Filter
Top Products
RC3000 Antenna Controller Chapter 3 Detailed Operation
104
3.3.1.2.4 Polarization Calibration
REF_V:2.50 OFF: 0.0 CONFIG-POL
CCW: 90.0 CW: 90.0 SF:41.67
TYPE:2 REF:1 H: -45.0 V: 45.0 AUTO: 1
SET REFERENCE VOLTAGE <2.00 – 3.00>
REF_V: SET REFERENCE VOLTAGE <2.00 - 3.00>
The pol_zero_voltage defines the voltage present when the polarization axis is in its center of motion.
See the zero voltage installation section 2.3.4.
OFF: POL OFFSET <-90.0/+90.0 DEGREES>
The pol_offset item corrects for discrepancies between the polarization axis’ electrical and mechanical
alignment.
TYPE: <1>CIRCULAR <2>SINGLE <3>DUAL
The polarization_type configuration item specifies the configuration of the feed drive. This item will be
used by the controller to determine the appropriate automatic movement of the polarization axis.
Circular type specifies that no movement will be needed to align the polarization axis.
Single type specifies that the installation has a feed in just one orientation and therefore separate
movements must be made to achieve horizontal and vertical polarization positions.
Dual type specifies that separate feeds exist 90 degrees apart. For this configuration just one movement
to achieve both horizontal and vertical positions is required. If this is not the case the system should be
described as a single feed type so that separate movements will be made.
SF: SCALE FACTOR <1.00 –180.00 deg/volt>
This value specifies the scale factor applicable to the potentiometer-based polarization feedback. NOTE:
The default value for this item will typically be correct.
HOR: DEFAULT HORIZONTAL POS.<-180/+180 DEG.>
VER: DEFAULT VERTICAL POS.<-180/+180 DEG.>
The default_hpol_cnt and default_vpol_cnt configuration items allows the user to specify default values
for horizontal and vertical polarization. Note that when a satellite is “stored” unique values for H and V
may be stored.
CW: POL CW LIMIT<0.0 - 179.9 DEGREES>
CCW: POL CCW LIMIT<0.0 - 179.9 DEGREES>
The cw_pol_limit and ccw_pol_limit configuration items specify the range of polarization axis movement.
Both values are entered as positive values but the controller assigns the correct sign internally.
The values are used to check validity of stored satellite data and for calculating horizontal and vertical
polarization positions. Actual polarization limits are set by potentiometers as described in the installation
section.
AUTO: LOCATE AUTOMOVE <0>DISABLE <1>ENABLE
This item lets the user specify whether or not the LOCATE mode should attempt to automatically orient
the polarization axis
REF: <0>HORIZONTAL <1>VERTICAL
The orientation achieved by placing the polarization axis in the reference position.