Canon 1130 Service Manual page 430

Decoder X
L= (n-1)
1......n-1
Vn-1
COPYRIGHT © 2002 CANON INC.
CHAPTER 9 EXTERNALS / AUXILIARY MECHANISMS
Amplifi-
cation
Decoder Y
CPU
Figure 9-601
X
: line interval
n
n+1
Vn+1
Figure 9-602
CANON CLC1100/1130/1150/1160/1180 REV.1 JAN. 2000 PRINTED IN JAPAN (IMPRIME AU JAPON)
Peak
hold
Editor controller PCB
Output (to copier)
Detection
Applies pulses to electrode wire
(1, ..., n-1, n, n+1).
Voltage is maximum Vn at nth
electrode wire.
L : (n-1)
: line interval.
Vn-(Vn-1)
Vn-(Vn+1)
Computes x from data table.
Obtains L x mm.
+: between n and n+1.
-: between n and n-1.
A/D
conversion
Vn-1
Vn
Vn+1
9-15