Kostya,<br />It actually tilts the arm from vertical at B3 to virtually horizontal at NSS6. So as you see it moves the LNB to the exact degree.<br /><br />BTW, If you can imagine the sats lined up on Clarks belt, imagine that every sat is normal (at 90 deg) to the ground directly bellow it. Therefore the LNB tilts to follow the apparent tilt of the sat from where we are standing.<br /><br />In Perth, people have their LNB to NSS6 almost like we in Sydney have to OPTUS B3. <img border="0" title="" alt="[Wink]" src="images/icons/default/wink.gif" />