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7.3
Acquisition Control
This section deals with all the Exposure, Line period and synchronisation modes
Synchronisation Mode
(
TriggerPreset
) : Timed or Triggered, it defines how the grabbing is synchronized
.
This command is available in the CommCam “Acquisition Control” section :
Read function : “
r sync
”;
Returned by the camera :
“0” : Internal Line Trigger with Exposure time Internally Controlled (Free Run). Not available when
Sensor mode is set in “4S” (whatever the firmware version)
“1” : External Trigger with Exposure Time Internally Controlled. Available also when Sensor mode
is set in “4S”.
“2” : External Trigger with maximum Exposure time
“3” : One External with Exposure Time Externally Controlled. The same Trigger signal defines the
line period and its low level defines the exposure time. Available also when Sensor mode is set in
“4S”
“4” : Two External Triggers with Exposure Time Externally Controlled : CC2 defines the start of
the exposure (and also the start Line) and CC1 defines the Stop of the exposure. Not available
when Sensor mode is set in “4S”
“5” : Internal Line Trigger with maximum Exposure Time
Write function : “
w sync
” <value>
The Timing diagrams associated to each Synchronization mode and the Timing values
associated are detailed in the APPENDIX B of this document.
Exposure time
(
ExposureTime
): Defines the exposure time when set in the Camera. This command is
available in the CommCam “Acquisition Control” section :
Read function : “
r tint
”;
Returned by the camera : Integer from 15 to 65535 (=1,5µs to 6553,5µs by step o 0,1µs)
Write function : “
w tint
” <value> ;
This value of exposure time is taken in account only when the synchronisation mode is “free run” (0) or “Ext Trig
with Exposure time set” (1). Otherwise it’s ignored.
Due to the limitation of the timing pixel inside the sensor, the Exposure time has to be set by
taking in account the limitation detailed in the APPENDIX B of this document.
The Minimum exposure time which can be set is
1,5µs
Line Period
(
LinePeriod
) : Defines the Line Period of the Camera in Timed mode
.
This command is
available in the CommCam “Acquisition Control” section :
Read function : “
r tper
”;
Returned by the camera : Integer from 1 to 65536 (=0,1µs to 6553,6µs by step o 100ns)
Write function : “
w tper
” <value> ;