Camera Common Problems Analysis:
1. No video signal output after power up
First check whether the polarity of the external power supply is correct, and whether the voltage meets the requirements. For DC12V and AC24V, it should be within the % range of work, and for AC220V, it should be within the range of 185V~265V.
2, color distortion
It may be that the white balance switch (AWB2) is not set properly, or the ambient light conditions may vary too much. At this time, check whether the switch setting is in the OFF position and you should think of ways to improve the ambient light conditions.
3, the image appears distorted or geometric distortion
This phenomenon may be a video camera. There is a problem with the geometry correction circuit of the monitor, it may be a problem with the optical lens, or it may be that the characteristic impedance of the connecting cable or device does not match the output impedance of the camera. When the above phenomenon occurs, first check the optical lens used, and then check whether the characteristic impedance of the cable or other connected device is 75Ω.
4, a few black bars in the vertical direction of the screen
This situation is generally the ripple of the DC supply voltage is too large, should strengthen the filter and use good performance DC regulated power supply.
5. Multiple vertical bars appear in the vertical direction of the screen
This may be caused by the reflection caused by the characteristic impedance of an external video cable or device that is not matched with the camera. It should be noted that the characteristic impedance of the selected video cable and other connection processing devices is 75Ω.
6, picture noise may have the following reasons:
Poor grounding of the camera's internal circuit board; Insufficient video amplitude output; Insufficient ambient light intensity; Poor connection or short circuit of the connected optical cable; Poor signal to noise ratio of the monitor itself
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