AT-200CL
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7.2.2 Vertical Binning (VB)
Vertical Binning mode is a function where the signal charges from 2 adjacent (vertical) pixels
are added together and read out as one pixel. Binning results in half vertical resolution but
higher frame rate and sensitivity. The charge accumulated in 2 adjacent lines is added
together in the horizontal CCD register. This is done by providing two pulses to the vertical
CCD register for each line read out. Vertical binning cannot be used together with partial
scanning.
Fig. 15. Vertical Binning
Setting
Effective/total
Horizontal
Frequency
Frame rate
Off (No V Binning))
1236 /1252
25.432 KHz
20.31 frames/sec.
2:1 V Binning
618 / 628
22.563 KHz
35.93 frames /sec.
7.2.3 Electronic shutter (SM)
The AT-200CL has the following shutter modes.
Pre-set shutter(SH)
The setting command is from SH=0(OFF) to SH=11
（
1/51,000
）
OFF(1/20),1/60,1/100,1/120,1/250,1/500,1/1000,1/2,000,1/4,000,1/7,000,1/17,000 and
1/51,000s
Note: The actual exposure uses the programmable exposure (PE) method. When the camera receives a
pre-set shutter value, it is converted to a programmable value inside the camera. So, the actual
exposure might be slightly different from the pre-set value.
Programmable Exposure (PE)
The setting command is PE and the exposure time can be controlled from 0L to 1252L in 1
LVAL units (39.32µs). Calculating actual shutter speed requires adding 0.5L to the
setting value. This is because there is 0.5L overhead.
The resulting range is from 0.5LVAL to 1252LVAL. Setting 1252L is Shutter OFF.
The programmable exposure can be set for R, G and B together (SM=1) or individually (SM=2)
in EPS mode.
Normal full scanning
2 line Vertical Binning
H
H
Horizontal CCD Register
S/H
Reset
Video
Out
Xsg1
V
er
tic
al CC
D
Re
gi
st
er
Pixel
Horizontal Direction
V
er
ti
ca
l
D
ir
ec
ti
o
n
Full
Full
1/2
Binning
Frame rate 20.31 fps
Frame rate 35.93 fps
