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

No. 9/2014 (March 3, 2014)

Faster than LTE - the advent of pCells!

Three weeks ago, Steve Perlman, the founder of Artemis Network, introduced to the world his new technology called pCell - Personal Cell. The new approach to wireless transmission is to increase the bandwidth between mobile devices and cellular or Wi-Fi infrastructure and solve the problem of its wireless capacity. Is it 5G ? No! It's something completely different and specifying the new path of reasoning.
At present, each conventional wireless connection occupies a part of the available spectrum - to avoid interference the data rate for each user drops as more users share the same bandwidth. The transmission channel has its limitations, and thus is able to handle a limited number of simultaneous connections (Shannon’s law). The latest techniques such as MIMO (802.11n, LTE) allow for better management of the available bandwidth, but they may not be sufficient in the future. pCell is to be the solution for this very basic problem of wireless capacity, allowing multiple devices to share the same frequency band, while providing them with the full wireless connectivity capabilities.
pWave radio from Artemis
The idea of pCell is based on Distributed-Input-Distributed-Output (DIDO) concept developed already in 2009, but due to the difficulty in its implementation, so far remaining a theoretical issue considered at some universities. To put it simply, DIDO and pCell assigns each device its own zone (cell) in which it is possible to establish connections with high data rates. Physically, the pCells are created by local access points (pWave radios), and they can be as small as 1 cm. The problem of interference is solved by adequate modulation schemes used by the access points and special processing of the transmitted data with the use of complex algorithms, performed in a remote data center. Because the technology involves the mobility of devices, it is necessary to dynamically generate new, interference-free zones.
DIDO network - each user can fully utilize the full bandwidth
(source: blog.telecomfuturecentre.it)
The pCell access points, called pWaves can communicate with data centers by wired or wireless means, which facilitates their deployment and reduces network costs. Artemis is putting pWave radios on hundreds of rooftops in San Francisco and seeks for cooperation with a telecommunications company or tech giant to run commercial service in the fourth quarter of 2014.
Presentation of pCell technology.
Click on the picture to watch the video prepared by Artemis Network.

There are millions of wireless devices that do not use 100% of their capabilities due to limitations of the network to which they are connected. pCell is to be a solution to this problem. The prevalence of this technology can be very fast. It is anticipated that the expansion can take place as early as 2015. Provided, however, its standardization so that it could be of interest to device manufacturers around the world.

Breakout units for easy access cables.

Easy access cable is a solution that specifically facilitates the distribution of fibers in multistory buildings such as offices and multifamily houses. Thanks to the unique design of the cables, the individual fibers are easily accessible and can be pulled out from the breakout windows to lengths up to 30 meters. In addition to saving space in vertical cable shafts, the application of easy access cables definitely reduces installation time compared to conventional installations based on star topology where separate optical fibers go from server/technical room to users' outlets.
Breakout Unit VertiCASA VQ-BU
Distribution Box for Easy Access Cable (1:6)
VertiCasa Cable Protection Cover
Breakout Unit VertiCASA VQ-BU (1:4)
Distribution Box for Easy Access Cable (1:6)
VertiCasa Cable Protection Cover
The elements necessary for deployment of systems based on easy access cables are dedicated breakout units and distribution boxes. They provide adequate protection for the breakout windows cut in the cable tubes, shelter the pulled out fibers and keep them in proper position with permissible bending radius. Finally, they are used to attach the cables to the building structure.
The optical fibers run between the distribution points (breakout units L5351 for four fibers or distribution boxes L5352 for six fibers) and the premises of the subscribers, are to be protected by drop/distribution tube VC-TUB L7211. When a window is cut out, but currently no fiber is led out, the suitable protection for the cable is provided by VertiCasa cover L5350.

Signal-751 DVB-T modulators in a retail chain.

To distribute the preferred content from a multimedia or Blu-ray player, PC, DVR or STB to multiple televisions connected to an antenna system it is necessary to use an RF modulator. There are several kinds of the devices, but the two main groups are analog and digital (DVB-T) modulators. Each kind can be characterized by a number of parameters, such as number of inputs for the signal sources, the implemented modulation schemes, output frequency range, maximum output level etc. DVB-T modulators are more expensive, but ensure digital quality throughout the whole distribution network, including HD option and effective use of the RF spectrum (several channels on one RF channel).
HDMI-DVB-T modulators are ideal for professional applications in industrial/campus/hospital/commercial TV and CCTV systems, where the content from one or more sources is to be distributed to multiple televisions.
Signal distribution system in an electronics store. Thanks to the application of the Signal-751 R86751 DVB-T modulator, promotional HD video is easily provided to fifty or so televisions. The system has been deployed by NCK Grupa.

How to calculate the capacity of backup battery in a security system?

In accordance with EN 50131-6, alarm systems have to be powered from two independent power sources. The first is the public power network, the second is usually a rechargeable, maintenance-free battery.
Rechargeable Battery MWS 7.2-12 (12V, 7.2Ah)
Rechargeable Battery MWS 7.2-12 (12 V, 7.2 Ah)
The designer of the system specifies the required battery backup time. The time and other parameters of the system are necessary to calculate the needed battery capacity:

Q = 1.25 * ( Ia * Ta + Ib * Tb )

  • Q [Ah] - battery capacity
  • Ia [A] - total current consumed by devices in operation state
  • Ta [h] - required operation period in the emergency mode
  • Ib [A] - total current consumed by triggered alarm devices
  • Tb [h] - required alarm period

Remote playback of SD recordings from Sunell cameras.

So far, the video playback from SD card in a Sunell camera was possible only through the supplied NVMS software. To preview a selected portion of the recordings it was necessary to install the application on a PC and connect with the IP camera.
In order to facilitate the playback of the SD recordings, Sunell company prepared a new firmware allowing remote and local video preview via Internet Explorer. After entering the required time period and clicking "Search" button, the IE window displays green bar informing the user about the video coverage. Additional buttons allow to accelerate (2x, 4x, 8x) or slow down (1/16x, 1/8x, 1/4x, 1/2x) the video being played.
IE window for playback of SD recordings
The 1.8.1001.3.0.5_20140116 firmware version is available here. The software is compliant with the following 2 MP and 5 MP cameras: K1634, K1680, K1681, K1685, K1691, K1695.

Elegant and functional RACK cabinets.

19" RACK cabinets, previously used mainly by telecoms and developers of server systems, are now often utilized for installing telecommunication and antenna equipment in buildings.
The elegant and functional RACK cabinets are designed for mounting devices having housings compatible with 19" rack standard (482.6 mm). The height of the devices and auxiliary equipment is standardized as the multiplies of one rack unit ("U" = 1.75" = 44.45 mm).
RACK cabinets are ideal for installing headends, switches, computers, optical devices. They can also house devices that are not in standard 19" rack housings, for example multiswitches, RF amplifiers, modulators, DVRs, servers. For this purpose, the user should buy one of the offered shelves.
A typical section of 19" RACK rail
(Source: Wikipedia)
The best choice for small systems is one of the hanging RACK cabinets.

New products offered by DIPOL

HDMI to Micro HDMI Cable (2m)
HDMI to Micro HDMI Cable (2m) H2033 is designed to connect digital cameras, camcorders, smartphones and other devices with micro HDMI output to TVs or monitors with HDMI input. The cable transmits both video and audio.
Vandal Proof Camera: v-cam 530 (day/night, D-WDR, 630TVL, ICR, 0.01 lx, 2.8-12mm, AI, OSD, IR up to 30m)
Vandal Proof Camera v-cam 530 M10773 is a vandal proof day/night camera intended for professional video surveillance systems. Thanks to modern DSP and latest image processing algorithms the camera provides high resolution video (630 TVL in color mode). The enhanced resolution ensures high quality, detailed images.
TV Optical Transmitter: TERRA mo418 4D31 (1x6dBm, 1310nm)
TV Optical Transmitter: TERRA mo418 4D31 R82522 is used for transmission of television signals via optical medium. It converts input electrical signals within 47-2400 MHz range, fed with coaxial cable, into optical signal. The power of the optical signal is 6 dBm (4 mW), which is sufficient for feeding several to ten or so nodes (depending on the sensitivity of the receivers).

The latest

February 26, 2014 - SatNet 3.0 gained recognition from the Polish Ministry of Economy. SatNet 3.0 software application for designing multiswitch systems won the Award of the Ministry of Economy for the most innovative product or technology presented on the Elektrotechnika 2014 fair taking place in the Exhibition Center EXPO XXI in Warsaw. Members of the Competition Commission highly praised the innovation and usability level of the SatNet 3.0 application. It was noted that the designing process based on this program significantly increases the technical performance and repeatability of the systems. More information on the fair will shortly be available in the News section.
February 21, 2014 - spring trainings in DIPOL. So far, there were four courses, in Sandomierz, Warsaw, Czestochowa, and Krakow. The courses were attended by more than 110 installers. We are very pleased with so large attendance. We take it as a confirmation of the proper scope and a high level of the trainings. There will be next seven courses in seven Polish cities.

Worth reading

How to transmit HDMI signals over long distances? The Signal-HD H3608 HDMI to fiber optic converter allows for long-range (up to 20 km) transmission of HDMI signal (also in HD quality) via a single-mode fiber. Simultaneously, it ensures remote control of the HDMI source device by converting and transmitting commands from its IR remote control... more
Transmission of HDMI signal using Signal-HD H3608 converter and optical link
Patch Cord (made to order)