Research Concepts RC2000C - Manual (Page 63)

RC2000C Az/El Tracking Antenna Controller Chapter 5 Modes Function Description 55
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The following items set the controller's CW and CCW polarization limits when a rotating feed is installed.
The procedure to determine these limits is given in section 3.3. Note that the CW limit must by
definition be less than the CCW limit.
ROTATING FEED CW LIMIT: CONFIG
0-1023 ENT,BKSP,SCRLL ^v
ROTATING FEED CCW LIMIT: CONFIG
0-1023 ENT,BKSP,SCRLL ^v
The Rotating Feed Jog Duration CONFIG mode item controls the length of time (in milliseconds) that
the polarization motor drive signals are applied when a polarization jog command is received via the
serial communications port. The setting of this parameter determines the accuracy with which the
polarization can be adjusted via remote control.
ROTATING FEED JOG DURATION:1000 CONFIG
175-3000 MSEC ENT,BKSP,SCRLL ^v
5.10.7 Azimuth and Elevation Drive Options
The CONFIG mode items described in this section set the movement parameters for the azimuth and
elevation axis. The default values of these parameters (as initialized upon system reset) are adequate
for use with 36-volt linear actuators. For systems employing linear actuators, it is recommended that
these values not be changed from the default values. The provision to modify these parameters is
included for those customers who use the azimuth and elevation drive outputs from the RC2000C to
drive a pair of 36 volt relays (equipped with steering diodes) which in turn activate AC motors. More
information about using the RC2000C in this fashion may be found in the Appendix entitled "Controlling
Antennas Powered by AC or Large DC Motors with the RC1000 or RC2000 Antenna Controllers".
Access to the CONFIG mode items described in this section is permitted only when the Expert Access
flag is set.
The Az/El Drive Options Enable CONFIG mode item is the controlling item for the other CONFIG mode
items described in this chapter. When this item is disabled the user does not have access (via CONFIG
mode) to the other items described in this section. Note that when this item is disabled, the current
values of the other items described in this section are used to control azimuth and elevation movement.
In other words, disabling this item does not reset the other items described in this section to their default
values.
AZ/EL DRIVE OPTIONS ENABLE:0 CONFIG
0-DISABLE, 1-ENABLE ENT,BKSP,SCRLL ^v
During an automatic move, when the antenna position is within Az/El Fast/Slow Threshold position
counts of the target position, the antenna speed will switch from fast to slow.
AZ/EL FAST SLOW THRESHOLD: 80 CONFIG
0-400 COUNTS ENT,BKSP,SCRLL ^v
The Az/El Auto Retry Attempts CONFIG mode item sets the maximum number of attempts which will be
made to hit a target position (within Max Position Error counts - described below) during an automatic
move initiated from AUTO or TRACK modes.
AZ/EL AUTO RETRY ATTEMPTS:3 CONFIG
2-5 ENT,BKSP,SCRLL ^v
The 'Fast Deadband and 'Slow Deadband CONFIG mode items are used for the anti-reversal system.
To understand the purpose of these parameters, it is necessary to consider how position counts are
accumulated. The feedback from the azimuth and elevation position sensors are pulses. When a pulse