Lval a-synchronous accumulation, Cv-m2 – JAI CV-M2 User Manual

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CV-M2

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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 µsec.
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 . Tr i g

0. 5L

Mi n. : 2L

SUB

104ck

52ck

Exposur e

Per i od

Vi r t ual SUB

Equi val ence

Pul se

Dat a- out del ay:

0. 5L t o 1. 5L

Exposur e del ay:

156ck( 3. 9us)

FVAL

Speci f i ed Number of LVALs

by shut t er set

Act ual Exposur e Per i od

DATA OUT

Fig. 22. LVAL a-synchronous accumulation in EPS mode