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Satellite TV receivers & systems support forums
DISH SETUP: Single sat, Multi-Sat & Motorised
My Channel Master 1.8 project.
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<blockquote data-quote="moonbase" data-source="post: 1128366" data-attributes="member: 178786"><p>As indicated by CH above, those numbers are scalar ring positions for various F/D dishes.</p><p>The position of the scalar ring along the LNBF barrel and the distance of the LNBF throat from the dish can impact on signal levels in C-Band.</p><p></p><p>'ere, cop for this picture, it presents my findings on the impact of changing the feed distance from the dish in conjunction with movement of the scalar along the feed barrel.</p><p>The test was carried out on 43.1 West using a prime focus dish with a flat scalar on the feed. The same logic might apply to an offset focus dish with hooded scalar.</p><p></p><p>The values of 745, 750 and 755 are the distances of the feed opening to the centre of the dish in millimetres.</p><p>The values of 0 to 40 are the distances in millimetres of the scalar ring along the feed barrel, 0 being flush with the open end of the feed.</p><p></p><p>43.1 West is a good test for dish and LNB alignment in C-Band. It is not an easy catch for a UK location and needs things to be reasonably well aligned.</p><p></p><p>.</p><p>[ATTACH=full]141784[/ATTACH]</p></blockquote><p></p>
[QUOTE="moonbase, post: 1128366, member: 178786"] As indicated by CH above, those numbers are scalar ring positions for various F/D dishes. The position of the scalar ring along the LNBF barrel and the distance of the LNBF throat from the dish can impact on signal levels in C-Band. 'ere, cop for this picture, it presents my findings on the impact of changing the feed distance from the dish in conjunction with movement of the scalar along the feed barrel. The test was carried out on 43.1 West using a prime focus dish with a flat scalar on the feed. The same logic might apply to an offset focus dish with hooded scalar. The values of 745, 750 and 755 are the distances of the feed opening to the centre of the dish in millimetres. The values of 0 to 40 are the distances in millimetres of the scalar ring along the feed barrel, 0 being flush with the open end of the feed. 43.1 West is a good test for dish and LNB alignment in C-Band. It is not an easy catch for a UK location and needs things to be reasonably well aligned. . [ATTACH type="full" alt="Feed-Scalar Pairs for 43.1W.jpg"]141784[/ATTACH] [/QUOTE]
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Satellite TV receivers & systems support forums
DISH SETUP: Single sat, Multi-Sat & Motorised
My Channel Master 1.8 project.
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