Instruction manual
Guppy Technical ManualV7.4.0
141
Controlling image capture
Controlling image capture
Global shutter (CCD cameras only)
Shutter modes The cameras support the SHUTTER_MODES specified in IIDC V1.3. For all Guppy
models (except Guppy F-036/503) 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.
Continuous mode In continuous modes the shutter is opened shortly before the vertical reset hap-
pens, 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.
Camera I/O The external trigger comes in as a TTL signal through Pin 4 of the camera
I/O connector.