File:Radio beacon of distress on 121,5 MHz.ogg
Radio_beacon_of_distress_on_121,5_MHz.ogg (Ogg Vorbis sound file, length 8.2 s, 23 kbps, file size: 23 KB)
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Summary
| Description |
Français : Émetteur : Modulation de balise radio de détresse sur 121,5 MHz (et sur 243 MHz)
English: Transmitter Modulation of radio beacon of distress on 121,5 MHz (243 MHz) |
| Date | |
| Source | Own work |
| Author | F1jmm |
Descriptions
A radio beacon has a power ranging between 0,02 W and 0,35 W out of 121,500 MHz. The Amplitude modulation emitted on this frequency corresponds to a sweeping of more than 700 Hz between 300 Hz and 1 600 Hz. The emission on frequencies 121,500 MHz, (243,000 MHz military version), requires a radiogoniometric location by the teams of research on the ground.
a radio beacon has a power ranging between 3 W and 7 W on tape 406 to 406,1 digital MHz in transmission coded of the one 440 ms duration MMSI all the 50 s for indication and the répérage by Cospas-Sarsat satelliteUne radiobalise a une puissance comprise entre 20 mW et 350 mW sur 121,500 MHz. La Modulation d'amplitude émise sur cette fréquence correspond à un balayage de plus de 700 Hz entre 300 Hz et 1 600 Hz. L'émission sur les fréquences 121,500 MHz, (243,000 MHz version militaire), nécessite un repérage radiogoniométrique par les équipes de recherche au sol.
Une radiobalise a une puissance comprise entre 3 W et 7 W sur la bande 406 à 406,1 MHz en transmission digital codé du MMSI d'une durée de 440 ms tous les 50 s pour la signalisation et le répérage par satellite Cospas-Sarsat
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File history
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 12:59, 7 July 2019 | 8.2 s (23 KB) | Deeday-UK | Length of clip reduced from 1 min to 8 s – more than enough for such a repetitive sound. | |
| 21:46, 22 August 2009 | 1 min 2 s (164 KB) | F1jmm | == {{int:filedesc}} == {{Information |Description= {{fr|Émetteur : Modulation de balise radio de détresse sur 121,5 MHz et sur 243 MHz}} {{en|Transmitter Modulation of radio beacon of distress on 121,5 MHz 243 MHz}} |Source=travail personnel (own work |
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