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DISH SETUP: Single sat, Multi-Sat & Motorised
1.2 Precision / Octagon lnbf mod
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<blockquote data-quote="John" data-source="post: 980807" data-attributes="member: 175005"><p>... did a quick simple evaluation on Ka between the XMW DRO Ka D lnb and the Inverto Ka/Ku D lnbf using the Gib 1.25. You can't see it on the pic, but the Inverto has had it's nose cut off to try different feeds.</p><p>Tried an oval Hughes feed, worked slightly better when the oval was horizontal than vertical. Tried a Soarsat feed, and eventually back to the original Inverto feed. Result: The standard XMW + cone feed was a good 1/2 dB down compared to the Inverto. The original Inverto feed was a good 1/2dB up on the others. So on my 1.25Gib on Ka, the original untouched Inverto was the better choice it would seem but these small C/N db differences would mean diddly squat if a more comprehensive / rigorous test were to be done on the lnb's to reveal the ability to resolve a difficult signal..... some thing for another day ?.</p><p>Did a quick skew / Xpol test on the Octagon pll Ku on the 1.25 Gibby and found it to be very critical on the skew setting position .... very easy to get an opposite polarity signal show up on the analyser.... some thing to be aware of ?.</p></blockquote><p></p>
[QUOTE="John, post: 980807, member: 175005"] ... did a quick simple evaluation on Ka between the XMW DRO Ka D lnb and the Inverto Ka/Ku D lnbf using the Gib 1.25. You can't see it on the pic, but the Inverto has had it's nose cut off to try different feeds. Tried an oval Hughes feed, worked slightly better when the oval was horizontal than vertical. Tried a Soarsat feed, and eventually back to the original Inverto feed. Result: The standard XMW + cone feed was a good 1/2 dB down compared to the Inverto. The original Inverto feed was a good 1/2dB up on the others. So on my 1.25Gib on Ka, the original untouched Inverto was the better choice it would seem but these small C/N db differences would mean diddly squat if a more comprehensive / rigorous test were to be done on the lnb's to reveal the ability to resolve a difficult signal..... some thing for another day ?. Did a quick skew / Xpol test on the Octagon pll Ku on the 1.25 Gibby and found it to be very critical on the skew setting position .... very easy to get an opposite polarity signal show up on the analyser.... some thing to be aware of ?. [/QUOTE]
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Satellite TV receivers & systems support forums
DISH SETUP: Single sat, Multi-Sat & Motorised
1.2 Precision / Octagon lnbf mod
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