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Sky Digital BSkyB, Freesat & Saorsat support forum
Sky & Freesat fringe reception
LNB Skew
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<blockquote data-quote="Happy-Buddah" data-source="post: 94699"><p>Hi dave branson</p><p></p><p>You are correct, this is only true for fixed dishes, as a motorised system takes all this into account.</p><p>A clock face has 60 minutes (time) which is 360* (angle), hence each minute (time) on the clock face is equivalent to 6 degrees (angle).</p><p>Therefore your -17.5 degrees is where the minute hand would be at approx 3 minutes past the 12 o'clock position.This is when looking into the dish from the lnb.</p><p>The negative figure is because your dish looks up at the signal from the satellite and consequently the lnb would be skewed over to be approx 3 minutes (time) before the 12 o'clock position if looking up from the rear of the dish.</p><p>To be honest it is not really worth the trouble in the UK, but for those in marginal reception areas every little helps. The ideal situation would be to cant your dish over at 17.5 degrees as this happens with a motorised system.</p><p>Hope that this has helped.</p><p>H-B</p></blockquote><p></p>
[QUOTE="Happy-Buddah, post: 94699"] Hi dave branson You are correct, this is only true for fixed dishes, as a motorised system takes all this into account. A clock face has 60 minutes (time) which is 360* (angle), hence each minute (time) on the clock face is equivalent to 6 degrees (angle). Therefore your -17.5 degrees is where the minute hand would be at approx 3 minutes past the 12 o'clock position.This is when looking into the dish from the lnb. The negative figure is because your dish looks up at the signal from the satellite and consequently the lnb would be skewed over to be approx 3 minutes (time) before the 12 o'clock position if looking up from the rear of the dish. To be honest it is not really worth the trouble in the UK, but for those in marginal reception areas every little helps. The ideal situation would be to cant your dish over at 17.5 degrees as this happens with a motorised system. Hope that this has helped. H-B [/QUOTE]
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Sky Digital BSkyB, Freesat & Saorsat support forum
Sky & Freesat fringe reception
LNB Skew
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