Oce 3121, Technical & Service Manual

Page: 292 / 908

516 TSM Océ 3121 Functional description
Repeat
■
Principle
When reading data for a single scan
from RAM, a start address (address
S) and an end address (address E) are
specified. Then, reading is started at
address S. When address E is
reached, a return is made to address
S. A specific image is repeated by re-
peating these operations.
Slant
■
Principle
When reading data for a single scan
from RAM, the start address is shift-
ed for each reading. Thereby slanting
the image.
a
a a a a
Main scanning direction
< Original >
< Copy >
S
ub scanning direction
Address S
Address E
<Document>
Forward scanning --> direction
R
ev
er
se
s
c
a
n
n
ing
di
re
c
-
<copy>
Address S
Address E
Im
a
g
e Si
gna
l
1 pixel (1 byte)
Reading
a b c
a b c
a b c
Main scanning
direction
< Original >
< Copy >
S
ub scanning direction
Forward scanning --> direction
<Document>
R
eve
rs
e s
c
a
n
n
ing
di
re
c
-
<copy>
Im
a
g
e
Si
gna
l
Address
1 pixel (1 bye)
Reading
1st line
2nd line
3rd line
4th line
Address