Dalsa QuickCam, User Manual, Page: 36 / 85

QuickCam User's Manual 34
03-032-10187-04 DALSA corp.
7. Click Apply.
Example: External Sync with Pulse Generator
In this example, a variation on the previous one, pulse generators are used to
provide a periodic trigger to the camera.
The camera uses the signal to receive both the frame rate and the exposure time.
The frame rate varies, depending on the period of the signal and the exposure
time on the width of the signal.
To get a rate of 10 frames per second, the signal needs to have a period of 100 ms.
The desired exposure time is 21 ms.
First the pulse generator 0 needs to be configured to the correct value. In the
pulse generator section of the Device Features tab, shown in the following figure,
the following values would be specified:
•
Delay: 12530
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Width: 3334
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Granularity: 209
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Periodic: TRUE
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Trigger Mode: irrelevant in periodic mode
With the pulse generator 0 correctly set up, its output simply needs to be
redirected to the camera.
Here is a short summary of the outputs and inputs that would be used:
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Periodic Pulse Generator 0: I7
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EXSYNC label: Q4
The resulting program would look like this:
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Q4=I7