DIPOL Weekly Review - TV and SAT TV, CCTV, WLAN

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Google - a global Internet provider?

In early June, the American press released information about Google's plans to spend in the near future even $ 3 billion to launch a fleet of 180 satellites. The main task of the satellites would be to provide access to the Internet around the world - in particular, in places where so far it was difficult or impossible. The project is fully correlated with the previous actions of the American giant during the last few months - the acquisition of Titan Aerospace producing solar-powered drones and the purchase of Sky Box Imaging company (for about $ 0.5 billion) focused on transmission of high quality images from small satellites orbiting the Earth. Although Google does not say that exactly, it seems that all of these actions complement the Loon project that began nearly a year ago and whose purpose is to provide the Internet to all the inhabitants of the Earth with the use of stratospheric balloons.

Google's Project Loon, from which the company began implementation of the plan to conquer the sky, is to place at an altitude of about 20 km special balloons powered with solar panels, capable of two-way data transmission. According to the assumptions, the balloons should move in predictable manner by using the winds blowing in the various layers of the stratosphere. They will exchange data with ground stations of the users, equipped with dedicated antennas. Currently, the tests are carried out in the unlicensed 2.4/5 GHz bands. So far, the maximum achieved throughput is 22 Mbps.

Google's balloon in the Campo Maior area in Brazil.

With the implementation illustrated above, a school in the town without Internet access can enjoy the benefits of the global network. What's more - it is a high-speed Internet connection, because for the first time the project has adopted LTE technology.

A drone with a wingspan of 50 meters, weight of 32 kg that reaches a speed of 104 km/h.
Using solar energy, it can stay in the air even 3 years.

The price paid by Google for Aerospace Titan has not been publicly disclosed. The drone shown in the photo can reach the ceiling of 20 km and remain in the air for up to three years. Its wingspan is 50 meters and the maximum speed exceeds 100 km per hour. As yet, the tasks of the drones that to be placed over our heads are not exactly specified. It is said that they may support the Project Loon, as well as Google Maps and Google Earth. Another field can be the research for the possibility of using winds blowing 500 m above the Earth for production of electrical energy.

What are the long-range plans of Google and what exactly the company wants to achieve in the next few years spending so huge sums of money and unequivocally declaring that is interested in some kind of conquering the sky? Undoubtedly not without significance is the fact that nearly 2/3 of the world's population do not have access to the Internet. This number of over 4 billion (!) people has a great potential that is seen by Google - they may be the future users of its search engine, gmail and Youtube. In a broader perspective, this is a big chance for Google to become the world's largest Internet provider, which will help in the further development of its core advertising business in all continents. Thus, although the goal to provide Internet access to every corner of the globe is laudable, the results can be really profitable. So, we may hope that another translation of the name of the balloon project ("loon" can mean "fool") will not prove to be prophetic ...

Gigabit fiber-optic network.

The management of a large manufacturing plant decided to increase the throughput of the network infrastructure and to optimally allocate the network resources for different purposes. The only solution guarantying the required parameters was fiber optic network that had to be built from scratch. At the level of network switches, the whole system has been logically divided into three segments - control of production lines, office network, video surveillance system.

The main components of the fiber optic system in the manufacturing plant

The server room has been equipped with SIGNAL 19" RACK cabinet R912015 (42U 800x800mm, standing) containing managed switch TP-LINK TL-SG5412F N29963, UPS CyberPower PR1500 N9714, AC power strip R9120234. In the switch there have been installed SFP transceivers ULTIMODE L1416, each allowing for bidirectional communication via one single-mode fiber. The TL-SG5412F switch has 12 SFP slots that equipped with suitable SFP modules are used for fiber connections with other servers and locations.

Other buildings have been equipped with smaller RACK cabinets that contain, among other devices, managed switches TP-LINK TL-SG3216 N29958. The switch has 16 Ethernet 10/100/1000 Mbps ports and two 100/1000 Mbps SFP slots that, equipped with appropriate modules, connect the device with the central node of the network (the server room). The suitable modules are SFP transceivers ULTIMODE L1417, complementary to the L1416 ones used in the server room. The reliability of the network segments is guaranteed by the CyberPower OR1000 N9705 UPSes .

The application of managed TP-LINK switches allows for creating virtual local networks (VLANs) that have mutually isolated domains (IP CCTV system, office network, servers for production processes). The devices can be mounted in RACK cabinets, which facilitates the installation process and maintenance procedures, as well as ensures the best protection and professional appearance.

The network based on optical fibers is very efficient. It has also eliminated periodical problems with surges generated on transmission lines (the fibers are insulators). This, in connection with the use of UPSes and VLANs, makes the high-speed network very secure and reliable.

Satellite and terrestrial antenna system integrated with CCTV in a single family home.

Modern home TV system should provide access to DVB-T and satellite channels. Increasingly, the owners of homes also require the integration of TV installation with home video monitoring system. The residents should be able to monitor the images from security cameras and the archives from the home DVR on their televisions.

First of all, the home CCTV system should monitor the entrance/s and the driveway. A good supplement is a pair of cameras watching the area around the house and the premises (garage, shed etc.). Generally, the four cameras can provide satisfactory results.

A home CCTV system integrated with antenna installation

The diagram above shows the components and the architecture of the integrated system. The satellite DVB-S/S2 broadcasts, DVB-T and FM channels, are distributed by the R6944508 multiswitch, together with additional "private" DVB-T channel carrying images from the 4 analog CCTV cameras. The images are also recorded by the M72404 DVR.

The signals from the DVB-T A2670 and FM A0221 antennas are fed to the C0340 triplexer. The third input of the triplexer (VHF) can be used in the future for connecting a VHF antenna for DAB services. The combined signals from the output of the triplexer are provided to the RF input (loopthrough) of the Signal-350 R86350 DVB-T modulator. The modulator injects another signal - the DVB-T mux carrying information from the M72404 DVR. The complex RF signal is then distributed by the R6944508 multiswitch. The application of the DVB-T modulator is dictated by the fact that the users want to monitor the CCTV images just by selecting the respective digital channel on their TVs, without switching them to analog mode.

The user of any television connected to the antenna system can watch any DVBS/S2 or DVB-T channel, or the images from the security cameras (live or played back from the DVR).

IP video surveillance of building material warehouses.

A megapixel video monitoring system composed of 48 IP cameras has been installed in the newly opened storehouse of "Grupa PSB SA" in Tarnobrzeg, Poland. The group has been operating in the market for 14 years and is one of the largest and fastest growing sales networks in Poland. Currently, the group consists of more than 300 small and medium-sized family businesses from across Poland, running over 420 building material yards, 127 storehouses, and 16 PSB-Profi supply centers. All the businesses employ over 10 thousand people.

The IP CCTV system in "MROWKA" in Tarnobrzeg
consists of 12 compact IP cameras Signal HD-200 K1810
and 36 IP dome cameras Sunell SN-IPV54/14ZDR K1698

To improve the safety of the staff and customers, the owner decided to install IP CCTV system. The task was commissioned to Dipol Sandomierz. There have been installed 12 compact IP cameras Signal HD-200 K1810 and 36 IP dome cameras Sunell SN-IPV54/14ZDR K1698. All the cameras provide video streams with Full HD (2 MP) resolution and have built-in IR illuminators allowing for operation in low-light /no-light conditions

Megapixel resolution helps to identify people, license plate numbers and other details.

The server room is also used for the surveillance of the warehouse. The cables from the cameras are connected to TP-LINK TL-SG3424P N29961 and ULTIPOWER N29986 switches. The both switches with PoE function also provide power to the cameras. The switches and Hikvision IP NVRs have been installed in Signal RACK cabinet.

View of the IP NVRs and switches placed in Signal 19" RACK cabinet

Wall mount RACK enclosure cabinet with rear access.

Double-section hanging RACK cabinets have special feature - mounted on a wall provide access to the devices placed inside both from the front and the rear. Both the first and second section can be opened to the left or right side. The devices mounted inside can be cooled by dedicated fans. The cabinets are suitable for mounting equipment compliant with 19" rack standard. It is ideal solution for the installation of telephone exchanges, network devices, components of CCTV and SMATV systems - where the easy access to the equipment and connectors is necessary for maintenance purposes.

Double-section cabinets offered by DIPOL:

Openable rear part of double-section cabinet and the front view

Power for IP cameras.

Power supplying for IP CCTV cameras becomes frequent task for installers of security systems. With the use of PoE technology (Power over Ethernet), the installation work can be easier. The best PoE solution seems to be the integration of switching and powering functions, i.e. the application of switches with PoE functionality.

The N29980 PoE switch can power four IP CCTV cameras. Its fifth port should be connected to an NVR.

PoE switch N29980 ensures video and power transmission over the same cables

Juni 10, 2014 - meeting with designers of electrical and telecommunication systems in Rzeszow, Poland. It was the seventh meeting in the cycle of trainings organized by engineers from DIPOL, the last in the first half of 2014. During the meetings, over 500 designers could acquaint with SignalNet concept. This modern concept for all kinds of buildings has been specially prepared to fulfill the latest technical requirements in Poland and European Union. One of the platforms that provide access to a wide range of TV programming is multiswitch technology. Even complex multiswitch systems can be designed in a simple and effective way with the use of SignalNet application prepared by Terra company.

During the meetings, designers could acquaint with the latest technical solutions

Safety of antenna systems - surge protector or galvanic isolator? Signal TV-Sat Surge Protector R48602 protects TV/SAT devices against surges caused by lightning storms. A good practice is to use this type of protectors at the inputs of the first active devices in the system (directly after the antennas). These are usually terrestrial TV amplifiers, satellite amplifiers and multiswitches... more