Learn more about CCTV

Below we tell you more about CCTV (Closed Circuit TV):

 

Vissior Knowledge Center

  1. What is the difference between a BNC and RCA connector?

BNC connectors:

The BNC (Bayonet Neill-Concelman) connector is a common type of RF connector used for terminating coaxial cable. The BNC connector is used for RF signal connections, for analog and Serial Digital Interface video signals, amateur radio antenna connections, aviation electronics (avionics) and many other types of electronic test equipment.

It is an alternative to the RCA connector when used for composite video on commercial video devices, although many consumer electronics devices with RCA jacks can be used with BNC-only commercial video equipment via a simple adapter.

There are three types of BNC connectors: screwing, soldering and crimping. BNC connectors could be found in silver-plated and gold-plated materials for protection against rusting in humid surroundings.

RCA connectors:

An RCA jack, also referred to as a phono connector or Cinch connector, is a type of electrical connector that is commonly used in the audio/video market.

RCA has been adopted for other uses than originally intended, including as a power connector, an RF connector, and as a connector for loudspeaker cables. Its use as a connector for composite video signals is extremely common, but provides poor impedance matching.

 

 

  1. What is infrared and how does that work?

Infrared (IR) radiation is electromagnetic radiation whose wavelength is longer than that of visible light (400-700 nm), but shorter than that of terahertz radiation (1 µm - 1mm) and microwaves (~30,000 µm). In situations where night time monitoring is required, infrared is used to allow the CCD cameras to capture motions in darkness. Most infrared illuminators come in 730nm, 830nm, and 950nm wavelengths, which are invisible to the human eye.

 

 

 

 

  1. How does the remote monitoring over the internet work?

Remote Monitoring is a new revolutionary technology, which allows the user to monitor their locations remotely. The new high speed transmitter lets you monitor the location at a faster frame rate than standard telephone line transmission.

Connect the CCTV equipments to your Remote Video Transmitter and the transmitter gets connected to a DSL/CABLE Modem with static IP Address. When you're ready to monitor the location, just open your web browser and type in the Static IP address in the Address bar, and you'll be connected to your Remote location instantly. You can access your location from anywhere in the world with the internet connection.

 

  1. What is the difference between CCD and CMOS?

A charge-coupled device (CCD) is an analog shift register that enables the transportation of analog signals (electric charges) through successive stages (capacitors), controlled by a clock signal. Charge-coupled devices can be used as a form of memory or for delaying samples of analog signals. Today, they are most widely used in arrays of photoelectric light sensors to serialize parallel analog signals.

Complementary metal–oxide–semiconductor (CMOS) is a major class of integrated circuits. Two important characteristics of CMOS devices are high noise immunity and low static power consumption. Significant power is only drawn when the transistors in the CMOS device are switching between on and off states.

  1.  
  2. What is difference between 1/3” and ¼” sensor chip?

CCD refers to the size of the sensor chip inside the camera that picks up light. The smaller the CCD chip, the narrower the angle of view. Therefore a larger 1/3” CCD will typically yield better picture quality than a smaller ¼” CCD with the same resolution

 

  1. What is the difference between auto-iris lens and a manual iris lens?

Manual Iris Lenses are perfect for indoor uses with constant light, such as interior of shopping centers, schools, libraries, and offices, because the iris setting of the lens only needed to be set once during installation.

Auto Iris Lenses are perfect for outdoor uses where light is constantly changing, such as parking lot, and building entrances. Auto Iris Lenses are powered through cameras power supply. The iris for these lenses automatically opens and closes according to the changes of the light conditions. If the light level is low, the lens iris opens up to allow enough light for optimum picture quality, and when the light level is high, it closes the iris so that incoming light does not overwhelm the camera and blur out the picture.

  1. Should I choose wired or wireless cameras?

Although wireless cameras appears to have no cables involved, but it does need to be connected to a power outlet. Also, most wireless cameras are limited to four different frequencies, which means only four cameras can be used at one location per frequency range. In order to expand the number of cameras per location, you must use a combination of different frequency ranges such as 900MHz and 2.4GHz, and it will allow you to use up to eight cameras per location.

Another point to consider when deciding to use wireless cameras is the objects located between the transmitter and receiver. Walls and metals between the transmitter and receiver would greatly affect the reception. Therefore, it is best to have clear sight line to minimize the interference and maximize the quality of reception.

 

 

 

  1. What is the difference ion view between the different lens sizes?

Lens Focal
Length

Distance between video camera and the video subject area

5' away

10' away

15' away

25' away

50' away

100' away

mm

Horz area

Vert area

Horz area

Vert area

Horz area

Vert area

Horz area

Vert area

Horz area

Vert area

Horz area

Vert area

2.45

17.3'

13'

34.6'

26'

51.9'

39'

86.5'

65'

173'

130'

346'

260'

2.80

14'

10.5'

28'

21'

42'

31.5'

70'

52.5'

140'

105'

280'

210'

2.97

12.3'

9.6'

24.6'

19.2'

36.9'

28.8'

61.5'

48'

123'

96'

246'

192'

3.60

7.5'

5.7'

15'

11.4'

22.5'

17.1'

37.5'

28.5'

75'

57'

150'

114'

3.70

7.3'

5.5'

14.6'

11'

21.9'

16.5'

36.5'

27.5'

73'

55'

146'

110'

4.0

6.6'

5'

13.2'

10'

19.8'

15'

33'

25'

66'

50'

132'

100'

4.30

6.1'

4.6'

12.2'

9.2'

18.3'

13.8'

30.5'

23'

61'

46'

122'

92'

5.0

4.7'

3.5'

9.4'

7'

14.1'

10.5'

23.5'

17.5'

47'

35'

94'

70'

6.0

3.8'

2.9'

7.6'

5.8'

11.4'

8.7'

19'

14.5'

38'

29'

76'

58'

8.0

2.9'

2.2'

5.8'

4.4'

8.7'

6.6'

14.5'

11'

29'

22'

58'

44'

12.0

1.9'

1.5'

3.8'

2.8'

5.7'

4.5'

9.5'

7.5'

19'

15'

38'

28'

16.0

1.4'

1.1'

2.8'

2.2'

4.2'

3.3'

7'

5.5'

14'

11'

28'

22'

25.0

1'

0.7'

2'

1.4'

3'

2.1'

5'

3.5'

10'

7'

20'

14'

50.0

0.4'

0.3'

0.8'

0.6'

1.2'

0.9'

2'

1.5'

4'

3'

8'

6'

 

 

 

  1. What is Ex View?

EXview HAD CCD is a trademark of Sony Corporation. EXview HAD CCD is a CCD that drastically improves light efficiency by including near infrared light region as a basic structure of HAD (Hole-Accumulation Diode) sensor.

EXview HAD CCD structure has made it possible to use as video information the charge of near infrared light which was hitherto invalid.  This resulted in a dramatic region improvement in sensitivity.  This in turn made it possible to film in the dark by radiating near infrared light which is invisible to the naked eye onto the object being filmed, which opens up applications in a broad range of applications, such as surveillance cameras, on-board cameras and scientific measurement cameras.

 EXview HAD CCD (Black and White mode)

 

 Conventional CCD (Black and White mode)

 

 

  1. Can I install a video security system myself?

It is easy to install a video security system by yourself. Simply follow the steps below:

To install a surveillance camera system there are four elements needed:

1-     A Digital Video Recorder Card (DVR). This is what records motion video to your hard disk.

2-     A PC that has an available port to install the card.

3-     A surveillance color camera (Ex. Vissior XS series, XR series, Naviview series and more)

4-     A Camera Bracket plus the mount for the wall or ceiling.


Steps:

1-     Connect the couplers to the cables. You can buy cables that already have a coupler connector but if you do that you should be aware that they only sell them in certain lengths. For example if it’s only 25 ft you will not be able to customize them. So if you decide to buy them already together measure the distance between your PC and where you will connect the cameras. Professional camera installers use the cable in big roll then cut it and connect it to the coupler connectors as they work, this way they customize the cable length and don’t waist cable.

2-     Installing the DVR card inside your PC. Before you install the card, check the specs of your PC and be sure that they meet the minimum requirement for the DVR card you have, the requirement should be located in the DVR manual.

3-     Insert the CD that comes with your DVR card inside your PC and run the Wizard Installation. Follow the steps one by one, just clicking next after finishing each step until the installation is completed. This will install the video and the audio for the cameras. Most cameras come with video audio feed. A special note here would be to check with your States’ regulations about audio recording people without their approval; it is ILLEGAL in some states.

4-     After the software part is completed, now it is time to install the hardware. Turn your PC off and unplug the power cable from the PC. Insert the DVR card inside a free slot in your PC, be certain that the card is inserted all of the way, screw it in and plug the connector dangles to the DVR car port.

5-     Before you hang up the camera, run a test first while it’s still near your computer. Plug the video with video and the audio with the audio. Then connect the power, the AC adapter to the cable that is connected to the camera and turn your PC on.

6-     Open the surveillance software located on your PC. You will see the video motion if every thing is installed correctly and all the cameras are working fine.

7-     Wiring it consumes most of the installation time. Go ahead and hook the cameras on the mounts on your walls and route your cables to the cameras location.

 

  1. What is a PTZ camera?

Pan, Tilt Zoom (PTZ) Cameras, often referred to as dome cameras, are cameras that can be moved left to right, up and down and zoom in and out via a computer, DVR, or PTZ joystick. This type of surveillance camera is often found at retail stores and allow the operator to follow a person as they move about or to zoom in on someone's face, a license plate, a cash register etc.

The total zoom capability of PTZ security cameras is actually a combination of digital zoom and optical zoom. Digital zoom uses electronics to zoom in and out while optical zoom uses lens motion. The total zoom of a camera can be calculated by multiplying the digital zoom by the optical zoom.

  1. What is a box camera?

A box camera is a box shaped camera that allows you to select the type of lens that you need to best suit your surveillance application.

 

 

  1. What is a dome camera?

Dome Security Cameras are named for their dome like shape. Dome Cameras are commonly used in surveillance systems inside of Casinos, Retail Stores, and Restaurants. Because of their dome shape, it is difficult for someone to tell which direction the lens of the camera is pointing. Dome cameras can efficiently move in all directions, including 360 degree rotation and viewing straight down. Dome cameras utilize auto-flip to view something directly below it. Auto-flip allows the security cameras to rotate automatically when something passes directly below it, ensuing that the object or person remains upright on the viewing screen.

 

  1. What is pinhole camera?

A pinhole camera is a miniature CCD image board with a lens opening of 1-3mm. The cameras in this category range in size from as small as 15mm x 15mm to as large as 2" x 2". Yet they produce real-time images similar to a camcorder. They are connected to a recording device just like a regular hidden camera and sending the video images being recorded to your device of choice (TV, VCR, computer monitor, camcorder or transmitter). They come in at the size of a quarter and it’s easy to hide them anywhere.

 

  1. What is a bullet camera?

Bullet Security Cameras are small Video Cameras that are shaped like a rifle bullet. These cameras are typically the width of a cigar, but they are shorter. Infrared Bullet Cameras are larger in diameter than standard bullet cameras. Bullet Cameras easily mount on ceilings or walls. The main advantage of Bullet Cameras is their low cost and small size. Although they have a low cost and are very small, they still provide excellent Picture Quality and Video Recording.

 

  1. What is a Siamese video cable?

Siamese Power/Video Cables runs both power and video in the same cable sheath.  The video side is RG59 and the power side is 18/2. The outer sheath is weatherproof and UV resistant. This is a much higher quality cable than normal pre-fabricated Power/Video Cables.

 

  1.  Why should I choose a box camera versus IUR camera like the XR-Pro?

 

 

 

 

 

  1. Is a stand alone DVR recorder better than a DVR card in my computer?

DVR Cards turn a personal computer into digital Video Surveillance Systems. Video can be recorded basing on schedule, continuous, and motion detection recording. You can store video clips on the systems hard disk drive or any optical storage device by.

 

What does NTSC mean?
NTSC is an abbreviation for the National Television Standards Committee. The term "NTSC video" refers to the video standard defined by the committee, which has a specifically limited color gamut, is interlaced, and is approximately 720 x 480 pixels, and 30 frames per second (fps). This standard is used in North America.

What does PAL mean?
PAL is an abbreviation for Phase Alternating Line. This is the television display standard that is used mainly in Europe, China, Malaysia, Australia, New Zealand, the Middle East, parts of Africa, and other parts of the world. PAL uses 625 lines per frame and a frame rate of 25 frames per second.