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NED
XCM2080SAT4
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XCM2040SAT4
UME-0006-04
4.11 Setting Gain
The camera can adjust the analog gain (x1 to x20 in 7 steps) and the digital gain(x1
to x2 in 512 steps). As the diagram below indicates, increasing the gain setting
increases the slope of the camera
’s response curve and results in a higher camera
output for a given amount of light.
Analog gain can be changed by sending the
”gax” command.
Digital gain can be changed by sending the
“gdx” command.
Figure 4-11-1 Gain Adjustment
Gain-Sensitivity of digital gain x1, pixel correction: default, (factory white correction data)
is shown below.
Table 4-11-1 Gain-Sensitivity
analog gain
Sensitivity V/(lx
・
s)
1
X1(0dB)
50
2
X2(6dB)
100
3
X4(12dB)
200
4
X8(18dB)
400
5
X10(20dB)
500
6
X12(22dB)
600
7
X20(26dB)
1000
Note:
Gain and noise values are proportionally related. Adjust amount of gain in accordance
with the requirements of your camera system.
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
