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108 Appendix B: Camera interface reference
Variable line scan rate with frame trigger mode
In variable line scan rate with frame trigger mode, the frame grabber receives two
external triggers: a line trigger and a frame trigger. The line trigger is continuous;
however, it has a variable rate. The line trigger tells the frame grabber to send an
exposure pulse to the camera to start reading out a line. When the frame trigger
occurs, a specified number of lines are acquired. The frequency of the external
trigger signal determines the line scan rate and must be greater than the exposure
Y time and the line transfer time.
The signals used in this mode are external line and frame trigger signals (both
R provided to the frame grabber); an exposure signal (supplied by the frame grabber
PRE19LIMMAINYA2005 to the camera); asynchronizationsignal; anda video output.
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