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problema de señal en antena toroidal

piltrafilla12

Usuario
Amigo OpenSPA
22 Mar 2007
26
0
0
Tengo una antena toroidal para cuatro satélites: astra 19e, hotbird 13, eutelsat w3 7e e intelsat 1w. Tengo el problema de que cuando está nublado o llueve muchos canales se dejan de ver o se ven mal, sobretodo de intelsat y algunos de astra alemanes. A ver si alguien me sabe decir porque ocurre esto o como lo puedo arreglar. Muchas gracias. Ah! mi deco es un mirage sft4000e
 

asterix1702

Usuario
Amigo OpenSPA
20 Jun 2008
42
0
0
35
da lo mismo el deco el no tiene la culpa

a falta de saber como la has orientado si ha ojimetro o con medidor y con alguien profesional o con mucha experiencia...

te comento son muy justas ese tipo de antenas dado que al ser elipticas pierden en anchura y por lo tento es muy dificil sacar el maximo rendimiento de ellas en sat cuyo PIRE ( potencia del haz de cobertura) es algo debil para nuestro territorio...como lo es el sat que indicas.

si la ha ajustado un profesional con medidor y aun asi tienes problemas te recomendaria 2 opcciones o bien que compruebes el factor de ruido de los lnb y si son de mas de 0,3db los cambies por buenos de 0,2 ojo y digo buenos por que la mitad que indican dicho factor es mentira...los illusion o sharp son buenos....

o bien que cambies dicho plato por uno con motor y hay se acabaron los problemas en cualquier sat que te coga en su radio de cobertura...



un saludo
 

piltrafilla12

Usuario
Amigo OpenSPA
22 Mar 2007
26
0
0
Ok, muchas gracias. Pues me la instaló un profesional con medidor. En cuanto a lo del LNB que me dices ya se lo preguntaré a ver que me dice porque no tengo ni idea. Muchas gracias por tu ayuda
 

asterix1702

Usuario
Amigo OpenSPA
20 Jun 2008
42
0
0
35
lo puedes ver tu mismo en los lnb siempre que los tengas en un lugar accesible

en el te pondra a parte de la marca y modelo una medida mas o menos asi

imput= 10,7--12,75Ghz es la entrada ni caso...

ouput= 950--2150Mhz es la salida al deco ni caso...

L.O. = 9,75/10,6Ghz es el oscilador local ni caso...

N.S. o Noise Figure: esto es la figura de ruido cuanto mas alta peor o sea si te indica un valor de 0,5db es una castaña de lnb si te indica 0,3db es mas o menos normalillo si te indica 0,2db pues como te comento en el otro post puede que sea bueno o regularcillo....si te indica 0,1db amigo tienes un formula 1 en tu tejado cosa que no creo....

el estado general del plastico que lo envuelve y lo " tostao" que pueda estar del sol influyen tambien....



un saludo
 

bcde040

No presentado al foro
26 Oct 2008
0
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44
The smile

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