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RELACIÓN EB/NO
La relación EB/NO es la medida de la relación señal/ruido de la señal digital. Este valor no es idéntico al
valor C/N conocido de la técnica de recepción analógica. Por regla general, en caso de valores de EB/NO
inferiores a 5 dB no es posible ya la recepción.
TASA DE SÍMBOLOS
La tasa de símbolos describe la cantidad de datos transmitidos por segundo. La tasa de símbolos se mide
en MSímbolos/s y es igual a la cantidad de símbolos que entran por segundo.
TRANSPONDER
Un transponder es un convertidor de frecuencia que recibe las señales de TV y radio emitidas desde
la Tierra, las convierte y a continuación las transmite de nuevo a la Tierra con la frecuencia modi cada.
Un satélite posee varios transponder.
Los transponder analógicos transmiten un solo canal de TV y eventualmente varios canales de radio en una
frecuencia de emisión.
Los transponders digitales transmiten al mismo tiempo varios canales de TV y varios de radio en una
frecuencia de emisión. Si un proveedor de canales emite varios canales de TV a través de un transponder
digital, se habla también del paquete de canales de dicho proveedor. Los términos «Transponder digital»
y «Paquete de canales» tienen el mismo signi cado.
TASA DE BITS DE VÍDEO
La tasa de bits de vídeo describe la cantidad de datos de la señal de vídeo digitalizada transmitidos por
segundo.
TASA DE VITERBI
La tasa de Viterbi (tasa de códigos, tasa de errores) caracteriza la protección contra errores utilizada por el
proveedor de canales. El estándar DVB prevé los siguientes valores: 1/2 - 2/3 - 3/4 - 5/6 - 7/8
PEQUEÑO GLOSARIO TÉCNICO
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