RC4500 Antenna Controller Chapter 4 Software Configuration / Installation
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4.2.3.3 Polarization Reference Voltage and Offset Angle
This section describes how to approximately align the polarization axis’ displayed angle to a local
horizontal reference. The steps required to accomplish this depends on whether the polarization axis is
equipped with a potentiometer or resolver.
The polarization axis should be positioned so that it is aligned with the local vertical. Local vertical is
considered the 0.0 polarization angle. Clockwise and counterclockwise is defined as seen by a person
looking from behind the antenna out towards the arc of satellites. In MANUAL mode, when the Pol CW
key is pressed the polarization axis must rotate in the clockwise direction as shown in the figure repeated
from
section 6.2.4.
The following diagram shows a typical situation of two waveguides that rotate together. Note that the
diagram should be considered as if the observer is behind the reflector looking towards the arc of
satellites. This representation is relevant for both prime focus and dual reflector antennas.
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