Instruction manual
Guppy Technical ManualV7.4.0
178
Video formats, modes and bandwidth
The frame rates in video modes 0 to 2 are specified, and settings are fixed by IIDC
V1.3.
Frame rates Format_7
In video Format_7 frame rates are no longer fixed.
Frame rates may be further limited by bandwidth limitation from the IEEE 1394
bus.
Details are described in the next chapters:
• Max. frame rate of CCD (theoretical formula)
• Diagram of frame rates as function of AOI by constant width: the curves
describe RAW8
• Table with max. frame rates as function of AOI by constant width
Note
• If the cameras are operated with an external trigger the
maximum trigger frequency may not exceed the highest
continuous frame rate, thus preventing frames from
being dropped or corrupted.
• IEEE 1394 adapter cards with PCILynx™ chipsets have a
limit of 4000 bytes per cycle.
Note
• Different values apply for the different sensors.
• Frame rates may be further limited by longer shutter
times and/or bandwidth limitation from the IEEE 1394
bus.