CV-M9 GE
- 32 -
8.5.5. Pulse Width Control Trigger Mode
In this mode the accumulation time is equal the trigger pulse width. Here it is possible to have
long time exposure. The maximum recommended time is < 2 second.
The accumulation can be LVAL synchronous or LVAL a-synchronous.
The resulting video signal will start to be read out after the trigger rising edge.
For timing details, refer to fig. 16.through fig. 22. and fig. 28.
To use this mode:
Set function:
Trigger mode
PWC
Scanning
Full
,Partial
Vertical binning
ON / OFF
Accumulation
LVAL sync / LVAL a-sync
Other functions and settings
Input:
Ext. trigger.
Gigabit Ethernet or 12-pin Hirose
Important notes on using this mode
Trigger pulse width >2 LVAL to <1 second.
Minimum trigger interval in synchronous accumulation mode
In case the exposure time is less than 1 FVAL ( 792L):
≥
(1 FVAL(792L) + 1 LVAL)
In case the exposure time is more than or equal to 1 FVAL ( 792L):
≥
( Exp. time + 2 LVAL )
Minimum trigger interval in a-synchronous accumulation mode
≥
(exposure time + 1 FVAL + 2 LVAL).
Minimum trigger interval in Smear-less ON:
≥
(Smear-less time (198L) + 1FVAL(792L) + 2 LVAL
In PWC mode and Smear-less ON, the actual exposure time is (Trigger duration – Smear-
less time (198L) ). If the trigger duration is less than 198L, the exposure time of the
output video is 1/50,000s.
7L
5L
768L
6L
2L
1
E f fe c t i ve L ine s
7L
2 3 4 5
76
5
76
4
76
6
76
8
76
7
5L
OB
DVA L
DA TA OU T
M in :2L~Ma x :30V (23760L )
788L
t1
When the LVAL S yn c A c cum . : t1=0 .5 to 1 .5L , t2=1 .5L
When the LVAL A s yn c A c cum . : t1=0 .5L , t2=1 .0 to 2 .0L
t2
LVA L
SUB
SG
EEN
OB
Re
se
r ve
d
Re
se
r ve
d
XEEN
(H irose 12p in)
1L = 1420C lock (42 .07us)
E x t . T r i g 1
FVA L
P e r i o d
E x p o s u r e
Fig. 28. Pulse width control. LVAL synchronized.
