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Satellite TV receivers & systems support forums
DISH SETUP: Single sat, Multi-Sat & Motorised
LNB Skew settings
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<blockquote data-quote="stocksie" data-source="post: 498053" data-attributes="member: 194047"><p>In a steerable dish set up the LNB is set square to the dish thus upright</p><p>with the dish at zero (North where you are) As the dish is moved east or west the LNB</p><p>naturally leans one way or the other thus providing automatic skew to compensate for the longitude difference between receiving site and satellite.</p><p>Your system servo controlled aerial should move 90 degrees only when you</p><p>select H or V. If you imagine a fixed aerial LNB at the front of your steerable</p><p>dish (as nearly all systems are now) then imagine the position required for</p><p>the tiny aerial in your system. Early days some satellites did radiate signals</p><p>not square with the earths equator and receivers did allow for some small</p><p>differences in H and V polarity( plus or minus 10 or so degrees)</p><p>The Skew offset figures you have are for use in installing fixed dishes.</p><p>The little servo motors and drive system were very prone to water/weather</p><p>damage and produced some strange results! Maybe you have a problem there! Easy to check with sight of the aerial.</p></blockquote><p></p>
[QUOTE="stocksie, post: 498053, member: 194047"] In a steerable dish set up the LNB is set square to the dish thus upright with the dish at zero (North where you are) As the dish is moved east or west the LNB naturally leans one way or the other thus providing automatic skew to compensate for the longitude difference between receiving site and satellite. Your system servo controlled aerial should move 90 degrees only when you select H or V. If you imagine a fixed aerial LNB at the front of your steerable dish (as nearly all systems are now) then imagine the position required for the tiny aerial in your system. Early days some satellites did radiate signals not square with the earths equator and receivers did allow for some small differences in H and V polarity( plus or minus 10 or so degrees) The Skew offset figures you have are for use in installing fixed dishes. The little servo motors and drive system were very prone to water/weather damage and produced some strange results! Maybe you have a problem there! Easy to check with sight of the aerial. [/QUOTE]
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Satellite TV receivers & systems support forums
DISH SETUP: Single sat, Multi-Sat & Motorised
LNB Skew settings
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