Philips PCA646VC Installation Manual page 15

When the mode setting is in freeze mode, the automatic white balance
control is switched off.The actual colour setting remains stable and is
not influenced by the internal controls of the camera. Put the white
balance in freeze mode when you have a colourful scene and stable
lighting conditions.
To obtain a perfect colour reproduction, act as follows:
Choose auto mode;
Hold a piece of white paper in front of the camera;
After a few seconds, switch from auto to freeze mode.
Now the colour setting remains constant.When light conditions
change it is recommended that you put the white balance mode on
auto again.
In auto mode the control speed setting determines the speed of
automatic adjustment to changing light conditions. Experiment with
this setting until you find one to your liking.
In manual mode you can determine manually the amount of red and
blue in the picture.Try a few settings at your leisure, but you will find
that the auto setting is best in most cases.
Exposure
The exposure setting determines the amount of light that will fall onto
the video sensor chip. In auto exposure mode the camera
automatically adjusts the exposure gain and shutter speed.The control
speed setting determines the speed of automatic adjustment to
changing light conditions. Experiment with this setting to find one to
your liking.
In freeze mode all existing settings are frozen.
In manual mode you can control the gain and shutterspeed settings
manually.Try a few settings at your leisure.The auto setting will be best
in most cases. Both freeze and manual exposure mode disable the
controls for contrast and backlight compensation in the next tab
(marked Image Controls).
14