GigE VA Series User Manual page 32

VA GigE series
8.3.3.1 Exposure Modes
If you are triggering the start of frame acquisition with an externally generated trigger signal, two exposure
modes are available: Timed and Trigger Width.
Timed Exposure Mode
When the Timed mode is selected, the exposure time for each frame acquisition is determined by the value of
the camera's Exposure Time parameter. If the camera is set for rising edge triggering, the exposure time starts
when the external trigger signal rises. If the camera is set for falling edge triggering, the exposure time starts
when the external trigger signal falls. Figure 8.3 illustrates timed exposure with the camera set for rising edge
triggering.
Figure 8.3 Timed Exposure Mode
Note that if you attempt to trigger a new exposure start while the previous exposure is still in progress, the trigger
signal will be ignored, and an Over-trigger event will be generated.
Figure 8.4 Trigger Overlapped with Timed Exposure Mode
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