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Message: <blockquote data-quote="Channel Hopper" data-source="post: 1085058" data-attributes="member: 175144">Eh?If the post is dead vertical, then the alignment is based on the locking of longitude and latitude of the gearbox alone. The declination angle (elevation adjust of the fixed dish) brings the focal point into alignment with the equatorial line at which the geostationary satellites rest. The latter does not need to be known if the DiSEqC function is working and one satellite on the arc is peaked, though the tolerance of the gears, distortion of the dish and boom arm, plus the cheese that some posts and clamps are made of will impact on the final fettling.</blockquote>