1. No video signal output after power on
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 in the working range, and for AC220V, it should be in the range of 185V~265V.
2. Color distortion
It may be that the white balance switch (AWB2) is set improperly, or the environmental lighting conditions have changed too much. At this time, check whether the switch setting is in the OFF position, and find ways to improve the environmental lighting conditions.
3. The image appears distorted or geometrically distorted
This phenomenon may be caused by a problem with the geometric correction circuit of the camera and monitor, or a problem with the optical lens, or the characteristic impedance of the connecting cable or device does not match the output impedance of the camera. When the above phenomenon occurs, please check the optical lens used first, and then check whether the characteristic impedance of the cable or other connecting equipment used is 75Ω.
4. Several black bars appear in the vertical direction of the screen
In this case, the ripple of the DC power supply voltage is generally too large, and filtering should be strengthened and a DC stabilized power supply with good performance should be used.
5. There are multiple vertical bars in the vertical direction of the screen
This may be caused by reflections caused by a mismatch between the characteristic impedance of the external video cable or the device and the camera. You should pay attention to whether the characteristic impedance of the selected video cable and other connection processing equipment is 75Ω.
6. The picture is noisy. There may be the following reasons:
The internal circuit board of the camera is poorly grounded;
The video amplitude output is not enough;
The ambient light is not enough;
Whether the connecting optical cable is in poor contact or short circuit;
The monitor itself has a poor signal-to-noise ratio;
