Usually when home owners set up a new wireless surveillance camera system there are a few basic questions that almost always are asked:
A common question is, Can I use sound with my surveillance camera system?
It depends, audio recording is not permitted as evidence in court or legal proceedings therefore it cannot be used. According to the U.S. legal code sound recording is not to be used example, surreptitious orsecret use is audio that comes from a hidden device. So, if the CCTV system is in open or the subjects sight then sound recordings may be ok. However, if the security units are covert or obscured, such as a hidden camera, then sound should not be utilized.
Hidden cameras would consist of pin hole or micro cameras plus almost all spy cameras, such as, a clock containing a hidden camera inside. Audio recording in a hidden camera or miniature camera is only available to legal officers or law enforcement bureaus. An exception is the use of body worn cameras, like, a spy camera in a hat or a hidden camera in a tie clip and so forth. Refer to Title 18, Section 2512.
Often new users also want to find out the distinction is between a wired and a wireless camera system?
A wired security camera system uses a video cable that runs from the security cameras to the recording device such as a DVR/ VCR recorder, or live monitor such as a TV screen. The wireless security camera has a built-in or attached wireless transmitter that sends a video data from the camera to your receiver unit. The wireless receiver device then connects to the DVR or the TV.
If you are using a wireless security camera system you should think about the distance your wireless cameras are placed from the wireless receiver device. Most wireless surveillance cameras can send signals up to 1000ft. while high powered wireless surveillance cameras can send asfar as 2500ft.. These high distances are for clear line of sight transmissions. Transmissions go much shorter lengths when they must pass through multiple walls, barriers, or interfering wireless tranmissions standing between the wireless cameras and your wireless receiver device.
The most frequent cause of wireless transmission interference is from cordless and cell phones. Cell and handset phones operate using the 2.4 GHz frequency which will create interference with 2.4 GHz wireless security camera systems. Fortunately interference is usually minor and usually only when your phone is in a straight line between your transmitting camera and your receiver unit. Other causes of interference include wireless Internet, networks and WiFi.
The interference you get from walls and other barriers should be minor. Generally 2.4 GHz wireless security cameras can send and receive through walls as much as 2feet in thickness, as long as the wall does not contain a high proportion of metal.
What about having several wireless security cameras in a single location?
Most wireless security camera setup has more than simply one camera. You usually find that most systems provide a max of four wireless security cameras in one area. This is because each device is sending its signal using a slight variation of the 2.4 GHz transmitting frequency which is called the channel. Any in excess of 4 then your wireless security cameras will start to cause interference for one another.
If you want to see all of the wireless feeds from the four security cameras simultaneously you will need 4 separate pairs of wireless transmitters and receivers. You can use one wireless receiver with four transmitters only if you are willing to toggle back and forth to each camera. You will only be able to view one video feed at a time when you decide to utilize only one receiver. When using multiplenumerous wireless cameras in one area you will need to set the DIP switches for each transmitter for a unique channel.
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