LYNX Manual RA02
VCCD
SHUTTER
TRIGGER
EXPOSURE
FVAL
DATA
STROBE
First Frame Exposure
DATA Out
Figure 2.38 - Standard Triggering Timing
2.5.2
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 hardware or software mode is enabled
in rapid capture mode, the camera idles and waits for a trigger signal to
come from the selected source (the external connector or CC1). 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 2.39. In this
mode the camera exposure cannot be controlled with the shutter.
CAUTION NOTE
1.
The time interval between the trigger pulses must be greater than the
corresponding camera frame duration – refer to section 2.1.4 Timing
Diagrams.
2.
If the interval between the trigger pulses is greater than 2 or 3 times
the standard frame time, it is recommended that the standard triggering
option be used.
3.
In rapid capture option there is no shutter pulse associated with each
trigger, so the very first frame may be over-exposed.
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