Radar Vision system developed by CBC Europe Ltd. integrates advanced radar technology and C-AllView Dual thermal and optical cameras, which allows a full-range monitoring effective 24 hours a day and in all weathers, within an eight hundred meter radius.
Samsung Techwin has developed SGR-1 Security Guard Robot. This device consists of scanning and tracking modules. The first one consists of a high-resolution camera and thermovision camera, which in the case of finding an intruder sends information to the second module, still monitoring the entire area. The tracking module is equipped with high-resolution camera, infrared illuminator and laser target positioner. In addition, it is possible to mount weapons, which enables the operator not only to observe the situation but also to "respond" to the trespasser or enemy.
Developed initially for use in the Korean Demilitarized Zone (DMZ), the SGR-1 robot can also be used in areas where unexpected intrusions often call for an immediate action.
You are welcome to watch the promotional video of SGR-1.
- a multimedia tale
There will be 3 prizes:
- III. Satellite receiver Ferguson FK-8500 HD.
However, in the case of designing new installation it is recommended to supply two independent cables to each antenna outlet. This solution provides more flexibility, the SAT and CATV signals don't need to be combined in the multiswitches, they are available in the R694140 outlet in separate connectors.
The most flexible multiswitch installations in multi-story buildings are based on 9-cable system. On each floor there is a splitter providing signals to the multiswitches. It allows to shape the network according to actual requirements - there can be deployed practically unlimited number of outlets.
As an example: - According to the developer's requirements, each apartment has been equipped with one satellite cable. But after a year, many or the residents have bought twin PVR receivers and want to get next signal. The solution is simple - on the floors where we need more cables we change the multiswitches for more capacious ones - the rest of the installation does not require any change and the whole system functions normally.
Professional multiswitch systems
- return loss
The core wires are fastened with individual screws, the braids are clamped down with another screw.
Subscriber Terminal Outlet: Signal R-TV-SAT
Networks with SAT signal and terrestrial signals.
Attenuation ca. 3dB
Outputs: 1xTV, 1xFM, 1xSAT
Subscriber Terminal Outlet: Signal RTV-SAT-R (return path)
Networks with 2 SAT signals, terrestrial signals, and/or return channel.
Attenuation ca. 3dB
Outputs: 1xTV, 1xFM, 2xSAT
Subscriber Terminal Flush Outlet: Signal TV-FM-SAT / RJ-45 / RJ-11
Networks with SAT signal and terrestrial signals, LAN and/or phone lines.
Attenuation ca. 3dB
Outputs: 1xTV, 1xFM, 1xSAT, 1xLAN, 1xphone
ULTIMAX - DVRs for demanding customers - looking through the archives. ULTIMAX DVRs can be fully managed via computer network, ensuring reliable operation. The compression method (H.264) and refined software allow to perform effectively remote video surveillance.
Configuration, management, and playback of the video (also the archived images) is the role of Remote Client Software. The manufacturer has also enabled the users to control the system via Internet Explorer (majority of the functions).
There is also available another "player" for playing back the archives, equipped with a number of useful functions, e.g. conversion of video files into AVI format, browsing the video at various speeds, including frame-by-frame analysis, saving pictures in bmp or jpg format.
The archives can be transferred via the network or backed up to any compatible data storage device (flash memory, hard drive, DVD recorder etc.) connected to the USB port or SATA interface.
The solution has been chosen as superior to analog system with 550 TVL cameras. The fact that images from megapixel cameras can be further zoomed, gives the IP system an advantage of reducing the number of cameras.
The station is monitored with five outdoor cameras ACM-1231 K1511 and two indoor cameras ACM-4201 K1514. In this way, the images from each monitored point are recorded with a resolution of 1.3 Mpx - the pumps, cash desk and the store. High resolution of the images allows to read license numbers of the cars, values and number of the banknotes at the cash register, as well as make it easy to identify people in the store.
Usable range - is the maximum range of the link (guarantying stable connection), whereas interference range says about the maximum distance over which the device can interfere with other devices.
If some base stations interfere with or prevent the operation of our network, we can take the following steps to reduce this phenomenon:
- change of the channel;
- change of the polarization into orthogonal one;
- change of the band (if possible);
- application of directional antennas.
The station B interferes with the stations A and C, the stations E and D interfere with each other.
The answer to the questions follows directly from regulations concerning maximum level of Effective Isotropic Radiated Power (EIRP). In many countries, without special license, the maximum EIRP = 100 mW, i.e. 20 dBm in 2.4 GHz band and 1 W (30 dBm) in 5.47 - 5.725 GHz band. The same level of EIRP may be accomplished by many means:
- EIRP[dB] = transmitter output power [dBm] - (loss of connectors [dB] + loss of cable [dB]) + ant. gain [dBi] <= 20 dBm (for 2.4 GHz)
- EIRP[dB] = transmitter output power [dBm] - (loss of connectors [dB] + loss of cable [dB]) + ant. gain [dBi] <= 30 dBm (for 5 GHz)
It's worth stressing that it is much more advantageous to use lower power transmitter and an antenna with higher gain than the other way round. Why? From the link balance we see that the desired radiated power level can be achieved in any way, however, the base station isn't only transmitter, but also receiver. Then, when it receives a signal from the client, no matter the power being transmitted in transmitter mode, the only important parameters in receiver mode are sensitivity of the receiver and gain of the antenna. So the gain of the antenna is important both during transmitting and during receiving the signals.
The gains of client stations should also be selected carefully. The client who uses a high gain antenna close to the base station, although receives strong signal, may also interfere other, even distant networks when in transmitting mode. Besides that, the receiver "sees" those networks and what it implies, they cause additional noise (the higher noise the larger number of errors and lower transmission speed), or even shares the transmission medium with them - which also effects in lower speed. On the other hand, client stations with lower, optimal for that distance gain, only see the base station and don't cause such problems.
For this purpose we recommend to use ULTIAIR 423KN N2320. It is equipped with two wireless modules that allow to create links with throughput over 40 Mb/s in each direction.
Connectors for multiswitch systems. The connectors used in multiswitch installations make up a small part of the overall costs, but are very important for signal quality, reliability of the system, and - last but not least - they condition labor consumption during the installation work...
- archive DWR of Jan. 28, 2008
Active video transmitters. Doing a CCTV installation it is often convenient to use thin cables. Sometimes there are needed long cables, over 150 meters...
- archive DWR of Jan. 21, 2008
Overexposed images from CCTV cameras. Image overexposure is a frequent problem occurring in practical implementations of CCTV systems.
Only high-quality cameras with WDR (Wide Dynamic Range) sensors are performing well in the conditions where strong light is directed straight at the camera lens. Below there is the list of cameras equipped with this kind of image sensor...
- archive DWR of May 18, 2009
Index of published issues
Anga 2009 - will the crisis stop digitalization? A measure of prosperity - hostesses at the Anga fair. Multiswitch...