TERMIUM Plus^®

Record 1,  Textual support,  English

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, record 1, English, - constant%20false%2Dalarm%20rate

Record 1,  Textual support,  French

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, record 1, French, - taux%20de%20fausse%20alarme%20constant

Record 1,  Textual support,  Spanish

Record 2,  Textual support,  English

Record number: 2, Textual support number: 1 CONT

Consider(a) feedback control system... where the gain of the amplifier, A, can be varied by some external control from an adaptation algorithm. Another configuration places the adaptive gain element in the feedback loop.... In many cases, the total system, behaviour can be varied over a wide range by changing the gain element.  1, record 2, English, - adaptive%20gain%20element

Record 2,  Textual support,  French

Record number: 2, Textual support number: 1 OBS

Voir adaptatif, adaptativité.  1, record 2, French, - gain%20adaptatif

Record 2,  Textual support,  Spanish

Record 3,  Textual support,  English

Record number: 3, Textual support number: 1 DEF

A special type of automatic gain control(agc) used in television receivers, whereby the negative bias used to regulate RF and IF amplifier gain is derived from the synchronization pulse portion of the video signal. By excluding the picture information as a means of establishing signal strength, there is no tendency to darken bright scenes or to lighten dark scenes.  3, record 3, English, - keyed%20automatic%20gain%20control

Record 3,  Textual support,  French

Record number: 3, Textual support number: 1 DEF

Dispositif utilisé dans les récepteurs de télévisions à modulation d'amplitude négative du signal vidéo pour régler automatiquement le gain des amplificateurs RF et FI> Ce dispositif dérive sa tension de commande du détecteur vidéo uniquement durant le passage des impulsions de synchronisation. Ces dernières ont une amplitude constante supérieure à toutes les autres composantes vidéo, notamment celles de l'image. Ainsi, la C.A.G. n'est pas assujettie aux variations dues au passage d'une vue ensoleillé à une scène de nuit, par exemple.  1, record 3, French, - commande%20automatique%20de%20gain%20%C3%A0%20cr%C3%A9neaux

Record number: 3, Textual support number: 1 OBS

Ce dispositif n'existe pas dans les récepteurs français, puisque la télévision française emploie la modulation d'amplitude positive, par conséquent il faudra utiliser d'autres moyens pour obtenir les mêmes résultats.  1, record 3, French, - commande%20automatique%20de%20gain%20%C3%A0%20cr%C3%A9neaux

Record 3,  Textual support,  Spanish

Record 4,  Textual support,  English

Record number: 4, Textual support number: 1 CONT

An audio automatic gain control(AGC) amplifier is placed at the transmit output of the AEC facing towards the telephone company line interface to ensure that speech from quiet talkers is heard well at the remote location.  1, record 4, English, - quiet%20talker

Record 4,  Textual support,  French

Record 4,  Textual support,  Spanish