VLF→LF→MF→HF→VHF→UHF→SHF→EHF : même ordre que l’alphabet, fréquence qui monte.
1. Quelle est la plage de fréquences de la bande VLF ?
2. Dans quel ordre croissant de fréquence les bandes radio sont-elles classées ?
3. Quel service primaire correspond à des communications et à la navigation aérienne ?
VLF — définition ?
Bande radio de 3 à 30 kHz.
LF — plage ?
30 kHz à 300 kHz.
MF — plage ?
300 kHz à 3 MHz.
HF — plage ?
3 à 30 MHz.
VHF — plage ?
30 à 300 MHz.
UHF — plage ?
300 MHz à 3 GHz.
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