VT2300/VT2500 Circuit in Line Mode:
Line Mode
Line/Photo
Setector
Seleetor 2
VPH of Shading
Distortion
a
Memory
VH
I I
1
1
I
I
I
I
c)
4 bit
Image
Signal
Density: O
‘r
A/D Converter
Density: 1
~ WO-J
L =T
The printing density (i.e. image density) can be changed with the Printing
Density key on the operation panel.
Line Mode Selector changes the threshold level of VH (White level reference)
and VL (Black level reference) according to the density signals from CN
601-24 and CN 601-25.
The A/D converter converts the analog input signal to a 4-bit digital signal
using both the white reference level (l/H) and the black reference level (VL),
The following table shows the VH and VL levels that vary according to the
combination of the density signals in Line mode.
Density Density A/D Convefler
Printing Signal O Signal 1
Line Mode Selector
Density (CN601 - (CN601 - ON Channel.
W-l VL
24) 25)
Darker 2 H H ox, OY 100%
40%
Darker 1 L
H lx, IY 100%
20!Z0
Standard H
L
2x, 2Y 100?40 0.35%
~ Li hter
L L
3x 3Y 70%
0%
2-8
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