Figure 4.

An example showing the differences between signal trains for the (a) physical and (b) virtual enable scheme operation. The external enable signal (blue) is identical for the two modes of operation. The camera triggers (red) are provided by the internal auto trigger mode (see section on trigger modes). Only frames with an active frame store bit (green) will be added to the data ring buffer. Note the shift in frame timing between the physical and the virtual enable scheme operation. Even though the second and third gate have the same length, the number of accepted trigger pulses is different (three and two pulses, respectively) in the virtual enable scheme due to the timing jitter of the gating signal with respect to the fixed frequency trigger signal. Also shown are the frames selected for preview (black), assuming a preview strategy displaying every fourth frame acquired by the camera.