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DIPOL Weekly Review - TV and SAT TV, CCTV, WLAN
No. 18/2012 (April 30, 2012)
HUD solutions for U.S. troops. U.S. Department of Defense (DARPA agency) has signed a contract with Innovega company developing ultra-small-form-factor head-up display (HUD).

HUDs use technologies that present data by displaying information on transparent screens. This way, the operator e.g. pilot, is able to access information with the head positioned "up" and looking forward, instead of tilted down looking at lower instruments.
HUD system in Lockheed Martin C-130J Super Hercules
First implementations of HUD idea were achieved before World War II. The applications started in combat aircraft. Since 1970, they have been applied in civil aviation. Today, most aircraft have such systems. In 1988, they were used for the first time in cars (Oldsmobile).

As the screen, modern HUD systems commonly use the aircraft cockpit windows (or windshields in vehicles), or the screen is integrated with a special helmet. The newly developed ultra-small HUDs are based on special contact lenses and light glasses. This will allow the system to be used by ground troops.
The contact lenses that allow the integration of real and virtual world
The new display system is based on the idea of iOptic contact lenses that allow the user to focus on two things at the same time - both the information projected onto the glasses' lenses by an electronic device and the more distant view that can be seen through them.
The principle of operation of iOptic lens
A characteristic feature of this solution is the use of two filters and two sub-lenses, separate for the two distances. The central mini lens ("lenslet") is equipped with a filter which transmits information about the image displayed on the glasses, and not letting in the light from the main scene. The outer filter does the opposite. The sub-lenses are chosen so that both images are in focus and simultaneously registered by the retina. According to Innovega, the lenses may be released to the public in 2014.

Augmented reality according to Google
HUD is a part of concept called Augmented Reality which combines the view of real world with additional, computer-generated information. Augmented Reality enters the mass market mainly through smartphones. This idea has great potential, well presented by the Google's vision. However, experts say that such systems are still not ready for a commercial launch.
50-meter long USB connection. The maximum length of USB cable is 3 or 5 meters, depending on the version. For some applications, the distances may be too short. The USB RJ45 extension adapter M1680 allows for distances up to 50 m. The estimated data transfer rate over the maximum distance is 1 MB/s (8 Mbps).
USB RJ45 Extension AdapterUSB RJ45 Extension Adapter
The USB extension adapter is ideal for installations that require long, wired connections with webcams,
printers, pads, mouses, keyboards, USB flash drives etc. The device is compatible with USB 2.0.
The USB extension adapter is used to connect peripheral devices to a computer or other host device with Universal Serial Bus interface with the help of a Cat5/Cat5E/Cat6 patch cable (not included, e.g. one of UTP patch cords). The kit consists of two units, one with USB plug type A male, the second with USB plug type A female. Each of them has RJ45 socket for connecting one end of a UTP patch cable.
The USB extension enables the operator to operate equipment located at a considerable distance from the control room. The extension in conjunction with VGA transmitter M1679 enables the operator to fully control a computer, digital video recorder etc. closed in a safe place, with the use of a mouse and monitor.
"Engagingly about Antennas" - 11th DIPOL's photo contest. The entries to this year's competition can be submitted from June 1, but it is worth to look for interesting themes all year round...

Rules of participation and the pictures submitted to the previous editions
Engagingly about Antennas - 10th DIPOL's Summer Holiday Contest 2011
Engagingly about Antennas - 10th DIPOL's Summer Holiday Contest 2011
Engagingly about Antennas - 10th DIPOL's Summer Holiday Contest 2011
Good evening 2
Barbara Gradkowska
Looking up
Grzegorz Dabek
In a guerrilla village
Tomasz Grzyb
Engagingly about Antennas - 10th DIPOL's Summer Holiday Contest 2011
Engagingly about Antennas - 10th DIPOL's Summer Holiday Contest 2011
Engagingly about Antennas - 10th DIPOL's Summer Holiday Contest 2011
Discreetly
Piotr Bułanow
A mark of modernity
Marta Juraniec
Trunk
Arkadiusz Broniecki
Modernization of shared antenna system with 110 outlets. The investor has undertaken modernization of MATV systems in a number of old buildings. The scope of work included removal of old equipment and installation of modern devices for DVB-T. In the first stage the systems have been modernized in high, 11-story buildings with two staicases and the total number of outlets of 110.
The first problem faced by the contractor was the selection of suitable active devices at the input of the system, to amplify three DVB-T multiplexes.
The installer has chosen solution with two twin-channel amplifiers Terra at420 R82510 and multiband amplifier ma400 R82520, powered from DIN-rail power supply DR-60-12 R82532, placed on DIN-rail bracket R82538. This set of equipment can amplify even four DVB-T multiplexes and thanks to AGC provides high and stable output signals.
The project of the modernized MATV system in a 11-story building with 110 outlets (click on to enlarge)
Because of two staircases, the signals are divided by the R60102 splitter into two subnetworks. Additionally, each of the subnetworks is further split into four smaller segments to improve separation between outlets and conditions for future maintenance. Then, the signals are split by R6024 taps with graded tap outputs, designed to suit different lengths of cable lines, and connected to the outlets.
The unused outputs of all passive components are equipped with terminating resistors R66200. The entire distribution system is based on TRISET-113 E1015 cable.
The total attenuation of passive elements to the nearest and farthest outlets e.g. in the left branch of the network is respectively 46 dB and 48.5 dB at 862 MHz and approximately 5 dB less at 470 MHz. Assuming that the MA400 amplifier feeds signals at the level of 105-110 dBuV, it means that there is no need for additional amplifiers in the distribution network.
Arranging optical fibers in RACK panels. Optical enclosures are used in FTTX networks as distribution panels and frames. An important feature that should be addressed when selecting fiber optic boxes/panels is the possibility of convenient arrangement of fiber in splice trays and easy access to all components for maintenance purposes.
Splice trays should fully protect splices and guarantee at least the minimum bending radius for the fiber used. A good choice is the ULTIMODE MT series with telescopic guides which allow the installer to pull out shelves completely for convenient installation of the cabling and easy access for maintenance.

The installation steps:
  • insert the fiber optic cable into the tray, secure it and lock;
  • place suitable adapters and connect pigtails;
  • splice the fibers using appropriate means, the splices should be fitted into matching slots;
  • mount the tray in 19'' panel;
  • connect patch cords to the optical connectors.
19-inch ULTIMODE MT-548 L5148 box with ULTIMODE P-48SC L5542 front panel, with L4213 adapters.
The tray carries ULTIMODE L5550 mechanical splices connecting L3551 single-mode pigtails.
Security camera even for sub-arctic areas. Sunell SN-IRC5830L M11260 camera captures high resolution video (540 TVL) by using high-tech imaging technology and special processing algorithms. The built-in varifocal lens (2.8-10 mm) allows for quick adjustment of viewing angle. The on-board IR LED illuminator with a maximum range of 30 m enables low/no-light operation. The camera is usually used for video monitoring of buildings, parking lots, gateways etc.
The camera has been specially designed for operation in a wide temperature range (-45...+45 oC) and in environments with high humidity (IP67). The possible very low operating temperature is the result of a special design of the electronic circuitry and housing. This parameter has been confirmed by the results of laboratory tests.
View of a climatic chamber used by Sunell company for testing products in extreme conditions
How to set a foreign object detection in NUUO software? Foreign Object function can warn about new objects that appear in area monitored by a camera. It requires to define the detection zone, or select the entire scene. The detection zone is selected with the mouse and marked with a red tint.
Defining detection zone
Defining object size
The next step is to define the size of objects that are to be taken into account, in order to avoid false alarms triggered by much smaller or bigger ones.

Detection of a foreign object can start the following actions:
  • sending email to a predefined address,
  • phoning a specific number,
  • triggering sound alarm,
  • activating alarm outputs,
  • displaying warning message on computer's screen.
WLAN in a single-family home. The user who has Internet connection in their single-family house usually would like to have possibility of using the Internet in various parts of the home and in the immediate vicinity, e.g. in the garage and garden. To reach that goal, the perfect solution is the use of a wireless network (WLAN) operating in 802.11n standard.
In the case when the Internet is provided by a cable television operator via cable modem with Ethernet output, or by a local ISP using Ethernet cable, we recommend to use the following devices:
  • Router with wireless access point: TP-LINK TL-WR740N N3252,
  • Wireless USB adapter: TP-LINK USB TL-WN722N N2922,
  • PCI NIC: TP-LINK TF-3239DL 10/100 Mbps N2999.
Wireless USB Adapter: TP-Link TL-WN722N (802.11n, 150Mb/s)PCI Network Interface Card: TP-Link TF-3239DL 10/100MbpsAccess Point: TP-Link TL-WR740N (w. router, 4p-switch, 150Mb/s 802.11n) Wireless USB Adapter: TP-Link TL-WN722N (802.11n, 150Mb/s)Wireless USB Adapter: TP-Link TL-WN722N (802.11n, 150Mb/s)
Wireless/wired LAN based on TP-LINK devices (DOM: House, OGROD: Garden)
The cable from the ISP is connected to the WAN port of the wireless N router; desktop computers can be connected to the ports of the switch with patch cables, or wirelessly - to the built-in access point (with the use of wireless adapters), similarly to mobile computers equipped with wireless cards.




New products offered by DIPOL
DVB-S/S2 Receiver (CI, MPEG2 TS output): Terra RDC-311 (for MMH-3000 headend)
IR Remote Control Bender: Signal IRB-600U (3-way)
Universal Mechanical Splice: KeyQuick10 SC/UPC SM
DVB-S/S2 Receiver,
CI, MPEG2 TS output
TERRA RDC-311
R817102
IR Remote Control Bender
Signal IRB-600U (3-way)
R94130
Universal Mechanical Splice
KeyQuick10 SC/UPC SM
L5753
Worth reading:
Fiber optic television in a big hotel complex. The choice of the optical transmitter. Owner of one of the hotels in West Pomerania, Poland, had the TV distribution system renewed. The installation company was asked to upgrade the system so that the analog televisions could receive DVB-T channels. Since the entire hotel complex consists of five large buildings, the best choice was application of optical cables that had been installed in the construction stage of this facility.
The layout of the hotel complex and fiber optic links
Appearances can be deceptive. CCTV transformers (baluns) match the impedance of coaxial video outputs (unbalanced, 75 ohm) to the impedance of the balanced lines (100 ohm, usually pairs of UTP cable), and vice versa, the impedance of the balanced lines to the impedance of coaxial inputs of the signal receivers (DVRs etc). The cheap items of that kind may look similar to professional, more expensive devices, but they are usually made in the simplest way and have low parameters that deteriorate image quality (noise, stripes, running lines, skew)...

Passive video baluns of Etrix series have been designed to meet the highest standards - they do not cause distortions and are resistant to environmental conditions...
Items that seem to be identical have a completely different structure
Not enough HDMI inputs on your TV? The solution is an HDMI switcher that allows the user to connect multiple high-definition devices to a TV equipped with insufficient number of HDMI inputs. There are no problems with simultaneous connection of a satellite receiver, DVD player, PC or a game console. Even when the TV has sufficient number of HDMI inputs, it may be more elegant to connect only one HDMI cable for easy installation on a wall with the use of LCD/plasma mount. It really improves the appearance of the TV suspended on the wall. There are two high-quality HDMI switchers, H3121 with two inputs, and H3131 with three inputs. The choice of the source is made with the use of the included remote control or manually.
Application diagram
DVB-T Receiver Signal HD-527 (MPEG-2/4, PVR Ready)
 
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