RESEARCH CONCEPTS RC2000A DUAL AXIS Instructions Manual page 44

44 RC2000A Dual Axis Antenna Controller
type antenna mount. Please see section 3.7 for more information on how to enable and calibrate this
feature. Access to these CONFIG mode items allowed only when the Expert Access Flag is set.
Briefly, to calibrate the angle display feature, the user locates two satellites and records their azimuth
and elevation position count values. The scale2.exe PC program (for IBM compatibles - shipped with
each controller) is then used to calculate azimuth and elevation scale factors. These scale factors are
entered into controller via the CONFIG mode items described in this section. The scale2.exe program
prompts for the antenna latitude and longitude, and the longitude, azimuth position count, and elevation
position count values for a pair of satellites which have been located with the controller.
The Angle Display Enable item is the controlling item for the other items described in this section.
When this parameter is set to 1 (enabled), azimuth and elevation positions are displayed in an angle
format using the other items described in this section.
ANGLE DISPLAY ENABLE:0
0-DISABLE, 1-ENABLE
The Azim Scale Factor and Azim Offset items are used to calibrate the display of azimuth position
according to the following formula:
Display_Angle = 180.0 +
((100 * (Azim_Position_Cnt - Azim_Offset)) / Azim_Scale_Factor)
(Northern Hemisphere)
Display_Angle = 360.0 -
((100 * (Azim_Position_Cnt - Azim_Offset)) / Azim_Scale_Factor)
(Southern Hemisphere - Note the displayed angle is adjusted by adding or subtracting 360.0 so that the
result is in the range of 0 to 360.0 degrees. )
The range of values that the user must specify for the 'Azim Offset' CONFIG mode item is 0 to 65535.
Values in the range of 32768 to 65535 are converted to negative offset values for Azim_Offset in the
above equations according to the following relationship:
Azim_Offset = Azim Offset (CONFIG mode item entered by user) - 65536
This is necessary because it is not possible to enter negative values via the keypad on the RC2000A.
AZIM SCALE FACTOR:
AZIM OFFSET:
The Elev Scale Factor and Elev Offset items are used to calibrate the display of elevation position
according to the following formula:
Display_Angle = (100 * (Elev_Position_Cnt + Elev_Offset)) / Elev_Scale_Factor
The range of values that the user must specify for the 'Elev Offset' CONFIG mode item is 0 to 65535.
Values in the range of 32768 to 65535 are converted to negative offset values for Elev_Offset in the
above equations according to the following relationship:
Elev_Offset = Elev Offset (CONFIG mode item entered by user) - 65536
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Chapter 4
CONFIG
ENT,BKSP,SCRLL ^v
1 CONFIG
ENT,BKSP,SCRLL ^v
0 CONFIG
ENT,BKSP,SCRLL ^v
Modes
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