User`s manual

Basic Operation & Standard Features
3-20 BASLER A102
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DRAFT
3.6.2 Changes to the Frame Rate With AOI
In general, the maximum frame rate for the camera increases as the size of the AOI decreases.
However, the maximum frame rate can also be limited by any one of three factors:
• The amount of time it takes to transfer a captured image from the image sensor to the frame
buffer.
• The amount of time it takes to transfer an image from the frame buffer to the PC via the IEEE
1394 bus.
• The exposure time setting.
To determine the maximum frame rate for a given AOI, use your AOI and exposure time settings
to calculate a result in each of the three formulas below. These formulas take your AOI size into
account plus the other factors that can limit the frame rate. The formula that returns the lowest
value will determine the maximum frame rate for the given AOI.
Formula 1:
Formula 2:
Formula 3:
Max Frames/s
1
AOI Height 51.2281 µs ×()9941.0 µs+
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Max. Frames/s
1
Packets/frame 125 µs×
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Max. Frames/s
1
Exposure Time in µs + 181.1 µs
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