Polarization Motor Option - RESEARCH CONCEPTS RC2000A DUAL AXIS Instructions Manual

RC2000A Dual Axis Antenna Controller
This is necessary because it is not possible to enter negative values via the keypad on the RC2000A.
ELEV SCALE FACTOR:
ELEV OFFSET:
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
0-SOUTH 1-NORTH
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. For software versions <v2.6x, the Rotating Feed Present? item is the controlling item for
access to the other items described in this section. For software versions v2.6x or higher, the Pol
Control? item is the controlling item for access to the other items described in this section.
Controllers with software versions <v2.6x: 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).
Controllers with software versions v2.6x or higher: The Pol Control? CONFIG mode item allows the
user to specify the following types of polarization control equipment ... i) no polarization control device,
ii) one port polarization control, iii) two port polarization control, or iv) Chapparal Polarotor type three
wire servo.
It is possible to have the latest software emulate the operation of previous software versions that
contain the Rotating Feed Present CONFIG mode item.
To emulate the polarization control behavior of previous versions of the software where the Rotating
Feed Present CONFIG mode item is set to 0 (FALSE), specify 3 – Polarotor at the Pol Control? prompt.
To emulate the polarization control behavior of previous versions of the software where the Rotating
Feed Present CONFIG mode item is set to 1 (TRUE), specify 1 – One Port at the Pol Control? prompt.
Note that if Two Port polarization control is specified the controller's AutoPol feature is disabled
regardless of the state of the AutoPol CONFIG mode item.
Research Concepts, Inc. • 5420 Martindale Road • Shawnee, Kansas • 66218-9680 • USA
Chapter 4
1 CONFIG
ENT,BKSP,SCRLL ^v
0 CONFIG
ENT,BKSP,SCRLL ^v
CONFIG
ENT,BKSP,SCRLL ^v
Modes
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