Basler ace acA1920-155, User Manual, Page: 157 / 326

AW00123404000 Image Acquisition Control
Basler ace USB 3.0 147
Guideline for Overlapped Acquisition
If you are operating the camera in such a way that frame acquisitions will be overlapped, there is
an important guideline you must keep in mind:
You must wait a minimum of 400 µs after the end of exposure for line one in frame N before you
can trigger acquisition of frame N+1. This requirement is illustrated in Figure 67
If this guideline is violated, the camera will ignore the frame start trigger signal and will declare a
Frame Start Overtrigger event.
You can avoid violating this guideline by using the camera’s Frame Trigger Wait signal to determine
when exposure can safely begin.
Frame Acquisition N Frame Acquisition N+1 Frame Acquisition N+2
= Line Exposure
= Line Readout
Time
ExFSTrig
Signal
400 µs Min.
Fig. 67: Acquisition Overlap Guideline