Wireless video transition is made possible with use of video transmitters and receivers. Most wireless cameras come with a built in video transmitter and a separate video receiver. Once installed the video signal is sent wirelessly thru a specific frequency to the receiver which is connected directly to a security monitor, timelapse recorder or the other components of the security camera system in more complex systems.
Should we use wireless cameras? This is one of the most frequently asked questions that comes up while designing a security camera system. The answer to this question is not as simple as it may seem. After all wireless cameras seem like the easiest solution, no cables to run means less labor involved. Not so fast, before you make that decision there are a few things you need to know about wireless systems. A wireless security camera is not totally wireless. Thatís right, their name is slightly deceiving because it only refers to the video signal. Even though no video cable is needed for the wireless camera, it still requires power, which means another cable from the camera to the closest outlet. And if there are no power outlets located near by than a power cable will have to be installed all the way back to the nearest outlet.
The limited number of frequencies available is another disadvantage when designing a system using wireless cameras. Most wireless camera are limited to 4 different frequencies. This means that you are limited to using four cameras at one location per frequencies range. Thankfully there are a couple of frequency ranges, 900MHz and 2.4 Ghz. A combination of cameras from both frequency ranges could expand the number of cameras per location to eight.
Just like with many other wireless equipment that you might be familiar with, various objects located between the transmitter and receiver could pose reception problems. One of the worse material to go thru would be metal and clear line of sight is preferred for optimum range and reception. So when designing a wireless system, please keep in mind to keep the number of walls or objects between the wireless security camera and its receiver to a minimum for best reception.
Now that you have a better undersanding of wireless security cameras you should be able to decide wether wireless camera are the right choice for you. And if they are, than there are numerous application where you can use them. They can be used almost anywhere but the most common ones are; covert video surveillance, baby sitter camera, lobby camera, museum or monitoring of high value objects because it makes it hard for intruders to destroy the recording media by locating the recording device.
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