Data Translation DT3152-LS, Руководство пользователя

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Appendix D
178
Note:
If you are using an asynchronous reset camera, make sure
that the Sync Sentinel is disabled. For more information about the
Sync Sentinel, refer to
page 26 .
The DT3152-LS frame grabber board supports asynchronous reset
cameras. Asynchronous reset cameras can continuously output
frames of data and/or output a single frame of data, as follows:
• Continuous output
−
The camera continuously outputs frames of
data along with horizontal and vertical syncs. When the camera
is triggered, the current frame is reset and the camera begins to
output new frames from the top.
In this mode, you must use an external trigger with the
DT3152-LS board and the external trigger event must occur
before the first line that you want to digitize. If desired, you can
use the trigger that resets the camera to also trigger the board. For
more information about external board triggers, refer to
page 20 .
Figure 17 illustrates the continuous output of frames.
Figure 17: Continuous Output
Vertical periods
Vertical sync
Camera and
Board Trigger