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Piranha4 8k Color Camera User's Manual
03-032-20274-00
Teledyne DALSA
Trigger Modes
The camera’s image exposures are initiated by a trigger event. The trigger event is either a
programmable internal signal used in free running mode, an external input used for
synchronizing exposures to external triggers, or a programmed function call message by the
controlling computer. These triggering modes are described below.
Internal trigger (trigger disabled):
The camera free-running mode has a
programmable internal timer for line rate and a programmable exposure period.
External trigger (trigger enabled):
Exposures are controlled by an external
trigger signal. The external trigger signal is the Camera Link control line CC1.
Exposure Controls
Exposure Control modes define the method and timing of how to control the sensor
integration period. The integration period is the amount of time the sensor is exposed to
incoming light before the video frame data is transmitted to the controlling computer.
Exposure control is defined as the start of exposure and exposure duration.
The start of exposure can be an internal timer signal (free-running mode) or an
external trigger signal.
The exposure duration can be programmable (such as the case of an internal timer)
or maximum. In the latter case, the camera will maximize the exposure duration for
the programmed line rate.
The camera can grab images in one of three ways. You determine the three imaging modes
using a combination of the Exposure Mode parameters (including I/O parameters), Exposure
Time and Line Rate parameters.
Description
Line Rate
Exposure Time
Trigger Source
(Sync)
Internal line rate and exposure time
Internal, programmable
Internal programmable
Internal
Internal line rate and max exposure
Internal, programmable
maximum
Internal
External line rate (EXSYNC) and
exposure time
Controlled by EXSYNC
pulse
Internal programmable
External
External line rate (EXSYNC) and max
exposure time
Controlled by EXSYNC
pulse
maximum
External
Figure 16. Exposure controls
The parameters used to select the imaging modes—trigger sources (sync), exposure time,
and line rate—are grouped together as the Camera Controls.
Camera Controls
Parameter
Description
Line Rate (in Hz)
Camera line rate in Hz. Only available when the start line trigger parameter is disabled
(Trigger Mode off).
Exposure Mode
Set the operation mode for the camera’s exposure.
Timed or Maximum.