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Sky Digital BSkyB, Freesat & Saorsat support forum
Sky & Freesat fringe reception
Link equation
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<blockquote data-quote="geoffrey" data-source="post: 385221" data-attributes="member: 194666"><p>Someone may be interested in my progress with these calculations:</p><p>According to <a href="http://www.satellite-calculations.com/" target="_blank">http://www.satellite-calculations.com/</a> I think that the measurements I have given for C/N are really C+N/N and need to be corrected. This means that my measurement for the ChannelMaster 1.2m C/N is actually 2.75dB and the DH 3.6m C/N 8.42dB. The efficiency of the ChannelMaster dish is probably 66% and the DH prime focus 44% (unless anyone knows better). The antenna noise for the ChanelMaster is 34K and the DH 28K for similar true elevations. Using these numbers in the SMW calculator at <a href="http://www.smw.se" target="_blank">www.smw.se</a> it seems that the DH dish should be giving me a 10.6 C/N and is therefore behaving as if its a 3.0m dish when it gives me 8.42dB.</p></blockquote><p></p>
[QUOTE="geoffrey, post: 385221, member: 194666"] Someone may be interested in my progress with these calculations: According to [URL]http://www.satellite-calculations.com/[/URL] I think that the measurements I have given for C/N are really C+N/N and need to be corrected. This means that my measurement for the ChannelMaster 1.2m C/N is actually 2.75dB and the DH 3.6m C/N 8.42dB. The efficiency of the ChannelMaster dish is probably 66% and the DH prime focus 44% (unless anyone knows better). The antenna noise for the ChanelMaster is 34K and the DH 28K for similar true elevations. Using these numbers in the SMW calculator at [URL="http://www.smw.se"]www.smw.se[/URL] it seems that the DH dish should be giving me a 10.6 C/N and is therefore behaving as if its a 3.0m dish when it gives me 8.42dB. [/QUOTE]
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Sky Digital BSkyB, Freesat & Saorsat support forum
Sky & Freesat fringe reception
Link equation
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