At EzTech Resources, we have carefully selected a wide range of quality products for all of our solutions which include but are not limited to brands like SONY, Panasonic,Samsung,,Vzor, ADT, SECOM, ETC Our customers' safety is our priority and we make every effort to ensure that we provide this through our experience and the high standard of service.
"It's cheaper to install a quality security system than to pay for the damages after the crime has been commited."
Hassle Doom (Sony/Sharp Low-Lux Chips)
**Design, price & specification are subject to change without piror notice**
Dome cameras can be easily surface mounted to the wall or ceiling.For future maintenance purpose, the dome can be easily removed from the mounting base without the hassle dismounting the mounting base from the wall or ceiling
The dome can rotate in horizontal axis in order to obtain the best viewing angle without the hassle of
removing the dome cover.
NIGHT VISION WEATHERPROOF IR CAMERA
**Design, price & specification are subject to change without piror notice**
These infrared cameras are ideal for surveillance of low light areas or completely dark areas. When there is sufficient of light, it will display color images. When during low illumination or complete darkness, the infrared LEDs surround the lens and shine infrared lights, illuminating the scene.
removing the dome cover.
NIGHT VISION WEATHERPROOF IR CAMERA
**Design, price & specification are subject to change without piror notice**
These Infrared Cameras come with Weatherproof Housing and Brackets ideal for outdoor surveillance and minimal your expenses.
DVR (Digital Video Recorder) or Domestic VCR
DVR
A digital video recorder will take analogue images from a cctv camera, digitise them and store them electronically. The most common media for storage is a hard disk drive as used in most personal computers.
Most DVRs now come combined with multiplexer and motion detect functions and are generally considered the future of cctv recording.
DVRs can generally be split into two groups - standalone black box and PC-based solutions. PC-based solutions are discussed in their own section.
Advantages
All-in-one box for recording, multiplexing, alarms and motion detection, making the installation of a cctv system much simpler.
Higher resolution than S-VHS VCR is possible
Near instant access to recording from known time and date
No loss of quality when copies taken
Large storage capacity eliminates the need to frequently change tapes
Can record events in real-time before an alarm actually occurs with "Pre-event trigger"
Enhanced playback function, forward and reverse frame by frame playback
Easy to connect to networks/internet for remote viewing and playback.
Disadvantages
At first glance the cost seems high but taking into consideration the cost of separate units of recorder, multiplexer, alarms and motion detect the all-in-one box now proves to be a viable solution.
Most DVRs now come combined with multiplexer and motion detect functions and are generally considered the future of cctv recording.
DVRs can generally be split into two groups - standalone black box and PC-based solutions. PC-based solutions are discussed in their own section.
Advantages
All-in-one box for recording, multiplexing, alarms and motion detection, making the installation of a cctv system much simpler.
Higher resolution than S-VHS VCR is possible
Near instant access to recording from known time and date
No loss of quality when copies taken
Large storage capacity eliminates the need to frequently change tapes
Can record events in real-time before an alarm actually occurs with "Pre-event trigger"
Enhanced playback function, forward and reverse frame by frame playback
Easy to connect to networks/internet for remote viewing and playback.
Disadvantages
At first glance the cost seems high but taking into consideration the cost of separate units of recorder, multiplexer, alarms and motion detect the all-in-one box now proves to be a viable solution.
Domestic VCR
The simplest low-cost solution is to use a domestic VCR. These will typically give 8 hours recording time and can be used in conjunction with Video Remote Control module to provide event-only recording.
Advantages - very low cost. Worth considering purchase of a dedicated VCR for camera recording. The dedicated VCR can be hidden in the attic or a cupboard making it less likely to stolen by an intruder.
The simplest low-cost solution is to use a domestic VCR. These will typically give 8 hours recording time and can be used in conjunction with Video Remote Control module to provide event-only recording.
Advantages - very low cost. Worth considering purchase of a dedicated VCR for camera recording. The dedicated VCR can be hidden in the attic or a cupboard making it less likely to stolen by an intruder.
Disadvantages - most domestic recorders have a slow "take-up" time. (the time taken to start recording)
- cannot use the VCR to record TV channel whilst camera input is selected.
Time-lapse VCR
Similar to a domestic VCR but with a slower-moving tape that records the camera pictures as snapshots at split second intervals. The time-lapse can be set to give 24, 240 or 960 hours of recording on standard VCR tapes.
Advantages - very long recording time, cost-effective. Added features like alarms, auto tape-rewind.
Disadvantages - the longer the recording time the longer the period of time between the snapshots.
PC-based Systems, Digital CCTV Systems
If you already have a PC then with the addition of a video-capture card and surveillance software you have a powerful digital system. Some professionals are critical of such systems as it is difficult to guarantee the compatibility of the card and software to the PC. Conflicts may occur with other programmes. If you are buying a PC purely for camera monitoring and recording then you are probably better off choosing a dedicated digital recorder.
However, the purchase of a video capture card and software is a very cost effective method of providing a high specification system.Advantages
- Easy to expand 2 ports to 4, 8, or 16 ports. Simply buy another card
- Software allows many configurations for monitoring e.g. quad display- Records in real time, simultaneously from all cameras
- Time and date stamping with motion detect
- Alert wizard, send email with photo or video clip,
- Mobile phone alert with voice,
- SMS alert
- Audio alert
- MMS alert
- Guard alert (Sends live video to a remote recorder or security monitoring company)
- Connect to Alarm panel
- low cost (All-in-one solution with the need for separate motion detect, splitters, quads or multiplexers)
Disadvantage
PC hard drive must have enough free space to record the camera pictures.
It is easy to see the benefits of the PC-based system providing you satisfy the following criteria:Competent in installing additional hardware and software programmes
Have good housekeeping to ensure adequate free disk space
Do not intend to use the PC for any other video capture or editing
Do not wish to mix colour and monochrome cameras
Better Picture with the better signal cable
The most common method used on professional installations is RG59 Coaxial cable. The centre core is the signal conductor while the outer shield protects the signal from electro-magnetic interference. It is a low-loss cable which will allow cable runs of up to 250 metres. Longer cable runs can be achieved with the use of a video amplifier.
BNC connectors are the preferred type of connector in professional CCTV installations and are recommended by 2seetv for all DIY CCTV applications. The connectors twist and lock together giving secure connection.Professional switchers, multiplexers, monitors etc. will all use BNC connectors. If you are connecting to a domestic TV or VCR you will need to convert to phono or SCART connectors. Simple adapters are available and are supplied with many of our kits.
Increasingly popular for CCTV installations is the use of RJ45 composite cables. These look similar to a telephone extension cable but are terminated in a RJ45 connector. A simple adaptor is used to provide a BNC, Phono and a 2.1mm DC power plug connector. This means that one cable can be used to carry the video signal, audio and DC power.
This type of cable is more flexible than RG59 cable and its small size makes it suitable for running along the top of a skirting board or around a door frame.
Many DIY CCTV products do not use coax cable and BNC connectors. The cable is more expensive and the connectors are difficult to fit. We can supply a range of ready-made coax/BNC cables that price match most RCA/Phono type cables.
It is advisable to keep cable runs as short as possible. Most of our camera kits offer a choice of cable length at no additional cost. Unless you are experienced in refitting a crimped BNC connector we do not recommend you cut the cable. Before ordering a camera kit measure the required cable run. Select the required cable length from the drop-down box. BNC cables can easily be joined together with a coupler such as CCA-005.
High-quality cameras with anti-mist coating, CCD lenses will give clear, crisp, noise-free pictures. It is essential to use good quality cable if these images are not to deteriorate. For CMOS cameras the quality of cable is less important.
Increasingly popular is wireless transmission. Government regulations now allow licence-exempt systems that can typically transmit signals up to 100 metres in line of sight. This reduces to approximately 30 metres when used indoors. Simple wireless cameras will only work on one frequency so you cannot use 2 such products within 100 metres of each other. Cameras and receivers are available with 4 selectable channels making multi-camera systems feasible.
Even the small covert type of camera can be supplied with its own built-in transmitter. Alternatively, any camera can be connected to a stand-alone transmitter.
Remember that CCTV cameras require power to operate. The voltage is usually in the range 9-12V DC and this is typically derived from a small power supply plugged into the mains supply. So "wireless" does not mean totally "wire-free". Battery operation will be measured in hours, so is not suitable for permanent installations. However, it is often easy to pick up the power for the camera in some areas such as the loft of the house. Wireless systems are great where it would be difficult to run the video cable back to VCR or monitor.
Wireless transmission is also useful for temporary monitoring of an office or reception area. The miniature wireless cameras with battery power can be fitted to model aircraft or model trains. The receiver can be connected to a domestic camcorder to recorder the "ride-on" experience.
How to display the picture from more than one camera
Most CCTV systems deploy several cameras so a method is required to view and record the images. Simple, says the professional, use a video switcher, a quad or a multiplexer. The good professional will survey your property and advise accordingly. Here are the simple benefits of each system.
SwitcherA CCTV switcher is a unit that changes between camera pictures one at a time, the output being viewed on a monitor or passed to the recording device. As switchers can use any VCR to record in true real-time, the pictures which are captured can be of a very high quality. Many professionals under-rate switchers. The fact that they provide true real-time recording unlike a snapshot from a multiplexer means they provide a superior picture quality. This can sometimes outweigh the disadvantages that switchers can only record one picture at a time.
When to use a switcher
Use for low cost systems
Advantages - Simple, low cost, good quality real-time pictures.
Disadvantage - Can only record one camera at a time.
QuadsplittersQuad units enable 4 camera pictures to be displayed on a screen simultaneously.
When to use a quadsplitter
They are useful where it is necessary to monitor several areas at the same time. As with a switcher, what is seen on the monitor is the picture that is recorded on the VCR.
Advantages - Simple to use - shows multiple displays
Disadvantage - Records only 1 camera at a time or 4 at a quarter of the screen size
MultiplexersA multiplexer allows simultaneous recording of multiple full-sized camera pictures on to one VCR tape providing more comprehensive recorded surveillance than with a switcher or a quadsplitter. Most have variable display options such as quad and picture in a picture allowing flexible surveillance of more than one camera at once.
When to use a multiplexer
Generally use when a high degree of surveillance is required and it is necessary to record full-size pictures from a number of cameras at the same time.
Advantages - Records all camera pictures full size on one tape - gives better monitoring of areas simultaneously - enables large areas to be monitored without losing surveillance due to camera switching time.
Disadvantages - Does not record in real time - Raises the overall cost of the system.
More on Multiplexers
Video multiplexers overcome the problems of both switchers and screen splitters. The pictures from the cameras arrive at the multiplexer unsynchronised. i.e. they all start and end their picture at different times.
These signals cannot be recorded directly because a VCR needs to be synchronised to the incoming video signal. If the incoming video signal is constantly changing then the VCR would be permanently re-synchronising to the new video signal. This can take up to 1 second to achieve.
Multiplexers digitally grab pictures from each camera in turn and feed them out to a video recorder at exactly the correct rate for them to be recorded reliably. Hence, up to 50 different pictures can be recorded every second and from any of the cameras connected to the multiplexer.
Functions of Video Multiplexers
There are three main functions a video multiplexer can perform:
Encoding - taking a single picture from each camera in turn and feeding it out to a video recorder in rapid succession.
Decoding - playing back previously encoded recordings showing only the selected camera for display
Multi-screen - showing live pictures in many different formats including PIP (picture in a picture) and split screen up to 16 ways.
Types of Video Multiplexers
Simplex - capable of performing any one of the above functions at any one time.
Duplex - capable of performing any two of the above functions at any one time (normally encoding of cameras and generating a live multi-screen picture).
Duplex multiplexers can simultaneously record and play back but this will require two video recorders.
Triplex - capable of performing all three functions at the same time (simultaneous recording and playback of cameras and a multi-screen display with both live and playback images). This allows the operator to keep monitoring the site whilst reviewing previously recorded tapes.
Added Functions of Multiplexers
Since the images are digitised it is easy to add the function of motion detect. Most multiplexers also offer alarm input and output modes.
