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14 August 1997
Mode No.
Class 1
Class 2
2 *
GA 3 Setting
(Filter Mode)
3
Not used
4 *
GA 3 Setting
(White
Threshold)
4903 *
5 *
GA3 Setting
(Full Size)
6
GA 3 Setting
(Test Pattern
Output)
7 *
GA 3 Setting
(Main Shift
High)
8 *
GA 3 Setting
(Main Shift Low)
9 *
GA 3 Setting
(Switch
Separation)
All manuals and user guides at all-guides.com
Input the setting for all 8 bits at once
as a decimal value.
(e.g. To set the MTF filter strength of
the the generation mode to 'weak',
the input value should be 16 as
shown below, assuming all other
parameters are at the 'zero' setting.
00010000
The type of filter used in Photo mode
depends on the setting of SP4904-3.
Selects the coefficients and strengths
of the MTF filter and smoothing filter.
Do not change the value.
Changes the threshold level for dot
screen detection processing.
Do not change the value.
Selects whether the copy image is
always in the full size mode even if
the magnification ratio has been
changed.
This SP mode is used for checking
the magnification function in the main
scan direction, which is performed by
the GA3 chip.
Prints the test pattern for the GA3 or
selects one of the following video
data outputs for printing.
0. Normal
1. Test pattern print out
2. Skips the magnification
processing.
3. Skips the filter processing
4. Skips the GA3 functions
This SP mode is used for checking
the GA3 functions.
Changes the image shift amount for
the main scan direction in
magnification mode.
Do not change the values of 4903-
7 and 4903-8.
Changes the threshold ratio for auto
text/photo separation processing.
29
Function
o
16
SP MODE
Settings
0 ~ 16
1 /step
3
0 ~ 255
1 /step
80
0: Normal
Operation
1: Always full
size mode
0 ~ 255
1 /step
0
25 ~ 255
1 %/step
170 %
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