Posts Tagged ‘ IEC’



Security Cameras Monitoring Systems

Written By:
Friday, October 22nd, 2010

Some of the most popular items used for protection and surveillance today are security cameras monitoring systems. These systems take advantage of the latest and greatest in both electronic and computer technology making them incredibly powerful and versatile to use. In addition to deterring burglary and/or vandalism, security cameras monitoring systems offer you the peace of mind of knowing that your business, residence, or loved ones are okay.

Most security cameras monitoring systems are component systems; that is, parts of the system may differ in function (i.e. one camera may have Pan-Tilt-Zoom or PTZ and another may not) or may be made by different manufacturers (i.e. the cameras may be produced by one manufacturer while the DVR is produced by another). Regardless of the differences between components, all of the separate parts can work together to create a functional and effective security camera monitoring system.

Security cameras monitoring systems work in the following manner. The digital video camera “captures” a light image and transfers it into an electrical image. This electrical based image is sent in the form of electronic data to the DVR or Digital Video Recorder. The DVR normally contains a special type of computer processor known as a Digital Signal Processor or DSP. The DSP compiles the data from the video camera and creates a digital video file of the data which can e stored on the DVR or viewed in real time (live) on a monitor.

The DSP normally uses a COmpression/DECompression or CODEC utility to make the digital video file smaller without sacrificing quality. This is necessary because digital video files are comprised of thousands of digital photographs. In fact, they are digital photographs, but they are taken at a high rate of speed, usually around 30 photographs or Frames Per Second or 30 FPS.

This means that for every one second of video, the file will contain the equivalent of data for 30 individual digital photographs. As you can see, the file can get very large in a hurry so a CODEC is a vital and necessary tool.

The security cameras monitoring system may also include a CD/DVD writer, SD card writer, or accommodate a USB thumb drive for archiving files or for providing copies of files on a portable media to police, insurance agencies, etc.

There are a variety of optional features available for digital video security cameras however it may be easier to differentiate between cameras if they are categorized first, based on two of these features. The first criteria to use for categorizing the cameras can be the shape of the camera itself. There are three basic shapes or types:
• Box shaped cameras;
• Bullet shaped cameras; and,
• Dome cameras.

Box shaped cameras look just like the name implies; they are rectangular shaped to resemble a small box. These cameras may be mounted on walls, ceilings, and other structures. Bullet shaped cameras are elongated and rounded in shape on the ends to resemble a bullet-type structure. They may also be mounted on walls, ceilings and other structures. Finally, dome shaped cameras are usually flush mounted on ceilings with a rounded dome protrusion just big enough to allow for the camera lens.

The second criteria for categorizing digital video security cameras is whether they are designed for indoor use, outdoor use, or both. Indoor use only cameras cannot be used outdoors because they may be damaged by exposure to dust, water, and other debris. Outdoor security cameras monitoring systems or indoor/outdoor cameras are enclosed in a protective case that allows the camera to function properly but prevents entry (ingress) of dust, water and other matter.

Many outdoor cameras will be certified according to the protection the enclosure provides using a International Electrotechnical Commission (IEC) standard called an Ingress Protection code or IP rating. This code consists of two digits; the first digit represents protection from dust and the second digit represents protection from liquids. The first digit of the rating ranges from 0 to 6 and the second digit ranges from 0 to 8, the higher number indicating a greater rate of protection. An IP65 rating for example, means the enclosure is dust tight and provides protection from water projected by a nozzle against the enclosure from any direction.

There are many other option features available on the components of security cameras monitoring systems. If you are interested in additional information, check our knowledge base or security articles or contact one of our security experts today.

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Outdoor Wireless Security Camera 500ft Range

Written By:
Monday, October 18th, 2010

An outdoor wireless security camera 500 ft range is adequate for most commercial and residential applications. This type of camera is easy to install and easy to operate and can be purchased with many optional features that greatly increase its versatility. In the following article we’ll talk a little about wireless security camera technology and some of the additional features that can be purchased for these cameras.

There are a few key factors that separates an outdoor wireless security camera 500ft range from other basic security cameras. First, as its name denotes, this camera is an outdoor camera. Outdoor security cameras are designed to withstand weather and other natural outdoor elements that can damage the camera or affect the working quality of the cameras.

When a security camera is specifically classed as an “outdoor” camera, it often has a rating in the camera specifications that indicates exactly how much protection is afforded to the camera from external objects. This rating, called an Ingress Protection rating or IP code, is an International Electrotechnical Commission (IEC) standard.

The code consists of the capital letters “IP” and two digits. The first digit indicates protection afforded against solids and the second digit indicates the protection afforded against liquids. The first digit’s scale ranges from 0-6 with 6 being the best protection, and the second digit’s scale ranges from 0-8 with 8 being the best protection. A good IP rating is IP65 or IP66.

IP65 means the camera is completely protected from dust and water jets from a nozzle coming from any direction. IP66 means the camera is completely protected from dust and water projected by powerful nets in any direction.

The other key feature of an outdoor wireless security camera 500ft range is that the camera uses wireless technology and has a maximum operating range of 500 feet. Non-wireless digital video security cameras work by creating a digital picture and transmitting the digital video data to a Digital Video Recorder (DVR) or monitor via a coaxial video transmission cable. This cable, usually an RG-59 coaxial cable must be run from each individual camera to the DVR or monitor. Wireless cameras eliminate this video transmission wire.

Outdoor wireless security cameras with a 500 foot range contain the internal circuitry to convert the digital data into a radio waveform that can be sent with out cabling. There are various radio technologies used to do this based on the manufacturer, but some of the more popular are the 900MHz an 2.4 or 5.8 GHz band radio technologies. These are the same sorts of technologies used by land line based wireless telephones.

One word about the camera radio technology. This technology is usually based on range which is defined as the maximum distance between the camera antenna and the receiver (or DVR) antenna based on Line Of Sight or LOS. LOS means this range should be attainable provided there is a clear line of sight between the two antennae, i.e. no objects can impede or block the LOS.

If there is not a clear LOS, it doesn’t mean the camera will not work. Usually, depending on the object(s) such as glass, trees, or walls instead of the camera signal failing, the range is just reduced. How much the camera’s signal is reduced is dependent on the material that the signal must penetrate. For example, it is not uncommon for an outdoor wireless security camera 500 ft range LOS to work at a 200 – 400 foot range through walls.

Digital video security cameras are powered by low voltage Direct Current (DC) electricity. This may occur as a small wire that is run from a power distribution center or a plug-in adapter that can be plugged into the nearest wall outlet. Since wireless cameras have already eliminated the need for a video transmission cable, some manufacturers make models that are totally wireless’ the camera can run off of power from batteries or rechargeable batteries.

There are many cameras with optional features that can be purchased. A few of these features include:
• Audio Recording
• Infrared Night Vision
• Day/night low visible light operation
• Pan-Tilt-Zoom (PTZ) operation
• IP or Internet Protocol ready

This should give you enough working knowledge to help you decide if you need an outdoor wireless security camera 500 ft range. If you have any other questions or would like to make a purchase, contact one our Security Camera King’s security experts today.

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