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DIPOL Weekly Review - TV and SAT TV, CCTV, WLAN
No. 15/2016 (April 11, 2016)
Will Microsoft set a new standard of communication? Microsoft has unveiled a system for displaying a moving, three-dimensional image representing a person. The hologram is displayed in real time and is a faithful representation of the person who is in a completely different place. The displayed person can interact with surrounding objects. These objects are also visible for the recipient of the transmission. In addition, the system allows for two-way communication and recording the material. The recordings can be displayed three-dimensionally from any perspective and in different size. The communication method developed by Microsoft has been called "holoportation".
On the left - a conversation with hologram, on the right - "communication room" with set of cameras
(source: microsoft.com)
The digitization of the image is possible thanks to special 3D cameras. A computer is processing the digital information, separates the image of the interlocutor from the background, keeps track of their movements, compresses and transmits the image to the Hololenses of the user. The digitized model of a person is merged with the image seen through the glasses. The user has the impression that the interlocutor is in the same room.
A holoportation
(source: youtube.com)
Engineers from Microsoft Research estimate that holoportation will be present in homes in ten years. There are working prototypes, development kits will be on sale soon. It seems that this technology can shape the future development of communication systems.
Analog video surveillance terms. Basic components of analog monitoring systems have recently undergone substantial modernization. It involves a significant increase in resolution and change in recording systems. To avoid confusion between the older and newer terms, we list the most important ones:
  • CVBS (Composite Video Baseband Signal) - video signal standard used in old analog TV and CCTV systems, carrying standard definition video typically at 480i or 576i resolution.
  • WD1 - non-standardized video format, backward compatible with CVBS, used in CCTV systems with monitors with 16:9 aspect ratio.
  • HD-TVI, AHD, HD-CVI - currently popularly used non-standardized analog HD video formats, not compatible with CVBS.
  • PAL and NTSC - color coding systems, not directly bound to image resolution, employed both in analog CVBS and HD video formats.
Architecture of IP CCTV systems based on Hikvision solutions. Hikvision company, the leader in video surveillance solutions, offers its customers devices with different degrees of sophistication. Both of the cameras and NVRs are offered in economical lines, available for most potential users and satisfying typical needs, and in professional lines, dedicated for special or very demanding applications. Among the latter equipment there are cameras dedicated for identification car license plates, highly sensitive cameras capable of night operation in color mode in low-light environments, cameras with hardware WDR (wide dynamic range) with dynamic range up to 140 dB designed for applications in areas with large differences in lighting. An example of selecting Hikvision devices for a professional IP CCTV system is presented in the video below.
An example IP CCTV architecture based on Hikvision solutions
(source: youtube.com)
Distribution of digital terrestrial television in an apartment building. To receive and distribute DVB-T broadcasts, the apartment building with four staircases has been equipped with a set of TERRA channel amplifiers that filters and amplifiers signals received by DIPOL 44/21-69 Tri Digit A2670 antenna. The set consists of two twin channel amplifiers at420 R82510 and broadband amplifier ma400 R82520. The modules are placed on R82538 rail and powered from DR-60-12 R82532 power supply unit. The set, capable of amplifying four DVB-T multiplexes, provides at its output stable (AGC) high level signals. Additionally, the residents have access to FM radio broadcasts received by Dipol 1RUZ PM B A0221 antenna and injected into the RF distribution system via the ma400 R82520 amplifier.

4-way TV / FM Splitter - Signal R-44-way Tap: Signal O-4 (5-1000 MHz)Subscriber Terminal Outlet: Alcad BM-100 (FM&DAB/TV, flush)FM Antenna: Dipol 1RUZ PM B (omnidirectional H+V)Multiband Amplifier Terra ma400 (FM/VHF/UHF)Twin Channel Amplifier: Terra at420 (UHF, analog TV & DVB-T, AGC) UHF TV Antenna: DIPOL 44/21-60 Tri Digit
Diagram of the DVB-T distribution system in the building with 4 staicases and 64 apartments.
Click on to see it in PDF format.
The signal to each outlet is provided via passive distribution network which begins with 4-way TV/FM splitter Signal R-4 R60104, with one output for each staircase. The next distribution points are also based on the Signal R-4 R60104 splitters that feed the signal to individual floors. The last stages of the distribution network are 4-way taps R6024 with graded loss of the tap outputs connected to the terminal outlets. The pass-through outputs of the taps are terminated with R66200 resistors. The cabling uses DIPOLNET Tri-Shield RG-6 Cu E1220_500 (A class) coax.
What RACK cabinet for an SME company? Due to the large amount of IT equipment (switches, routers, cable organizers, patch panels, telephone switches, UPSes, NAS servers) used in companies, there is a need for large rack cabinets with a depth of up to 1 meter (due to the size of servers). Devices installed in these cabinets should be provided with adequate cooling.
SIGNAL server RACK cabinets have perforated front and rear doors to cool the devices mounted inside from external air conditioning units. The distances between pairs of rails located on both sides of the cabinet can be adjusted in increments of 1 cm, which simplifies installation of servers and similar devices. The models of cabinets listed below have four lockable side walls.
CodeHeightWidthDepth
R912016124U600 mm800 mm
R912016542U1000 mm
R9120166800 mm
Components of a server RACK cabinet
Advantages of optical fibers in SMATV systems. The use of fiber optic solutions in SMATV systems can have both technical and economical advantages, and becomes more and more popular. Here are the main advantages of optical fibers in SMATV systems:
  • Possibility of transmitting TV signals over long distances without regeneration (it may depend on the network topology and devices used). The signals can be transmitted over distances of hundreds of meters or even tens of kilometers. A large size of a building or a housing development is not a problem for easy implementation of the system, in contrast with traditional RF technology. SMATV systems based on copper cables can be difficult for implementation when the distances between active devices exceed 100 meters. The application of additional RF amplifiers means additional costs, both at the implementation and operation stage.
  • Complete immunity to ground loops, surges and spikes – this often overlooked fact may be in many situations the most important one. SMATV systems, due to antennas located on roofs of buildings are particularly vulnerable to surges resulting from lightning. Despite proper grounding of all system components, some of the equipment of traditional SMATV systems can be irreversibly damaged. Notably, overvoltages can destroy not only the SMATV equipment, but in extreme cases also some consumer devices, such as satellite receivers or televisions. In contrast, fiber optic cable is a perfect insulator. This means that all the surges induced in antennas installed on a roof will not cross the optical transmitter - all other components of the system as well as subscribers' devices are fully protected.
  • Complete immunity to electromagnetic interference – fiber-optic cables can be without any risk of interference installed together with copper cabling, including AC power lines.
  • Space-saving in installation shafts – one fiber-optic cable with diameter 2–3 mm transmits the same signals as a typical 9-cable multiswitch bus consisting of coaxial cables with 7 mm diameter.
  • Lower cost of cabling – the cost of installing fiber-optic cable instead of a bus composed of 9 coaxial cables can be several or even ten times lower. It is both the result of a competitive price of the optical cable compared with a good quality coaxial cable and the reduction of the number of the cables to the single one.
One fiber-optic cable transmits the same signals as 9 coaxial cables.
This is particularly important in the case of lack of space in cable ducts.
New products offered by DIPOL
HD-TVI TURBO HD Camera Hikvision DS-2CE16C0T-IRP (compact, 720p, 2.8mm, 0.1 lx, IR up 20m)
HD-TVI TURBO HD Camera Hikvision DS-2CE16C0T-IRP M7552 has been designed for use in CCTV systems based on HD-TVI DVRs. The camera provides 720p video. With sensitivity of 0.1 lx and built-in IR illuminator with range up to 20 m, the camera provides high quality images in low light or even no-light conditions (with IR).
Pole/Post Clamp OR-150/T (Ø max 280mm)
Pole/Post Clamp OR-150/T (Ø max 280mm) M5181 powder-painted steel clamp allows for mounting a camera on a pole/post with a diameter from 70 to 280 mm. The clamp is fixed to the pole with steel strips (1 meter long) and is suitable for cameras with four mounting holes (large adjustment range).
Overlay Character Generator FG-50HD (for POS video monitoring systems, AHD, HD-CVI, HD-TVI, CVBS/PAL)
Overlay Character Generator FG-50HD (for POS video monitoring systems, AHD, HD-CVI, HD-TVI, CVBS/PAL) M1725 links point of sale terminals (POS) with CCTV cameras to produce a continuous overlay of transactions superimposed on the video output. The FG-50HD character generator acts as a looping device, with CCTV video signal input and output. The Cash Register/POS data is overlaid on the video image provided by the video output.
Worth reading
Small IP CCTV system based on Hikvision NVR with built-in PoE switch. The diagram below shows an example of IP CCTV system for a single-family home, based on Hikvision devices. The system consists of 4-channel NVR K22042 with built-in PoE switch and four K1772 cameras with varifocal lenses allowing for the adjustment of viewing angles within 91°- 28° range... >>>more
IP video monitoring system for a small house.
The cameras are powered directly from the PoE switch built into the K22042 NVR.
Intelligent building - the whole home at your fingertips
 
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