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Satellite TV receivers & systems support forums
DISH SETUP: Single sat, Multi-Sat & Motorised
Dish Gain & Surface Area ?
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<blockquote data-quote="moonbase" data-source="post: 757042" data-attributes="member: 178786"><p>Hi,</p><p></p><p>Would anybody please be able to clear up some confusion I have in the relationship between the gain of a dish and the active surface area.</p><p></p><p>I have a 1.5m dish and a 1.8m dish, both prime focus and the same make. The manufacturers figures for mid gain are 43.1db (1.5m) and 44.7db (1.8m) but the surface area of the 1.8m dish is considerably more so I would possibly have expected a higher mid gain figure.</p><p></p><p></p><p>On the subject of surface areas, would anyone please be able to provide the mathematical formula to calculate the surface area for a prime focus dish, I assume it is some type of derivative of the area of a circle but with a factor to allow for the curvature (got no pi on my keyboard).</p><p></p><p></p><p>Thx for any insight on the subject.</p><p></p><p></p><p></p><p>Rgds</p></blockquote><p></p>
[QUOTE="moonbase, post: 757042, member: 178786"] Hi, Would anybody please be able to clear up some confusion I have in the relationship between the gain of a dish and the active surface area. I have a 1.5m dish and a 1.8m dish, both prime focus and the same make. The manufacturers figures for mid gain are 43.1db (1.5m) and 44.7db (1.8m) but the surface area of the 1.8m dish is considerably more so I would possibly have expected a higher mid gain figure. On the subject of surface areas, would anyone please be able to provide the mathematical formula to calculate the surface area for a prime focus dish, I assume it is some type of derivative of the area of a circle but with a factor to allow for the curvature (got no pi on my keyboard). Thx for any insight on the subject. Rgds [/QUOTE]
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Satellite TV receivers & systems support forums
DISH SETUP: Single sat, Multi-Sat & Motorised
Dish Gain & Surface Area ?
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