Appendix A1 - Restoring Non-Volatile Memory - Dawn CONTROL-1500A Manual

Remote controlled antenna controller for single axis antennas

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CONTROL-1500B Single Axis Antenna Controller

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 upgrading to a newer version of the software which uses a memory map different from the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.

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