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Satellite TV receivers & systems support forums
Satellite Systems - What to Buy - What to install
monoblock LNB.
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<blockquote data-quote="PaulR" data-source="post: 1002247" data-attributes="member: 176256"><p>So many points to reply to.</p><p></p><p>First of all, yes I am misusing the term focal point. That is where the LNB is positioned, not what I was saying. I'm not sure that there is a term for what I mean. Perhaps focusing point? Bit on the dish that the LNB is pointing at? The best position for further LNBs to point at is the same position that the primary, central LNB points at. If a secondary LNB is not also pointing at this primary position then, yes, it can be made to work but it will inevitably reduce the performance a bit.</p><p></p><p>What I am trying to say is that a monoblock doesn't have the facility to point at this primary position for both feedhorns at all sizes of dish. An adjustable monoblock may have the best feedhorn angles for 80cm but it won't have the best angles for any other size dish. As I said already, it's unnoticeable on a smaller 60cm dish as the satellites wanted are stronger. In addition, as the aperture angle is wider on a smaller dish, you can probably even use a non adjustable monoblock and get signals for both wanted satellites.</p><p></p><p>In summary, I'm not saying that an adjustable LNB won't work on a larger dish just that it won't perform at its best and, whereas, it can theoretically pull in comparable signals on its designed-for-size dish compared to a multi LNB setup it won't be the same for a larger dish.</p><p></p><p>I hope that clears it up.</p></blockquote><p></p>
[QUOTE="PaulR, post: 1002247, member: 176256"] So many points to reply to. First of all, yes I am misusing the term focal point. That is where the LNB is positioned, not what I was saying. I'm not sure that there is a term for what I mean. Perhaps focusing point? Bit on the dish that the LNB is pointing at? The best position for further LNBs to point at is the same position that the primary, central LNB points at. If a secondary LNB is not also pointing at this primary position then, yes, it can be made to work but it will inevitably reduce the performance a bit. What I am trying to say is that a monoblock doesn't have the facility to point at this primary position for both feedhorns at all sizes of dish. An adjustable monoblock may have the best feedhorn angles for 80cm but it won't have the best angles for any other size dish. As I said already, it's unnoticeable on a smaller 60cm dish as the satellites wanted are stronger. In addition, as the aperture angle is wider on a smaller dish, you can probably even use a non adjustable monoblock and get signals for both wanted satellites. In summary, I'm not saying that an adjustable LNB won't work on a larger dish just that it won't perform at its best and, whereas, it can theoretically pull in comparable signals on its designed-for-size dish compared to a multi LNB setup it won't be the same for a larger dish. I hope that clears it up. [/QUOTE]
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monoblock LNB.
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