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Sky Digital BSkyB, Freesat & Saorsat support forum
Saorsat - Saorview
9e ka-sat
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<blockquote data-quote="Archived-1" data-source="post: 883646" data-attributes="member: 254181"><p>Looking more into this, there are many factors why its not receivable, its made my head spin but I think I understand it,</p><p>[ATTACH]64535[/ATTACH]</p><p>The Magenta rings are contours of spot signal power.</p><p>The coloured spots are official main service areas</p><p>Spots of same colour use the same mix of frequency and Polarisation</p><p>The first white ring indicate contour of what a published service area might include with a still “normal” size dish (80cm to 110cm) The outer white ring is low signal needing very large dish (1.2m to 2.5m) as it overlaps same settings of Frenc Calais spot. It must be low enough to cause no interference. The spots come from the SAME satellite, so along a line at tangent (purple line) to the two lime circles gets equal signal from both feeds (spots) no matter how big the dish is. Because it’s the same satellite. In fact of the four dishes on the satellite, it’s two separate offset feeds on the same dish. You can only separate the signals enough, reliably, by moving within the Irish or French Blue circles (with Lime fill) along the line between their centres. If the symbol rates, power and drop off of signal from France is enough that Co.Down coast to Ballycastle in Co. Antrim gets only just low enough interference to work on Irish Spot, then the red line marks the edge of possible Irish reception, but only if the French Spot has a similar carrier. As the symbol rate is lowered and frequency shifted, then the Red and Purple lines move toward the French spot. Conclusion is that if there is no interfering French signal a large dish might work as far as UK Midlands. If there is a French Calais signal overlapping the Saorsat carriers, then no matter what size dish, the coverage is limited to the Welsh coast.</p><p>So the coloured spots on the Ka-Sat maps don’t represent footprints, but service areas. A foot print (signal coverage) has contours of signal strength.</p><p>This information is from a longer article on techtir.ie</p><p>read more.</p><p><a href="http://www.saortv.info/satellite-saorsat/saorsat-reception/" target="_blank">http://www.saortv.info/satellite-saorsat/saorsat-reception/</a></p><p></p><p><a href="http://www.techtir.ie/saortv/saorsat-coverage" target="_blank">http://www.techtir.ie/saortv/saorsat-coverage</a></p><p>[ATTACH]64536[/ATTACH]</p></blockquote><p></p>
[QUOTE="Archived-1, post: 883646, member: 254181"] Looking more into this, there are many factors why its not receivable, its made my head spin but I think I understand it, [ATTACH]64535[/ATTACH] The Magenta rings are contours of spot signal power. The coloured spots are official main service areas Spots of same colour use the same mix of frequency and Polarisation The first white ring indicate contour of what a published service area might include with a still “normal” size dish (80cm to 110cm) The outer white ring is low signal needing very large dish (1.2m to 2.5m) as it overlaps same settings of Frenc Calais spot. It must be low enough to cause no interference. The spots come from the SAME satellite, so along a line at tangent (purple line) to the two lime circles gets equal signal from both feeds (spots) no matter how big the dish is. Because it’s the same satellite. In fact of the four dishes on the satellite, it’s two separate offset feeds on the same dish. You can only separate the signals enough, reliably, by moving within the Irish or French Blue circles (with Lime fill) along the line between their centres. If the symbol rates, power and drop off of signal from France is enough that Co.Down coast to Ballycastle in Co. Antrim gets only just low enough interference to work on Irish Spot, then the red line marks the edge of possible Irish reception, but only if the French Spot has a similar carrier. As the symbol rate is lowered and frequency shifted, then the Red and Purple lines move toward the French spot. Conclusion is that if there is no interfering French signal a large dish might work as far as UK Midlands. If there is a French Calais signal overlapping the Saorsat carriers, then no matter what size dish, the coverage is limited to the Welsh coast. So the coloured spots on the Ka-Sat maps don’t represent footprints, but service areas. A foot print (signal coverage) has contours of signal strength. This information is from a longer article on techtir.ie read more. [url]http://www.saortv.info/satellite-saorsat/saorsat-reception/[/url] [url]http://www.techtir.ie/saortv/saorsat-coverage[/url] [ATTACH]64536[/ATTACH] [/QUOTE]
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Sky Digital BSkyB, Freesat & Saorsat support forum
Saorsat - Saorview
9e ka-sat
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