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A security camera can come in many different styles including dome, bullet, infrared and c-mount. The security camera that will work best for your application will depend on several factors such as whether you will use the security cameras inside or out, during the day, nighttime, or both.

There are four types of lenses for CCTV use: Fixed Aperture, Manual Iris, Auto Iris, and Zoom. If the area you wish to observe experiences infrequent changes in light, use a manual iris lens, which can be adjusted for light only by hand. If the area the Security Camera will be observing experiences frequent changes in light, use an auto-iris lens. These lenses adjust to light changes automatically. Auto-iris lenses come in Video or DC, and cameras generally support one format or the other. Be sure your lens matches the camera. To perform close-ups, get a zoom lens, manual and motorized zoom lenses are easily available from most retailers.

This indicates that the power adapter no longer supplies an adequate power.

Please replace the adapter with the same voltage/amp rating (12V 1.5Amp).
GadSpot will replace the power adapter within the standard warranty period.

Please contact our support staff for details.

First, you will need to connect your DVR to your local area network using a router and standard RJ-45 Ethernet cable. Your DVR system will be assigned an internal IP address by your router, typically something like 192.168.1.25. You can get the internal IP address by opening your router configuration and checking for connected devices. Once you have your internal IP address, you can view any of your cameras from any computer on your network by opening Internet Explorer to your DVR’s internal IP, for example, http://192.168.1.25.

Next, you will have to open two ports on your router. The default ports are 9000 (for the camera streams) and 80 (for the Web interface). If these ports are not open, you will be unable to view your DVR from a remote location. To learn how to forward ports on your router, consult either your router’s manual or http://www.portforward.com. Remember that you need to forward these ports to the internal IP of your DVR system, which we discovered in the previous step.

Once you have successfully forwarded the ports, you can access your camera feeds by dialing in to your external IP address. To get your external IP address, simply visit http://www.whatismyip.com and write down your IP address, for example, 74.197.152.44. If you are on a cable or DSL connection, this address may change, so be sure to check once in awhile or use Dynamic DNS service. To view your camera remotely, you can open the corresponding URL in Internet Explorer, http://74.197.152.44, or you can use the included software that came with your DVR called Net-Viewer.

Remote viewing is available for both live and previously recorded feeds. Easily viewing your DVR feed remotely is just another benefit of using Gadspot for all of your DVR needs.

Measuring your camera's field of view is vital to knowing how many cameras you need in order to monitor your premises. Deciding the necessary field of view prior to purchasing cameras can ensure that your final camera arrangement offers complete coverage without blind spots.

Understanding field of view requires an understanding of how security camera lenses are marked. Typically, a camera will include documentation specifying its CCD size and lens size. Typically the CCD is marked as 1/4" or 1/3", but other sizes exist as well. Lenses come in all sizes from a few millimeters to 200 millimeters.

After determining your lens size and CCD size, visit http://www.sweeting.org/mark/lenses/cctv.php and select your camera information. The on-screen calculator will provide details about the angle of view that the camera will have. Remember that viewing angle is a three-dimensional aspect, and each lens configuration has a different horizontal AND vertical viewing angle. Be aware that the viewing distance increases far away from the camera, so avoid blind spots by placing every camera within the field of view of another camera.

If you have discovered blind spots in your camera configuration, increasing your camera field of view is a priority. The easiest way to increase your field of view is to simply add another camera or change the existing camera arrangement. If this is not feasible, or you have not yet purchased one yet, consider purchasing a camera with a smaller lens that has a wider field of view.

Please go to: http://www.gadspot.com/download/650TVL_OSD_Manual.pdf

• WDR (Wide Dynamic Range)
The wide dynamic range (WDR) function of a camera is intended to provide clear images even under back light circumstances where intensity of illumination can vary excessively, namely when there are both very bright and very dark areas simultaneously in the field of view of the camera. WDR enables the capture and display of both bright and dark areas in the same frame, in a way that there are details in both areas, i.e. bright areas are not saturated, and dark areas are not too dark.

• IP66 (International Protection 66)
The first digit (6) indicates the camera is dust tight giving complete protection against any solid matter entering the equipment. The second digit (6) indicates the camera is protected against powerful jets of water meaning that a powerful jet can be aimed at the camera from any direction with no harmful effect.

• TVL (Television Lines)
TV Lines are the standard measure of an analog TV's Resolution. Rather than represent discrete locations on a grid, as Pixels in a digital Frame do, TV Lines indicate the maximum number of identifiable changes that can be produced along a single (horizontal) Scanline of an analog TV.

• ICR (IR Cut Removable)
Almost all modern camera elements are sensitive to Infra-Red light, which gives an automatic advantage when designing a night vision camera. However, Infra-Red is also visible during the day, especially from Sunlight. The Infra-Red can be seen as a dull red glow. During the day, this wavelength of IR is interpreted by unfiltered IR cameras as a slight color shift, causing the image to deviate from true color.
Cameras with ICR work by implementing a physical Infra-Red filter that is removed by a small motor. When the camera enters day mode, the filter is placed in front of the camera element, filtering the Infra-Red and providing a true color image. When the camera enters night mode, the motor moves the Infra-Red filter out of the way resulting in a black & white night vision image. This provides the advantage of a night vision camera with superior image quality during the day.

• LPR (License Plate Recognition)
LPR is an image-processing technology used to identify vehicles by their license plates.

• AGC (Auto Gain Control)
AGC is basically a form of amplification where the camera will automatically boost the image received so that objects can be seen more clearly. In normal light conditions the camera will display a normal picture. However, when the light quality drops below a certain level the camera will begin to boost the signal to compensate for the lack of light.
The advantage of this technique is that your camera will produce images in much lower light conditions than standard. The downside is that the amplification is not only on the usable data in the image but also the background noise. This means that the more you amplify the more noise you will see and the poorer the image quality will be.

• DNR (Digital Noise Reduction)
Image noise is the random variation of brightness or color information in images produced by the sensor and circuitry of a digital camera. In signal processing it is any unwanted data that is produced as an unwanted by-product of other activities and is not used to transmit the signal. In video signals this comes across as fine static or "snow".
DNR technology compensates for this, correcting imperfections in the image by removing a large percentage of this noise.

• OSD (On Screen Display)
OSD is a control panel on a monitor or television screen that allows you to select options and adjust component.

• FOG (Fog/Water vapor)
Fogproof

• AWB (Auto White Balance)
White balance (WB) is the process of removing unrealistic color casts, so that objects which appear white in person are rendered white in your photo. Proper camera white balance has to take into account the "color temperature" of a light source, which refers to the relative warmth or coolness of white light. Our eyes are very good at judging what is white under different light sources, but digital cameras often have great difficulty with auto white balance (AWB) - and can create unsightly blue, orange, or even green color casts. Understanding digital white balance can help you avoid these color casts, thereby improving your photos under a wider range of lighting conditions.

• 3AXIS
3-axis for wall or ceiling mounting with flexible angle viewing

Depending on where you live, your country may use any one of three video standards:

* NTSC (National Television Standard Committee), developed in the U.S. in 1953, is used in North America, most of South America and Japan, and it provides video resolution up to 525 lines.

* PAL (Phase Alternating Line), developed in Europe in the early 1960s, provides up to 625 lines of resolution, and it’s used in most other areas of the world.

* SECAM (Sequential Color Memory), which also provides up to 625 lines of resolution, is much less common but is used in France and parts of Eastern Europe and Africa. (PAL usually works for SECAM.)

NTSC and PAL are not compatible. To make sure you’re choosing the right CCTV, be sure you know which video standard your country uses before you make your purchasing decision.


For your reference, to find out what video standard is used in your country, go to: http://www.gadspot.com.tw/download/signal_format.pdf

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