ACTi I51 User Manual download pdf (Page 76)

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Firmware User’s Manual V6.08.30

white color to fine tune the rest of the colors.

In such cases, the installer can “help” the camera to understand the true colors by placing a white

object (for example a piece of white paper) in front of the camera to cover the whole field of view

and wait a few seconds – the auto white balance system will adjust the colors until the white

paper will really look white on the display. At that moment, the user can freeze these white

balance settings by pressing the Hold button. After pressing that button, the White Balance will

switch from Auto mode to Manual mode, together with the color values captured at the moment of

Hold. The user can now remove the white object from the field of view, and the colors will stay

correct for given scene.

For advanced users, there is also an option to switch from Auto mode to Manual mode of White

Balance directly and input the R Gain and B Gain values manually.

Line Frequency is the function that adjusts the shutter speed options to match with the

frequence of artificial light source of given country. For example, in Europe the light frequency

(due to power supply frequency of lights) is 50Hz, that is 50 flashes per second. By setting line

frequency to 50Hz in such case, the shutter speed options will be proportional with light source

frequency, such as 1/25s, 1/50s, 1/100s, etc.

It is necessary to have the camera’s Line Frequency adjusted according to the power

frequency of the light source to avoid flickering effect.

The natural light source (sun light) is a seamless flow of light – the Line Frequency setting does

not matter for the cameras that are only exposed to natural light.

After changing any of the items above, press Apply to save the changes. The Reset button

undoes the changes that had just been made but not Applied yet.

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ACTi I51 User Manual Page 76