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10.5. Trigger input and exposure start timing
Triggeroverlap
This function is used to set whether the trigger can be accepted during the data
readout in cases where FrameStart trigger or ExposureStart trigger are "ON".
OFF:
ReadOut:
Note: During synchronous reset, a jitter of up to 1 LVAL will occur from trigger input
to exposure start and end. During asynchronous reset, there is no jitter.
The minimum trigger interval is shown as follows. The synchronous reset shows the
shorter interval.
Mode
Synchronous reset
Asynchronous reset
Note: The above table is based on Exposure mode Timed, Trigger ON.
.5.1 Synchronous reset timing
10
10.5.1.1 In the case of Expsoure mode = Timed, Trigger = ON (Full frame)
Ext. Trigger
FVAL
LVAL
Exposure
Active
Exposure Period
DATA out
10.5.1.2 In the case of Expsoure mode = Trigger width, Trigger = ON (Full frame)
AT-140GE
While the CCD reads out the data, the trigger cannot be accepted.
This works as LVAL asynchronous operation.
While the CCD reads out the data, the trigger can be accepted.
In this mode, if the trigger is input during CCD readout, it works as
LVAL synchronous and if the trigger is input while the CCD is not
reading out, it works as LVAL asynchronous.
This is the same behaviour as LVAL SYNC/ASYNC auto detection.
Exposure Period
Exposure Delay
t1+1L( M ax)
Fig.40
Synchronous reset （Timed）
Fig.41 Synchronous reset (Trigger width)
- 54 -
Minimum trigger interval
1054L + 3L
Maximum exposure time + 1054L + 3L
2. 5L
Data Out Delay
8.5L
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