Research Concepts RC2000C - Manual (Page 79)

RC2000C Az/El Tracking Antenna Controller Appendix A1 Restoring Non-volatile Memory 71
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Appendix A1 - Restoring Non-Volatile Memory
This appendix outlines a procedure that allows the user to restore the contents of non-volatile memory.
A number of events can make this necessary, including:
i. changing the battery which powers the non-volatile memory and allowing the center tab of the
battery holder to touch the base of the battery holder,
ii. performing maintenance on the controller,
iii. swapping one controller out for another, or
iv. upgrading to a newer version of the software which uses a memory map different from the original
memory map.
Here is the procedure ...
1. In manual mode, jog the antenna to the Azim CW and Elev up limit. Record the position count
value for each axis just before the limit is reached. (If position display in degrees is enabled, disable
that feature before starting this procedure.)
2. Go to CONFIG mode and record the value of each CONFIG mode item.
3. Using AUTO mode, position the antenna on each of the geostationary satellites stored in non-
volatile memory. Record the azimuth and elevation positions and the longitude value of each
geostationary satellite. Use the H and V keys to position the polarization control device (if one is
present in the system). Record the H and V positions for each satellite. (If polarization position
display in degrees is enabled, disable that feature.)
4. Move the antenna to the position just before the Azim CCW and down limits are reached. This
should correspond to a position count value of 30 for both the azimuth and elevation axis.
5. Turn the unit off, unplug the unit from the AC power, and perform whatever maintenance is
required. If the EPROM is replaced, be sure to insert the chip into the socket properly. The notch
on the end of the chip should line up with the notch of the outline silk-screened onto the printed
circuit board under the EPROM socket. When the maintenance has been performed, power the
unit up. If the non-volatile memory has been corrupted, the unit will either go to LIMITS mode or will
flash an error message on the bottom line of the display. If this occurs, the following steps of this
procedure will have to be performed to restore the non-volatile memory.
6. Go to LIMITS mode. WITHOUT MOVING THE ANTENNA set the Elev down and Azim CCW limits.
AFTER THE AZIM CCW AND DOWN LIMITS HAVE BEEN SET, jog the antenna to the positions
for the Azim CW and up limit recorded in step 1. Set the AZIM CW and up limits. After the AZIM
CW and up limits have been set, exit LIMITS mode by hitting the MODE KEY.
7. Go to CONFIG mode and key in the data recorded in step 2 above. Each entry must be terminated
with the ENTER key. After the data has been entered scroll through the CONFIG mode items
(using the SCROLL keys) and make sure that the data has been entered correctly.
8. In this step, the positions of the geostationary satellites are stored in non-volatile memory. Go to
SETUP mode. Position the antenna on each of the satellites that were recorded in step 3 above.
The satellites should be found at the locations that were recorded in step 3 above. Select the
satellite name, enter the satellite longitude, and move the polarization control device to the H and V
positions in response to the appropriate SETUP mode prompts.