Camera Behavior Between Triggers; Changing Video Modes While Triggering; Figure 6.2: Relationship Between External Triggering And Video Mode Change Request - Point Grey Flea3 FL3-U3 Technical Reference Manual

Point Grey Flea3 USB 3.0 Technical Reference
6.4.4

Camera Behavior Between Triggers

When operating in external trigger mode, the camera clears charges from the sensor at the horizontal pixel clock rate
determined by the current frame rate. For example, if the camera is set to 10 FPS, charges are cleared off the sensor
at a horizontal pixel clock rate of 15 KHz. This action takes place following shutter integration, until the next trigger is
received. At that point, the horizontal clearing operation is aborted, and a final clearing of the entire sensor is
performed prior to shutter integration and transmission.
6.4.5

Changing Video Modes While Triggering

You can change the video format and mode of the camera while operating in trigger mode. Whether the new mode
that is requested takes effect in the next triggered image depends on the timing of the request and the trigger mode
in effect. The diagram below illustrates the relationship between triggering and changing video modes.

Figure 6.2: Relationship Between External Triggering and Video Mode Change Request

When operating in trigger mode 0
point A on the diagram are honored in the next triggered image. The camera will attempt to honor a request made
after point A in the next triggered image, but this attempt may or may not succeed, in which case the request is
honored one triggered image later. In trigger mode 15
image readout are honored only after a delay of one image.
Revised 9/27/2012
Copyright ©2011-2012 Point Grey Research Inc.
(page 84) or trigger mode 1
(page 85), change requests made after point A for any given
(page 84), video mode change requests made before
6 Image Acquisition
83