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TAUX FAUSSE ALARME [2 records]

Record 1 2013-09-23

English

Subject field(s)
  • Scientific Instruments
  • Security
CONT

Each fixed-site detector owes its great sensitivity and very low false-alarm rate to the use of two ion-mobility spectrometry sensors that are operated in tandem.

PHR

Low, high false alarm rate.

French

Domaine(s)
  • Instruments scientifiques
  • Sécurité
CONT

Chaque détecteur ponctuel transportable doit son excellente sensibilité et son très faible taux de fausse alarme aux deux détecteurs spectrométriques de mobilité ionique qui fonctionnent simultanément.

Spanish

Save record 1

Record 2 1985-12-19

English

Subject field(s)
  • Radar, Radio Guidance and Goniometry
  • Radio Transmission and Reception
CONT

Either an operator or a digital processor would like to keep the false-alarm rate reasonably constant, having the radar automatically adjust its sensitivity as the intensity of interference varies. Receivers that have this property are called CFAR (constant false-alarm rate) receivers.

French

Domaine(s)
  • Radar, radioguidage et radiogoniométrie
  • Émission et réception radio
CONT

Récepteurs à taux de fausse alarme constant. L'emploi d’un amplificateur logarithmique suivi d’une différenciation amène une certaine régulation sur le bruit du radar et le clutter, mais cela est limité et pour s’avérer insuffisant dans le cas d’un brouillage intentionnel ou accidentel. On est alors conduit à se servir de récepteurs dits à taux de fausse alarme constant(TFAC)(ou CFAR en anglais, [...]).

Spanish

Save record 2

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