Research Concepts RC2000C - Manual (Page 75)

RC2000C Az/El Tracking Antenna Controller Chapter 7 Troubleshooting/Alarm Codes 67
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7.2 Track Mode Errors
Should one of the following errors occur during TRACK Mode operation, the ERROR sub-mode will
activate. The error message will be displayed to the right of the ERROR banner on the second row on
the display. All tracking operations will cease until the error is corrected.
JAMMED
This error will occur if the controller does not sense feedback from the azimuth or elevation
position sensor when the antenna is commanded to move from TRACK mode. This error will
typically be accompanied by the ANT AZIM or ANT ELEV JAMMED system error described in
section 7.1.
LIMIT
The controller encountered an azimuth or elevation limit during a track movement operation.
This represents a serious error because it means the limits have to be changed to allow
tracking of this satellite. The AZIM CW or ELEV UP limit can sometimes be changed without
invalidating all satellite position data. Please refer to the appendix entitled ‘Restoring Non-
Volatile Memory’ for more information.
DRIVE
This error will occur if the ANT AZIM or ANT ELEV system errors occur. Please see section 7.1
for more information on these system errors.
PEAK LIMIT
This error indicates that the antenna moved too far in either azimuth or elevation while the
controller was attempting to peak the antenna. This error is described in section 4.4.5 -
Tracking Problems.
SCALE FACTOR
This error indicates that the controller was unable to calculate the antenna azimuth scale factor.
This error will only occur if the user has specified that the antenna azimuth scale factors are to
be calculated by the controller (by setting the Azim Constant CONFIG mode item to zero). To
calculate the azimuth scale factor, the controller requires that 2 geostationary satellites with
sufficient spacing be programmed into memory. If this error occurs, the user either needs to
program additional geostationary satellites into the controller's non-volatile memory via SETUP
mode or initialize the Azim Constant CONFIG mode item. See sections 4.3.2, 4.4.2, and
5.10.10.
SYSTEM
System errors were summarized in section 7.1.
CHECKSUM
This error indicates the memory in the satellite's track table or header has been corrupted. The
only way to correct this error is to re-initialize the satellite using SETUP mode. See section 5.6
7.3 Operational Troubleshooting Tips
THE CONTROLLER DOES NOT RETURN TO THE PROPER SATELLITE LOCATION (AND IS NOT
EVEN CLOSE)
When this occurs the controller is generally losing or gaining position counts for a given axis as
the antenna moves about that axis. Please review the items mentioned in Section 3.2 -
Azimuth and Elevation Position Sense.
If the cause of the problem is not found and only one axis is affected, consider replacing the
position sense module and/or magnets in the actuator. If both axis are affected the motor drive
wires may have to be shielded. This is seldom necessary, but if it is, follow the rules for
connecting the shields as outlined in Section 3.2.
THE CONTROLLER RETURNS TO APPROXIMATELY THE CORRECT POSITION BUT MUST BE
PEAKED MANUALLY TO ACHIEVE A GOOD SIGNAL