Dalsa Linea Lite GigE Series User Manual

40 • Camera Performance and Features Linea Lite GigE Series Camera
Multi-Row Mode
In Multi-Row mode, two sensor rows are synchronized and output per input line trigger. This
enables processing of the synchronized image rows by the host system. The output image frame
will consist of alternating sensor rows starting with row one.
Related GigE Vision Features
Feature related TDI Mode part of the Sensor Control category.
Acquiring Images: Triggering the Camera
Linea Lite GigE line exposures are initiated by a trigger event. A trigger event is only generated
when a grab is active; when not grabbing no trigger events are generated. The Linea Lite can
acquire images using its own internal trigger (free-running mode) or using an external trigger
(EXSYNC) with several options for the trigger source.
A trigger can be:
• the camera's programmable internal clock used in free running mode
• an external input used for synchronizing exposures to external triggers
• a programmed function call message by the controlling computer.
These triggering modes are described below.
• Free running — (Trigger Mode
= Off): The Linea Lite free-running mode has programmable
internal timers for line rate / exposure period. In free-running mode, the Acquisition Line Rate
feature specifies the line rate, in Hz. The maximum line rate is determined by the Exposure
Time feature. The Internal Acquisition Frames Per Second (FPS) feature returns the FPS for the
specified Frame rates are determined by the image buffer Height feature.
• External trigger (Trigger Mode = On): Exposures are controlled by an external or internal
trigger signal where the specific input line or source is selected by the Trigger Source feature.
External signal inputs have a time programmable debounce circuit.
• Virtual frames: For any exposure type the virtual frame is the number of lines per frame as
set by the Height feature, available in the Image Format Category
.
The Trigger Mode feature determines if the cameras uses free-running mode (Trigger Mode = Off)
or an external trigger (Trigger Mode = On).
Note: In case the trigger frequency exceeds the allowable line rate, the camera
will buffer one trigger.
• If the Acquisition Line Rate is reduced and / or frame buffer Height is increased, the value of
the Image Timeout feature (part of the GigE Vision Host Control category) may require
increasing.
• If error messages are shown in the Output Messages pane, try increasing the value of the Linea
Lite GigE Interpacket Delay
feature available from the GigE Vision Transport Layer Category
group in CamExpert. An increase from default may correct errors with NIC interfaces that do
not have adequate performance. For more information, refer to Teledyne DALSA Network
Imaging Package for Sapera LT Optimization Guide, available through the Start menu under
Teledyne DALSA.

Dalsa Linea Lite GigE Series Specifications

General

Brand	Dalsa
Model	Linea Lite GigE Series
Category	Digital Camera
Language	English