"ExposureMode = Timed"
If an external trigger signal occurs (e.g. high or low), the sensor will start to expose and readout one
image. Now, if the trigger signal is still available, the sensor will start to expose and readout the next
image (see figure 12, upper part). This will lead to an acquisition just like using continuous trigger.
Figure 3: External Trigger with CMOS sensors
If you want to avoid this effect, you have to adjust the trigger signal. As you can see in figure 3
(lower part), the possible period is small.
Example
External synchronized image acquisition (high active)
Trigger modes
OnHighLevel:
The high level of the trigger has to be shorter than the frame time. In this case, the
sensor will make one image exactly. If the high time is longer, there will be images
with the possible frequency of the sensor as long as the high level takes. The first
image will start with the low-high edge of the signal. The integration time of the
exposure register will be used.
♦
OnLowLevel:
The first image will start with the high-low edge of the signal.
♦
•
Erase, exposure and readout
All pixels are light sensitive at the same period of time. The whole pixel core is reset simultaneously
and after the exposure time all pixel values are sampled together on the storage node inside each
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