orificing

Record number: 2, Textual support number: 1 CONT

The S512 with its PbS photo detector has a linear response from low to medium brightness flames, that is, no distortion of flame signal occurs with regard to any amplifier saturation or AGC action(compression). However, saturation will occur with the PbS element on bright flame. This condition can easily be rectified by using orificing(placing disk with small aperture in front of lens to reduce the amount of light or radiation).  3, fiche 2, Anglais, - orificing

Fiche 2,  Justifications,  Français

Record number: 2, Textual support number: 1 DEF

Action d'occulter (une source lumineuse); [...]  1, fiche 2, Français, - occultation

Fiche 2,  Justifications,  Espagnol

Fiche 3,  Justifications,  Anglais

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The point at which an increased input signal no longer increases the amplifier output.  3, fiche 3, Anglais, - amplifier%20saturation

Record number: 3, Textual support number: 1 CONT

The S512 with its PbS [lead sulfide] photo detector has a linear response from low to medium brightness flames, that is, no distortion of flame signal occurs with regard to any amplifier saturation or AGC action(compression), However, saturation will occur with the PbS element on bright flame. This condition can easily be rectified by using orificing(placing disk with small aperture in front of lens to reduce the amount of light or radiation).  4, fiche 3, Anglais, - amplifier%20saturation

Record number: 3, Textual support number: 1 OBS

flame signal amplifier: the part of the flame detection system which increases the flame signal to a magnitude sufficient to pull in the flame relay in the flame safeguard control.  3, fiche 3, Anglais, - amplifier%20saturation

Fiche 3,  Justifications,  Français

Record number: 3, Textual support number: 1 CONT

Le convertisseur à résistance négative, étudié en préliminaire, est utilisé pour compenser les pertes d'un circuit LC, en particulier celles de l'inductance. On enregistre alors la «naissance» de l'oscillation qui permet de mettre en évidence la partie à croissance exponentielle et la stabilisation de l'amplitude due à la saturation de l'amplificateur.  2, fiche 3, Français, - saturation%20de%20l%27amplificateur

Fiche 3,  Justifications,  Espagnol

Fiche 4,  Justifications,  Français

Fiche 4,  Justifications,  Espagnol

Fiche 5,  Justifications,  Anglais

Record number: 5, Textual support number: 1 CONT

The [DFM] meter indicates the distortion factor, which is the ratio of the rms total distortion to the amplitude of the fundamental frequency, including harmonics.  2, fiche 5, Anglais, - distortion%20factor

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A common measurement is total harmonic distortion(thd) where the fundamental of a very low distortion sine-wave test signal is removed by a steep notch filter. The summed harmonics that remain are then measured as a voltage of the fundamental at the required test power of the amplifier.(When measured in this manner the term thd is not really correct since the distortion also has the amplifier noise added to it within the test passband. The correct term is distortion factor).(GRAEL, 1977, p. 326).  3, fiche 5, Anglais, - distortion%20factor

Fiche 5,  Justifications,  Français

Record number: 5, Textual support number: 1 CONT

[Dans le Teac AS M50] les taux de distorsion restent très faibles quelle que soit la puissance, et (...) la décroissance des amplitudes dans l'analyse du spectre de distorsion par harmoniques est régulière.  1, fiche 5, Français, - taux%20de%20distorsion

Fiche 5,  Justifications,  Espagnol

Fiche 6,  Justifications,  Anglais

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The range of audio frequencies over which an amplifier can produce half its rated power without exceeding its rated distortion. It is determined by using a measurement procedure standardized by the Institute of High Fidelity(IHF). This specification indicates how much power is available at the critical high and low frequencies.  2, fiche 6, Anglais, - power%20bandwidth

Record number: 6, Textual support number: 1 OBS

This equivalence is valid in the case of amplifiers.  3, fiche 6, Anglais, - power%20bandwidth

Fiche 6,  Justifications,  Français

Record number: 6, Textual support number: 1 CONT

La bande passante correspond à la gamme de fréquences sonores (en hertz) à laquelle l'amplificateur fournit son taux de puissance de sortie, sans dépasser son taux de distorsion harmonique. Par exemple, en pratique, si la puissance de sortie d'un ampli est de 20 watts par canal, avec une distorsion de 1% et une bande passante de 20 à 30 000 Hz; à 10 watts cet ampli devra avoir un taux de distorsion égal ou inférieur à 1%.  1, fiche 6, Français, - bande%20passante

Record number: 6, Textual support number: 1 OBS

Cette équivalence se rapporte aux amplificateurs.  2, fiche 6, Français, - bande%20passante

Fiche 6,  Justifications,  Espagnol