Photon Focus CameraLink MV1-D1280, Руководство пользователя

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5 Functionality
The trigger pulse from the internal camera control starts also the strobe control state machines.
The strobe can be delayed by t
strobe − delay
with an internal counter which can be controlled by
the customer via software settings. The strobe offset delay t
strobe
−
delay
results then from the
synchronous design of the FPGA state machines. A second counter determines the strobe
duration t
strobe
−
duration
(strobe-duration). For a robust system design the strobe output is also
isolated from the camera electronic which leads to an additional delay of t
d
−
iso
−
output
Table 5.7
gives an overview over the minimum and maximum values of the parameters.
5.2.4 Trigger Delay
The trigger delay is a programmable delay in milliseconds between the incoming trigger edge
and the start of the exposure. This feature may be required to synchronize to external strobe
with the exposure of the camera.
5.2.5 Burst Trigger
The camera includes a burst trigger engine. When enabled, it starts a predefined number of
acquisitions after one single trigger pulse. The time between two acquisitions and the number
of acquisitions can be configured by a user defined value via the camera software. The burst
trigger feature works only in the mode "Camera controlled Exposure Time".
The burst trigger signal can be configured to be active high or active low. When the frequency
of the incoming burst triggers is higher than the duration of the programmed burst sequence,
then some trigger pulses will be missed. A missed burst trigger counter counts these events.
This counter can be read out by the user.
The timing diagram of the burst trigger mode is shown in Fig. 5.14. The timing of the
"external trigger pulse input" until to the "trigger pulse internal camera control" is equal to
the timing in the section Fig. 5.13. This trigger pulse then starts after a user configurable burst
trigger delay time t
burst
−
trigger
−
delay
the internal burst engine, which generates n internal
triggers for the shutter- and the strobe-control. A user configurable value defines the time
t
burst − period − time
between two acquisitions.
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