Research Concepts RC2000A - Manual (Page 42)

42 RC2000A Dual Axis Antenna Controller Chapter 4 Modes
ELEV SCALE FACTOR: 1 CONFIG
ENT,BKSP,SCRLL ^v
ELEV OFFSET: 0 CONFIG
ENT,BKSP,SCRLL ^v
The Hemisphere CONFIG mode item is used to calibrate the azimuth display angle (see the formula
above for the displayed azimuth angle). North America, Europe, Asia, and the Northern half of Africa lie
in the northern hemisphere. Australia and most of South America lie in the southern hemisphere.
HEMISPHERE:1 CONFIG
0-SOUTH 1-NORTH ENT,BKSP,SCRLL ^v
4.10.7 Polarization Motor Option
The controller has an internal expansion port, which can accept optional daughter boards. Two
daughter boards are available which can provide polarization control. The daughter boards are
designated RC2KPOL and RC2KHPP. The RC2KPOL is designed for use with the Seavey model ESR-
124D motorized feed with potentiometer feedback. The Seavey feed requires 24 volts DC at 500
milliamps. The RC2KHPP option is designed for motorized feeds with up to 3 amps. Version 1.50 of
the software supports the RC2KPOL option. Version 1.51 supports the RC2KHPP option. If either of
these options is installed in the unit, a 5-position connector labeled J4 will be present on the back panel
of the unit above the pots labeled AGC1 and AGC2.
The CONFIG mode items described in this section are used to enable the controller to interface with
one of the motorized feed options described above, and to calibrate the display of the polarization motor
position in an angle format. Access to these CONFIG mode items is allowed only if the Expert Access
Flag is set. The Rotating Feed Present? item is the controlling item for access to the other items
described in this section.
The Rotating Feed Present? CONFIG mode item is used to inform the controller whether or not a
polarotor is present in the system. If one of the motorized feed options is installed, this parameter
should be set to YES and the POL LIMITS mode should be invoked to set the polarization limits (see
section 3.3).
ROTATING FEED PRESENT?:1 CONFIG
O-NO 1-YES ENT,BKSP,SCRLL ^v
The Pol Angle Display CONFIG mode item determines the display format of polarization positions when
one of the motorized feed options is installed in the controller. If this item is enabled the polarization
position will be displayed in an angle format.
POL ANGLE DISPLAY:0 CONFIG
0-DISABLE, 1-ENABLE ENT,BKSP,SCRLL ^v
When the Pol Angle Display item is enabled, the calibration of the angle display feature is controlled by
the Pol Display 0 Deg Cnt and Pol Display 90 Deg Cnt items. When the polarization position is equal to
the value which is entered for the Pol Display 0 Deg Cnt item, the angle displayed will 0.0. In a similar
fashion, when the polarization position is equal to the value, which is entered for the Pol Display 90 Deg
Cnt, the displayed angle will be 90.0. All other polarization positions are scaled in a linear fashion.
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