APPENDIX E : ADJUSTMENT BLOCKS
Adjustment Blocks (memory blocks)
As the BARCOVISION 701 MULTIMEDIA is digitally controlled, all geometry and convergence adjustments are stored in the projector’s memory as numeric values. These numeric values are used to control digital potentiometers which in turn, control the projector. Each source connected to the projector has a unique set of adjustment data which is automatically downloaded into the projector’s digital potentiometers as the source is selected. This set of adjustment data is referred to as an “adjustment block”.
An adjustment table is automatically created for a source when the source is first connected to the projector and the adjust mode is entered. If other sources have already been connected to the projector and geometry and convergence adjustments have been performed on these sources, the projector will use Linear Digital Interpo- lation to create a new block for the new source. This block will provide an initial set of adjustments for the new source that have been calculated by the projector from “previous experience”.
The projector’s memory has the capacity to store 32 adjustment blocks. The adjustment block consists of two parts, the block header and the data representing the convergence and geometry adjustments of the source the block corresponds to. The block header contains the basic characteristics of the source and the projector configuration used to display the source.
Block Header | example of block header |
Block number | 01 |
Source number | 01 |
Horizontal frequency | 15.6 kHz |
Vertical frequency | 50 Hz |
Input type | video |
Scan inversion switch configuration | front/ceiling |
The data representing the geometry and convergence adjustments for the source follows the block header.
The 32 adjustment blocks are in use. What to do?
A. Projector without any peripheral connected to the 'peripheral 800 port'
Connect a new source to the projector. Due to the fact that there are no adjustment
APPENDIX E : ADJUSTMENT BLOCKS
R5975238 BARCOVISION 701 MULTIMEDIA 070497 |
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