Answer:

1. Auto iris lens and CCD-Iris are possibly mutual interfered, choose one to be used based on where it would be used. Manual iris and CCD-Iris would also mutual interfered in some specific cases, iris could be properly adjusted to solve this problem.
2. Pay attention to the tracing scope and limits of available places of the ATW/ATW-PRO.
3. VIDEO LEVEL is an integrated improvement for the level of the video; more efficient adjustment could be achieved when the AGC function is used. When it¡¯s too bright or dim for a black subject, consider this function if all the other adjustment fails.
4. Drift color spots could be avoided when iris is properly adjusted.
5. The operation of SHARP is subject to the object monitored and the size of the screen.
6. In the occasions where light varies a little, better to avoid using AGC function to achieve best image.
7. BLC setting is for backlight compensation, it¡¯s unnecessary when there is no backlight, note characters would came out in different occurrences, use models for the adjustment in all aspect.