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C Band Right and Left
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<blockquote data-quote="Spiff" data-source="post: 1013445" data-attributes="member: 404998"><p>Good evening from Mullion Cove Cornwall.</p><p></p><p>Having constructed a motor drive to rotate the polarizing plate in my C band LNB, I am now not certain of its use apart from peaking the signal.</p><p></p><p>On a C band LNB there are two slots, if I insert the plate so that right hand polarisation signals are converted to vertical, will it then automatically convert left hand signals to horizontal ?</p><p></p><p>Or is it necessary to take the plate out and put it back in the other slots ?</p><p></p><p>I should have thought about this more before making the motor drive up : )</p><p></p><p>No amount of searching online appears to spell out the answer to this question for me.</p><p></p><p>Perhaps because I am the only one who does not realise the answer : )</p><p></p><p>The motor arrived from China quite quickly and works fine, it should perhaps be obvious having used it as to the answer to my question, but it is not.</p><p></p><p>I find that a station that had been saved as both V & H where I had previously been trying blind scans with the plate in both fixed positions, requires me to drive the motor driven plate to both positions.</p><p></p><p>This I think is because it has been scanned and saved that way.</p><p></p><p>It has been very interesting constructing the drive, even if not to much purpose : )</p><p></p><p>God Bless Spiff</p></blockquote><p></p>
[QUOTE="Spiff, post: 1013445, member: 404998"] Good evening from Mullion Cove Cornwall. Having constructed a motor drive to rotate the polarizing plate in my C band LNB, I am now not certain of its use apart from peaking the signal. On a C band LNB there are two slots, if I insert the plate so that right hand polarisation signals are converted to vertical, will it then automatically convert left hand signals to horizontal ? Or is it necessary to take the plate out and put it back in the other slots ? I should have thought about this more before making the motor drive up : ) No amount of searching online appears to spell out the answer to this question for me. Perhaps because I am the only one who does not realise the answer : ) The motor arrived from China quite quickly and works fine, it should perhaps be obvious having used it as to the answer to my question, but it is not. I find that a station that had been saved as both V & H where I had previously been trying blind scans with the plate in both fixed positions, requires me to drive the motor driven plate to both positions. This I think is because it has been scanned and saved that way. It has been very interesting constructing the drive, even if not to much purpose : ) God Bless Spiff [/QUOTE]
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