Image Acquisition Control AW00089317000
136 Basler ace GigE
Exposure Active on Rolling Shutter Cameras
Valid for
acA1920-25 and acA2500-14
acA1300-60 and acA1600-60: Only valid if they are operated in the rolling shutter mode
Cameras with a rolling shutter imaging sensor can provide an "exposure active" (ExpAc) output
signal. On these cameras, the signal goes high when exposure for the first line in a frame begins
and goes low when exposure for the first line ends as shown in Figure 74.
Selecting the Exposure Active Signal as the Source Signal for the Output Line
The exposure active output signal can be selected to act as the source signal for output line 1.
1. Use the Line Selector to select output line 1.
2. Set the value of the Line Source Parameter to the exposure active output signal.
You can set the Line Selector and the Line Source parameter value from within your application
software by using the Basler pylon API. The following code snippet illustrates using the API to set
the selector and the parameter value:
Camera.LineSelector.SetValue( LineSelector_Out1 );
Camera.LineSource.SetValue( LineSource_ExposureActive );
You can also use the Basler pylon Viewer application to easily set the parameters.
To select a source signal for the output line:
Frame Acquisition N Frame Acquisition N+1 Frame Acquisition N+2
= Line Exposure
= Line Readout
Time
Exposure
Active
Signal
Fig. 74: Exposure Active Signal on Cameras with a Rolling shutter