Gestetner A294 Service Manual page 71

Rev. 2/2000
Text Mode
MTF filtering is used in text mode. The MTF filtering coefficient and strength can be
adjusted individually for both main and sub scan. Low density originals are
produced better when a stronger MTF filter is selected, but in this case, moiré
tends to appear.
With UP Mode (Copy/Document Server Features – General Features – Original
Mode Level), the user can select 'Soft', 'Normal', 'Sharp', and 'SP Mode Changed'.
The settings of the SP modes indicated with an asterisk (*) are not used unless the
user selects 'Service Mode'.
Input
Correction 1
Input
Correction 2
Filtering
Magnification
ID Control
Gradation
SM
CÓPIA NÃO CONTROLADA
Image Processing Steps
Auto Shading
Background Erase
Independent Dot Erase
MTF
Main Scan Magnification
γ Correction
Error Diffusion/
Line Width Correction
2-21
CÓPIA NÃO CONTROLADA
IMAGE PROCESSING
Related SP Modes
•
SP4903-065 *
(Scanner Gamma Threshold
Level)
•
SP4903-070 *
(Background Erase Level)
•
SP4903-060
(Independent Dot Erase Level)
•
SP4903-010 to 011 *
(Pre-Filter Coefficient)
•
SP4903-020 to 035 *
(MTF Filter Strength)
•
SP2909-001
(Main Scan Magnification)
•
SP4903-84 *
(Scanner gamma setting)
•
SP4903-78 to 80 *, 4904-20
(Line Width Correction Type)
A294/A295