Posts Tagged ‘ CCTV cameras’



CCTV Cameras

Written By:
Friday, January 13th, 2012

CCTV cameras are made in a variety of types and for a wide range of uses. Complicating the selection of cameras more are the variety of technologies within each category type.

In order to understand the range of cameras available to the general market, and useful for ordinary consumer applications, this article is divided into three sections: camera types, lenses, and technology types.

For readers who are new to the topic of CCTV, mention should be made of the term. The term is an acronym for “closed-circuit television.” Other terms are used interchangeably that mean virtually the same thing: “security camera,” “surveillance camera,” “spy camera,” and “video camera.” There are some nuances in the meanings, perhaps, but they are very minor. There is no intention in this article to differentiate between them.

Camera Types

Types are basically a reference to the camera body style. There are three basic types for ordinary use: box cameras, dome cameras, and bullet cameras. There is an additional type called a “board camera,” getting its name from the fact that it attaches directly to a circuit board, without a body. They are used in applications such as ATM machines and not for everyday consumer applications; therefore, the discussion will be limited to the three main camera body types listed above.

Box Cameras

The camera body of a box camera, as the name suggests, is in the shape of a box. The camera and lenses are normally bought separately. As they do in a still camera, the lenses are attached to the body and are easily changed if the application requires it.

Box cameras are known for giving high quality images, and with some of the higher specifications, the box cameras are often preferred in low light conditions.

The camera body and lenses for box cameras are more vulnerable to weather conditions and vandalism when mounted unprotected. The body of the box camera is not designed to withstand the elements, making it necessary to enclose the camera in weatherproof and vandal resistant housings.

Housings are designed to protect the camera, and the housing itself has some available features that make them a desirable choice. Some housings come with a heater/blower function that protects the camera from freezing temperatures and ice. The housings come with ratings from NEMA, the National Electronics Manufacturers Association, to give consumers guidance on selecting the best housing for the application.

Box cameras are versatile because of the ease with which the lenses are interchangeable, and the choices that can be made with housings. With the additional advantage of having some of the best specifications in the market, box cameras are still preferred by many users of security cameras.

Dome Cameras

The dome camera is the one commonly seen in public buildings. They are easily spotted because of their dome shape, often with a blue or gray tinted cover. They can be mounted on walls as well as ceilings, and with the proper housing and mounts, they can be mounted as a pendant or on poles.

Unlike the box camera type, dome cameras come in one piece. The lens is internal to the camera body. Though several choices of lenses are available, normally a dome camera’s lens is not changed once it is purchased and mounted. When buying a dome camera, it is important to know the range of distance that the camera will be watching, the lighting conditions, and any other dynamics that exist in the application. Changing lenses on a dome camera is impractical.

In the lens discussion below, there will be more said about the types of lenses. For the current discussion, however, let it be known that the lenses, though internal to the dome camera, should be adjusted and tested while installing. Removing the cover is required, and it is accomplished easily. Changing the lens is difficult and impractical, not the adjustment of the lens.

Bullet Cameras

Another common body type for cameras is the bullet camera. These are cameras that come with the lens already installed, as in dome cameras, and they are already shrouded with an external housing.

Bullet cameras are most often seen in outdoor applications such as building perimeters, light poles, public gathering areas, concourses, and many other areas that are susceptible to weather and vandalism.

Lens choices for bullet cameras are generally the same as with box and dome cameras, and they are most always accompanied with infrared LEDs to give a reddish light in total darkness so the camera can see in the dark.

Quick Word About Infrared (IR) Options vs. Day/Night (DN) Cameras

Infrared LEDs are common, either in cameras or external housings, in most camera types. Buyers should be aware, however, that in many cases, in low light conditions, a day/night camera is preferable to an IR (infrared) camera. The day/night cameras on the market, especially in box cameras, often capture better images than infrared in low light conditions.

Why is this? Infrared LEDs are triggered by darkness. The lens in IR cameras is usually not capable of seeing in low light conditions. If the ambient light is bright enough, as it often is, even though the buyer thinks it is a dark condition, the IR LEDs may not be triggered, or may be ineffective. In total darkness, however, when there is no ambient light, such as moonlight or street lamps, infrared cameras are the best choice. Again, knowing the conditions is vital to making the right choice.

Lenses

There are many specifications for lenses that may make one a better choice than others, but generally speaking, there are just a few basic lenses that need to be discussed here.

Varifocal or Fixed Lens

A fixed lens has only one focal length, which means that the lens is fixed on one space, with no capacity for adjusting the focus. If the optimal distance for a certain lens is to focus on ten feet away from the camera, it will see the ten feet distance very well. However, the further away from the ten feet distance the view gets, whether it is seven or thirteen, nearer or closer, the lens loses its focus.

A varifocal lens is one that can be adjusted within a certain range. It has a variable focal length. Do not be confused with the zoom function, which is discussed next, because it does not change on the fly. It simply means that the lens can be adjusted at the time of installation within a range of settings to accommodate variable distances.

The advantage of the varifocal lens is that a person can choose cameras that are uniform in appearance and function while still having the flexibility to focus each one for its own particular application. Having the focal length adjustment available keeps the buyer from having to replace a camera if the distances are different from what they had planned. There is so little cost difference between the two types of lenses, it is impractical not to use varifocal camera lenses.

Zoom Function

Some lenses come with a zoom function that is controllable from a keyboard by an operator. It allows the operator to zoom in, or to bring an image closer, for a better look. The zoom function for camera lenses operates within the limitations of its designs. If it is a 10x optical zoom, for instance, it means the lens can be zoomed in at ten times the magnification of its basic position. If the focal length is 5mm, the zoom feature on a 10x zoom lens could zoom in to a 50mm range, giving a narrower field, but presenting a larger image for inspection.

Pan-Tilt-Zoom (PTZ)

PTZ cameras are the thoroughbred of the industry. Combining the zoom function with the ability to pan (side-to-side movement), and tilt (up and down movement), the PTZ offers maximum versatility in application.

Normally, the PTZ cameras are housed in domes, though they are typically larger than standard dome cameras.

A PTZ camera comes with a higher price, but it comes with a much higher better versatility. A PTZ camera is an excellent tool for watching large areas, such as parking lots, stadiums, junctions of major concourses within a building.

A PTZ controller is operated from a keyboard or joystick, and through the system software, an operator can switch among PTZs to control one, and then another, camera very quickly.

Another feature worth mentioning here is the auto-tracking function of some PTZ cameras. This is a setting that allows the user to set the PTZ function on automatic so that if a movement takes place within the camera’s view, the camera will track the movement, zoom in, and watch the movement until it is complete. It is a little more complicated than this, however, because a second movement, such as a car traveling in an opposite direction from another, may cause the auto-tracking feature to change over and watch the wrong car. Again, buyers should be cautious in selecting the additional functions. In most cases, there are downsides to making the wrong selection.

Technology Types

There are two basic types of technology that are used in the processing, or encoding, of images: analog, and IP (Internet protocol).

Analog Cameras

Analog is the tried and true technology that has been around since video cameras have existed. In the CCTV world, analog technology is used to transmit captured video footage to a digital video recorder (DVR) that encodes the captured images into digital format for viewing.

Analog cameras do not themselves encode, or digitize, the images. This work is done by the DVR, or a computer based DVR capture card.

IP Cameras

The IP camera is a newer generation of security cameras. Offering higher resolutions of 1, 3, or 5 megapixels, or even higher, many companies promote IP cameras as if analog technology will eventually go away. As a side note, high-definition (HD) technology in analog varieties is making analog very attractive still, primarily because of legacy issues and costs.

In the IP camera, the encoding is done at the camera. In other words, the image is digitized as it appears in the lens, before it is passed along to the network video recorder (NVR) where it is decoded for viewing.

One of the biggest advantages of IP cameras is that they can be implemented wherever a network already exists. There are downsides, however. Unless the bandwidth is large enough to handle the constant feeding of several IP cameras, a network can be slowed down considerably, causing a larger investment in infrastructure to be necessary. Bandwidth can be managed, however, by setting cameras only to show footage when certain triggering events take place.

A Misconception

One common misconception about choosing between IP and analog cameras is the notion that remote access, or viewing, is only possible by using IP cameras. This is simply not true.

Confusion exists on the issue because of the term “IP” and its common use in network jargon. Both IP and analog are capable technologies for offering remote viewing. The IP address of a DVR (analog) allows remote access so that cameras can be viewed over the DVR. IP cameras can be viewed remotely by going directly to an assigned IP address for the camera; however, in many cases, even in IP technology, it is more advantageous to go through the video management software at the NVR so more control can be gained.

Other Considerations

Wireless cameras are available for special needs. There are still infrastructure costs for transmitters and receivers, even though wiring is eliminated to the camera. Practicality is still a concern, and the application will dictate whether wireless is the answer.

Explosion-proof cameras are often brought into the CCTV discussion as well. One misconception about these cameras is that they will not explode if something like a plant explosion occurs. This is a misunderstanding. The meaning of “explosion-proof” is that the camera will not explode in special environments where gases might penetrate other types of housing and set off an explosion within the electronics of the camera. It does not mean the camera will survive a bomb. Explosion-proof cameras are, in essence, a tag placed on the types of housings, rather than the camera inside them.

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Video Surveillance Cameras

Written By:
Monday, March 21st, 2011

Today’s video surveillance cameras have made “leaps and bounds” in technological improvements compared to the cameras from just 10 to 15 years ago.  Not only that, but the camera’s prices have steadily decreased with the increase in technology.  All of this has lead to video surveillance cameras becoming a “household word” for family protection and safety as well as business protection and workplace documentation.

Original video surveillance cameras were based on analog signals.  These systems and components of the systems were often referred to as CCTV or Closed Circuit TeleVision.  CCTV was so named because although it closely resembled a typical television studio system, there was one major important difference.

Studio television cameras’ video signals were boosted by the broadcast station and sent via radio frequency via a large antenna.  Once the signal left the broadcast antenna, anyone with a receiver could pick up the signal.  Video surveillance cameras however, sent their signal along a cable, directly to a specific monitor and recording device.  In this respect, the system was a “Closed Circuit Television” system.  In fact, any system used for monitoring, surveillance, or security in this manner was referred to as a CCTV system.

Today, video surveillance cameras still operate on a CCTV based system, but to be accurate, we must redefine CCTV to make it somewhat looser in application.  Although modern digital video surveillance cameras also transmit their video signals via a cable to a Digital Video Recorder or DVR and one or more monitors, they also employ additional methods for transmitting their signals that must be taken into consideration of the definition of CCTV as well.

These cameras may also transmit their video data wirelessly via an on-board camera transmitter and antenna.  These cameras use modern day wireless technology often used in land-line based telephones such as 2.4 or 5.8 GHz technology or 900Mhz technology for broadcasting their signal.  These systems are designed to transmit their signals only a fraction of the distance of the older systems, as they are aimed at sending their signals to a nearby receiver, which is usually plugged in by cable, to a DVR and/’or monitor.

Another method that is employed today is the use of the Internet as a vehicle for networking and transmitting.  Both video surveillance cameras and DVRs have the capability for connecting to the Internet.  When they do possess this feature they are often referred to as Internet Protocol or IP ready, because they deliver their transmission using IP format technology.

Although it is true that individuals other than who the video images are intended for can gain access surreptitiously, the intent of these wireless broadcasts and Internet transmissions are directed to a limited number of very specific viewers.  Thus, although our definition for CCTV as now become a bit broader in scope, it is easy to see why even today, video surveillance cameras are often called CCTV cameras.

While we are on the subject of CCTV versus new video surveillance cameras, it would be prudent to mention that there is some carry over from the “analog days” of CCTV to the current “digital era” which can make the comparison of components or the selection of a system somewhat confusing.  This primarily involves the use of reference to the detail or resolution of the video image created by the camera and displayed by the monitor.

Electronic video images may show a varying degree of detail.  That is evidenced by the contrast between standard television broadcasts and those called High Definition (HD).  Television was originally displayed on a Cathode Ray Tube or CRT (also called the “picture tube”).  The CRT reproduced the image on its screen by shooting an electron beam horizontally at the rate of about 60 times per second.  To a large degree, the number of horizontal lines determined how detailed the video appeared.  The more lines, the smaller the lines, the greater the detail of the picture.

Today, however, most televisions are like computer monitors; they are either Liquid Crystal Displays (LCD), plasma, or Light Emitting Diode (LED) displays.  These monitors display tiny dots called pixels instead of horizontal lines, therefore, they can display a much higher detail picture.  Yet, many video surveillance cameras still specify their picture quality in terms of the older, horizontal line method.  Its important to know that the lower end of resolution or detail is from about 300 up to 650 TVL (TeleVision Lines).  Video surveillance cameras with 650 TVL displays can produce very high definition video images.

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CCTV Cameras Remotely Monitored

Written By:
Tuesday, August 24th, 2010

If you are looking for a security and monitoring system that can be viewed away from the site where it is being used you should consider using a CCTV cameras remotely monitored. These systems are useful for monitoring the home from work, the business while at home, or for any monitoring application where the user is not in the same location as the camera.

Before we talk about using a CCTV cameras remotely monitored, let’s go over a few basics. First, CCTV is an abbreviation for Closed Caption Television and actually has a slightly different meaning today than it did 15 or 20 years ago. Television broadcast stations use video television cameras to record their video images. Several years ago these cameras were analog video cameras. These images are enhanced and edited at the studio and broadcast using powerful antennas and radio waves.

Smaller but similar types of cameras were used for security and monitoring systems. They differed from television broadcast cameras in that their video signal was not transmitted through radio waves but via a video transmission cable that ran from each camera to the video recording unit. This created a closed circuit between the camera and the video recorder, hence the name Closed Circuit Television.

However, today CCTV has a slightly looser or different definition. Today most cameras are digital video cameras and they may transmit their images via a video transmission cable or via radio waves. Regardless of the method of transmission, a CCTV camera today refers to a camera that captures video and sends it to a monitor, recorder, or other private device that is not available for public access. In a sense it is still a “closed circuit” in that it is not “open” or available for public distribution.

How are today’s CCTV cameras remotely monitored? This is normally accomplished by using one of two different methods. Either the camera is a wireless camera that transmits its video signal and control data via a radio signal to a corresponding wireless receiver or the camera is connected to the internet and uses it as a network. There variations of these methods and we will attempt to briefly describe each one.

Wireless CCTV cameras remotely monitored normally have their own built in transmitter and antenna. These cameras send their signals using radio signals, the most common using the 2.4 or 5.8 GHz band technology that is often used for land-line based wireless telephones. Some boast ranges of up to 2.5 miles.

These cameras normally operate in such a way that their range is called Line Of Sight or LOS. This means that the range listed is the maximum specified range between the camera and the receiver unit using a Line Of Sight – where no objects stand between the two. However, that doesn’t mean that they will not function is there is something that impedes their LOS (such as a wall, window, building, etc.). If there is an object or objects that impede the LOS the camera usually functions but the range may be reduced. Exactly how much the range is reduced depends on the material the radio signal must pass through and how many objects exist. These cameras can be remotely monitored for this specific range.

Another example is Internet Protocol or IP ready cameras. These digital video cameras contain their own programming technology and server so they can be connected directly to the internet. These cameras can be remotely monitored around the world provided the user has access to a broadband internet connection. The user doesn’t even have to have a personal computer these days as the various electronic personal devices such as cellular telephones and wireless handheld video players can be used to monitor the cameras.

As for the older analog CCTVs? Even they can be monitored remotely. Older CCTV security and monitoring systems that require the coaxial video transmission cable can be connected to servers that connect them to the internet. These servers normally “capture” the analog video and convert it into a digital video signal. These files are normally extremely large so the server also uses programming to compress the file to make it quicker and easier to send over the internet. These servers make remote monitoring of analog systems just as easy as digital video systems.

So if you have a need to keep a watchful eye on your home or business while on travel, vacation, or simply away from the premises you should consider a CCTV cameras remotely monitored system.

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CCTV Camera Multiplexers

Written By:
Friday, July 23rd, 2010

A CCTV camera multiplexer is an electronic unit that is able to combine the video transmission signals from more than one camera into one single channel or transmission. These units are often used where processors, VCRs, Digital Video Recorders or DVRs, and monitors can only handle one input. The multiplexer, also known as a Mux, in essence reduces the multiple camera feeds by creating one output that combines all of the inputs to the multiplexer.

The multiplexer was originally designed to facilitate multiple analog video signals into one output signal for analog recorders. In other words, multiple analog CCTV camera signals were difficult to record simultaneously on an analog signal recorder such as a Video Cassette Recorder or VCR. The CCTV camera multiplexers provided an essential function of combining multiple analog video signals into one output. So instead of using four VCRs to record four different cameras, one VCR could be used.

Although CCTV Camera multiplexers were originally designed to accommodate the difficulty of recording or viewing multiple analog cameras on one source, they are not limited to analog camera use alone. Depending on the design of your system, multiplexers may be needed for use with digital video cameras and/or analog cameras.

CCTV camera multiplexers are available with a variety of multiple inputs and many different features as well. Each camera input to the multiplexer is usually called a “channel.” The most common CCTV camera multiplexers have four, eight, nine, or sixteen channel inputs. Most multiplexers connect to CCTV camera transmission cable using BNC connectors and are designed to use one output which is normally connected to a VCR.

Multiplexers may be either simplex or duplex in function. A simplex multiplexer can only handle the camera inputs, combine them in to one viewable output, and send that output to a device such as a monitor or VCR. A full duplex CCTV camera multiplexer has the same capability of the simplex multiplexer, however it not only allows recording from all the available camera inputs but can display the VCR tape simultaneously.

The majority of CCTV camera multiplexers provide the output display signal in full color. There are a few that are available in black and white only and most color multiplexers provide the option of displaying black and white.

If you are considering the purchase of a CCTV camera multiplexer, be sure to check the display resolution to ensure it meets your requirements. Video display resolutions vary widely between multiplexer units. Video displays of 2CIF (704 x
240) or NTSC 865 x 525 are fairly common.
Additional features may be found on individual CCTV camera multiplexers depending on the manufacturer, type, and other factors. Some of those features may include motion detection, timer and programmable switching, user defined and password protected camera masks.

CCTV camera multiplexers that include motion detection can be a big plus. Since the recording is often being done by a VCR, either additional tapes must be added when the current tape is filled, or a loop-able tape is used and when it reaches the end of the tape, it re-records over the beginning. If the multiplexer has motion detection, it often can be used to turn on and off the recording function of the VCR. If full time recording is not necessary (such as an empty parking lot) and recording is only necessary following a motion event (such as a car parking in the parking lot), this can save tremendous amount of VCR tape space.

Many multiplexers also come with timer and programmable switching. This function allows you to set recording times and cameras on and off. If your system only needs to record in the evening for example, you can program this on the multiplexer. In addition, programmable switching allows you to select what cameras you want recorded.

Password protected camera masks are another useful feature. Since your system contains more than one camera, there may be camera views that you prefer to be restricted to only certain individuals. You can create a camera mask to cover the other camera views so that only the cameras you choose are displayed.

CCTV camera multiplexers can be a useful accessory for any video monitoring and security system, especially older analog type camera systems. Multiplexers come in four, eight, nine, and sixteen input types with a variety of features to suit almost any need. Check with your digital security expert today to see what a multiplexer can do for your system.

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CCTV Outdoor Camera

Written By:
Tuesday, June 1st, 2010

 

cctv outdoor cameraA closed circuit television or CCTV outdoor camera system is used primarily for security surveillance. With today’s technology, the systems are user friendly and in some cases, can be installed and operational in a matter of hours. The systems can be hardwired or wireless. Several models are designated for indoor and outdoor use. However, cameras that will be used exclusively outdoors should be purchased with area weather in mind. Although, the cameras are designed for outdoor use, extreme cold or heat may have an effect over extended periods. For extreme conditions, you can purchase cameras that have built in heaters and cooling fans.

Any video camera that does not openly transmit a signal, but uses a dedicated receiver, can be considered a CCTV system. However, the term CCTV is predominantly associated with video security systems, which are used for surveillance purposes. Cameras on the system transmit to one or more monitors. Unlike broadcast television, where the signal is openly broadcast, cameras on a CCTV system only transmit to a designated set of monitors.

A CCTV Outdoor Camera System Can Be Found At

• Private Homes
• Banks
• Parking Lots
• Public Streets
• Casinos
• Industrial Complexes
• Apartment Buildings
• Hiking Trails
• Campgrounds
• Traffic Lights
• Airports

The list is by no means comprehensive and one must assume when in a public area they are under surveillance. As a rule, the monitoring is not targeted to any one individual. The CCTV system was invented in Germany in 1942 to monitor rocket launches. It was not until three decades later that the CCTV system was used for security purposes. The New York City Police Department was the first to use the camera system for crime prevention.

Primarily, a CCTV outdoor camera system is used as a crime deterrent. However, many law enforcement agencies use them in conjunction with facial recognition software to track known criminals. Thermal imaging or infrared cameras have been used by governments to monitor people coming into their countries to detect ill passengers. The CCTV system uses infrared technology to determine the body temperatures of disembarking passengers. Anyone with a temperature above normal might possibly have required additional screening before being allowed entry into the country.

In some instances, having cameras prominently displayed is not a deterrent. Therefore, airports, casinos and security checkpoints, for example, have security personnel whose only job is to monitor the cameras in real time. The security personnel would alert mobile guards of any problems they spot while monitoring the system. Small businesses and homeowners for the most part, would not conduct 24 hour monitoring of images in real time. High quality systems use digital video recorders or DVR’s that can continually record and archive images 24 hours a day. Lower end models might use a videocassette recorder or VCR. These require the user to change out the tapes every few hours. The users can still monitor in real time regardless of the status of the video recorders. Many small businesses to save money, would record over the previous day’s tape to prevent stockpiling tapes and to negate the need to purchase more blank tapes. This created problems if there were a need to view images recorded several days in the past. The images did not exist at that point.

Homeowners that are considering or have already purchased a CCTV outdoor camera system have security in mind. Owners want protection for their family and property. Having a quality system installed is a crime deterrent. The camera system will also provide conclusive proof of a crime, which greatly increases the chances of the offender being caught. The outdoor camera system can be one camera up to 16 or more. The number of cameras is largely dependent on the owner’s preferences, budget and size of the property. However, many models are quite economical and provide excellent security. You as a homeowner must decide on options such as pan, tilt, zoom, cctv outdoor camera on board heaters, coolers, two-way audio, recording in color and night vision. You also have the option of having a hard-wired or wireless system. Depending on your specific needs, some options may not be necessary.

A high quality wireless system can transmit up to a 1,000 feet. Lower quality or what are considered standard systems have a range between 300 and 500 feet. To give it some perspective a mile equals 5,280 feet or one kilometer equals roughly 3,280 feet. Large estates may require a hardwired system to ensure good image quality. Heavily wooded properties may also benefit from a hardwired system, as well. Trees, buildings and hills can interfere with the signal range. Cameras that advertise up to a 1,000 feet signal range may be less in reality. It is important whether you are having the system professionally installed, or doing it yourself, that you carefully account for these factors.

Hardwired systems require each camera be physically connected to the monitor. A video cable that transmits the video in many cases also supplies the power to the camera. This cable is usually called a dual use cable. The outdoor wiring must be protected to prevent tampering and to maintain the integrity of the signal. It is never a good idea to lay the cable along the ground. The wiring should be buried and sheathed in conduit suited for video cable. The cable will need to be protected as it enters the home, as well. Bury the cable up to the home and run the conduit up to a junction box that can be adequately secured. The cable must then be fed through the walls to the monitor.

The CCTV outdoor camera system must be weatherproof against, ice, snow, rain and mounted to withstand heavy winds. The cameras can be mounted on poles along the property’s perimeter. Ensure the cable is run inside the pole and not outside of it. Pole mounted cameras should have a bracket that extends the camera far enough from the pole to allow room for panning and tilting. Dome cameras can also be used if mounted properly. Dome cameras shield where the lens is pointing and the entire housing does not move with the lens as with box style cameras. Fixed cameras along the perimeter do not provide as much coverage, thus, there is a need for more cameras.

Fixed cameras can be used if they only screen visitors at a security gate. The camera is mounted to capture the faces of individuals that arrive in vehicles. In most cases, there would not be a need for panning or tilting. For maximum benefit, outdoor cameras should have night vision capabilities. This is particularly important for cameras located away from security lights along the perimeter. Many cameras have the ability to record quality images in low light. You can also use infrared cameras for areas with little or no light. Infrared cameras might be needed in heavily wooded areas where the overhanging foliage essentially blocks the sky. Infrared cameras have the ability to detect radiant heat from all objects, human or otherwise. Objects that do not give off radiant heat are ones with a temperature of absolute zero. The camera converts the heat signature into an electronic signal that passes through a series of components to develop a viewable image.

Typically, a room is designated as the monitor room. Because of the nature of hard wiring, the monitor must stay in a fixed location. The monitor can show one or multiple images at a time. Operators can randomly shuffle the images or fix and hold on one camera view. The camera’s options are controlled from the monitor room. Usually a joystick or the controls on the video recorder are used to operate the pan, tilt or zoom. Several systems have tracking capabilities. Once the motion sensor is tripped, the camera will track and automatically zoom in and out as the subject moves. Several systems can also be programmed to pan a predetermined coverage area. You may want a camera that just covers a driveway or access road on the property. The camera will only pan the roadway, trail or pathway per the programmed instructions.

cctv outdoor camera Wireless CCTV outdoor camera systems are very popular with many small businesses and homeowners. The system is easy to install and can be installed by the owner in most cases. The camera communicates with the receiver using radio frequencies specific to both devices. Many systems allow only four channels. This means you can only have four cameras, but you can purchase upgrades to extend the number of cameras to as high as 16 in some cases. The cameras can also be controlled by using your personal computer. Setting up the cameras is quiet similar to hooking a lap top computer up to the home’s wireless internet system using Wi-Fi technology.

The wireless cameras will require a power source. The system will include a power adapter for each camera. The cameras will be located outdoors so it is important that the cameras plug into a properly installed receptacle suitable for outdoor use. The cameras can be moved at any time as long as they are within range of the receiver. Most cameras will have a rechargeable battery pack. You can power the cameras with their batteries to cover a specific area for short periods, where there is not access to AC power.

The stated signal range of up to 500 feet for an outdoor wireless camera is based on ideal conditions. Therefore, the range is usually between 300 and 500 feet. The conditions include line of sight, heavy foliage, building or hills. All these things can interfere with the signal. Keep these conditions in mind when installing your system. Recommended options for your wireless system include pan, tilt and zoom for any camera that is located to cover a driveway or access road. Night vision is crucial, as well. When you or a family member is alone at night, or any time for that matter, it is important you have a clear set of eyes that can see beyond the front door.

It is recommended that you install a dome camera with night vision over the front door. The camera will monitor and record anyone near or at the entrance. It is important that you or your family identify visitors before allowing then into your home. The camera if mounted on the wall will have a limited coverage area. The camera should be installed on the ceiling of the porch or overhang.

Internet protocol or IP cameras can also be used with a CCTV outdoor camera system. Each camera has its own IP address and streams directly to the Internet. The server is usually a dedicated one for security purposes. The recorded data can be stored locally or by using a centralized video recorder. This allows multiple individuals access to the camera options and data. Using IP cameras allows you to install as many cameras as the network can handle. You can control the cameras, watch in real time or view recorded images from anywhere in the world. IP cameras are ideal for large estates, medium to large business or office and apartment complexes.

Whether they are hardwired, wireless or IP cameras the system is considered CCTV. The cameras do not transmit to anything other than their designated monitor, receiver or network server. Ensure the wireless system is properly protected against intrusions or signal interference. With today’s technology, the signal is usually shielded against interference by most common household devices. Wireless cameras use Wi-Fi technology and are connected to a home’s wireless network. Ensure you use the wireless provider’s encryption protocol. Typically, you are provided with an encryption key that must be used to connect any wireless device to the modem and or router for Internet access. Contact Security Camera Kings today to see if we have a CCTV outdoor camera that fits right for you.

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