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RC3050 Antenna Controller
Chapter 2
Installation
REFERENCE POSITION VERIFICATION
To verify that data has been entered correctly, return to the MANUAL mode screen. Make sure the
azimuth, elevation and polarization axis are the reference positions used in the previous steps. The
displayed azimuth angle should be 0.0 +/- 0.3 degrees. The displayed elevation angle should be near
the elevation offset value for your mount (see appendix A). The displayed polarization angle should be
0.0 +/- 0.3 degrees.
2.3.4 Azimuth and Polarization Electrical Limits
In this step, the antenna's azimuth and polarization electrical limits are set. These limits are set using
four potentiometers on the controller's analog board thus it will be necessary to remove the controller's
top cover. These four pots are labelled A-CW (azimuth clockwise), A-CCW (azimuth counter-clockwise),
P-CW (polarization clockwise), P-CCW (polarization counter-clockwise). These 4 pots on the analog
board are accessed via holes in the feature board.
To set the azimuth clockwise limit, go to MANUAL mode and jog the antenna in azimuth to the desired
azimuth clockwise limit. If the controller indicates that the azimuth clockwise limit is reached before the
antenna reaches the desired position for that limit, the A-CW pot may have to be adjusted to allow the
antenna to move. Adjust the A-CW pot until the azimuth limit indication flickers between CW and
blank.
To verify that the A-CW has been adjusted properly, verify that the antenna cannot move clockwise in
azimuth but can move counter-clockwise.
A similar procedure is used to set the azimuth counter-clockwise limit, polarization clockwise limit, and
polarization counter-clockwise limit. Once the limits have been set, replace the cover of the controller
and install the controller in the instrument rack.
2.3.5 Fast/Slow Motor Speed
The fast and slow output voltages for your particular mount will be set at the factory and typically will not
need to be adjusted. On RC3050B models, there is only one fast/slow adjustment potentiometer on the
analog board. On RC3050A models, there are fast/slow adjustment potentiometers for each axis on the
relay board next to the digital board.
The slow speed for an axis should be set low enough that automatic movements perform smoothly.
Care should be taken that slow speed is not set so low that the axis is prone to jamming.
2.3.6 Drive System Checkout
This step confirms the configuration of the drive system for all three axis. Manually move the mount to
each axis limit and confirm drive current to the motor is shut off when the limit is reached. Also check the
displayed position value and confirm that it is reasonable.
Perform the STOW (3.2.2.2) and DEPLOY (3.2.2.3) functions and confirm the mount correctly stows and
deploys.
2.4 Miscellaneous Adjustments
LCD Contrast
An LCD contrast potentiometer is located on the RC3050 digital board. This potentiometer will be set at
the factory but the user may want to adjust its setting for a particular installation's lighting conditions.
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Research Concepts, Inc.; 5420 Martindale Road; Shawnee, Kansas 66218-9680 USA
www.researchconcepts.com
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