Related Gige Vision Features; Figure 34: External Trigger Wave Diagram: Frame-On-Demand - Teledyne FLIR A68 Series User Manual

Frame-on-Demand Mode
In frame-on-demand mode, the camera sensor outputs frames when a valid trigger is
received.
External
Trigger
External Trigger
debounced
Accepted
trigger
(timestamped)
Rejected
trigger
(counter)
Frame
Acquisition
(Sensor)
(Frame-on demand)
Frame Transfer
(to Host)
(Frame-on-demand)
Note:
(1) This second detected trigger is rejected because already one
has been detected in the same frame acquisition period.
Consequently this trigger is not timestamped.
Note: The maximum frame rate period achievable using this mode is
33.233 ms; if triggers are received faster than this rate they are ignored.
In addition, since the non-uniformity correction (NUC) applied is factory-
calibrated at 30fps, triggering at a different frame rate may result in less
optimal shutterless operation. In this case, FPN correction can be applied.
If the triggered acquisition is from a cold start, the first few images might be of lower
quality as the sensor heats up. When triggering at a constant rate, the trigger
frequency must be stable enough to maintain a constant temperature; if the interval
between frames varies, the quality of the image may be affected.

Related GigE Vision Features

External trigger features are part of the Trigger Control Features and I/O Controls
categories; for complete feature descriptions refer to the Trigger Control Features
Category and I/O Controls Category sections.
84 • Features and Configuration Options
t
t
debounce
debounce

Figure 34: External Trigger Wave Diagram: Frame-On-Demand

t
debounce
(1)
t
trig-to-out
FLIR A68/A38 Series IR Camera User's Manual