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DIPOL Weekly Review - TV and SAT TV, CCTV, WLAN
No. 8/2010 (Feb. 22, 2010)
Vancouver has the Olympics and security. The Olympic Games are a very important event for the whole world. The organizers should create great atmosphere and provide a wonderful spectacle.
A very important element is the safety of both the athletes and spectators. The cost of securing this year's Olympics amounts to over 850 million USD. The main components of the security system are 900 CCTV cameras deployed in the Olympic village and the city. Most of the equipment has been supplied by Panasonic. There have been applied many vandal proof network fixed dome cameras WV
Usually sports events of this rank as the Olympics are presented as a powerful factor in fostering the development of the region in which they take place. In the case of Vancouver, for the first time many inhabitants of such a "happy city" have not been satisfied with the organizational formula of the sporting spectacle. A large group of people think that great expenses borne by society become the source of profits for private companies, mainly TV stations and sports organizations. Many argue that the profits of local hoteliers and restaurateurs do not balance the costs of the necessary investments and the discomfort of the residents exposed to the controls relating to security. US$ 850 million spent on Olympic security is the amount sufficient to build several thousand apartments.
Vancouver has the Olympics and security, but for the first time none of them has been desired by a large group of residents.
Prípravy na Olympiádu
(Zdroj: www.cbc.ca)
Rádiové spoje na atypických držiakoch - kde sa nachádzajú? Vo všeobecnosti, antény a bezdrôtové prepojenia sú umiestňované vo výškach niekoľko desiatok metrov, tak aby rádiové vlny neboli zatienené budovami a stromami. Antény na nasledujúcich fotografiách sú umiestnené veľmi nízko, len niekoľko metrov nad zemou. Kde sa nachádzajú a prečo sú rozmiestnené takýmto spôsobom? - Odpoveď nájdete na konci tohto vydania.
Rádio spoje na atypických držiakoch - kde sa nachádzajú? -Odpoveď nájdete na konci tohto vydania.
Ako si vybrať komponenty pre koncové stanice? Koncové stanice TERRA sa používajú na redistribúciu TV programov, prijímaných zo satelitov aj pozemných vysielačov. Umožňujú tiež distribúciu audio/video signálov z CCTV kamier, počítačov, DVD prehrávačov a pod. VF modulátor v každom module dokáže pracovať na ľubovoľnom kanály z celého pásma 110-862MHz (kanály S1-69). Takto, odberatelia nepotrebujú žiadne dodatočné vybavenie - môžu prijímať signál na štandardnom TV prijímači. V prípade veľkých distribučných systémov (viac ako 100 zásuviek) ako aj v hoteloch, penziónoch a podobne, je koncová stanica uložená v 19" racku. VSB modulátory v moduloch sú schopné schopné pracovať na priľahlých kanáloch, s výstupnou úrovňou až do 102 dBuV, čo dovoľuje pripojiť približne 60 zásuviek bez potreby použiť dodatočné zosilňovače. Ak distribučná sieť bude mať viac zásuviek, je nutné použiť kanálové zosilňovače zo série Alcad: ZG (ZG-401, ZG-601, ZG-421).
Prvým krokom pri navrhovaní koncovej stanice je voľba kanálov, ktoré budú distribuované do siete. Celkový počet kanálov určuje počet potrebných Základných jednotiek UC-380. Jedna jednotka môže obsahovať až 8 modulov. Každý modul distribuuje jeden kanál.
Koncovú stanicu je možné nakonfigurovať do módu Master alebo Slave, tj. programy vysielané z jedného transpordéra je možné dekódovať v QPSK CI prijímacom moduly RDC-313 R81710, ktorý poskytuje MPEG-2 transport stream (MPEG-2 TS), pre následné spracovanie v lacnejších MPEG-2/PAL transmodulátoroch DM-313 R81712. Jedná sa o optimálne riešenie pre príjem niekoľkých programov z jedného transpordéra, čím sa ušetria QPSK prijímače. Jeden prijímač RDC-313 s modulom PowerCam Pro CA umožňuje dekódovať až 4 kanály.

Viac detailov sa môžete dozvedieť v článku Krátka príručka ku MMH-3000 TERRA design .

V horeuvedenej schéme signál z QUATRO LNB prichádza do modulu RD-313C R81710, ktorý poskytuje MPEG-2 TS do troch dekodérov DM-313 R81712.
Na pravo od zdroja sa nachádzajú štyri prijímače RD-313C R81710. Tri z nich využívajú rovnakú kombináciu pásmo/polarizácia, takže môžu byť zapojené do série (VF slučka); Posledný využíva iný signál (iné kombinácia pásmo/polarizácia).
SMATV system in a multi-family building - TERRA multiswitches. The customer requirement was to make SMATV installation capable of distributing terrestrial TV programs, FM radio stations (88-108 MHz), and satellite signals from two satellites, Hotbird and Astra.
The task was undertaken by TECH-SAT from Katowice, Poland.
The antenna array consists of UHF antenna ATX-55, VHF antenna ATZ-5, and omnidirectional FM antenna A0210. The satellite signals are received via aluminum dish Famamal A9662 equipped with two LNBs - Inverto QUATRO Red Extended A98257.
In TPR metal box inside the building there are placed two active components: Universal Multiband Amplifier Telmor WWK-861 R89860 and multiswitch TERRA MSR-908 R70808. TECH-SAT company has also protected the installation from the effects of lightning discharges through the use of TV-Sat Surge Protector Signal R48602 at the inputs of the active devices.
The active devices work properly and the signal levels in all outlets ensure quality reception of all available programs. Each outlet is connected with two outputs of the multiswitch. Use of the 9/8 Terra MSR-908 multiswitch with eight outputs allows to provide signals for up two four PVR receivers.
Pohľad na anténnu zostavu
Pohľad na multiprepínač TERRA MSR-908 R70808 a zosilňovač Telmor WWK-861 R89860 v inštalačnej TPR skrinke
Building blocks of the network - SFP transceivers. FTTH solutions should ensure flexibility for possible future changes, usually extensions of the system due to growing number of subscribers. In such situations the best hardware solutions are provided by media converters with SFP slots allowing to use a variety of SFP modules/transceivers.
An example is the media converter ULTIMODE M-100G/SFP L1301 with SFP slot for optical modules compliant with IEEE 802.3z 1000Base-FX standard. In the case of expansion of the network - including topology change and even involving different power budget of the optical interconnection system - it is enough to replace the SFP module only, and not the entire device.
SFP (Small Form-Factor Pluggable) are transceiver modules used in telecommunications for data conversion and transmission. They are widely used in switches, routers, media converters. SFP modules (also known as Mini-GBIC) are designed for SONET, ATM, GigabitEthernet, optical networks. SFP interface has been standardized by the manufacturers under the Multi-Source Agreement (MSA). The interface is the the successor of GBIC, allowing greater port density.
Ethernet Media Converter: ULTIMODE M-100G/SFPSFP Transceiver: ULTIMODE SFP-203G (two single-mode fibers up to 20 km)SFP Transceiver: ULTIMODE SFP-203G (two single-mode fibers up to 20 km)Ethernet Media Converter: ULTIMODE M-100G/SFP
Média konvertor s SFP šachtou + SFP prijímač
M-100G/SFP L1301 média konvertor spolupracuje s nasledovnými modulmi GbE SFP:
Názov:SFP-023GSFP-2-3GSFP-203/5GSFP-205/3G
Kód:L1405L1415L1416L1417
Typ optického vlákna:multimodesingle-mode
Prenosový rozsah:2 km20 km
Prenosová rýchlosť:1,25 Gb/s1,25 Gb/s
Vlnová dĺžka
(Tx/Rx):
1310/1310 nm
1310/1550 nm
1550/1310 nm
Konektory:2x LC2x LC1x SC1x SC
Wireless CCTV systems - good practice guidelines (part 1). Wireless transmission is increasingly popular in remote monitoring of dispersed locations, for several reasons:
  • possibility of longer links than in the case of UTP/FTP cable,
  • fast and inexpensive installation comparing to cable systems,
  • satisfactory resistance to interference of wireless digital transmission systems.
However, some issues need specific attention. The first one is the bandwidth of the wireless transmission. Since wired transmission systems transmit data simultaneously in two directions (Full Duplex), the Fast Ethernet link (100 Mb/s) achievs in practice the transmission speeds of 70 Mb/s in each direction.
The wireless technology has to share the transmission channel, so it alternates the direction of the transmission (Half Duplex). In the case of 54 Mb/s link the maximum practical throughput can reach 25 Mb/s in each direction. This is the maximum value that can be significantly reduced due to the length of the link, poor mutual visibility of the antennas, coexistence of other WLANs in the area, significant electromagnetic interference. 54 Mb/s link allows to transmit digital data from up to eight ULTICAM DS-852MF-E K1441 2 Mpx cameras with maximum resolution, at 12 fps.
Wireless Access Point: ULTIAIR 423KC
ULTIAIR N2301 access point
allows to transmit video streams
at speeds up to 25 Mb/s
Gold Medal of Alarm Kielce 2009
for ULTIAIR devices
New DVRs from the world leader - HIKVISION/ULTIMAX. HIKVISION company is the pioneer of H.264 compression in digital video recorders. It has been included into the group of 50 most promising undertakings in the field of advanced technologies in China (the Deloitte ranking). DIPOL company has introduced to its offer the latest HIKVISION DVRs.
A new generation of the recorders is based on newly developed Texas Instruments processors using DaVinci technology. This allows to stay ahead of competition in the development of "intelligent software". The possibilities of the processors multiply the functionality of the new DVRs, new applications can be loaded along with software updates.
HIKVISION DVRs have been known on the Czech, Hungarian, Polish and Slovak market as ULTIMAX series. The network software is compatible with the older and new series of ULTIMAX and HIKVISION DVRs, while the firmware from the new series cannot not be uploaded to the predecessors.

The newly introduced HIKVISION DVRs have been divide into three series - 73xxHI, 81xxHDI and 81xxHFI. Each of them is designed for different types of customers: from small shops and houses, through medium-sized businesses, up to the largest and most advanced monitoring systems with dispersed locations (warehouses, public space, stadiums, large enterprises, cities).
Rekordéry HIKVISION/ULTIMAX série 73... a 81...
The recorders have all features that are important for users and have been thoroughly tested in the previous series:
  • H.264 compression,
  • adjustable bitrate, frame rate, recording quality,
  • SATA interface,
  • possibility of connecting hard drives with a total capacity of 16 TB,
  • possibility of mounting additional accessories (e.g. DVD writer),
  • control via mouse, remote control, a dedicated keyboard, buttons on the front panel.
Medzi novými funkciami stoja za zmienku:
  • clear graphical menu displayed at a resolution of 1280 x 1024,
  • new external design:USB port on the front panel and "Jog dial",
  • even more stable operation,
  • D1 (4CIF) recording even in the lowest models,
  • simultaneous monitoring of up to 16 channels,
  • fast selection of any time point by using the timeline,
  • excellent work on the Internet,
  • VGA output (resolution up to 1280x1024, refresh rate 60Hz) - clear, sharp images
  • solid housing, high-performance buttons buttons and accessories.
Príklad inštalačnej schémy rekordérov HIKVISION/ULTIMAX
Our offer includes 4-channel model (M74040), 8-channel models (M74080, M76080, M78080) and 16-channel models (M74160, M76160, M78160).
Coverage problems have gone away - application of GSM amplifier/repeater. The investor had problems with the GSM signal in the entire three-story recreational building Pokoje Pod Lasem (Rooms on the Forest) in Koscielisko, Poland. Due to location in a valley, the signal inside the building was very weak and often faded. The most important room, in which the GSM signal was to be strengthened, was the office located in the basement of the building.
The installation has been designed and carried out by "Impuls" company from Zakopane, Poland. The system employs Signal GSM-1200 repeater A6780, outdoor antenna ATK-10 850-960 A7015, antenna mount E8735C, panel antenna Trans-Data 7.5-10 A741020, two-way GSM splitter A6812 and Tri-Lan 240 cable E1171.
The GSM repeater has been installed in the attic. The panel antenna has been mounted on the beam of the roof structure, with its front side down. Due to a very low signal level outside the building, the company has installed the ATK-10 A7015 external directional antenna. All components of the installation have been connected with the Tri-Lan 240 E1171 cable. The installers effectively used shielding properties of the tin roof, which allowed to place the two antennas in proximity to each other. To increase the signal level in the basement, there have been used two-way splitter and the internal antenna supplied with the repeater.

In this way there has been achieved full coverage of all available cellular networks throughout the building.
GSM Antenna: ATK 10/850-960MHz (10-element)Antenna support WG-5 (SAT/TV, 35 x 110 cm, galvanized)GSM Repeater Signal GSM-1200Two-way GSM SplitterGSM/DSC/UMTS Antenna: TRANS-DATA KPV7.5/10
The investor is fully satisfied with the effects provided by the repeater and with aesthetics of the installation.
Pohľad na vonkajšiu anténu ATK-10 A7015
Pohľad na A6780 repeater a A741020 vnútornú anténu
Detail na Signal GSM-1200 A6780 repeater
N connectors in WLAN systems - installation instructions. Connectors used for antennas mounted on the outside of buildings should have adequate protection against water. This is a fundamental issue, because a bit of water that penetrates the connection will cause significant (even tens of percent) increase of the dissipated power, simply turned into heat.
In principle, the only connectors suitable for these applications are N-type connectors - designed for military marine applications. The N-male connector E84130 has been designed for use up to 6 GHz with Tri-Lan 240 E1171 or H-155 cable.

The main parameters of connectors which should be noted because they are essential for the transmission, are:
  • Voltage standing wave ratio (VSWR) says about how much of the incident RF power is reflected back to the source of signal (transmitter). This parameter should not exceed 1.5, which corresponds with reflection of ca. 4% of the signal's power. In the case of N connector E84130 this parameter amounts to 1.3.
  • The same feature of connections (impedance matching) can be expressed by return loss (RL), denoted in decibels (dB). It even more explicitly shows how much of the RF power returns to the power source (greater value of this parameter means better matching). For 2.4 GHz installations this parameter should exceed 15 dB (in the case of N connector E84130 and Tri-Lan cable - 18 dB);
  • Insertion loss (IL), in the case of E84130 below 0.5 dB at 2.4 GHz.
The connectors of this series are used in installations operating in 2.4 GHz and 5 GHz bands. They fill in the gap between cheap, low quality no-name connectors and very expensive top-brand equipment.
N-plug on Tri-Lan 240 coaxial cable - Installing
Konektor Nm určený pre koaxiálny kábel Tri-Lan 240 - spôsob montáže na kábel
Greece. The antennas shown in the pictures are parts of wireless links used to provide communications between islands - there are no obstacles between the pairs of the antennas so they are not placed high.
A water heating facility, satellite dish and terrestrial antenna
mounted on turntable - is a common view of a Greek house
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