HP RC3000 manual Refv SET Reference Voltage 2.00, Off, Type 1CIRCULAR 2SINGLE 3DUAL

RC3000 Antenna Controller		Chapter 3	Detailed Operation
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.

104