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Adjustment Blocks and Source Numbers 90-99
B-1
5975007 BARCOGRAPHICS 808s 160996
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 (stand-alone
projector) is shown in the diagram below.
source input 0
source input 2
source input 1
source input 9
source number 0
source number 90
source number 1
source number 91
source number 2
source number 92
Block header A
Block header A, differ-
ent analog settings
Block header B
Block header B, differ-
ent analog settings
Block header C
Block header C, differ-
ent analog settings
source number 9
source number 99
Block header J
Block header J, differ-
ent analog settings
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ADJUSTMENT BLOCKS AND SOURCE
NUMBERS 90 - 99