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Gain Control
The following gain functions are available on the camera.
• Analog base gain
• Digital gain
■ Analog base gain
Analog base gain (ABG) is gain that is performed to the analog video signal output from the sensor.
The gain steps can be configured to one of four levels.
AnalogBaseGain setting value
* Sensitivity (all scaling values are TYP values)
■ Digital gain
• Manual
0 to +24 dB (×1 to ×16), ×0.01/steps
The following two gain values are added for the total gain value.
Total Gain = AnalogBaseGain (dB) + DigitalGain (dB)
LUT ( Lookup Table) / Gamma Function
The LUT function is used to generate a non-linear mapping between signal values captured on the
sensor and those that are output from the camera.
The gamma function corrects the output signals from the camera beforehand (reverse correction),
taking into consideration the light-emitting properties of the monitor display.
The Gamma, LUT, and OFF settings can be selected on this camera. When OFF is selected, γ1 (linear)
sensitivity is applied.
The factory default setting is OFF.
■ Gamma
When [Gamma] is set, you can switch the curve characteristics by 9 steps.
1.0, 0.9, 0.8, 0.75, 0.65, 0.6, 0.55, 0.5, 0.45
■ LUT
In this mode, the sensitivity curve can be configured.
Setting range: 0 to 4096LSB (100%)
Number of setting points: 256
0
1
2
3
Setting point
— 29 —
SW-4000M-PMCL
Scaling*
0 dB (×1)
6 dB (×2)
9.54 dB (×3)
12 dB (×4)
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