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Satellite TV receivers & systems support forums
DISH SETUP: Single sat, Multi-Sat & Motorised
Offset dishes
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<blockquote data-quote="PaulR" data-source="post: 830168" data-attributes="member: 176256"><p>I'm not sure why improved sidelobe performance should be thought necessary for dishes no smaller than 60cm as they have enough directivity for satellite seperations of 3 degrees or more. It's even debatable for 2.5 degree of separation I would have thought. It's only when you get down to $ly minidish sizes that you need to think about extra sidelobe rejection; hence the squashed shape and special LNB horn to match.</p><p></p><p>In fact if improved sidelobe performance was supposedly a reason, why is there not an LNB horn designed to match? I suspect that the shape is simply a design statement. And we all know about style over substance.</p><p></p><p>There's nothing in either link about the shape of the dish either.</p></blockquote><p></p>
[QUOTE="PaulR, post: 830168, member: 176256"] I'm not sure why improved sidelobe performance should be thought necessary for dishes no smaller than 60cm as they have enough directivity for satellite seperations of 3 degrees or more. It's even debatable for 2.5 degree of separation I would have thought. It's only when you get down to $ly minidish sizes that you need to think about extra sidelobe rejection; hence the squashed shape and special LNB horn to match. In fact if improved sidelobe performance was supposedly a reason, why is there not an LNB horn designed to match? I suspect that the shape is simply a design statement. And we all know about style over substance. There's nothing in either link about the shape of the dish either. [/QUOTE]
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Satellite TV receivers & systems support forums
DISH SETUP: Single sat, Multi-Sat & Motorised
Offset dishes
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