With the high interest many home and business owners have been installing CCTV cameras, it’s worth finding out a bit about what can go wrong and how to avoid these issues. The fact is that it’s better to opt for the highest quality CCTV cameras you can afford to minimize any problems you may come across as you really, within reason, do get what you pay for with CCTV cameras.
Here are some of the common CCTV camera problems:
- Sun Burn Out
It’s important when setting an outside CCTV camera that it’s positioned so that sun rays cannot enter directly into the camera at any time of the day. This can usually be overcome by having the camera pointed downwards, but be aware of reflections from objects such as windows and parked cars. During the night spotlights can also give the same type of effect, so should be behind the CCTV camera if possible
- Electrical Conductivity
CCTV cameras should never be mounted directly onto metal surfaces as it can result in surging or bleeding of the current causing lines or distortions in your images. If you are experiencing problems like this remove the CCTV camera and remount it on an insulating block of plastic or timber to prevent any chance of electrical bleeding
- Ground Loops
Ground loops are caused by uneven grounding potentials in power supplies or wiring in circuits connected to your camera or around the building where your CCTV cameras are installed. This condition can cause a range of problems to your CCTV cameras, including humming noises as well as general interference with computer monitors, TV screens and electronic equipment associated with your system.
There are two options, you can have all the wiring in the same circuits checked or simply attach loop isolators to your CCTV cameras to remove the problem
- Incompatible recording Systems
CCTV camera systems use two types of operating systems. In Australia we use the PAL or Phase Alternating Line system as the standard broadcast format. In parts of Asia and America they use the NTSC or National Standards Committee format. Unfortunately, these system formats are incompatible, so you need to be careful if buying overseas equipment or second hand equipment to make sure it’s compatible with the rest of your system
- Infrared Filters
An infrared filter is used to allow visible light waves, but to eliminate infrared light waves to improve the quality of your images. If you have a cheap CCTV camera, it’s unlikely to have one of these filters so it’s often difficult to get good quality images
- Power Supply
It’s important to have the right power supply to your CCTV camera, otherwise you could experience such things as rolling lines moving from the top to the bottom of your screen, but the image won’t move. To correct this ensure your power supply is compatible with your camera
Today’s CCTV cameras are very sophisticated and easy to operate, but it’s important that they are installed properly to give you the best possible picture quality and viewing range. Things like sun glare and reflections can affect the overall quality. The less expensive models are often not able to give an identifiable picture quality.