Instruction manual

Guppy PRO Technical ManualV4.1.0

119

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 pix-

els 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 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.

Software trigger Guppy PRO cameras know also a trigger initiated by software (status and control

Camera I/O The external trigger is fed as a TTL signal through Pin 4 of the camera

I/O connector.