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Sky Digital BSkyB, Freesat & Saorsat support forum
Sky & Freesat fringe reception
LNB comparison tests
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<blockquote data-quote="canofan" data-source="post: 529751" data-attributes="member: 259756"><p>I am using a 611-6060-10 feed assembly for the 11.7 to 12.2 ghz band with a Norsat 7706A and it is miracles above what I was using before.</p><p>However the feedhorn (CM3040645) has a WC75 throat and I had to use the included WC75 to WR75 transition to make it work OK.</p><p>I cannot help thinking that, if I had a WR75 feedhorn (CM3040605), I could remove the transition, and its insertion loss, to achieve even better performance.</p><p>I estimate the transition to introduce 8° to 15°K to system noise. Am I correct?</p><p>The difficult thing is that, when you order the longer single polarity feedhorn, you are not sure what you receive: will it be the WC75 plus transition or the WR75 version?</p><p>Sales Engineers accept orders by Feed assembly numbers and not by feedhorn numbers.</p><p>I also need a WC75 corrugated CM feedhorn to use with C120 universal LNBs and I do not want to receive the WR75 instead.</p><p>Could you help?</p></blockquote><p></p>
[QUOTE="canofan, post: 529751, member: 259756"] I am using a 611-6060-10 feed assembly for the 11.7 to 12.2 ghz band with a Norsat 7706A and it is miracles above what I was using before. However the feedhorn (CM3040645) has a WC75 throat and I had to use the included WC75 to WR75 transition to make it work OK. I cannot help thinking that, if I had a WR75 feedhorn (CM3040605), I could remove the transition, and its insertion loss, to achieve even better performance. I estimate the transition to introduce 8° to 15°K to system noise. Am I correct? The difficult thing is that, when you order the longer single polarity feedhorn, you are not sure what you receive: will it be the WC75 plus transition or the WR75 version? Sales Engineers accept orders by Feed assembly numbers and not by feedhorn numbers. I also need a WC75 corrugated CM feedhorn to use with C120 universal LNBs and I do not want to receive the WR75 instead. Could you help? [/QUOTE]
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Sky Digital BSkyB, Freesat & Saorsat support forum
Sky & Freesat fringe reception
LNB comparison tests
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