Quasar CB-6204 User And Installation Manual page 120

Auto P-Iris Mode
Auto-P iris is the default mode. It automatically and smoothly adjusts the iris when the light level
drops to a point where it is insufficient to support the P-iris setting. A Minimum Shutter Speed may
be set from the drop-down menu to ensure a maximum level of exposure.
The following setting are available:

Min Shutter Speed – When selecting this mode, the shutter is completely open and the
exposure priority is given to the iris. Shutter speed and AGC circuit function automatically in
cooperating with the iris to achieve a consistent exposure output.
The shutter speed range is from 1/4 to 1/30 sec (NTSC) and 1/3 to 1/25 sec (PAL). The
following table lists the options.

F Number – Displays the current F-Stop setting.
Click SET when you finish configuring the settings.
Manual Mode
Manual Mode opens the iris completely with a fixed gain to a fixed shutter speed. Users can select a
suitable shutter speed according to the environmental luminance.
In Manual Mode, the administrator can select a fixed shutter speed and gain from drop-down
menus. The smaller the shutter speed number (the higher the shutter speed), the lower the
exposure level. The higher the gain, the brighter the picture.
Manual mode is used generally where light levels are fixed and the auto settings do not provide the
perfect exposure. It is recommended for scenes where there is a fixed lighting contrast and a
constant, precise exposure is required.
The following setting are available:

Iris Size Setting – Select the following buttons
The minus (-) button closes the iris.
The Plus (+) button opens the iris.
The reset button is for resetting the P-iris
The radial button is for automatically selecting the optimal iris exposure
Auto Iris -
Min Shutter Speed
PAL NTSC
1/25 1/30
1/12 1/15
1/6 1/8
1/3 1/4
Configuration and Operation
107