Research Concepts RC2000A - Manual (Page 56)

56 RC2000A Dual Axis Antenna Controller Appendix B Field Upgrading
Appendix B - Field Upgrading
This appendix outlines a procedure that allows the user to restore the contents of non-volatile memory.
The controller firmware is contained in an EPROM memory chip. Firmware upgrades may also require
the replacement of a programmable logic device (PLD). Changing the EPROM and PLD may
sometimes corrupt the data stored in the non-volatile memory of the controller. Other procedures
performed on the controller may require a restoration of non-volatile memory such as:
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,
This procedure ensures that this data is valid after the upgrade. Following the firmware upgrade
procedure, the system reset and operating voltage change procedures are listed.
Updating In-Service RC2000 Firmware
1. With your current controller, enter into CONFIG mode and verify that Expert Access is enabled.
(See manual section 4.10.9 for enabling instructions) Verify that REMOTE MODE is enabled. (See
manual section 4.10.3 for enabling instructions) Scroll through the config mode item list with the
SCROLL UP and SCROLL DWN keys. Log every item on the included worksheet.
2. Verify that the ANGLE DISPLAY ENABLE feature is disabled. (Section 4.10.6) Verify that the POL
ANGLE DISPLAY is disabled. (Section 4.10.7)
3. Using AUTO mode, position the antenna on each of the geostationary satellites stored in memory.
Record the name, longitude, and azimuth/ elevation count values for each on the bottom half of the
Config mode items worksheet at the end of this section. While positioned on each satellite, use the
H and V keys to move to horizontal and vertical polarization. Record these values on the
worksheet.
4. Jog the Antenna to the CW and Up limits, record the values displayed just prior to the limit on the
worksheet.
5. If a rotating feed is present (Section 4.10.7), manually rotate the feed to the CW and CCW limits.
Record the displayed position just prior to the limits on the worksheet.
6. Position the Antenna at the CCW and DOWN limits.
7. Turn the unit off and disconnect it from the remaining components of the antenna system. Move the
unit to a static-free workstation for chip replacement. Remove the lid and position the unit on the
bench facing toward you. Make sure proper grounding straps are used to avoid static discharge
damage to the processor section.
8. Locate the RC2000 digital board (RC2KDIG2) located on the right side of the unit. Remove the
existing EPROM chip (U4) from its socket and replace it with the upgrade EPROM. If necessary
locate and remove the PLD chip (U2) from its socket and replace it with the upgrade PLD.
9. Make sure the chip (or chips) is oriented properly in its socket. The notch or dot should line up with
the notch of the outline silk-screened onto the PCB under the socket. Make sure that the legs of the
EPROM package fit into each pin socket and do not bend up under the IC upon insertion.
10. Replace the lid, reinstall the 2000 into the rack, and reconnect the other components of the antenna
system.
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