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The shutter speed for each operation mode is shown below.
Mode
Read Out
Continuous
Full
Edge Pre-select
Partial
V binning
Pulse Width
Full
Partial
V Binning
Fast PWC
Full
Partial
V Binning
Note1: If V-Binning and partial scan modes are used, the maximum shutter speed is limited
by the programmable exposure value of total line numbers in one frame.
Note2: In Pulse Width mode, the minimum trigger pulse width requires more than 2LVAL.
Auto exposure
AT-030MCL has an automatic shutter function which sets the video at an appropriate level
depending on illumination.
7.2.4 Auto-detect LVAL-sync / a-sync accumulation
This function replaces the manual setting found in older JAI cameras. Whether accumulation
is synchronous or asynchronous in relation to LVAL depends on the timing of the trigger input.
When a trigger is received while FVAL is high (during readout), the camera works in LVAL-
synchronous mode, preventing reset feed-through in the video signal. There is a maximum
jitter of one LVAL period from issuing a trigger and accumulation start.
When a trigger is received during FVAL low, the camera works in LVAL-asynchronous mode (no
delay) mode.
This applies to both Edge Pre-select (EPS) trigger mode and Pulse Width Control (PWC) trigger
mode.
External Trigger
FVAL
(1) In this period camera executes trigger at next LVAL (prevents feed-through noise)
(2) Avoid trigger at FVAL transition (+/- LVAL period), as the function may randomly
switch between " next LVAL " and " immediate ".
(3) In this period, camera executes trigger immediately ( no delay).
AT-030MCL
Minimum shutter speed
8.3850 µs at PE=0(1/130,000s)
8.4500 μs at PE=0(1/130,000s)
16.24 µs x 2L+8.412( 0.5L)=
40.890 µs （≒1/24,456s）(Note2)
20.07 µs x 2L + 8.460µs(0.5L)=
46.0504µs （≒1/20,574s）(Note2)
2.3 µs (1/434,900s)
8.7 µs (1/119,000s)
(1)
Fig.13. Auto-detect LVAL sync/async accumulation
(2)
(3)
+/- 1 LVAL
- 15 -
Maximum shutter
speed
16.24µs x 511L=1
Frame
(8.298 ms) (Note1)
240 Frames
( 2 seconds )
69 µs
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