Appendix A1 - Restoring Non-Volatile Memory - RESEARCH CONCEPTS RC2000C Manual

RC2000C Polar Tracking Antenna Controller

Appendix A1 - Restoring Non-Volatile Memory

This appendix outlines a procedure which 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 upgrading to a newer version of the software which uses a memory map different from the original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 west and 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 polarotor. 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 east 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 in 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 down and east limits. AFTER THE
EAST AND DOWN LIMITS HAVE BEEN SET, jog the antenna to the positions for the west and up
limit recorded in step 1. Set the west and up limits. After the west 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 which were recorded in step 3 above.
Select the satellite name, enter the satellite longitude, and move the polarotor to the recorded H and
V positions in response to the appropriate SETUP mode prompts.
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Appendix A Restoring Non-Volatile Memory 69
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