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Sky Digital BSkyB, Freesat & Saorsat support forum
Sky & Freesat fringe reception
Astra 1N chat - January 2012
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<blockquote data-quote="Satellite74" data-source="post: 795417" data-attributes="member: 379688"><p>just made some more calculations...</p><p></p><p>According to the signal strength map for 2F, SES Astra expect the signal level to go down 2 dBW, from 57 to 55, between Cambridge and the southern North sea about north of Bruges. Which is a distance of about 90 miles. From what I just read somewhere on the web, a minimum of 40 dBW is needed for a 120 cm dish. And it's about another 290 miles from the southern North Sea, north of Bruges, to Hanover. If the signal drop-off would be perfectly linear (which as we know it won't be) and the signal dropped another 2 dBW every additional 90 miles, then that would leave around 48 dBW over central Germany. Again, in an unrealistic scenario, just for the sake of crunching numbers. So the question is again going to be, how "non-linear" will the drop-off turn out. Will it be reduced by more than 15 dBW over those 290 miles, which would be an average rate of 2 dBW every 36 miles instead of every 90...</p><p></p><p>I know... once again just guess-work... <img src="https://www.satellites.co.uk/styles/default/xenforo/smilies/smile.png" class="smilie" loading="lazy" alt=":)" title="Smile :)" data-shortname=":)" /></p></blockquote><p></p>
[QUOTE="Satellite74, post: 795417, member: 379688"] just made some more calculations... According to the signal strength map for 2F, SES Astra expect the signal level to go down 2 dBW, from 57 to 55, between Cambridge and the southern North sea about north of Bruges. Which is a distance of about 90 miles. From what I just read somewhere on the web, a minimum of 40 dBW is needed for a 120 cm dish. And it's about another 290 miles from the southern North Sea, north of Bruges, to Hanover. If the signal drop-off would be perfectly linear (which as we know it won't be) and the signal dropped another 2 dBW every additional 90 miles, then that would leave around 48 dBW over central Germany. Again, in an unrealistic scenario, just for the sake of crunching numbers. So the question is again going to be, how "non-linear" will the drop-off turn out. Will it be reduced by more than 15 dBW over those 290 miles, which would be an average rate of 2 dBW every 36 miles instead of every 90... I know... once again just guess-work... :) [/QUOTE]
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Sky Digital BSkyB, Freesat & Saorsat support forum
Sky & Freesat fringe reception
Astra 1N chat - January 2012
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