Explosion proof surveillance camera video fault diagnosis

Date：2012-12-22

1.Video signal loss

Phenomenon description: intermittent or continuous video signal loss

Cause analysis: camera malfunction, power failure or transmission line fault

2.Random transverse spiny noise

Phenomenon description: horizontal random strips or spiny noise

Cause analysis: poor contact, electromagnetic interference, line aging, etc

3.Horizontal strip noise

Phenomenon description: transverse article certain width of the strip light or dark, motionless or vertical offset

Cause analysis: the camera malfunction

4.Dot snowflakes noise grading

Phenomenon description: the whole picture appear snowflake random noise

Cause analysis: electromagnetic interference, camera sensor itself noise

5.Brightness abnormal

Phenomenon description: too bright, too dark, fliker

Cause analysis: camera malfunction, gain or exposure time parameter Settings wrong, the ambient light is too strong or too dark, people keep out camera

6.Color abnormal

Phenomenon description: full screen color missing, the ribbon color confusion

Cause analysis: analog video camera line contact undesirable

7.Screen Freeze

Phenomenon description: the whole picture motionless for a long time

Cause analysis: camera failure, transmission failure

8. Motion judder

Phenomenon description: Overall picture of mobile

Cause analysis: camera shake

9.The picture scroll

Phenomenon description: vertical loop rolling picture

Cause analysis: analog video camera malfunction

10.Severe change picture

Phenomenon description: The whole picture appear strong interference

Cause analysis: electromagnetic interference or camera malfunction

11.Ambiguity grading

Phenomenon description: image out-of-focus

Cause analysis: lens focusing improper

12. Blocking out lens

Phenomenon description: screen large enough area be other objects blocking out

Cause analysis: man-made destruction