TERMIUM Plus^®

Record 1,  Textual support,  English

Record number: 1, Textual support number: 1 OBS

In radio transmission, maximum usable frequency(MUF) is the highest radio frequency that can be used for transmission between two points on Earth by reflection from the ionosphere... at a specified time, independent of transmitter power. This index is especially useful for shortwave transmissions.  3, record 1, English, - maximum%20usable%20frequency

Record number: 1, Textual support number: 2 OBS

maximum usable frequency; MUF : designations standardized by NATO.  4, record 1, English, - maximum%20usable%20frequency

Record 1,  Textual support,  French

Record number: 1, Textual support number: 1 OBS

fréquence maximale utilisable : désignation normalisée par l'OTAN.  3, record 1, French, - fr%C3%A9quence%20maximale%20utilisable

Record 1,  Textual support,  Spanish

Record number: 1, Textual support number: 1 DEF

Frecuencia másl alta que puede ser utilizada en un momento determinado para la propagación entre dos puntos específicos mediante reflexión ionosférica.  1, record 1, Spanish, - m%C3%A1xima%20frecuencia%20utilizable

Record 2,  Textual support,  English

Record number: 2, Textual support number: 1 DEF

The lowest frequency effective at a specified time for ionospheric propagation of radio waves between two specified points. (STWG)  3, record 2, English, - lowest%20usable%20frequency

Record 2,  Textual support,  French

Record number: 2, Textual support number: 1 DEF

Fréquence la plus basse permettant, à un instant donné, d'établir une liaison radioélectrique de qualité acceptable entre deux points donnés par l'intermédiaire de l'ionosphère. (GTTT)  2, record 2, French, - fr%C3%A9quence%20minimale%20utilisable

Record number: 2, Textual support number: 1 OBS

fréquence minimale utilisable : terme et définition uniformisés par le Groupe de travail de terminologie des transmissions (GTTT).  2, record 2, French, - fr%C3%A9quence%20minimale%20utilisable

Record 2,  Textual support,  Spanish

Record number: 2, Textual support number: 1 DEF

Frecuencia más baja entre alrededor de 2 MHz (Mc/s) y alrededor de 30 MHz (Mc/s) que puede ser utilizada para un servicio determinado en un tiempo específico.  1, record 2, Spanish, - frecuencia%20m%C3%ADnima%20utilizable

Record number: 2, Textual support number: 1 OBS

A menudo es la misma que la de la frecuencia límite de absorción para la capa F2. Una excepción es cuando la posterior es menor que la de la frecuencia de corte de una capa inferior. LUF es la abreviatura del término inglés "lowest usable frequency".  1, record 2, Spanish, - frecuencia%20m%C3%ADnima%20utilizable

Record 3,  Textual support,  English

Record number: 3, Textual support number: 1 CONT

Since the ionosphere lying over the great circle determines the mode of propagation, a method for determining the MUF over that path suggests itself: we must first determine the critical frequency at the midpoint of the path at a particular layer height. Knowing the path length will enable us to determine what the MUF factor will be.  3, record 3, English, - maximum%20usable%20frequency%20factor

Record 3,  Textual support,  French

Record 3,  Textual support,  Spanish

Record number: 3, Textual support number: 1 DEF

Relación entre la frecuencia máxima utilizable y la frecuencia crítica en el punto medio del salto.  1, record 3, Spanish, - factor%20de%20m%C3%A1xima%20frecuencia%20utilizable

Record number: 3, Textual support number: 1 OBS

símbolo: Md; en una transmisión de simple salto.  1, record 3, Spanish, - factor%20de%20m%C3%A1xima%20frecuencia%20utilizable

Record 4,  Textual support,  English

Record number: 4, Textual support number: 1 DEF

In radio transmission, the lowest frequency effective at a specified time for ionospheric propagation of radio waves between any two points, excluding frequencies below several megahertz.  4, record 4, English, - lowest%20useful%20high%20frequency

Record number: 4, Textual support number: 1 OBS

[The lowest usable high frequency] is determined by such factors as absorption, transmitter power, antenna gain, receiver characteristics, type of service, and noise conditions.  4, record 4, English, - lowest%20useful%20high%20frequency

Record number: 4, Textual support number: 2 OBS

The high frequency band is set between 3 to 30 MHz.  5, record 4, English, - lowest%20useful%20high%20frequency

Record 4,  Textual support,  French

Record 4,  Textual support,  Spanish

Record 5,  Textual support,  English

Record number: 5, Textual support number: 1 DEF

... how low in frequency a loudspeaker or subwoofer can still operate to produce usable output.  1, record 5, English, - bass%20extension

Record number: 5, Textual support number: 1 OBS

A typical bookshelf-sized speaker may manage a bass extension of 80 hertz (... at - 10dB), a good floorstanding speaker may manage 30 or 40 hertz, an inexpensive subwoofer 40 hertz, a middling one 25 to 30 hertz, an expensive one 16 hertz.  1, record 5, English, - bass%20extension

Record 5,  Textual support,  French

Record number: 5, Textual support number: 1 DEF

Mesure des fréquences les plus basses reproduites par un haut-parleur ou un caisson d'extrêmes graves fonctionnant avec une puissance de sortie acceptable.  3, record 5, French, - extension%20des%20basses

Record 5,  Textual support,  Spanish

Record 6,  Textual support,  English

Record number: 6, Textual support number: 1 DEF

In ionospheric propagation over distances sufficiently long that one-hop transmission is precluded by the curvature of the Earth; an empirical method of estimating the maximum usable frequency for transmission between two points by way of a specified ionospheric layer from a knowledge of the properties of the ionosphere at the two control points.  2, record 6, English, - two%2Dcontrol%2Dpoint%20method

Record 6,  Textual support,  French

Record number: 6, Textual support number: 1 DEF

Méthode empirique d'estimation de la fréquence maximale utilisable, dans la transmission entre deux points au moyen d'une couche ionosphérique donnée basée sur les propriétés de l'ionosphère en deux points directeurs; cette méthode est appliquée dans la propagation ionosphérique sur des distances suffisamment grandes pour que la courbure de la Terre exclue la transmission par un seul saut.  2, record 6, French, - m%C3%A9thode%20des%20deux%20points%20directeurs

Record 6,  Textual support,  Spanish

Record number: 6, Textual support number: 1 DEF

Método empírico de estimación de la frecuencia máxima útil, en la transmisión entre dos puntos por medio de una capa ionosférica determinada, basada en las propiedades de la ionosfera en dos puntos de control.  2, record 6, Spanish, - m%C3%A9todo%20de%20los%20dos%20puntos%20de%20control

Record number: 6, Textual support number: 1 OBS

En propagación ionosférica sobre distancias lo suficientemente largas para que la transmisión de un solo salto no pueda ser posible por la curvatura de tierra.  2, record 6, Spanish, - m%C3%A9todo%20de%20los%20dos%20puntos%20de%20control

Record 7,  Textual support,  English

Record number: 7, Textual support number: 1 CONT

These soundings can take many seconds-even minutes depending on the number of available frequencies, and after all of this, the radio switches over to the manual mode if it fails to find a usable frequency.  1, record 7, English, - usable%20frequency

Record 7,  Textual support,  French

Record number: 7, Textual support number: 1 CONT

Ces tests prennent plusieurs secondes (parfois même des minutes si le nombre de canaux à explorer est grand) après quoi le poste se commute sur le mode manuel s'il ne trouve pas de fréquence utilisable.  1, record 7, French, - fr%C3%A9quence%20utilisable

Record 7,  Textual support,  Spanish

Record 8,  Textual support,  English

Record number: 8, Textual support number: 1 CONT

These soundings can take many seconds-even minutes depending on the number of available frequencies, and after all of this, the radio switches over to the manual mode if it fails to find a usable frequency.  1, record 8, English, - switch

Record 8,  Textual support,  French

Record number: 8, Textual support number: 1 CONT

Ces tests prennent plusieurs secondes (parfois même des minutes si le nombre de canaux à explorer est grand) après quoi le poste se commute sur le mode manuel s'il ne trouve pas de fréquence utilisable.  1, record 8, French, - commuter

Record 8,  Textual support,  Spanish

Record 9,  Textual support,  English

Record number: 9, Textual support number: 1 DEF

The highest frequency that permits acceptable operation between given points at a given time, and under specified working conditions.  2, record 9, English, - operational%20MUF

Record number: 9, Textual support number: 1 OBS

MUF : Maximum Usable Frequency.  3, record 9, English, - operational%20MUF

Record 9,  Textual support,  French

Record number: 9, Textual support number: 1 DEF

La fréquence la plus élevée qui permet, à un moment donné, d'assurer un service de qualité acceptable entre des points donnés, dans des conditions d'exploitation spécifiées.  2, record 9, French, - MUF%20d%27exploitation

Record number: 9, Textual support number: 1 OBS

Le terme MUF est le sigle de l'expression anglaise «Maximum Usable Frequency».  3, record 9, French, - MUF%20d%27exploitation

Record 9,  Textual support,  Spanish