CCTV System Problems Solutions: Camera
No image out
- Check power supply connection normal or not, voltage sufficient or not.
- Whether BNC adapter or video cable is in poor contact
- Whether lens aperture is open.
- Whether video cable and AC auto aperture lens cable connect well
Image quality poor
- Whether lens has fingerprint or dirty
- Whether aperture is adjusted well
- Video cable is in poor contact.
- Whether electronic shutter setting or white balance setting has problems
- Whether transmission distance is too long
- Whether voltage is normal
- Whether there is interference source nearby
- Inner-elevator installation should avoid interference by ensuring camera insulates with elevator.
- Whether CS-mount is correct
Problems (caused by overlong distance transmission) and solutions
- Monitor picture contrast too low, image weak.
This appearance reason lies in control server, monitor, overlong distance transmission or transmission signal loss too much. In such situation, adding cable amplifier kit and compensation kit is needed.
- Image definition low, details loss, even color signal loss or saturation under-standard
This appearance is caused by that high frequency signal is damaged too seriously and frequency (over 3MHz) loses mostly. This problem is caused by many reasons which include transmission distance overlong (without amplifier & compensation kit), distributed capacitance overload in video transmission cable, equivalent capacitance centralized between transmission cable core and screened wire.
- Hue distortion
This appearance happens easily during long distance video transmission. The main reason lies in high-frequency section phase shift overdone. In such condition, adding phase compensation is needed.
