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THRESHOLD LEVEL NOISE [4 records]
Record 1 - internal organization data 2024-02-22
Record 1, English
Record 1, Subject field(s)
- Radar, Radio Guidance and Goniometry
- Radio Transmission and Reception
Record 1, Main entry term, English
- constant false-alarm rate
1, record 1, English, constant%20false%2Dalarm%20rate
correct
Record 1, Abbreviations, English
- CFAR 2, record 1, English, CFAR
correct, NATO
Record 1, Synonyms, English
- constant false alarm rate 3, record 1, English, constant%20false%20alarm%20rate
correct, NATO
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, French
Record 1, Domaine(s)
- Radar, radioguidage et radiogoniométrie
- Émission et réception radio
Record 1, Main entry term, French
- taux de fausse alarme constant
1, record 1, French, taux%20de%20fausse%20alarme%20constant
correct
Record 1, Abbreviations, French
- TFAC 2, record 1, French, TFAC
correct
Record 1, Synonyms, French
- taux constant de fausses alertes 3, record 1, French, taux%20constant%20de%20fausses%20alertes
correct, masculine noun, NATO
- CFAR 3, record 1, French, CFAR
correct, masculine noun, NATO
- CFAR 3, record 1, French, CFAR
- taux constant d'alertes erronées 4, record 1, French, taux%20constant%20d%27alertes%20erron%C3%A9es
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, Spanish
Record 1, Textual support, Spanish
Record 2 - internal organization data 2010-02-08
Record 2, English
Record 2, Subject field(s)
- Medical and Hospital Organization
Record 2, Main entry term, English
- threshold of consciousness 1, record 2, English, threshold%20of%20consciousness
Record 2, Abbreviations, English
Record 2, Synonyms, English
Record 2, Textual support, English
Record number: 2, Textual support number: 1 OBS
(dict of psychology Warren) threshold accuracy(data transmission BT 132 télégraphie et téléphonie) précision du seuil threshold level of noise(data transmission) seuil de niveau de bruit threshold margin(data transmission) marge de seuil threshold step(data transmission) échelon du seuil threshold tolerance tolérance de seuil threshold rate(Americanism 1) salaire de débutant 1, record 2, English, - threshold%20of%20consciousness
Record 2, French
Record 2, Domaine(s)
- Organisation médico-hospitalière
Record 2, Main entry term, French
- seuil de la conscience 1, record 2, French, seuil%20de%20la%20conscience
Record 2, Abbreviations, French
Record 2, Synonyms, French
Record 2, Textual support, French
Record number: 2, Textual support number: 1 OBS
(BT 30 Psychiatrie) 1, record 2, French, - seuil%20de%20la%20conscience
Record 2, Spanish
Record 2, Textual support, Spanish
Record 3 - internal organization data 2001-02-08
Record 3, English
Record 3, Subject field(s)
- Electronic Circuits Technology
Record 3, Main entry term, English
- DC noise margin
1, record 3, English, DC%20noise%20margin
correct
Record 3, Abbreviations, English
Record 3, Synonyms, English
Record 3, Textual support, English
Record number: 3, Textual support number: 1 DEF
A critical digital IC parameter; it is the difference between the normal operating logic levels and the threshold voltage with a DCM measured in millivolts, not unusual in IC' s; is likely to switch falsely if used in equipment with a higher electrical noise level. 1, record 3, English, - DC%20noise%20margin
Record 3, French
Record 3, Domaine(s)
- Technologie des circuits électroniques
Record 3, Main entry term, French
- marge de sensibilité aux parasites c.c.
1, record 3, French, marge%20de%20sensibilit%C3%A9%20aux%20parasites%20c%2Ec%2E
proposal, feminine noun
Record 3, Abbreviations, French
Record 3, Synonyms, French
- marge d'immunité au bruit c.c. 1, record 3, French, marge%20d%27immunit%C3%A9%20au%20bruit%20c%2Ec%2E
proposal, feminine noun
Record 3, Textual support, French
Record 3, Spanish
Record 3, Textual support, Spanish
Record 4 - internal organization data 2000-08-02
Record 4, English
Record 4, Subject field(s)
- Space Exploration Equipment and Tools
Record 4, Main entry term, English
- lunar seismometer
1, record 4, English, lunar%20seismometer
correct
Record 4, Abbreviations, English
Record 4, Synonyms, English
Record 4, Textual support, English
Record number: 4, Textual support number: 1 CONT
Also shown on Figure 1 are the sensitivity of the Apollo lunar seismometer and the Viking Martian seismometer. Many of the detected seismic events on the Moon were barely above the sensitivity threshold of the Apollo instrument. The background noise level on the Moon was below the instrumental sensitivity except at the times of sunrise and sunset, when thermal disturbances caused large ground noise. 1, record 4, English, - lunar%20seismometer
Record 4, French
Record 4, Domaine(s)
- Équipement et outillage d'exploration spatiale
Record 4, Main entry term, French
- sismomètre lunaire
1, record 4, French, sismom%C3%A8tre%20lunaire
proposal, masculine noun
Record 4, Abbreviations, French
Record 4, Synonyms, French
Record 4, Textual support, French
Record number: 4, Textual support number: 1 OBS
sismomètre : Appareil analogue à un séismographe, mais utilisé par observations directes, sans enregistrement. 2, record 4, French, - sismom%C3%A8tre%20lunaire
Record 4, Key term(s)
- séismomètre lunaire
Record 4, Spanish
Record 4, Textual support, Spanish
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