Vertical Binning (Vb); Electronic Shutter (Sm) - JAI AT-200GE User Manual

9.3.4 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.
H
Normal full scanning
H
2 line Vertical Binning
Setting
Off (No V Binning))
2:1 V Binning

9.3.5 Electronic shutter (SM)

The AT-200GE has the following shutter modes.
 Programmable Exposure (PE)
The setting command is PE and the exposure time can be controlled from 0L to 1252L in 1
LVAL units (51.88µs). 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.
Programmable exposure can be set for R, G and B together or individually in EPS and RCT
modes.
The shutter speed for each operating mode is shown below.
Mode
Continuous
Edge Pre-select
Pulse Width
Note: In Pulse Width mode, the minimum trigger pulse width requires more than 2LVAL.
AT-200GE
Pixel
Video
Out
Horizontal CCD Register
Reset S/H
Fig.24
Effective/total
1236 /1252
618 / 628
Read Out Minimum shutter speed
Full 25.94 µs at PE=0(1/38,550s)
Partial
V binning 28.77 μs at PE=0(1/34,760s)
Full 51.88 µs x 2L+25.94 µs( 0.5L)=
Partial
129.7 µs （≒1/7,700s）(Note)
V Binning 57.54 µs x 2L + 28.77 µs(0.5L)=
143.85µs （≒1/6,950s）(Note)
Xsg1
Binning
Vertical Binning
Horizontal
Frequency
19.276 KHz
17.381 KHz
- 30 -
Horizontal Direction
Full
Full
Frame rate 25.21 fps
1/2
Frame rate 40.98 fps
Frame rate
15.40 frames/sec.
27.68 frames /sec.
Maximum
shutter speed
51.88µs x
1252L=1 Frame
(64.95 ms)
30 Frames
( 2 seconds )