JAI AT-140GE - Manual (Page 47)

AT-140GE
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9.7.4 Reset Continuous Trigger (RCT)
The RCT mode operates like EPS (Edge Pre-select) mode with smearless function. An
external trigger pulse will immediately stop the video read out, reset and restart the
exposure, then operate as normal mode until the next trigger. After the trigger pulse is
input, a fast dump read out is performed. In the AT-140GE, this period is 16.04ms which is
352L. The exposure time is determined by the pre-set shutter speed. If no further trigger
pulses are applied, the camera will continue in normal mode and the video signal is not
output. The fast dump readout has the same effect as “smearless readout”. Smear above
bright areas is reduced for the trigger frame. The reset continuous trigger mode makes it
possible to use triggering in conjunction with a lens with video controlled iris.
RCT mode is available only in LVAL asynchronous.
To use this mode:
Set function:
Exposure mode RCT
Pixel format RGB 8, 10V1, 10V2
Partial scan Fast Dump ON, ROI
Vertical binning Binning vertical ON
Shutter mode Programmable, Exposure Time Abs
GPIO settings
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 Async Smearless time(265L) + Maximum exposure time +1252L + 3L
Note: 1) On the above table, 1252L 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.47 RCT mode
Note: In this mode, if the next trigger is input while the data is read out, the data can be immediately transferred.
The minimum trigger interval should be kept.
D V A L
D A T A O U T
Co n t i n u o u s Da t a T r i g g e r e d Da t a Co n t i n u o u s Da t a
L V A L
S U B
S G
F V A L
E x t . T r i g
Camer a Li nk
Hi g h S peed
Tr a ns f er
Mi n . 2 L
E E N
E x p o s u r e
P e r i o d
X E E N
(Hirose 12pi n)
Smear less (352L)
1L=1958 Clock (45.58 μs)