TERMIUM Plus^®

Fiche 1,  Justifications,  Anglais

Record number: 1, Textual support number: 1 OBS

Constant False-alarm Rate(CFAR). A constant false-alarm rate in the presence of variable levels of noise is usually a requirement placed on any modern radar. It is easily achieved in CW radars by use of filter banks. The energy reaching the filter bank is restricted either by automatic gain control or, when feasible, by limiting, and the thresholds in the circuitry following the filter bank are properly set with respect to the level in the total band. In a typical setting technique, random noise is injected into the amplifier that drives the filter bank, and each threshold is set to achieve the desired false-alarm rate. The level of noise is then varied and the threshold rechecked. If the limiting is proper, the false-alarm rate should not change. However, target signals in the absence of noise are unaffected, as they do not change the total energy present in the broad doppler spectrum sufficiently to reach the limiting level.  1, fiche 1, Anglais, - constant%20false%2Dalarm%20rate

Fiche 1,  Justifications,  Français

Record number: 1, Textual support number: 1 OBS

taux prédéterminé pour permettre à un récepteur de recevoir des échos de fausses cibles sans les traiter comme échos de cibles réelles.  5, fiche 1, Français, - taux%20de%20fausse%20alarme%20constant

Fiche 1,  Justifications,  Espagnol

Fiche 2,  Justifications,  Anglais

Record number: 2, Textual support number: 1 DEF

A pulse amplifier providing an amplified output pulse only for that portion of an input signal which exceeds a predetermined threshold value.  1, fiche 2, Anglais, - biased%20pulse%20amplifier

Fiche 2,  Justifications,  Français

Record number: 2, Textual support number: 1 DEF

Amplificateur d'impulsions qui fournit une impulsion de sortie amplifiée seulement pour la partie de chaque signal d'entrée qui excède un seuil prédéterminé.  1, fiche 2, Français, - amplificateur%20d%27impulsions%20%C3%A0%20seuil

Fiche 2,  Justifications,  Espagnol

Fiche 3,  Justifications,  Anglais

Record number: 3, Textual support number: 1 CONT

Total neutron counting accepts all pulses arising from neutron reactions(events) in the sensitive volume of a detector. No attempt is made to isolate events that occur nearly simultaneously as is done in coincidence counting... All detector events producing an amplifier output pulse with an amplitude greater than a threshold set by the integral discriminator are counted for a set time in a scaler.  1, fiche 3, Anglais, - total%20neutron%20counting

Fiche 3,  Justifications,  Français

Record number: 3, Textual support number: 1 DEF

Détection de l'ensemble des neutrons émis par [un] contaminant indépendamment de leur origine : fissions spontanées, réactions ([alpha], n) [...]  1, fiche 3, Français, - comptage%20neutronique%20total

Fiche 3,  Justifications,  Espagnol

Fiche 4,  Justifications,  Anglais

Record number: 4, Textual support number: 1 DEF

The discharge current at which the gain of the laser just equals the losses.  3, fiche 4, Anglais, - lasing%20threshold

Record number: 4, Textual support number: 2 DEF

The lowest excitation level at which a laser’s output is dominated by stimulated emission rather than spontaneous emission.  4, fiche 4, Anglais, - lasing%20threshold

Record number: 4, Textual support number: 1 CONT

Light radiates from the laser in a narrow-angled cone. As the current increases, the optical amplifier gain increases. When the amplifier gain equals the mirror loss, the lasing threshold is reached; the laser begins to oscillate above threshold current.  5, fiche 4, Anglais, - lasing%20threshold

Fiche 4,  Justifications,  Français

Record number: 4, Textual support number: 1 DEF

seuil laser : Énergie minimum d'excitation nécessaire pour le fonctionnement de l'oscillateur laser.  4, fiche 4, Français, - seuil%20laser

Fiche 4,  Justifications,  Espagnol

Fiche 5,  Justifications,  Anglais

Record number: 5, Textual support number: 1 DEF

A pulse amplifier which, within the limits of its normal operating characteristics, has a constant gain for that portion of an input pulse that exceeds the threshold value and that produces no output for pulses whose amplitude is below the threshold.  1, fiche 5, Anglais, - biased%20linear%20pulse%20amplifier

Fiche 5,  Justifications,  Français

Record number: 5, Textual support number: 1 DEF

Un amplificateur d'impulsion qui, à l'intérieur des limites de ses caractéristiques opérationnelles normales, possède un gain constant pour la portion de son impulsion de sortie qui excède la valeur de seuil et qui ne donne pas de sortie pour des impulsions dont l'amplitude est en-dessous du seuil.  1, fiche 5, Français, - amplificateur%20d%27impulsions%20lin%C3%A9aires%20biais%C3%A9es

Fiche 5,  Justifications,  Espagnol