JAI AD-131GE, Руководство пользователя

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AD-131GE
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10.6.1 The exposure timing when the trigger pulse is input
10.6.1.1 Auto-detect LVAL-sync / async accumulation
This function replaces the manual setting found in older JAI cameras. Whether accumulation is
synchronous or asynchronous in relationship to LVAL depends on the timing of the trigger input.
When a trigger is received while FVAL is high (during readout), the camera works in
LVAL-synchronous mode, preventing reset feed-through in the video signal. There is a
maximum jitter of one LVAL period from issuing a trigger to accumulation start.
When an external trigger is received during FVAL low, the camera works in LVAL-asynchronous
(no delay) mode.
This applies to both Pre-Select (PS) trigger and Pulse Width trigger (PW) modes.
10.6.1.2 Relation between the external trigger mode and LVAL Sync/Async
：
Exposure Mode
(JAI)
Smear
Less
Enable LVAL SYNC LVAL
ASYNC
Edge pre-select False
○ ○
True
× ○
Pulse-width
control False
× ○
True
× ○
RCT Mode
-
× ○
Sequential
EPS trigger False
×
(Note:1)
○
True
× ○
Delayed readout
EPS trigger False
○ ○
True
× ○
Delayed readout
PWC trigger False
× ○
True
× ○
PIV Mode 1,2,3,4
― × ○
Note 1: In the sequence trigger mode, each entry in the sequence can be set to its own
exposure time and gain. Therefore, the LVAL sync operation does not function.
Please arrange for the trigger input timing to occur during FVAL LOW (LVAL Async).
Ext. trigger
FVAL
(1) (3)
(1) In this period camera executes trigger at next LVAL (prevents feed-through noise)
(2) Avoid trigger at FVAL transition (+/- 1 LVAL period), as the function may randomly switch
between "next LVAL" and "immediate".
(3) In this period camera executes trigger immediately (no delay)
(2)
Fig. 40 Auto-detect LVAL sync /a-sync accumulation