RESEARCH CONCEPTS RC4500 - Elevation Calibration; Installation Access Items

RC4500 Antenna Controller Chapter 5 MODES – In Depth Descriptions
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5.2.1.2 INSTALLATION ACCESS ITEMS
This set of configuration groups allows the user to modify parameters that are most typically changed for a
particular installation.
5.2.1.2.1 Elevation Calibration
CONFIG-ELEV
DOWN: 0.000 UP: 90.000
PSF:10431 ROFF:-180.000 DIR:0
DOWN LIMIT <-20.000-120.000 DEGREES>
DOWN: DOWN LIMIT <-20.000-120.000 DEGREES>
UP: UP LIMIT <-20.000-120.000 DEGREES>
These items specify the antenna's elevation range of travel. The angles refer to the raw resolver angle
(see
section 5.1.1.) When the RC4500 calculates an antenna pointing solution based on satellite
longitude in MOVETO mode, it checks these values to see if the dish can be physically moved to that
position.
Note that these values may also be used to actually limit the motion of the antenna. The UP Range
should be set to the elevation position which is displayed when the antenna is at the UP limit. In a similar
manner, the DOWN Range should be set to the elevation position which corresponds to the controller's
elevation down limit.
PSF: PULSE SCALE FACTOR <1 – 32767 CNTS/RAD>
This value specifies the approximate number of pulses measured per radian of elevation travel. This
value is used by inclined orbit tracking algorithms for determining movement amount (in pulses.)
NOTE: The default value for this item will typically be correct.
ROFF: RESOLVER OFFSET <+/- 300.000 DEGREES>
This item defines the offset to be applied to the angle read directly from the elevation resolver for the
purpose of displaying the elevation angle.
DIR: COUNT DIRECTION <0-NORMAL 1-REVERSED>
This item specifies the polarity of the raw resolver angle. If the resolver angle decreases when the
antenna mount moves UP, then the DIR item must be described as reversed.