WR-ARP-ELAZ-100 and WR-RCU-100 Technical User’s Guide
Rev. F
17
9.4. Rotator Offset Adjustments
Offset values may differ between various rotators,
depending on variations in the mechanical
construction. Rotator offset values associated with the
rotator control unit that is controlling it, are stored on
the host computer’s hard disk together with its serial
number. This allows the software to control multiple
rotators from a single computer, remembering the
offset values for each rotator.
Azimuth Offset
The rotator provides a greater azimuth range than the required 360 degrees. The full
mechanical rotator range is determined by the rotator control unit during calibration.
By using the azimuth offset setting, the user can place the required 0-360 degree
range in the centre of the full mechanical range. The maximum azimuth offset
achievable in either direction is determined as:
Maximum azimuth offset = ((Full mechanical rotator azimuth range)-360)/2
The WiNRADiO WR-ARP-ELAZ-100 rotator has a full mechanical rotator azimuth
range of around 370 degrees, giving it an over-travel of about 10 degrees, and hence
an azimuth offset range from approximately -5 to +5 degrees. A positive value for
azimuth offset rotates the antenna clockwise with respect to the travel range
reference points on the user interface, while a negative value rotates it counter-
clockwise.
Summary of Contents for WR-ARP-ELAZ-100
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