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CCTV FAQ
CCTV FAQ
1. Graphic cards are said to have great influence on the DVR Boards. What graphic cards do you recommend?
2. What are the differences of RGB and YUV image signals?
3. What are the backup devices supported by the system?
4. Windows 98 uses the FAT32 file system, while Windows 2000/XP also supports the NTFS file system. Which file system should I use?
5. What are the precautions when recording sound?
6. What can be done about dynamic IP?
7. What are the miscellaneous precautions when installing your system?
8. Do I need a special PC or Monitor to view and operate the DVR from a remote location?
9. Do I need any other PC's to operate the DVR?
10. How does the PC monitor connect to my cameras?
11. How many cameras can I plug into a video capture card?
12. How much time does it take to install a DVR?
13. What happens in the event of a power outage?
14. What kind of cabling do I need to run from a surveillance camera to the DVR?
15. Are there really differences between cameras and lenses?
16. Are there differences among DVR software?
17. Can I use my existing cameras?
18. Can I view and record, real time/real-motion video on each and every camera?
19. Do I need any special power requirements for the DVR?
20. Do I still need my VCR if I purchase a DVR?
21. How come DVR manufacturer say their product records 30 frames per second (fps) yet it almost looks like still frames?
22. How come when I view a DVR remotely over the Internet the pictures don't have the same quality or speed as when I view it at the DVR location?
23.How come when I view only a single camera on a 30fps DVR it still does not look like real-time/real motion?
24. How come when I view some websites on the Internet with video they seem to have no robotic motions and clear crisp pictures?
25. How many days of recording can I expect a DVR to store?
26. How many frames does it take to give a real motion look?
27. What are real-time images?
28. What does a DVR look like?
29. What is a DVR?
30. What is meant by frame rate?
31. What is real motion?
32. Will a 60fps, 120fps or 240fps video capture board run faster on a single camera than a 30fps video capture board?
33. Can I record the images on a remote PC other than the DVR?
34. Can I zoom in with a camera?
35. Do I have to download software in order to view the DVR from a remote location?
36. How do I control a camera with Pan/Tilt and Zoom functions?
37. How do I view the camera images from my PC, laptop or PDA?
38. What is a web port and port number?
39. Are there differences in the DVR hardware components that affect the quality?
40. Can I view the DVR from somewhere other than the physical DVR location?
41. Do surveillance cameras work in the dark?
42. Does it matter what RAM is used in the DVR?
43. Does it matter whether I have a static or dynamic IP?
44. Does learning how to operate the a DVR require knowledge of PC's?
45. How can you protect the cameras from vandalism or being tampered with?
46. How do I protect the DVR from someone tampering with it?
47. How does a DVR store video that I want to save?
48. How much power is required for a surveillance camera?
49. If I connect remotely will I view live video?
50. What are real-time images?
51. What are the differences between hard drives?
52. What are the differences between microprocessors?
53. What are the differences between motherboards?
54. What are the differences between video capture cards?
55. What are the differences types of video compression?
56. What are the main components of the DVR?
57. What if a DVR has some of the latest components and some not as current?
58. What is a chipset?
59. What is a dynamic IP address?
60. What is a firewall?
61. What is a memory leak?
62. What is a motherboard?
63. What is a processor?
64. What is a static IP address?
65. What is a Super I/O Controller?
66. What is a video capture card?
67. What is a web port and port number?
68. What is an operating system?
69. What is bandwidth?
70. What is PPPoE?
71. What is RAM?
72. What is resolution?
73. What is video compression?
74. What resolution does a standard television have?
75. Where should I locate a DVR?
76. Will my cameras work with any TV monitor?
77. Do your systems connect with doors, windows, lights, power, sirens, motion detectors, or any other devices?
78. Can your systems be easily connected to a computer network?
79. Can your systems be connected to an alarm system, and when activated be able to connect and notify people through a phone, fax, page, or e-mail?
80. With your system, how many cameras can you view, and from how many locations on a single screen?
81. Do you Collect Customs Taxes and Fees?
82. Do you have a Catalogue?
83. Do heated housings use a regular 24v transformer type power supply?
84. Can the cameras that are installed in side of the heated camera housing plug into that power source without having to run a separate power source for the camera?
85. Do the mounting brackets attach the same way to the housing as they do to the camera?
86. Can all lenses available fit on all professional cameras?
87. Do your cameras and equipment come with all the necessary hardware for installation?
88. I want to run a wireless system, is there anything that I should know first?
89. Is it hard to hook up a Surveillance / security / CCTV camera system?
90. I don't know how to run wires for my surveillance / security cameras / system, who should I call?
91. Do I need professional CCTV installers to install my system, who would I call?
1. A:
- The first recommendation would be to use any newer high-end graphics cards like these - ATI RADEON 7000 64MB OR ABOVE OR Intel Video Extreme Graphics, 512MB, and only use them in a Windows XP environment.
2. A:
- RGB signalling refers to the method
of dividing an image signal to the fundamental three colors (Red, Green
and Blue) when processing the signal. It has the advantage of good color
division and conveyance, but the disadvantage of requiring at least 3
color division data.
YUV signalling refers to the method of expressing an image signal by the vertical and horizontal signal synchronization (Y), and its color signals(U, V). Color division and conveyance qualities are inferior compared to the RGB method, but the YUV method can express more diverse colors using less image data.
The choices of both methods are available on DVR. RGB images will have clearer color but more 'blocks' on the images, while with YUV images dividing between colors can be more difficult but you will get a more smoother looking surface from them.
3. A:
- Data backup devices include CD-RWs,
DVD-RAMs, DVD-RWs, DATs, etc. Any device that Windows recognizes as a
drive, and you can also backup on a network drive.
The unit of the data is 1 minute, and can only be viewed through the supplied backup viewer. Data backup is also possible on the Search program, where it can be saved in AVI format, making it conveniently viewable through the Windows Media Player (by enabling "View-Caption" from the menu, you can also conform information data).
4. A:
- Each file system has advantages and disadvantages to them, but we recommend the FAT32 method over the NTFS system. Using the NTFS system as your database can result in small data glitches.
5. A:
- With Windows 98 or 2000, Direct X
8.0 or better must be installed. Windows XP is supplied with Direct X
8.0. Soundcard configurations and usable microphones differ depending on
how many channels you use. Be sure to check your settings.
Num. of Sound Recording Channels, Num. of Soundcards, Soundcard Connection Method, Usable Mic.
1 Channel 1 Mic. input Ordinary or Amplified Mic. 2 Channels 1 Line or External input Amplified Mic. 4 Channels 2 Line or External input Amplified Mic.
6. A:
- Please see NO IP.com for more information on using a DDNS it's free and you wont have to worry about remembering your IP address anymore, and it works with a constantly changing IP address, very cool!
7. A:
- Make sure that the Capture Board driver is correctly installed. (Control Panels-System-Device Manager)
- Make sure that the Database (Volume) settings are correct.
- Be sure to choose the correct NTSC, PAL when installing your program.
- Check the cables connection on the capture board.
- Check the connection on the cameras.
- Make sure the camera functions properly.
- When possible, avoid using software that resides in the RAM. Especially, vaccines can be potential problems.
- Turn off screen savers when using the program (Control Panel-Display-Screen saver)
- Turn off energy savers when using the program (Control Panel-Display-Power)
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8. A:
- No. The remote DVR software works with any Microsoft Windows Operating system.
9. A:
- The DVR will operate on its own. If you would like to view the DVR in another location away from the DVR you will need an additional PC.
10. A:
- The cameras connect to the DVR through Rg59u cables and BNC connectors or through a RJ45 if it is a IP camera. It then outputs the signal to the PC monitor or to a CCTV monitor.
11. A:
- It depends upon the particular DVR system but typically anywhere from 1 to 32 cameras. The cameras typically plug into BNC inputs on the capture boards or sometimes capture boards come with a single video adaptor and use a "pigtail" cable which has multiple adaptors on one end and a single connection on the opposite end.
12. A:
- If you are replacing an existing VCR with a DVR it can be accomplished in a couple of hours. If you are installing a system from scratch then obviously there are several aspects of an installation that come into play. It is not much different than wiring for a computer network or wiring a phone system. You are basically pulling cable which consists of a video and power line which lead back to the "head" end where the DVR is located. In some instance a third wire carries audio. There are Siamese or All-in-one cables available that carry all the functions in a single cable so as you only have to pull one cable.
13. A:
- To protect the DVR you want to use a UPS power back up, which serves as a surge protection device and a power source for a limited period of time in the event of a power failure. If the power failure continues for an extended period of time, the DVR will intelligently shut itself down. When the power returns it will return to its mode immediately prior to the interruption of power.
14. A:
- Standard coaxial cable such as the one which runs in your home to connect with the cable company is highly recommended it is called RG59U cable. You need to connect a BNC connectors on each end. Try to keep distances under 600 feet and avoid close proximity to fluorescent fixtures or other electrical devices that may cause interference. For longer distances there are a variety of other solutions from RG56U to fiber optic cable.
15. A:
- There are significant differences and choices among cameras and lenses. Camera and lens selection is dependent upon your requirements. Indoor or outdoor, day or night, area to be viewed, environmental conditions, etc. Cameras can cost from hundreds to thousands of dollars and lenses can cost from $80 to several thousands. You can think of CCTV cameras in the same terms of traditional cameras where similarly camera body and lenses can cost from a few hundred dollars to thousands.
16. A:
- Absolutely, just as important as the hardware is the software that operates the hardware. The software that runs the principal functions of the DVR is driven by a database. The architecture and design of the database are crucial for system stability and speed of which it processes the data. Quite often poor database structure will slow down even the best hardware and in many cases, cause system crashes.
17. A:
- The simple answer is yes. Your existing cameras will work and simply plug into the back of the DVR which replaces the VCR. If your cameras are not so current you may want to investigate some of the newer cameras which are higher in resolution and may have more features. Typically, higher resolution cameras mean higher quality images.
18. A:
- The short answer is remotely it is highly unlikely, because the bandwidth is usually not large enough to accommodate real-motion video on a real-time basis. To view and record locally is possible on very few DVR systems, and depends upon several factors, such as the video capture board architecture and the DVR components. Real-motion viewing and recording for a 4 cameras system only requires 120fps viewing and 120fps recording. For a 16 camera system you would require 480fps viewing and 480fps recording. Newer systems like our advanced H.264 Next Gen compression model DVRs require 30-60% less HDD space, have smaller file sizes and allow for faster transmission over broadband / IE in 2 different stream types so if there is a low bandwidth issue you can use the secondary stream for remote viewing.
19. A:
- DVR's are low power consumption devices. Remember, they are in essence a PC. It is recommended that you attach a battery back up to the DVR to protect the hardware against power spikes, reductions or outages.
20. A:
- There is no need for the video cassette recorder unless you wish to store video on cassette for your own reasons. You can record on the VCR as well as the DVR at the same time. This type of back-up is practically extinct like 8 track tapes.
21. A:
- The vast majority of DVR manufacturers describe a system in terms of "shared frame rate" which is somewhat misleading. What that means is a 30fps system is 30 frames per second over the entire number of cameras being displayed. Therefore, a 16 camera system sharing 30 frames may yield less than 2 images per second. Unless you are using our new H.264 Next Gen compression model DVRs which allow you to adjust the FPS from 1/16th to 30 fps per channel with synchronized audio.
22. A:
- The answer is bandwidth. When you are viewing the DVR locally you are transmitting right from the DVR to your monitor without having to send the images over a network and worry about throughput. Throughput is the amount of data transferred from one place to another in a specified amount of time. The lower the throughput, the slower the transmission.
23. A:
- What the manufacturers often fail to tell you is that a 30fps video capture board is the "maximum" frame rate that the video will display. The maximum frame rate is what can be achieved prior to the introduction of other important criteria such as hardware and software processing and video compression and network connection speeds; either of which attributes to the degradation of the capture rate. A 30 fps capture board may lose as much as 20% of its capacity through software compression. Use our new Next Gen H.264 DVRs for DVD quality video!
24. A:
- Because the video is "streamed" meaning it is aggregated and then delivered on a delayed basis. Again, there is a difference between real time and real motion.
25. A:
- This is probably the single most difficult question with the most confusing of answers and where one needs to be very analytical and read the fine print. The answer is, there is no individual answer. So we need to break down the answer into components.
- Hard drive space
- Video compression method (MPEG, MJPEG, wavelet, h.264, etc.)
- Video compression rate - Kbps
- Number of frames per second being recorded on each camera
- Resolution of frames being recorded (320 x 240, 640 x 480, etc.)
- Is video being recorded full time or only on motion detection?
- How many cameras are being recorded
A DVR stores the video images on hard
drives. Storage capacity is dependent upon the amount of hard drive
space. Hard drives come in a variety of sizes. A DVR may have from a
single to multiple hard drives built-in. The DVR can be attached to
external PC-like devices called RAID (Redundant Array Inexpensive
Disks), which can virtually supply an unlimited number of hard drives.
The file size of the video images, vary radically from one video
compression method to another. To further confuse the issue there are
different flavors of the same video compression methods, and as such the
different flavors produce different file sizes.
Video compression rates can be adjusted within most DVR programs. The
more you compress the video the poorer (except with our H.264 DVR
systems), the quality of the video, but the faster the transmission
speed since the packet is smaller. Video can be compressed as many as
300 times or more.
If you require real motion video on a camera you are recording 30 images
per second. If you do not need to record in real motion you obviously
can save hard drive space proportionately by reducing the number of
images per second being recorded.
Images are made up of little dots (pixels). The pixels in an image make
up what is known as the resolution. The more pixels in an image (the
higher the resolution); the higher the quality of the image and the
larger the size of the file to be stored.
If video is being recorded only when motion is detected (if that feature
is available on a DVR) then you reduce the amount of storage
requirements.
If you are recording on multiple cameras then you increase
proportionately the amount of data being stored up to the maximum
capacity of the video capture board. If the video board capacity is 120
frames per second then it can never exceed that amount.
In a corporate or retail environment that is not high security and does
not require the highest of video image quality and utilizes motion
detection, using a 60 image per second (30fps) video capture board,
where they operate 8 - 12 hours a day, a 40GB hard drive should provide 3
- 4 weeks of storage. Remember, certain things can skew these numbers
significantly, such as blinking lights or something that causes the
video to continually record that may not be obvious to the eye.
The other extreme is recording using H.264, real motion, high resolution
recording, on a 240 frame per second video capture board (8 channel),
an use as much as 25GB per day for all 8 cameras.
Most claims for video storage capacity are usually accompanied by a
statement in parentheses that states "under normal conditions". Not
knowing what normal conditions are this would be normal conditions for
your application, regardless get a machine that will allow you to add
more HDD space if your conditions change.
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26. A:
- Industry standards typically speak of 30 frames per second as real motion video. Think of frames per second in terms of how a cartoon is made with cells or even think of the projector in a movie theatre where multiple frames pass in front of the lamp to give the appearance of "real motion".
27. A:
- Real time images are those images that are being transmitted as they happen, not to be confused with real motion. Unfortunately, the words real time and real motion are used synonymously within the industry. Just because something is real-time does not mean it is real motion. However that being said our New H.264 Next Gen DVRs (PC based or Embedded unit) can produce amazing quality "LIVE" video over low bandwidth.
28. A:
- There are principally two different profiles to DVRs. One looks like a VCR with the same mechanical buttons and On-Screen menus these are embedded units with the operating system on a chip on the motherboard inside the unit, they are "Idiot" proof and do not require most times to be updated like a PC based unit but allow for a "Flash" which updates the operating system and the other resembling a PC which operates with a keyboard and mouse. For the most part DVRs are the size of VCR's and PC's although with different configurations they can be designed significantly larger or smaller.
29. A:
- A (DVR) Digital Video Recorder is in simplistic form, a PC which acts like a VCR in that it has the ability to record and playback video images. The DVR takes the feed from a camera and records it into a digital format on a storage device which is most commonly the hard drive.
30. A:
- The frame rate is number of frames which are made up of images (2 images = 1 frame) that are being displayed or recorded over a specific period of time. Typically frames per second or "fps" is the specification most often used. Remember frame rate record and frame rate display are two different items. Just because it displays in real-time doesn't necessarily mean its capable of recording in real-time, unlike our New Next Gen H.264 DVRs which allow for Real-Time Record, Playback, Remote viewing, Remote Recording and Downloading of the video!
31. A:
- Real motion is video that when viewed looks natural and has no jerky motions of any kind whatsoever. Don't be confused by real motion vs. near real motion or real time.
32. A:
- The architecture of most video
capture boards is such that regardless of the total frame rate of the
entire video capture board you typically do not exceed 30fps per
individual channel, since there is usually only one "chipset" dedicated
to that channel. The purpose of higher frame rate video capture boards
is the ability to view playback at higher frame rates over multiple
channels.
For example on a 240fps video capture board you would view 8 cameras at an average maximum rate of 30fps, whereas on a 30fps capture board the same would be less than 4fps over each of the 8 channels.
33. A:
- This is one of the main features that is now being offered by most DVR's. You can record from wherever you are viewing, while continuing to record on the DVR. One does not interfere with the other. This is advantageous if during a robbery or burglary the intelligent criminal searches for the videotape or machine when they see a camera.
34. A:
- Yes, but you need to purchase a camera with that functionality built in. Comparatively speaking to fixed cameras these are expensive and typically cost on average from $1,000 on up.
35. A:
- This varies from manufacturer to manufacturer. You are able to view a DVR without having to use application software simply by using your Microsoft Internet Explorer browser. Application software though usually gives you features that are not available by simply using a browser.
36. A:
- PC-based DVRs usually have some sort of control in the software that operates like a joystick and by clicking the mouse over the appropriate function the camera responds.
37. A:
- Most DVRs come with remote software that has to be installed on your computer. The remote software allows you to view / record the cameras once you are connected to the DVR via a Internet connection, or Local or Wide-Area-Network connection. Our Concert Software used with our Next Gen H.264 Compression DVRs allows control of over 100,000 channels of video making it a true Enterprise Solution software.
38. A:
- A web port and port number are ways to identify a specific process to which an Internet or other network message is to be forwarded when it arrives at a server.
39. A:
- Almost each and every component of the DVR attributes to the ultimate performance and reliability of the product. Some are specifically performance related while others can be attributed to system longevity and stability. Sub-standard components will cause everything from slow viewing and playback to blurry images to catastrophic system failures.
40. A:
- Yes. The majority of DVRs these day will allow you to connect via a phone line modem, Internet connection, Local or Wide-Area-Network or through wireless means.
41. A:
- It depends upon the camera. Surveillance cameras, if they have Super Ex-view or infra-red (IR) capabilities can operate in a virtual zero light environment. We offer some pretty extreme cameras that can view in zero light conditions without the use of external IR, 0.00015 LUX.
42. A:
- Memory needs to work in tandem with the latest processors and hardware and software components in order to obtain the efficiencies they provide. All must function in unison and be "tweaked." The latest form of RAM memory is called DDR memory, which uses a special memory bus to greatly increase speed. DDR can run as much as 4 times faster than its predecessor.
43. A:
- Yes. If you are attempting to "call" the DVR over the Internet from a remote location and the IP address has changed because it is dynamic, you need a way to find out what the new address is in order to communicate with that DVR. You can Port Forward your Router so it allows communication with the DVR.
44. A:
- While knowledge of using a mouse and keyboard is helpful it is not required on embedded DVRs. Anyone can learn to operate and program any of the embedded DVRs functions, as the systems were designed with the "Friendly" user interface controlled by the front or a IR remote control.
45. A:
- Some cameras today can be purchased with a vandal resistant housing already built in. Otherwise, there are a variety of protective housings to resolve this concern.
46. A:
- The DVR can be placed in a locking chassis. Unfortunately someone can simply unplug the device like any other appliance. Many people either lock them in a room or closet with limited access or affix them in locking cabinets where access to the power supply is not easily obtainable.
47. A:
- There are several possibilities for storing data that you wish to archive and not erase. DVRs store the video images on its hard drive. Depending upon the amount of video you want to save you can store it on a CDRW, DVD, removable hard drive or other storage device.
48. A:
- The cameras are low voltage and no special requirements are necessary. Almost every cameras runs off a 12V or 24VAC volt power supply transformer that plugs into a traditional electrical outlet. Therefore, there technically is no need for an electrician, unless you want to hard wire the cameras into a 12V or 24V power supply box, just remember the longer the run it is recommended to use 24V so the power drop on the line won't be that bad.
49. A:
- The answer is you are viewing live video as it happens but the "motion" and the quality of the images are dependent upon your connection speed to the location and machine. Real-time video from a remote location using the public Internet is now possible if you want to simultaneously view multiple camera images, but you would be using our New H.264 Next Gen compression model DVRs to accomplish this. No matter what DVR you are using the Internet will always be the bottle neck.
50. A:
- Real time images are those images that are being transmitted as they happen, not to be confused with real motion. Unfortunately, the words real time and real motion are used synonymously within the industry. Just because something is real-time does not mean it is real motion.
51. A:
- There are two ways to measure the performance of a hard disk:
- Data rate - The data rate is the number of bytes per second that the drive can deliver to the CPU. Rates between 5 and 40 megabytes per second are common.
- Seek time - The seek time is the
amount of time between when the CPU requests a file and when the first
byte of the file is sent to the CPU. Times between 10 and 20
milliseconds are common.
The other important parameter is the capacity of the drive, which is the number of bytes it can hold.
52. A:
- The differences between microprocesso3rs are simply the amount of data it can process and the speed at which it can process that data. There are now Quad processors out on the market that operate at blinding speeds and technology seems to be doubling every 6 months to a year.
53. A:
- Although there are several items that make current generation motherboards different from their predecessors the most noticeable are the accommodation of a wider data bus with 64 bits. Bits are the width of the data highway that goes in and out of the processor. Think of the bus as the diameter of a hose, where the wider the diameter, the higher the water throughput.
Bus speeds and widths have increased due to faster processors and the needs of multimedia applications such as those used by the DVR. Typical bus names and widths are:
- Industry Standard Architecture (ISA) - 8 or 16 bits
- Extended Industry Standard Architecture (EISA) - 8 or 16 bits
- Micro channel Architecture (MCA) - 16 or 32 bits
- VESA Local Bus (VLB) - 32 bits
- Peripheral Component Interconnect (PCI) - 32 or 64 bits
- Accelerated Graphics Port (AGP ) - 32 bits
54. A:
- Some video capture cards are also
used for displaying the video as well as capture. Sharing the resources
of the capture card may be disadvantageous since it is using valuable
processing power and inherently causes slower transmission for a variety
of technical reasons, especially when trying to simultaneously capture
images from multiple cameras.
Video capture cards are usually described in terms of how many camera inputs it will support and how many images per second (ips) or frames per second (fps) (2 images = 1 frame) it is capable of recording. IPS and FPS are used synonymously.
Beyond these two basic reference points there are significant differences that are usually not described by most manufacturers. Just like a PC there are several sub-components that go into making the product fast, stable and efficient and can cause the price as well as the performance of the products to vary radically. So you need qualified people to build your DVR, it's not just as easy picking up a e-machine and dropping a DVR card into it.
55. A:
- JPEG and MPEG are the most commonly referred to expressions for image compression. JPEG refers to still digital images, while MPEG is a clip or sequence. Within these two standards are several variations. The newest compression on the market is our H.264 Next Gen compression which saves 30-60% in HDD space, has smaller file sizes to allow faster transmission through the LAN, WAN, Cellular or Satellite connection.
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56. A:
- The DVR's primary hardware components are the video capture card, central processing unit (CPU), motherboard and chipset, hard drive and memory. On the software side the components are the operating system and the user interface.
57. A:
- It is important to have the complete package of the latest components in order to receive optimum performance. The absence of one aspect of a current generation solution may "bottleneck" the system and in some cases even hinder the performance instead of enhancing. Additionally, the right combination of products, need to be tweaked for optimal performance.
58. A:
- Chipsets provide the support for the processor chip on the motherboard. The chipset is the heart of the computer since it controls and determines how fast and which type of processor, memory, and slots are used.
59. A:
- When the Internet was first conceived, the architects didn't foresee the need for an unlimited number of IP addresses. Consequently, there are not enough IP numbers to go around. To get around that problem, many Internet service providers use "dynamic" IP addresses. Dynamic IP addresses are addresses that are temporarily assigned to your computer from a pool for an Internet session or some other specified time. As soon as the session or period is complete the number is returned to the pool for use by another customer. Even if the user reconnects immediately, odds are they will not be assigned the same IP address from the pool. You can locate your IP address by typing in www.ip-address.com in your browser.
60. A:
- A firewall is simply a program or hardware device that filters the information coming through the Internet connection into your computer system or network. If an incoming packet of information is flagged by the filters, it is not allowed through.
61. A:
- Have you ever noticed that sometimes if you leave your computer running for long periods of time it starts to run slower and slower or even sometimes freeze up? This could be the result of a memory leak, which is a fairly common occurrence in operating systems. A memory leak occurs when a process (like an application or a service) allocates memory, never gives it back, and/or keeps spawning new threads. Leaks can vary in degree. Closing the application and re-starting the computer usually ends the leak.
62. A:
- Think of a motherboard as a scale model of a futuristic city with many modular plug-in buildings, each using power from a common electrical system and multiple-lane highways of various widths transport data between the buildings. The motherboard is the data and power infrastructure for the entire computer. The motherboard is the main board of the computer that everything plugs into.
63. A:
- The computer you are using to read this page uses a microprocessor (CPU) to do its work. The microprocessor is the heart of any normal computer, whether it is a desktop machine, a server, laptop or PDA.
64. A:
- A static IP is a number that is assigned to a computer by an Internet Service Provider (such as AOL, Roadrunner, etc.) to be its permanent address on the Internet. Computers use IP addresses to locate and talk to each other on the Internet, much the same way people use phone numbers to locate and talk to one another on the telephone. Every machine on the Internet has a unique identifying number, which consists of four groups of number with no more than 3 numbers in a group. A typical IP address would look like 192.142.168.100.
65. A:
- The Super I/O controller is a chip on the motherboard. Its main function is to control the floppy disk drive, keyboard, mouse, serial and printer ports.
66. A:
- A video capture card is a component inside the DVR which captures the video being viewed by the cameras and compresses the information and transfers that information to the hard drive for storage.
67. A:
- A web port and port number are ways to identify a specific process to which an Internet or other network message is to be forwarded when it arrives at a server.
68. A:
- An operating system is a piece of software. It's the first software we see when we turn on the computer, and the last software we see when the computer is turned off. The operating system loads itself into memory and begins managing the resources available on the computer. It then provides those resources to other applications that the user wants to execute. All desktop computers have operating systems, the most common of which are Windows, UNIX and Macintosh. One of the operating system's primary tasks is managing the hardware and software resources of the computer, as various programs and input methods compete for the attention of the central processing unit (CPU) and demand memory, storage and input/output (I/O) bandwidth for their own purposes. The operating system makes sure each application gets the necessary resources or can limit the capacity of each process in order to accommodate multiple users and applications.
69. A:
- Bandwidth in basic terms is the diameter of a hardware component or system and its data stream capacity. The larger the diameter the more data can be transmitted upstream or downstream. In order to fit more data in a smaller bandwidth, compression technology is used. Bandwidth becomes a factor in each aspect of video transmission.
70. A:
- PPPoE (Point-to-Point Protocol over Ethernet) is a specification used by many cable and DSL providers, which enables connecting of multiple computer users on a network to a remote site through a modem or similar device. Unlike dialup connections, all DSL and cable modem connections are "always on." Since a number of different users are sharing the same physical connection to the remote service provider, a way is needed to keep track of user traffic for billing purposes. The PPPoE specification allows an Internet service provider to monitor sessions for billing purposes.
71. A:
- Random Access Memory (RAM) is the best known form of computer memory. RAM is considered "random access" because you can access any memory cell on the computer directly if you know the row and column that intersect at that cell.
72. A:
- Resolution refers to the number of individual dots of color, known as pixels, contained on a display. On a digital display such as a PC monitor, resolution is typically expressed by identifying the number of pixels on the horizontal axis (rows) and the number on the vertical axis (columns), such as 320 x 240 or 640 x 480. Therefore, a 320 x 240 image is made up of 76,800 dots and a 640 x 480 image is made up of 307,200 dots or 4 times as many.
73. A:
- When video is digitized by the DVR, it can consume as much as 165 million bits of data every second, transmitting this amount of data is not practical. To get around this problem, a series of techniques - called "codec" (picture and video compression/decompression techniques) - have been derived to reduce this high bit rate. Their ability to perform this task is quantified by the compression ratio. The simple fact is, the higher the compression ratio, the smaller is the bandwidth consumption. However, there is a price to pay for this compression, our technology is that good and causes no degradation of the videos image, the bandwidth is what plays the major predator on the video signals. Therefore, there is a balancing act of trying to achieve the desired image quality along with speed.
74. A:
- A standard definition television signal for Digital TV is 640 pixels by 480 pixels for a total pixel count of 307,200. A traditional analog television does not feature a true pixel count since it is an analog format, which is stated in lines of resolution. The highest number of horizontal lines theoretically possible is 525 for analog NTSC but no analog televisions are capable of displaying the theoretical resolution. The maximum number of horizontal lines found is 480. In short, the 640 by 480 standard resolution format used for digital television achieves essentially the same resolution as standard NTSC (albeit with better picture quality and audio quality thanks to the digital signal).
75. A:
- A DVR has similar operating requirements to that of a PC. Typically, you want it off the floor to avoid moisture and in a clean and cool environment.
76. A:
- The camera gives a video output to any device that will take a video input. With a standard television chances are you would need an adaptor between the camera and the TV.
77. A:
- The DVRs have sensor inputs to trigger specific devices such as a motion detector or alarm system. They could also trigger an input from window, lights and other devices, but now with the capabilities of new equipment rising on the market, external boxes can control many devises from the DVR System.
78. A:
- All of our DVRs can connect to either internal or external networks, some over cellular and satellite.
79. A:
- Email or pager
80. A:
- Our New Next Gen H.264 PC Based / embedded systems come with a All-in-one multi-site software package to control over 65,000 channels of video from a single Client software platform, our Concert Software. In single user mode you can view 1-4-8-16-32 cameras at one time. If you need something larger we have a NVMP - Network Video Management Platform which will allow you to connect an unlimited number of CCTV security cameras, user etc... a TRUE Enterprise Solution.
81. A:
- WECU Surveillance.Com does not
charge, collect or pay duty or customs charges for packages shipped
outside the USA. However, Customs regulations vary by country and YOU
MAY BE CHARGED ADDITIONAL FEES FOR CUSTOMS DUTY OR GST (GOODS AND
SERVICES TAX) WHEN THE PACKAGE ARRIVES IN YOUR COUNTRY.
Please check with your local customs or postal authority regarding shipments from the US to your country to learn specific information regarding such charges.
82. A:
- We currently do not have a printed catalogue that we can send to customers, everything is online. By doing this, we can pass the savings on to you the client. The dynamics of our industry and the number of products we carry change some time daily.
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83. A:
-
Yes
84. A:
- In most cases you will need to run 2 power supplies one for the heater and one for the camera, unless the camera is a 24V model which will plug into the heated housing.
85. A:
- Make sure that you use the correct bracket for the job, one that mounts to the camera will not mount to the housing and use a rubber washer between the housing and housing mounting bracket to eliminate the possibility of Ground Loop problems
86. A:
- C mount lenses for box cameras are all interchangeable.
87. A:
- All our systems come with the necessary components for proper installation.
88. A:
- Wireless Analog CCTV cameras work best if they have a CLOS "Clear Line of Sight" You will not be so lucky to get a signal if you are wanting to install the cameras on the other side of a concrete wall and 5 interior walls. They do work well through standard walls within reason, but may have poor reception if there are wires and metal studs in the walls. If you have these situations it may be better to run wired cameras. You can have your local electrician run the wires and install the connectors if needed, and you can hook up the system. Also you may run the possibility of getting your signal hi-jacked if it is a analog signal, and people can spy on you without your knowledge. Recommended not to use wireless cameras on the interior of your home, unless they are IP cameras connected to a secured Network / LAN.
89. A:
- No, it is as easy as hooking up your VCR to your TV, if you have trouble with this, a good friend could lend you a hand, it is very simple.
90. A:
- You can phone a local electrician in your area, they can help you with this, the should have the necessary tools for the installation.
91. A:
- A local electrician can help you with this or may know of CCTV installers in your area, but for the most part you will not need one. With the electricians help, instruction manuals, and our help, you will be able to install any system.