Mode No. Function Settings
Class 1 Class 2
4903 *
1 *
GA 3 Setting
(Filter Level)
Selects the strengths of the MTF and
smoothing filters.
bit 7, 6: Letter Mode (MTF)
00: Normal 01: Weak 10: Weaker
11: Weakest
bit 5, 4: Generation Mode (MTF)
00: Normal 01: Weak 10: Weaker
11: Weakest
bit 3: Not used
Keep at "0"
bit 2: Letter/Photo Mode (Smoothing)
0: Sharp 1: Smooth
bit 1: Photo Mode (MTF)
0: Weak 1: Strong
bit 0: Photo Mode (Smoothing)
0: Smooth 1: Sharp
0 ~ 255
0
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
→
16
The type of filter used in Photo mode
depends on the setting of SP4904-3.
2 *
GA 3 Setting
(Filter Mode)
Selects the coefficients and strengths of
the MTF filter and smoothing filter.
0 ~ 16
1 /step
3
Do not change the value.
3 Not used
4 *
GA 3 Setting
(White
Threshold)
Changes the threshold level for dot
screen detection processing.
0 ~ 255
1 /step
80
Do not change the value.
5
GA3 Setting
(Full Size)
Selects whether the copy image is always
in the full size mode even if the
magnification ratio has been changed.
0: Normal
Operation
1: Always full
size mode
This SP mode is used for checking the
magnification function in the main scan
direction, which is performed by the GA3
chip.
6
GA 3 Setting
(Test Pattern
Output)
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.
A195
Copier
25 April 1997 SERVICE PROGRAM MODE TABLES
23
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