Adjustment Blocks and Source Numbers
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| ADJUSTMENT BLOCKS AND SOURCE |
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| NUMBERS 90 - 99 | |
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Adjustment Blocks (memory blocks)
As the BARCOGRAPHICS 808s 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 once the source has been 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 Adjustment 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 Interpolation 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 values for all adjustments (eg. Convergence and Geometry) in the projector for 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 Switch Configuration | Front/Ceiling |
The data representing the various adjustments for the source follows the block header.
Source numbers 90 - 99
Source numbers 90 - 99 do not correspond to physical inputs to the projector or RCVDS. They are used to assign an additional adjustment block to a source. This additional adjust- ment block may contain different geometry and convergence settings, sync fast/slow positions and enhanced blue on/off settings. The relationship between source numbers 0 - 9 and 90 - 99 (projector with RCVDS) or 1 - 5 and 91 - 95
source number 0 | Block header A |
source input 0 |
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source number 90 | Block header A, differ- |
| ent analog settings |
source number 1 | Block header B |
source input 1 |
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source number 91 | Block header B, differ- |
| ent analog settings |
source number 2 | Block header C |
source input 2 | Block header C, differ- |
source number 92 | |
| ent analog settings |
source number 9 | Block header J |
source input 9 |
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source number 99 | Block header J, differ- |
| ent analog settings |
5975007 BARCOGRAPHICS 808s 160996 |
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