JAI AT-140GE - Manual (Page 43)

AT-140GE
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9.7.2 Edge Pre-select Trigger Mode (EPS)
An external trigger pulse initiates the capture, and the exposure time (accumulation time) is
the fixed shutter speed set by programmable exposure or Exposure Time Abs. The
accumulation can be automatically set either LVAL synchronous or LVAL asynchronous in
relation to FVAL and trigger timing.
The resulting video signal will start to be read out after the selected shutter time.
For timing details, refer to fig35 . through fig43 .
To use this mode:
Set function: Exposure mode Edge pre-select
Pixel format RGB8, 10V1, 10V2
Partial scan Fast dump ON, ROI
Vertical binning Binning vertical ON
Shutter mode Programmable, Exposure Time Abs
GPIO setting
Important notes on using this mode
 Active Trigger pulse >2 LVAL to <1 FVAL
 Minimum Trigger interval is shown in the following table.
Mode Minimum trigger interval
LVAL Sync 1056L + 3L
LVAL Async Exposure time + 1056L + 3L
Smearless is ON Smearless time(352L) + Maximum exposure time +1056L + 3L
Note: 1) On the above table, 1056L is FVAL interval on normal continuous mode
2) In the vertical binning mode, 1L is different from the normal scanning. So, the minimum
trigger interval will be different.
Fig.41 Edge Pre-select.