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

No. 03/2013 (Jan. 14, 2013)

With light, but without the fiber.

British scientists have started work on a new wireless communication system not using ubiquitous radio waves but laser light. The new technology, as usual, has been originally focused on military applications, but it can be quickly implemented in the civilian sector where the demand for broadband solutions is enormous. Until then, however, the scientists have to complete a series of tests. At the moment, they are carrying on research on the transmission of audio signals from drones to a receiving station. As a sample they use the well-known AC/DC song - "Highway to Hell".
Such drones are to use laser communications
The main problem of unmanned military aircraft (combat or espionage) is the limited range of operation. To increase the range, engineers gradually reduce the weight of the machines, using lighter components and weapons, which translates into a reduction in fuel consumption of their engines and possibility of longer missions.
EADS researchers led by Yoann Thueux are aimed to introduce a new wireless communication system called Dazzle. Comparatively heavy radio equipment is to be replaced by an optoelectronic device reflecting and modulating the laser light emitted from a control station. So, the principle is simple - the laser beam directed at the flying drone is reflected by the machine back to the the station, together with data from sensors and cameras, and the information is received and processed by the station.
The technology is relatively cheap and provides very efficient data transmission, even at data rates up to 1Gbps. What's more - eavesdropping or monitoring of the transmitted data is not possible, which is extremely important for military applications. Currently, the range of the laser link is limited to about 2 km, but it is probably only a temporary inconvenience.
Research on this technology has been ongoing for some time. In 2008, Hani J. Kbashi from the University in Baghdad published a study on theoretical principles, basic calculations and practical solutions for laser equipment for wireless transmission using Intensity Modulation with Direct Detection (IM/DD). The EADS project is carried out in parallel and employs the same transmission method.
In the near future, wireless optical transmission may revolutionize the market for multimedia services. Extremely broadband characteristics and easy implementation are the factors that can decide on the popularity of this technology. Maybe, in a short time the light will dominate not only in the cable infrastructure but also in wireless systems.

How to select the appropriate SFP module?

Ultimode SFP modules are dedicated for use in switches and media/video converters, they determine the network interface and provide flexibility in system configuration. Although each Ultimode device with SFP slot is able to handle any Ultimode SFP module, correct optical connections in active networks require proper selection of the modules and their pairing.
The diagram and table below show the correct combinations of gigabit Ultimode modules. First of all, the user should pay attention to the Tx/Rx wavelengths. A module transmitting data at the wavelength of 1310 nm and receiving it at 1550 nm has to work with the complementary module receiving data at the wavelength of 1310 nm and transmitting it at 1550 nm. Other modules, which transmit and receive data at the same wavelength, use links with two fibers that have to be properly connected to the inputs and outputs on both ends of the link.
The type of fiber optic connectors in the modules is of secondary importance (for example, it is possible to use the pair of L1416 and L1419 modules, but it would be rather impractical).
SFP Transceiver: ULTIMODE SFP-023G 2xLC (two multimode fibers up to 2 km)SFP Transceiver: ULTIMODE SFP-023G 2xLC (two multimode fibers up to 2 km)SFP Transceiver: ULTIMODE SFP-203G 2xLC (two single-mode fibers up to 20 km)SFP Transceiver: ULTIMODE SFP-203G 2xLC (two single-mode fibers up to 20 km)SFP Transceiver: ULTIMODE SFP-203/5G SC (single-mode fiber up to 20 km)SFP Transceiver: ULTIMODE SFP-205/3G SC (single-mode fiber up to 20km)SFP Transceiver: ULTIMODE SFP-203/5G LC (one single-mode fiber up to 20km)SFP Transceiver: ULTIMODE SFP-205/3G LC (single-mode fiber up to 20km)
The typical pairing of gigabit Ultimode SFP modules
Name: SFP-023G SFP-203G SFP-203/5G SFP-205/3G SFP-203/5G SFP-205/3G
Code: L1405 L1415 L1416 L1417 L1418 L1419
Fiber type: MM SM
Range: 2 km 20 km
Data rate: 1.25 Gbps
Tx/Rx [nm]: 1310/1310 1310/1550 1550/1310 1310/1550 1550/1310
Connectors: 2xLC 1xSC 1xLC
The comparison of popular Ultimode SFP modules

Viewing digital broadcasts on analog TVs.

In the case of designing SMATV systems for hotels, motels, boardinghouses, recreation centers etc. equipped with many older TVs not compliant with current DVB-T system, a requirement for the replacement by new ones will usually not be accepted by the owners. The ideal way to solve the problem is to use a headend integrating DVB-T and DVB-S/S2 receivers plus RF modulators. The solution presented below based on devices from Mixpol and TERRA allows for reception of a wide range of channels from DVB-T multiplexes and satellite transponders without the need for replacing the analog televisions.
Aluminum Satellite Dish: FAMAVAL Off-Set 100 LH (100cm)Coaxial Cable 75 ohm: TRISET-113 PE (gel-filled) [1m]QPSK CI Receiver RDC-313 (QPSK/PAL, for MMH-3000 headend) Base Unit UC-380 (for Modular Headend MMH-3000)Coaxial Cable (75 ohm): TRISET-113 1.13/4.8/6.8 [1m]Building Amplifier:Terra HA-1262-Way TV/FM Splitter R-2 Signal2-Way TV/FM Splitter R-2 SignalBuilding Amplifier:Terra HA-126DVB-T / UHF PAL Headend: Mixpol DVB-08T (8 channels)DVB-T / UHF PAL Headend: Mixpol DVB-08T (8 channels)8-Way Splitter R-8 Signal8-Way Splitter R-8 Signal2-Way TV/FM Splitter R-2 SignalCoaxial Cable 75 ohm: TRISET-113 PE (gel-filled) [1m]UHF TV Antenna: DIPOL 44/21-69 Tri DigitUniversal QUATRO LNB: Inverto Red Extended 0.3dB
An example of a hotel SMATV system distributing DVB-T and satellite broadcasts as PAL channels
The MMH-3000 headend consists of the Base Unit UC-380 R81700 and four QPSK CI receivers with VSB PAL modulators (RDC-313 R81710). The receivers provide 4 satellite TV programs from four transponders, in the form of analog PAL channels. The RF channels are then amplified by the HA-126 R82303 amplifier and combined with 16 PAL channels from two DVB-T / UHF PAL headends Mixpol DVB-08T R951680. So, the system distributes 20 PAL channels that can be received by all the televisions.

How to operate CCTV system with DVR located away from the monitor?

There are video surveillance systems where the DVR should be located in some distance from the operator's room. This poses the question: can the system be controlled only over LAN? No, the solution presented below allows for transmission of video and audio from the DVR to the operator's site and control commands in the opposite direction (using both mouse and remote control) without the use of LAN.
Compact Outdoor Camera: Sunell SN-IRC4920AJ (day/night, D-WDR, 600 TVL, Sony Effio-E, 0.08 lx, 2.8-10mm, OSD, IR up to 40m) Vandal-proof Dome Camera: SN-FXP59/30UIR (650 TVL, Sony Effio-E, D-WDR, 0.03 lx, 2.8-10mm, IR up to 20m) HDMI Extender Signal-HD (2x Cat 5e, 50m)USB RJ45 Extension AdapterIR Remote Control Extender: Signal-Link (using existing antenna cabling)Full HD LED Monitor: AG Neovo LW-27 (27CCTV Network DVR: TREND 260X16 (H.264, 16 channels, HDMI)
The components for transmitting video, audio and control signals in a CCTV system
with a DVR located up to 50 meters from the operator's site
The audio and video signals are transmitted with the use of the HDMI extender Signal-HD H3602 over a distance up to 50 m (via two UTP Cat 5e cables). The operator can control the DVR with a mouse and/or IR remote. The USB RJ45 Extension Adapter M1680 also ensures range of the USB mouse connection of 50 m (using Cat5/Cat5E/Cat6 cable), whereas the optional IR Remote Control Extender Signal-Link R93109 can easily transmit the IR remote commands (with ample reserve - its range is up to 150 m).

Megapixel IP CCTV system in MONDI-HOLIDAY HOTEL Bellevue.

The Austrian hotel MONDI-HOLIDAY HOTEL Bellevue is located on the Stubnerkogel in Bad Gastein known for its rich ski and spa facilities.
Communication Antenna: ATK 5/400-470 MHz (5-element)
The hotel has been equipped with a professional IP CCTV system by Radio Service Jan Mazurek. The system consists of twelve Sunell 2 MP cameras and is managed by advanced IP video surveillance software NUUO. Two K1691 cameras monitor the hotel parking lot, another outdoor camera is directed towards the main entrance and a playground for children.
Communication Antenna: ATK 5/400-470 MHz (5-element)
High-resolution outdoor cameras provide a lot of detail
Communication Antenna: ATK 5/400-470 MHz (5-element)
Indoor cameras, also with 2 MP resolution, monitor rooms with open access,
such as bowling alley, pool hall, ski storage room
The cameras are powered from 16-port PoE panel M1611. In the case of one camera, installed at a distance of about 300 m from the server, the data is transmitted via optical link. The link uses ULTIMODE L11025 Ethernet media converters that are placed in L5215 adapters and installed in RACK cabinets.
With NUUO software, the owner can view the video from the cameras as well as browse the archives via the Internet from anywhere in the world (on PC, tablet, smartphone).

Ubiquiti devices available in the DIPOL e-store.

Ubiquiti access points are characterized by high performance and stability, all for a low price. They use AirMax protocol that allows for elimination of "hidden nodes" problem by allocating time slots (TDMA) for collision-free communication. The clock signal comes from GPS satellites. The protocol enables maximum throughput even with dozens of client stations connected to the access point (AP).
Access Point Ubiquiti NanoBridge M2 (18dBi 2.4GHz MIMO)
Access Point Ubiquiti NanoBridge M5 (22dBi 5GHz MIMO)
AP Ubiquiti NanoBridge M2
2.4 GHz MIMO 18 dBi N2532
AP Ubiquiti NanoBridge M5
5 GHz MIMO 22 dBi N2535
Access Point Ubiquiti BulletM2 HP
Access Point Ubiquiti BulletM5 HP
AP Ubiquiti BulletM2 HP N2592
and AP Ubiquiti BulletM5 HP N2594
Access Point Ubiquiti AirGrid M5 (5GHz High Power 27dBi)
Access Point Ubiquiti AirGrid M5
5 GHz High Power 27 dBi N2545
New products offered by DIPOL:
Wall Mount for Sunell Cameras: SN-CBK624
F-type Right Angle Adapter
Patch Panel (1U, 50 8P4C ports + cable holder)
Wall Mount
for Sunell Cameras
Right Angle Adapter
Patch Panel
(1U, 50 x 8P4C)
Worth reading:
Distributed analog video monitoring system based on Ultimode video converters and optical fibers. A manufacturing company decided to expand its premises by including new production facility. As the previous analog video surveillance system met functional and quality requirements, the expansion was not a reason for changing the general concept, but became an occasion for the integration of the system with the help of fiber optic technology... more
The architecture of the video surveillance system with optical links

Quickly and professionally - PCT compression connectors. Connectors do not have significant impact on the cost of antenna or CCTV systems, but are crucial to signal quality, labor intensity, and reliability of the systems. The most popular kind of connectors used in professional applications are compression connectors, much quicker to mount and much more reliable than the rest. High screening efficiency and protection against penetration of water ensure stable transmission parameters... more
Compression F connector PCT-TRS-9-NT E80340 for TRISET-113 cables

How to build a low-cost IP CCTV system? An economical IP video surveillance system can be based on megapixel IP cameras from Sunell. Thanks to the ability to save surveillance data on remote FTP servers (such services are offered by hosting companies), there is no need for buying and maintaining an NVR operating on 24/7 basis. The camera can be directly connected by entering login, password, IP address and port number for FTP connection, so the only additional device is a router with Internet access... more
The architecture of economical IP CCTV system with video recording on a remote server
Mobile Sat Dish: Camping 35 (offset)