56
NED
RCDL2K20CL
UME-0115-02
4.10
Setting Gain
The camera can adjust the analog gain (x1 to x10.0 in 8 steps) and the digital gain.
As shown in the figure below, increasing the gain setting increases the gradient 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 4-10-1 Gain Adjustment
◆
Gain and noise values are proportionally related.
◆
Adjust the amount of gain in accordance with the requirements of your camera
system.
Table 4-10-1 Gain-Sensitivity
gax
Analog Amplifier
Sensitivity V/(lx
・
s)
0
x1.0
0.0dB
60
1
x2.0
6.0dB
120
2
x3.0
9.5dB
180
3
x4.0
12.0dB
240
4
x5.0
14.0dB
300
5
x6.0
15.6dB
360
6
x8.0
18.1dB
480
7
x10.0
20.0dB
600
Note:
Digital gain x1, Pixel correction default (Factory white correction data, Correction level
800 DN / 10 bit)
Ｆｓ
Fs : Saturation Output
Gain a
Amount of Incident
Light (lx
・
s)
(a<b<c)
Gain b
Gain c
Output
