User's Manual Part 3

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CONTROLLER MODULE MTG0079AR0
SCH0135AR1 DESCRIPTION
The Controller module, located on the right side of the VEGA
TV modulator, is the user interface of the whole modulator. It
gathers the data from all the sections of the modulator, processes
them by means of a 16bit flash micro-controller by Fujitsu and
makes them available to the user both through the local interface,
composed by a display and a knob, and the remote interface
made up by the serial port (either the RS232 on the front or the
RS485 on the back, as selected) or the interface of the
telemeasuring connector.
The acquisition and setting of all the concerned parameters is
made in two different ways. Analog measures reach the board
from the individual modules as voltages, are conditioned on the board and then converted by an internal A/D
converter in the micro.
The remaining parameters are gathered through a 2-wire RS485 interface, which runs on the bus. The display
board acts as master on this 485 bus. Besides it is provided with an RTC and a non-volatile memory on an
internal I2C bus.
- Dip-Switch
The display board is provided with 4 dip-switches. The dip-switches 3 and 4 are used to program the flash
memory of the flash micro-controller by Fujitsu, in detail:
DIP3: On DIP4: Off Boot Programming
DIP3: Off DIP4: On Run or Firmware Programming
The "Boot Programming" configuration is only for BIOS programming purposes.
Once the BIOS has been programmed, the firmware has to be programmed at least once in order to use the
board. The firmware programming and the normal operation of the board are obtained with the same position
of the dip switches.
For more detail on Firmware upgrade please refer to the "Firmware Upgrade" section.
DIP2: On Factory setting
DIP2 is set to ON only during the factory setup of the exciter. This allow to store in the memory all of the
settings made as 'factory defaults'.
Once the test is completed, and while the modulator is used normally, the DIP2 must be kept OFF.