User`s guide

ACQUISITION MODES
SDK SECTION 4
Page 45
• The Accumulation Cycle Time and the Kinetic Cycle Time are fully dependent on the
exposure time and hence cannot be set via the software.
• For our Classic CCD range of cameras with frame transfer type sensors the camera can be
operated in External Trigger mode. In this mode there are no keep cleans and the external
trigger starts the "Readout" phase. The exposure time is the time between external triggers
and hence the user cannot set the exposure or cycle times.
• For our iXon range of cameras the external trigger mode is more flexible. With these
cameras the user can define the amount of time between the external trigger event
occurring and the readout starting. This can be useful in those situations where the TTL
trigger occurs before the light event you are trying to capture. As in the Classic Camera
case, no keep cleans are running and the true exposure time is the time between triggers.
However, the exposure window has moved in time by the exposure time.
• There is no need for a mechanical shutter. As the exposure time is long compared to the
time required to shift the image into the storage area and therefore, image streaking will be
insignificant.