Cheetah Pregius Camera with 10 GigE Vision Interface – User Manual
October 8, 2020
Page
122
of
170
Rev 1.0
Fast Trigger Mode
In
Fast Trigger mode
, the exposure and readout are overlapped in a way that is similar to free-
running (untriggered mode). Fast trigger mode depends upon a constant and stable trigger
source so the camera can position the exposure period to conclude just as the previous frame
readout ends. If the trigger period varies, the exposure varies with the trigger period, and
uneven image illumination or wavering image brightness results.
An external timing pulse controls the start of the exposure when exposure control mode is
Timed
. The new exposure ends just as the readout of the current frame ends. The readout of the
next frame begins with the next trigger. If the next trigger pulse appears during the previous
trigger period, the camera ignores it.
Trigger
Exposure time
Exposure N
Exposure N+1
N
N+1
Readout N-1
Readout N
Readout time
Ignored
GenICam controls
Trigger Mode:
On
Trigger Overlap:
On
Trigger Source:
Line 1
(or Line2, Pulse Generator)
Trigger Activation:
Rising Edge
(or Falling Edge)
TriggerFilterTime, TriggerDelay, TriggerDebounceTime: –
set if applicable
Exposure Mode:
Timed
For manual exposure control:
Exposure Time:
User-specified
(Min.= 36
µ
s; Max = Readout time)
ExposureAuto:
Off
For Automatic exposure control:
ExposureAuto:
Continuous
(or Once)
Parameters of the external trigger pulse:
Trigger width:
≥ 10
µ
s
Trigger period (min) = Readout time
Fast trigger mode, Exposure control is Timed
Trigger period
≥
Readout time
Start of
Exposure
Trigger active
edge – Rising
Trigger
width
Ignored
Exposure time
