Advidia "A" Series Manual de usuario descargar pdf (Pagina 62)

Firmware User Manual

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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Advidia "A" Series Manual de usuario Pagina 62