RC3000 Antenna Controller

Chapter 3

Detailed Operation

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.

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