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R5975238 BARCOVISION 701 MULTIMEDIA 070497
APPENDIX E : ADJUSTMENT BLOCKS
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R5975238 BARCOVISION 701 MULTIMEDIA 070497
APPENDIX E : ADJUSTMENT BLOCKS
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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
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