CV-M2
- 15 -
6.2.8. LVAL a-synchronous accumulation
With LS=1, the accumulation will start immediately after the trigger leading edge.
The exposure start delay will be 156 clk. pulses after the trigger. It is 3.9 ยตsec.
In EPS mode the exposure stops 0.5 L after the selected shutter time, (in number of LVAL).
In PWC mode the exposure stops 0.5 L after the trigger trailing edge.
A new trigger must not be applied before the previous frame is read out. (FVAL is low).
The minimum trigger interval should be longer than the exposure time + 1 FVAL+3 LVAL.
Important notes on using this mode.
In LVAL a-synchronous PWC mode there is no exposure jitter.
LVAL
Ext.Trig
0.5L
Min.:2L
SUB
104ck
52ck
SG
Exposure
Per i o d
Vi r t ua l SUB
Equival enc e
Pul se
Data-out delay :
0.5L to 1.5L
Exposure del ay :
156ck(3. 9us )
FVAL
Specif i ed Number of LVALs
by shutter set
Actual Exposur e Peri od
DATA OUT OB OB
Fig. 22. LVAL a-synchronous accumulation in EPS mode
LVAL
Ext.Trig
0.5L
SUB
104ck
52ck
SG
Exposure
Per i o d
Vi rt u a l SUB
Equival enc e
Pul se
Data-out del ay:
0.5L t o 1. 5L
Exposure del ay:
156ck(3. 9us )
FVAL
Actual Exposure Per i od
DATA OUT OB OB
Fig. 22A. LVAL a-synchronous accumulation in PWC mode