AT-030MCL
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The shutter speed for each operation mode is shown below.
Mode
Read Out
Minimum shutter speed
Maximum shutter
speed
Continuous
Edge Pre-select
Full
Partial
8.3850 µs at PE=0(1/130,000s)
16.24µs x 511L=1
Frame
(8.298 ms) (Note1)
V binning
8.4500 μs at PE=0(1/130,000s)
Pulse Width
Full
Partial
16.24 µs x 2L+8.412( 0.5L)=
40.890 µs
（≒
1/24,456s
）
(Note2)
240 Frames
( 2 seconds )
V Binning
20.07 µs x 2L + 8.460µs(0.5L)=
46.0504µs
（≒
1/20,574s
）
(Note2)
Fast PWC
Full
Partial
2.3 µs (1/434,900s)
69 µs
V Binning
8.7 µs (1/119,000s)
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.
Fig.13. Auto-detect LVAL sync/async accumulation
FVAL
(1)
(3)
(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 ”.
(2)
External Trigger
+/- 1 LVAL
(3) In this period, camera executes trigger immediately ( no delay).
