Guppy PRO Technical Manual
V4.1.2
123
Controlling image capture
Global shutter (CCD cameras only)
Shutter modes
The cameras support the SHUTTER_MODES specified in IIDC V1.31. For all
models (except Guppy PRO F-503) this shutter is a global shutter; meaning that
all pixels are exposed to the light at the same moment and for the same time
span.
Pipelined
Pipelined means that the shutter for a new image can already happen, while
the preceding image is transmitted.
Continuous mode
In continuous modes the shutter is opened shortly before the vertical reset
happens, thus acting in a frame-synchronous way.
External trigger
Combined with an external trigger, it becomes asynchronous in the sense that
it occurs whenever the external trigger occurs. Individual images are recorded
when an external trigger impulse is present. This ensures that even fast moving
objects can be grabbed with no image lag and with minimal image blur.
Software trigger
Guppy PRO cameras know also a trigger initiated by software (status and
control register 62Ch on page 206 or in SmartView by Trig/IO tab, Stop trigger
button).
Camera I/O
The external trigger is fed as a TTL signal through Pin 4 of the camera
I/O connector.
