Very high frequency

Get Babylon's Translation Software! Free Download Now!
Babylon 8 - Your all-in-one solution
Award winning translation software trusted by millions. Translate from any language to any language.
View Demo


Wikipedia English The Free EncyclopediaDownload this dictionary
Very high frequency
Very high frequency (VHF) is the radio frequency range from 30 MHz to 300 MHz. It is also known as the meter band or meter wave as the wavelengths range from ten to one meters. Frequencies immediately below VHF are denoted HF, and the next higher frequencies are known as Ultra high frequency (UHF).Common uses for VHF are FM radio broadcast at 88–108 MHz and  television broadcast (together with UHF). VHF is also commonly used for terrestrial navigation systems (VOR in particular), marine communications, and aircraft communications.VHF frequencies' propagation characteristics are ideal for short-distance terrestrial communication, with a range generally somewhat farther than line-of-sight from the transmitter (see formula below). Unlike high frequencies (HF), the ionosphere does not usually reflect VHF radio and thus transmissions are restricted to the local area (and don't interfere with transmissions thousands of kilometres away). VHF is also less affected by atmospheric noise and interference from electrical equipment than low frequencies. Whilst it is more easily blocked by land features than HF and lower frequencies, it is less bothered by buildings and other less substantial objects than higher frequencies.
See more at Wikipedia.org...

This article uses material from Wikipedia® and is licensed under the GNU Free Documentation License

Wikipédia FrançaisDownload this dictionary
Bandes de fréquences de la télévision terrestre
Les Bandes de fréquences de la télévision terrestre sont situées dans la bande de radiofréquences comprise entre 30 et 3000 MHz (longueur d'onde de 10 à 0,1 m), regroupant les très hautes fréquences (VHF) et ultra hautes fréquences (UHF).
Pour la suite, voir Wikipédia.org…
 
Très haute fréquence
La bande des très haute fréquence (very high frequency/VHF) est la partie du spectre radioélectrique s'étendant de 30 MHz à 300 MHz, soit de 1 à 10 m de longueur d'onde.
Pour la suite, voir Wikipédia.org…

© Cet article se sert du contenu de Wikipédia® et est autorisé sous les termes de la Licence de Documentation libre GNU

Wikipedia Deutsch Die freie EnzyklopädieDownload this dictionary
Ultrakurzwelle
Als Ultrakurzwellen (UKW) bezeichnet man elektromagnetische Wellen in einem Frequenzbereich von 30 MHz bis 300 MHz, entsprechend Wellenlängen zwischen 10 und 1 Meter. Sie liegen somit zwischen den Kurzwellen (länger) und den Dezimeterwellen (kürzer). Im englischen Sprachraum wird für Ultrakurzwelle der Begriff VHF (very high frequency - sehr hohe Frequenz) verwendet.
Mehr unter Wikipedia.org...

Dieser Eintrag beinhaltet Material aus Wikipedia® und ist lizensiert auf GNU-Lizenz für freie Dokumentation

Polska Wikipedia – Darmowa encyklopediaDownload this dictionary
Filtr Kalmana
Filtr Kalmana to algorytm rekurencyjnego wyznaczania minimalno-wariancyjnej estymaty wektora stanu modelu liniowego dyskretnego układu dynamicznego na podstawie pomiarów wyjścia tego układu. Przyjmuje się założenie, że zarówno pomiar, jak i proces przetwarzania wewnątrz układu jest obarczony błędem o rozkładzie gaussowskim.
W celu uzyskania więcej informacji, zobacz w Wikipedia.οrg...
 
UKF
UKF to zakres fal radiowych (pasmo radiowe) o częstotliwości od 30 do 300 MHz, co odpowiada długości fali od 10 do 1 metra.Ten zakres fal przeciętnemu człowiekowi kojarzy się najbardziej (przez co potocznie bywa błędnie utożsamiany na wyłączność) z radiofonią UKF.
W celu uzyskania więcej informacji, zobacz w Wikipedia.οrg...

© W niniejszym artykule wykorzystano materialy pochodzace z Wikipedia® i posiada on Powszechna Licencje Publiczna GNU
Wikipedia Italiano L'enciclopedia liberaDownload this dictionary
Very high frequency
VHF è l'acronimo di Very High Frequency e sta ad indicare la parte dello spettro delle onde radio compresa tra 30 e 300 MHzQuesta banda è utilizzata per la maggior parte delle comunicazioni aeronautiche civili, navali, delle forze di polizia e per la trasmissione di alcuni canali televisivi. Le frequenze da 144 a 146 MHz sono riservate all'attività di radioamatore. La banda compresa tra gli 88 e i 108 MHz è utilizzata per la trasmissione radiofonica in FM, mentre segnali complessi contenenti tutte le frequenze di questa banda vengono impiegati per la magnetoterapia ad alta frequenza.
Per saperne di più visita Wikipedia.org...

Questo articolo utilizza materiale tratto da Wikipedia® ed è autorizzato sotto la licenza GNU Free Documentation License

Define Very high frequency

Translate Very high frequency





Very high frequency in Chinese | | Very high frequency in English | Very high frequency in French | Very high frequency in Italian | Very high frequency in Spanish | Very high frequency in Dutch | Very high frequency in Portuguese | Very high frequency in German | Very high frequency in Russian | Very high frequency in Japanese | Very high frequency in Greek | Very high frequency in Korean | Very high frequency in Turkish | Very high frequency in Hebrew | Very high frequency in Arabic | Very high frequency in Thai | Very high frequency in Polish | Very high frequency in Croatian | Very high frequency in Albanian | Very high frequency in Urdu | Very high frequency in Danish | Very high frequency in Swedish | Very high frequency in Ukrainian | Very high frequency in Farsi