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16 C2491M-D (8/06)
SWITCH SETTINGS FOR VARIFOCAL LENS
The high resolution camera with varifocal lens and auto iris is configured at the factory for automatic
exposure.
Figure 17. Switch Settings for Varifocal Lens
For manually setting and locking the white balance
Place a white background in front of camera and turn off switch 1.
For gamma correction
Switch to accurately reproduce scene brightness; when turned on, y = 0.6, and when turned off,
y = 1.0.
For automatic exposure
Turn on switch 7, and then turn on/off switch 3 for AGC, switch 4 for electronic shutter control, switch
5 for backlight compensation, and switch 6 for flickerless motion.
For manual exposure and to enable auto iris
Turn off switch 7; set switch 3 on to increase the gain by 6 dB or off to increase the gain by 18 dB;
set switches 4, 5, and 6 for the desired shutter speed.
WARNING: Do not change the shutter speed unless you understand how changing the
settings will affect the scene detail.
Table A. Varifocal Lens Shutter Speed Settings
Shutter Speed
Switch Number and Position
7 6 5 4
1/60 (NTSC)
1/50 (PAL)
Off
On On On
1/100 Off On On
1/250 On Off On
1/500 Off Off On
1/1000 On On Off
1/2000 Off On Off
1/4000 On Off Off
1/10000 Off Off Off
76453218
= SWITCH POSITION
OFF
FACTORY SETTINGS
OFF
ON
1 AWB Automatic white balance
2 GAM Gamma function
3 AGC Automatic gain control
4 ESC Electronic shutter control
5 BLC Backlight compensation
6 FL Flickerless
7 AE Automatic exposure
8 Not used
AE Functions