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<blockquote data-quote="Vipersan" data-source="post: 753353" data-attributes="member: 325666">Thanks for your thoughts Paul ..Certainly its a complex subect ..Just as an aside ...I've been concentrating on getting the lnb dead centre as the setup currently stands ...During the process I have been trying to work out how much out of focus my 6 petal dish currently is ..Looking for deaf petals etc ..To this end I cut a triangular sheet of polystyrene roughly the shape of 1 petal ..Monitored the signal on Petagon channel ..approx 6.4 db currently ..I then went oround the dish covering each petal in turn ..and recording the drop in signal ..the drop varied between petal coverings ...but never more than 0.3db on any of the six petals covered ..I'm a little confused ??Does this mean the dish is fairly accurately focused ...?Or does it mean the dish is evenly deaf ?I thought I'd get bigger drops ..perhaps 0.5 &gt; 1db for each petal ..but it looks like its behaving like an optical lense ..IE ..for a dirt spot on a camera lense ...the overall brightness diminishes ...but not by much ..and the image effectively doesn't see the dirt spot ..and appears to create an illusion of being able to see through the dirt spot as though its not there..Any thoughts ..anyone ?rgdsVS</blockquote>

[QUOTE="Vipersan, post: 753353, member: 325666"] Thanks for your thoughts Paul .. Certainly its a complex subect .. Just as an aside ...I've been concentrating on getting the lnb dead centre as the setup currently stands ... During the process I have been trying to work out how much out of focus my 6 petal dish currently is .. Looking for deaf petals etc .. To this end I cut a triangular sheet of polystyrene roughly the shape of 1 petal .. Monitored the signal on Petagon channel ..approx 6.4 db currently .. I then went oround the dish covering each petal in turn ..and recording the drop in signal .. the drop varied between petal coverings ...but never more than 0.3db on any of the six petals covered .. I'm a little confused ?? Does this mean the dish is fairly accurately focused ...? Or does it mean the dish is evenly deaf ? I thought I'd get bigger drops .. perhaps 0.5 > 1db for each petal .. but it looks like its behaving like an optical lense .. IE ..for a dirt spot on a camera lense ...the overall brightness diminishes ...but not by much ..and the image effectively doesn't see the dirt spot ..and appears to create an illusion of being able to see through the dirt spot as though its not there.. Any thoughts .. anyone ? rgds VS [/QUOTE]

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