RESEARCH CONCEPTS RC3000 User Manual page 69

RC3000 Antenna Controller
The azimuth scale factor is obtained by noting the difference in the azimuth pointing solution angles
between two satellites and the pulse counts when on the satellites. For best results, use satellites that
are as far apart as possible and make sure you have positively identified the satellites.
Example : Kansas City (38'56N,94'45W) heading of 180.0
SATELLITE
SPACENET 2 (69.0W)
SATCOM C5 (135.0W)
Difference
(22333 / 90.9) * 57.29 = 14075 pulses/radian
SCALE FACTOR FOR RESOLVER SYSTEMS
The RC3000 uses the actual digitized resolver count in the same way it uses a pulse count. The RC3000
utilizes a 16 bit resolver to digital converter which generates a count value from 0 to 65,535. Typically the
resolver sensor rotates with the antenna. The resulting "pulse scale factor" therefore is:
65536 reslover counts / ( 360 degrees * 1 radian/57.29 degrees) = 10430.2 "pulses" / radian
The default scale factor for a resolver system is therefore rounded up to 10431.
The constants are entered via the azimuth pulse drive (3.3.1.7) and elevation pulse drive (3.3.1.10)
configuration item screens.
Chapter 2
AZIMUTH POINTING
SOLUTION ANGLE
-37.5
53.4
90.9
61
PULSE
COUNT
33333
11000
22333
Installation