Image Acquisition Control
Basler scout 99
For more information about the electrical requirements for input lines 1 and 2, see Section 7.7.1 on
page 84.
For more information about determining the maximum allowed frame rate, see Section 7.13 on
page 143 and Section 7.14 on page 148.
7.5.3.2 Exposure Modes
If you are triggering the start of frame acquisition with an externally generated frame start trigger
(ExFSTrig) signal, two exposure modes are available: timed and trigger width.
Timed Exposure Mode
When timed mode is selected, the exposure time for each frame acquisition is determined by the
the camera’s exposure time parameters. If the camera is set for rising edge triggering, the exposure
time starts when the ExFSTrig signal rises. If the camera is set for falling edge triggering, the
exposure time starts when the ExFSTrig signal falls. The following figure illustrates timed exposure
with the camera set for rising edge triggering.
Fig. 45: Timed Exposure with Rising Edge Triggering
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 a Frame Start Overtrigger event will be generated.
This situation is illustrated below for rising edge triggering.
Fig. 46: Overtriggering with Timed Exposure
This rise in the trigger signal will be
ignored, and a Frame Start Overtrigger
event will be generated
Exposure
(duration determined by the
exposure time parameters)
ExFSTrig Signal
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