Backlight compensation (BLC) setting

The backlight compensation ON/OFF is set using the BLC ON/OFF switch (9) in the camera setup section.

ON: Default setting, backlight compensation function on. However, depending on the camera installation location and conditions of use, if the backlight compensation function need to be set, with the BLC switch set to ON, press the SET button to select one of PRESET (1, 2) or MANUAL (1, 2) modes indicated below.

•PRESET 1 (Basic setting, see Fig. 1)

When the subject is dark and moving within the image, the brightness control is done independently for the 5 windows (W 0-4). This setting is recommended when the subject will be moving across or within the image.

•PRESET 2 (Basic setting, see Fig. 2)

The windows are regrouped in 2 sections (W 1 and 4; and W 0, 2 and 3) and the lens iris is set automatically so that the backlight correction is optimum for the section composed of windows W 1 and 2. This setting is recommended when the subject will be centred in the image.

•MANUAL 1 (or MANUAL 2) (Fig. 1, 3)

The size and position of window W 4, and the windows (W 0 - 4) distribution (WINDOW WEIGHTING) can be set manually to control a bigger area of the screen (e.g. when the subject will be moving in the screen area) and stored under one of the two manual settings.

OFF: Fixed backlight compensation

Notes:

•The backlight compensation will operate when using an auto-iris lens (DC or VIDEO type).

•If in the “MENU FOR ADJUSTMENT”, AGC is set to OFF, the backlight compensation will not operate.

Iris level setting

The iris is set using the IRIS AI (Auto-Iris)/EI(Electronic Iris) switch (10) in the camera setup section.

AI: Initial setting. When using a DC type auto-iris lens, the iris level settings can then be entered in the adjustment sub-menu (see page 17).

EI: Electronic iris mode setting.

Note: If the AGC switch is set to OFF, setting the IRIS switch to EI will not set the electronic iris mode.

ON

OFF

 

W0=1

 

W2=10

W4=15

W3=10

 

W1=5

 

 

Fig. 1

 

 

W0=0

 

W2=0

W4=15

W3=0

W1=15

 

Fig. 2

 

WINDOW WEIGHTING

W0

1

W1

1

W2

3

W3

3

W4(FIX)

15

PRESET

OFF

MENU END

END

Fig. 3

AI

EI

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