Gestetner B003 Service Manual page 225

SP4 Mode Number
4903* 10* Pre-Filter: Text 25%~64%
11* Pre-Filter: Text 65%~154%
12* Pre-Filter: Photo
13* Pre-Filter: Text/Photo
25%~64%
14* Pre-Filter: Text/Photo
65%~154%
15* Pre-Filter: Light
16* Pre-Filter: Generation
SM
SERVICE PROGRAM MODE
Function and [Setting]
Selects the Pre-Filter coefficient in the main
scan direction for text mode. Pre-filter
emphasizes lines parallel to the direction of
feed. (☛ Chap.6, "Image Processing".
[0~3 / 0 / 1 step]
Increasing this value strengthens smoothing but
can also increase the occurrence of moiré and
reduce sharpness.
Selects the Pre-Filter coefficient in the main
scan direction for text mode. Pre-filter
emphasizes lines parallel to the direction of
feed. (☛ Chap.6, "Image Processing".
[0~3 / 0 / 1 step]
Increasing this value strengthens smoothing but
can also increase the occurrence of moiré and
reduce sharpness.
Selects the Pre-Filter coefficient in the main
scan direction for photo mode. (☛ Chap.6,
"Image Processing".
[0~3 / 0 / 1 step]
Selects the Pre-Filter coefficient in the main
scan direction for text/photo mode (25%~64%)
emphasizes lines parallel to the direction of
feed. (☛ Chap.6, "Image Processing".
[0~3 / 1 / 1 step]
Increasing this value strengthens smoothing but
can also increase the occurrence of moiré and
reduce sharpness.
Selects the Pre-Filter coefficient in the main
scan direction for text/photo mode (65%~154%)
and emphasizes lines parallel to the direction of
feed. (☛ Chap.6, "Image Processing".
[0~3 / 0 / 1 step]
Increasing this value strengthens smoothing but
can also increase the occurrence of moiré and
reduce sharpness.
Selects the Pre-Filter coefficient in the main
scan direction for low density mode and
enhances lines parallel to the direction of feed.
(☛ Chap.6, "Image Processing".
[0~3 / 0 / 1 step]
Increasing this value strengthens smoothing but
can also increase the occurrence of moiré and
reduce sharpness.
Selects the Pre-Filter coefficient in the main
scan direction for copied original mode
emphasizes lines parallel to the direction of
feed. (☛ Chap.6, "Image Processing".
[0~3 / 0 / 1 step]
Increasing this value strengthens smoothing but
can also increase the occurrence of moiré and
reduce sharpness.
5-19 B003/B004/B006/B007