Video systems have grown to be a part of our everyday lives. When video surveillance systems first hit the marketplace from the mid 80’s, they immediately crafted a major influence on crime prevention and just how crimes are investigated. Early video systems required a hardwired link between the cameras along with the recording system. Recent innovations in wireless video transmission are changing that requirement. Camera giam sat systems are sprouting up just about everywhere to satisfy a variety of consumer requirements. From wireless baby monitors to high-end high-definition wireless broadcast systems, wireless video systems can be found in a wide array of prices, features and processes.
Most modern, consumer grade wireless video systems will fall under one of the following frequencies; 900 MHz, 2.4 GHZ or 5.8 GHz. Many of the affordable consumer grade wireless cameras out there get caught in the 2.4 GHz range. Every wireless video system is made up of camera, a transmitter, a receiver, an antenna along with a power supply. Transmission ranges may differ greatly based on the frequency, the antenna and also the rated power output. Except for more expensive, high power broadcast quality systems; most wireless video systems usually do not demand a license from your Federal Communication Commission (FCC) to work. No matter what frequency you plan on using, in case you are installing a very high powered installation, especially near a highway or even an airport, you need to secure the appropriate FCC license.
For the best results and also the longest range, most wireless video transmission systems require a clear line of site involving the transmitter and the receiver to use consistently. Wireless video signals tend not to penetrate perfectly through glass, walls, concrete, trees, steel or other obstructions. Moreover, other RF signals around the same frequency could cause interference or even be interfered with by wireless video systems. Within the 2.4 GHz range loved by most security applications, interference can be experienced between cordless phones, microwaves, local television broadcasts, computer monitors, and power supplies or wireless LAN/WANs. Sometimes interference problems could be solved by re-locating the transmitters or receivers.
Since 90% of consumer grade wireless video systems fall into the 2.4 GHz category, we shall discuss the functions of the two 2.4 GHz analog and digital systems and also the limitations and benefits associated with each. The whole 2.4 GHZ bandwidth allocated for consumer use is produced by 2,412 MHz to 2,462 MHz Depending on the FCC standards; there are actually 11 possible channels which can be 22 MHz wide with a 5 MHz spacing interval in between each. So that you can allow multiple cameras about the same system, residential, consumer grade 2.4 GHz analog video transmitters such as a wireless baby monitor or perhaps a door camera require fixed frequency, non-overlapping channels to lessen interference.