CV-M9 GE
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8.5.8. Smear-less Mode
This function will reduce the unwanted smear signal from a highlighted scene when a short
exposure time is used. It works in EPS and PWC trigger modes, but a dummy readout is
performed before the active accumulation is started. It will remove the smear above the
highlighted parts in the image, but there is still smear left below highlighted areas.
The trigger leading edge will start the dummy readout. It takes 198 LVAL (8.33ms) before the
exposure starts. The exposure stops and the resulting video signal is read out. This mode will
operate with full and partial scanning and with all binning modes.
PWC Trigger Mode, without Smear-less mode
D V A L
D A T A OU T
OB
1
E f f e c t i v e L i n e s
7 L
2 3 4 5
7
6
5
7
6
4
7
6
6
7
6
8
7
6
7
7 6 8 L
6 L
5 L
Re
s
e
r v
e
d
2 L
OB
Re
se
r ve
d
L V A L
SU B
SG
F V A L
E x t . T r i g 1
E x p o s u r e
P e r i o d
7 8 8 L
t 2
t 1
M i n . : 2 L ~M a x . : 3 0V ( 2 3 7 6 0 L )
W h e n
t h e LVA L S y n c A c c um .
:
t 1 = 0 . 5
t o 1 . 5 L
,
t 2 = 1 . 5 L
W h e n
t h e LVA L A s y n c A c c um . :
t 1 = 0 . 5 L ,
t 2 = 1 . 0
t o 2 . 0 L
E EN
X E EN
Fig. 29 PWC Mode without Smear Less Mode
PWC Trigger Mode, with Smear-less Mode
M i n . : 2 0 0 L
( 1 9 8 L + 2 L ) ~M a x . : 3 0V ( 2 3 7 6 0 L )
X EEN
E EN
Sme a r L e s s Tr a n s f o r
W h e n
t h e LVA L A s y n c A c c um . :
t 1 = 0 . 5 L ,
t 2 = 1 . 0
t o 2 . 0 L
P e r i o d
E x p o s u r e
1 9 8 L
t 1
W h e n
t h e LVA L S y n c A c c um .
:
t 1 = 0 . 5
t o 1 . 5 L ,
t 2 = 1 . 5 L
t 2
7 8 8 L
E x t . T r i g 1
F VA L
SG
SUB
L VA L
R
e
s e
r v
e
d
OB
2 L
R
e
s e
r v
e
d
5 L
6 L
7 6 8 L
7
6
7
7
6
8
7
6
6
7
6
4
7
6
5
5
4
3
2
7 L
E f f e c t i v e L i n e s
1
OB
D A T A OU T
D VA L
Fig. 30 PWC Mode with Smear Less Mode
