VDO SAA110287EA Manual De Instrucciones página 57

Satellite Antennas User Manual ver. 2.0
Appendix A
How to Set up the Skew Angle
(Only for manual Skew models: Ocean Line 132/337 and
Free Way 1S/1M)
Signals transmitted in vertical and horizontal wave offset exactly
90º from each other. Since linear satellite signals are oriented in a
precise cross pattern, the Ocean Line antennas' receiving element,
called an LNB (low-noise block) must be oriented in the same way
to optimize reception. This orientation adjustment is referred to as
the LNB "skew angle." The correct skew setting varies depending
on your geographic location, since the orientation of your antenna
to the satellite changes as you move. This appendix provides how
to set up the skew angle.