43 NED
XCM
4085TLCT6
UME-0062-01
Note : Adjust amount of offset in accordance with the requirements of your camera
system. The gradients of lines do not change.
4.10 Setting Analog Gain
Gain can be adjusted by setting analog gain (6 steps, x1~x5.5) or digital gain (512
steps, x1~x2). In both cases, increasing the gain setting increases the slope of the
camera’s response curve, so that the output saturates at a lower level of light.
Conversely, with less light, a higher output can be obtained; that is to say, the
cameras sensitivity has been increased. Analog gain can be adjusted with the
“gax”
command.
Figure 4-10-1 Gain Adjustment
Gain-Sensitivity at digital gain x1, pixel correction: default, factory white correction
data is shown below.
Table 4-10-1 Gain-Sensitivity
Analog gain
Sensitivity V/ (lx
・
s)
1
X1
100
2
X1.5
150
3
X2
200
4
X3
300
5
X4
400
6
X5.5
550
Note:
Gain and noise values are proportionally related. Adjust amount of gain in accordance
with the requirements of your camera system. We recommend using gain from x1 to
x3.
Ｆ
s
：Saturation Output(DN)
Ｓｅ：Saturation Exposure(DN)
Se
Volume of Light（lx・s）
Output data(DN)
Ｄ
f
：Dark Current(DN)
Fs
Dｆ
0
Minus gain
Plus gain
