BOBCAT Hardware User’s Manual
Imperx, Inc.
Rev. 1.0
6421 Congress Ave.
5/4/2010
Boca Raton, FL 33487
+1 (561) 989-0006
82 of 212
the trigger pulse duration or by internal exposure register. The number of frames
captured after each trigger pulse can be programmed. This completes the current
trigger cycle and the camera idles until the next trigger pulse.
CAUTION NOTE
The time interval between the trigger pulses must be greater than the combined
exposure and frame time. If the time between the triggers is shorter, the frame read-
out cycle will be interrupted and part of the frame will be lost.
Only if the main strobe is enabled
VCCD
SHUTTER
TRIGGER
EXPOSURE
FVAL
DATA
STROBE
First Frame Exposure
DATA Out
Only if the trigger strobe is enabled
Figure 2.14 – Standard triggering timing
B.
Fast Synchronized Triggering – Rapid Capture
Fast synchronized triggering (a.k.a. rapid capture) provides the ability to run the
camera in a slave mode, allowing several cameras to be synchronized with an
external master trigger signal. This mode also enables the camera to run close to its
original frame rate. If this mode is enabled, the camera idles and waits for a trigger
signal to come from the selected. Upon receiving the trigger signal, the camera
starts integration until the next trigger is received. Then the information is
transferred to the registers and read out. During this time the next frame is exposed
– Figure 2.15. In this mode the camera exposure can be controlled with the internal
shutter or with the trigger pulse width. If the shutter is not used, the camera
exposure time will be equal to the time between the trigger pulses (trigger period).
If the internal shutter is used the exposure control slider sets the exposure – Figure
2.15. The number of frames captured is set to 1 and cannot be changed.
