RC3000 Antenna Controller Appendix B-Mount Specific Data B-7
2.3 Initial Configuration
2.3.1 Software Initialization
Reset Defaults. The table at the end of the document supplies the default configuration item values for
the VE and VF versions.
NOTE: All configuration item values should be examined to determine if they are appropriate for your
specific installation.
2.3.2 Elevation Calibration
Elevation calibration will be as described in the baseline manual.
Elevation Reference Position. Both the inclinometer and elevation resolver should be calibrated while
the antenna’s face is vertical (i.e. the elevation reference position).
With the inclinometer oriented as described in 2.1.4 the elevation reference voltage should be
approximately 0.81 volts.
VF: The stow current limit (3.3.1.3.10) will need to be set to the value required to obtain the correct
amount of stow “preload”.
2.3.3 Azimuth Calibration.
The only position sensor on the azimuth axis is a resolver. Azimuth calibration will be as described in the
baseline manual.
Azimuth Limits. In addition to using CW and CCW limit switch inputs, this version of the RC3000
implements “software” limits. The azimuth CW and CCW pulse limits (3.3.1.3.3) should be set to values
that reflect the azimuth resolver count values near the end of azimuth travel. When the RC3000 senses
that the azimuth axis has reached these values, it will generate a “software” limit condition even though
the actual hardware limit has not been reached. If the user does not want to use the “software limit”
feature, set these configuration items to values outside the range of normal azimuth travel.
Auxiliary Down Region Calibration.
The VE/VF versions implement an “auxiliary down region” that allows the mount to achieve lower
elevation look angles (in some areas of travel) than is normally permitted. Compare the following
drawing to the drawing in section 1.3.7 of the baseline manual. The auxiliary down region prevents the
mount’s feed boom from contacting the top of the vehicle when the azimuth position is near the center of
travel. This auxiliary region is defined by software values as discussed in section 3.3.1.3.14.
CCW
CW
UP
DOWN
STOW
Elevation
Axis
Azimuth
Axis
STOW
down
aux_down_ccw
aux_down_cw
aux_down
aux_down_limits.dwg
(17 Seiten)
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