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BALAYAGE DENTS SCIE [3 records]

Record 1 2002-11-05

English

Subject field(s)
  • Radio Waves

French

Domaine(s)
  • Ondes radioélectriques

Spanish

Save record 1

Record 2 1979-03-21

English

Subject field(s)
  • Scientific Instruments
  • Scientific Measurements and Analyses
  • Radio Waves
OBS

Microwave: An electromagnetic wave which has a wavelength between about 0.3 and 30 centimeters, corresponding to frequencies of 1-100 gigahertz; however, there are no sharp boundaries distinguishing microwaves from infrared and radio waves.

OBS

Spectrum analyzer. A device which sweeps over a portion of the radio-frequency spectrum, responds to signals whose frequencies lie within the swept band, and displays them in relative magnitude and frequency on a cathode-ray-tube screen. In essence, it is a superheterodyne receiver having a local oscillator whose frequency is varied cyclically, usually at the power-line frequency.

French

Domaine(s)
  • Instruments scientifiques
  • Mesures et analyse (Sciences)
  • Ondes radioélectriques
OBS

Analyse de spectres hyperfréquences.(...) Les analyseurs de spectres donnent directement une vue panoramique de l'amplitude en fonction de la fréquence sur l'écran d’un oscillographe.(...) Principe des analyseurs.(...) l'appareil(...) est essentiellement un récepteur superhétérodyne à bande passante très étroite. Ce récepteur explore automatiquement une bande de fréquences donnée grâce à un balayage linéaire, en dents de scie, de l'oscillateur local, synchronisé avec celui de l'oscilloscope.

OBS

Hyperfréquences. Ce terme désigne le domaine de fréquences des ondes électromagnétiques situé entre un gigahertz (...) et quelques centaines de gigahertz (...)

Spanish

Save record 2

Record 3 1976-06-19

English

Subject field(s)
  • Telecommunications
OBS

2APN59-2. 7.e

French

Domaine(s)
  • Télécommunications
OBS

ibid radar 106cg.31.05.74

Spanish

Save record 3

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