Triggering
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Mako U Technical Manual V1.1.3
Trigger signal flow
The following diagram shows the exposure of a frame started by an external signal.
High levels show the active state of a signal. Proportions and dependencies are
simplified to show the basic signal flow. Signal 1 starts Cycle 1.
Trigger latency
Trigger latency is the time delay between the
FrameStart trigger and the start of
exposure. Trigger latency consists of:
•
Jitter and delay of exposure start
•
TriggerDelay
Figure 40: Trigger signal flow
Term
Description
External signal
Electrical trigger signal starting the signal flow
ExposureActive
Exposing a frame
ReadoutActive
Reading out a frame, high when the image sensor is reading out data
FrameTriggerWait
Waiting for a trigger
AcquisitionActive
Acquiring of frames, needs to be high to start triggering
High when the camera image sensor is either exposing, reading out data, or
waiting for a trigger
Table 43: Legend for Trigger signal flow
Term
Description
Exposure start jitter
Deviation from the average periodical signal time
Time range mainly caused by sensor line synchronization
Exposure start delay
Deviation from the average periodical signal time
Time range caused by camera internal timing
TriggerDelay
Value set by the user to extend the trigger latency
Table 44: Trigger latency, components
External signal
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FrameTriggerWait
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Frame 1
1
2
Cycle 1
Frame 2
Frame 2
Frame 1
