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

Ranking of countries with the best communication, Denmark at the leading position.

The recently published UK Internet Accessibility Index 2021 report ranks Denmark as the best-connected country in the world. Also Liechtenstein and USA are on the podium. Poland takes the 22nd place in the ranking. According to the British, the average download speed in our country is 24 Mbps and is associated with a cost of 18 USD. The winner of the ranking, Denmark, boasts a connection with an average speed of 99 Mbps at a cost of $55, and the country with the fastest Internet is Liechtenstein - 187 Mbps at a cost of $88. The ranking does not evaluate only the speed, but highlights 10 important criteria:

It is worth noting that Denmark stands out in terms of development and promotion of modern communication technologies. The country has introduced optimal legal regulations supporting network availability and coverage, as well as exemplary access to electronic government and education. Denmark has also been recognized by the World Economic Forum (WEF) – it reached the highest level of the "Networked Readiness Index" (NRI).

Western Europe dominates in terms of network speed - it takes 8 out of 10 highest places. On the opposite side, there are the African countries which use mobile data due to poor infrastructure, and China with an average speed of only 0.17 Mbps. Countries with fast fiber networks can provide the most competitive prices. Here the best performer is Romania, which has developed very strongly in recent years. Poland is also highly ranked here (9th place), it also stands out in terms of the cost of 1 GB of mobile data (8th place, the cheapest is India).

Strong infrastructure and reliable and affordable access to the Internet are the key factors shaping modern, competitive digital economies. The coronavirus pandemic only accelerates this trend. To avoid being left behind, it is important to build and take actions to promote access to high-speed networks.

Control of PTZ cameras with an USB control unit.

For PTZ cameras, it is possible to remotely control the position of the camera and its optical zooming in. This means that the operator can aim the camera at any point and zoom it in. The control is possible directly from the DVR or remotely via a browser or client applications, both for a PC and phone. If the operator needs to move the camera frequently, the most convenient way is to control it using a control panel.

The simplest control unit, the DS-1005KI M77921, connects with the DVR via USB interface. The first step in the configuration is switching on USB manipulator mode on the panel (two LEDs are on). After connecting to the DVR, it is possible to control the cameras. Just select the number of the camera you want to control on the numeric keypad and press the left button of the joystick – this activates the PTZ control. The camera can be controlled by moving the joystick in the same direction and turning the knob to zoom in or out.
The panel can also be connected to a computer where the control of the cameras is performed by client software. In that case, activate the operator keyboard mode – one control LED will lit.

Cabling of multi-family buildings – security is also important.

Most of the materials used for cable sheath are combustible polymers (flammable or flame retardant). Polyvinyl chloride is the most popular electrical insulating material. Without special additives, it is flammable and causes flame propagation. In case of fire, thermal degradation processes occur, which may be accompanied by flame spread and emission of decomposition products, including smoke.

Comparison of the emission of dense smoke in cables with LSZH (LS0H) and PVC sheaths. The graph shows the light transmission (%) in time (min) of dense smoke emission.

Cables as well as other products used in construction industry are subject to evaluation in terms of their reaction to fire. It is estimated that from 60% to 80% of all fire deaths are caused by poisoning, suffocation or inability to quickly evacuate the place of danger. It is required that materials used in equipping a building, including electrical and telecommunication wiring, do not emit opaque, corrosive or toxic smoke under fire conditions.

The requirements for using cables with a specific reaction to fire class in a given type of building should be based on a risk analysis made by the installation designer or other national formal and legal documents. The suitable coaxial cable for antenna systems in public buildings is TRISET PLUS E1016_500. It has halogen-free LSZH (LS0H) sheath and CPR class Dca-s2, d1, a1. The reaction to fire class of cables and other conductors installed within evacuation routes should not be less than B2ca-s1b, d1, a1. TRISET B2CA E1020_500 cable should be used for this purpose.

TRSISET PLUS E1016_500 cable with the LSZH sheath (LS0H) – halogen-free insulation – an ideal solution for multi-family buildings

Configuration of Hikvision IP video intercom system in the Doorphone mode.

You can add an additional, local user door station to the video-intercom monitor in the Doorphone mode. For example, if a door station is installed at the entrance to a housing estate, it can be used to call any premises that are connected to it and any user can view the image from it. If you want to have an additional door station at your property, you can add it to the monitor in the Doorphone mode. From this station you can call only the monitor to which it was added and only this user can view the image from it. The door station should be added to the monitor as shown below:

Adding the door station in the Doorphone mode to the DS-KH6320-WTE1/EU monitor with firmware version 2.1.10 build 201207 (protocol 2.0)

Example installation diagram in the Doorphone mode. A given user can see the master
and the slave door station assigned to his premises.

HD-TVI/AHD signal via optical fiber.

Modern CCTV standards allow for signal transmission from analog 1080p cameras at a distance of up to 300 m using quality coaxial cable. For longer distances between the camera and a DVR, e.g. when monitoring large-area halls, factories, office buildings, etc., this distance may not be sufficient.

The best solution is to use fiber-optic video converters and and fiber-optic cables. In this way, the maximum transmission distance can be easily increased up to even 20 kilometers. Moreover, fiber-optic technology will ensure the ideal electrical isolation between cameras and the DVR and it will reduce the sensitivity to interference from power lines, RF systems, and other devices.

The figure below shows a connection diagram of the Ultimode HDTVI-202 L2030 dual-channel video converter. Ultimode video converters are versatile devices, i.e. they enable the transmission of all popular and currently used video standards: TVI, AHD, CVI and CVBS/PAL.