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RC3000 Antenna Controller Chapter 3 Detailed Operation
100
3.3.1.2.2 Elevation Calibration
REF_V:1.69 OFF: 0.0 CONFIG-ELEV
DOWN: 0 UP: 90.0 SF:50.00
LOOK:1
SET REFERENCE VOLTAGE <0.50 – 4.50>
REF_V: SET REFERENCE VOLTAGE <0.50 - 4.50>
The elev_zero_voltage defines the voltage present when the elevation axis is at its reference position .
See the elevation zero voltage installation step.
OFF: ELEVATION OFFSET <-25.0/+25.0 DEGREES>
The elev_squint_factor configuration item corrects for discrepancies between the antenna's electrical and
mechanical bore sight alignment. The squint factor also compensates for errors in the attachment of the
elevation position sensor. The elevation squint factor is the difference between the antenna's theoretical
and actual elevation pointing angle. The value for this constant is determined during the elevation
alignment calibration procedure (2.4.2). The VALUE OF THIS CONSTANT MUST BE SET TO 0.0
BEFORE THE ELEVATION CALIBRATION OCCURS. The nominal value of this constant is 0.0.
DOWN: SET DOWN LIMIT <0-90 DEGREES>
UP: SET UP LIMIT <0-90 DEGREES>
The down_elev_limit and up_elev_limit configuration items specify the valid elevation operating range in
degrees. If the LOCATE mode calculates a target elevation outside of this range, an elevation range
error will be triggered.
The spiral search algorithm (when based on pot-based movements) also uses these values to limit the
area that may be searched.
SF: SCALE FACTOR <30.00 – 60.00 mV/deg>
The elev_scale_factor_mv_deg configuration item specifies the observed output of the elevation
inclinometer.
EL_LAT: ELEV LOOK CONFIGURATION <1>HIGH <0>LOW
The elevation_lat_configuration item is used for mount types that have different feed boom configurations
to achieve different elevation pointing angles. The reported elevation angle will be offset by different
values according to whether the high or low elevation configuration is specified. Other elevation related
items such as stow and deploy positions will also be affected. NOTE: for mounts that have only one
feed boom configuration, this configuration item may be set to either value with no consequence.