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

No. 6/2024 (February 5, 2024)

Superconducting material with revolutionary potential.

Chinese scientists have made a breakthrough discovery in the field of superconductors. Researchers from the Hefei Institute of Physical Sciences and the Chinese Academy of Sciences have identified a new superconducting material with a unique lattice structure of (InSe2)xNbSe2. A transition metal sulphide superconductor is a type of superconducting material composed of transition metals (elements in the middle of the periodic table) and sulphur atoms. These materials display superconducting properties below a certain temperature. The newly discovered material has a record superconducting transition temperature of 11.6 K and an exceptionally high critical current density (a measure of the maximum current density a superconductor can conduct before it loses its superconducting properties).
Superconductivity was discovered more than a century ago. Superconductors are materials that can conduct electricity without any resistance. This property allows for efficient transmission of electricity and has potential applications in various fields. Superconductors find a very wide range of applications in energy storage, catalysis processes or the manufacture of integrated circuits. So far, the only limitation are the relatively low transition temperatures of superconducting materials, particularly transition metal sulphides.
The transition temperature of the (InSe2)xNbSe2 material reaches 11.6 K, making it the transition metal sulfide superconductor with the highest transition temperature. Moreover, the material exhibits a critical current density of 8×105 A/cm2^, which is the highest among all transition metal dichalcogenide superconductors. This critical current density is comparable to that of high-temperature superconductors such as copper and iron compounds, indicating its great potential for practical applications. The discovery of this new superconducting material opens up opportunities to further advance research into the phenomenon of superconductivity and develop high-temperature superconductors with improved performance.

Coaxial cable and twisted pair cable in B2ca flammability class.

Within the European Union, all installation cables in buildings are considered construction products subject to regulation. The CPR Directive requires manufacturers to develop and make available a DoP (Declaration of Performance), as well as marking products covered by the standard with the appropriate CE mark. The EN50575 specifies the requirements for: performance in fire conditions, test and evaluation methods for power, control and telecommunications cables used in buildings with a specific fire resistance class. With the introduction of pan-European fire response classes, designers and architects have clear regulations specifying the rules for selecting cables. To achieve increased fire safety levels, the regulations recommend the use of B2ca cables in special buildings that must meet very tight safety requirements (e.g. in hospitals, nurseries, high-rise buildings, office buildings and nursing homes).
TRSIET and NETSET brand cables meet very strict quality requirements, so they maintain their nominal parameters, which guarantee proper signal transmission. Each coaxial cable of TRISET brand is covered by a 5-year manufacturer's warranty, and twisted-pair cables of NETSET brand are covered by a 15-year warranty, taking into account the natural aging process of the cables.
Coaxial Cable (75 ohm, class A++): TRISET B2CA 120 dB 1.05/4.6/6.9 [500m]
TRISET B2CA 75 ohm coaxial cable flammability class B2ca-s1a,d1,a1 E1020_500 meets the legally required flammability class standards. It also has very good transmission parameters and is used in terrestrial, cable and satellite TV systems.
Cat. 6 B2ca U/UTP Cable: NETSET U/UTP B2ca-s1a-d1-a1 /500m/
NETSET U/UTP cable E1615_500 category 6 flammability class B2ca-s1a-d1-a1 meets the legally required standards of non-flammability class. It is successfully used in structured cabling systems for LAN, IP CCTV, etc.

CCTV Sunell: HTML5 for browser-based monitoring.

Sunell devices enable convenient viewing and operation through a web browser using HTML5. This makes it possible to display video without installing additional plug-ins or extensions, which makes them stand out from traditional solutions that require Internet Explorer. The use of HTML5 makes it safe and easy for users to connect to devices using popular browsers such as Opera, Firefox, Edge and Chrome. Using them, it is possible to fully customize the parameters of both the camera and the DVR via a web browser. Convenience of use is enhanced by the ability to fully configure cameras from the DVR (both locally and remotely).

Multimode fibre standards for Ethernet applications.

The development of multi-mode fiber standards is mainly focused on their use in data centers. The possibility of achieving high-speed transmission over short distances and wavelength division multiplexing (SWDM) techniques, combined with the relatively low price of VCSEL lasers, determine the great popularity of multimode fibers precisely in this market segment.
However, investors building their LANs or IP surveillance systems often opt for multimode fibers. These decisions may be economically motivated or result, for example, from the habits of the designer. The following table summarizes the ranges of multimode fiber standards (from OM1 to OM5) in the context of their use in popular Ethernet applications (1 Gbps, 10 Gbps and 40/100 Gbps).
OM1 275 m 33 m    
OM2 550 m 82 m    
OM3   300 m 100 m  
OM4   400 m 150 m  
OM5   400 m 150 m YES
Looking at the above table, one can understand why the main area of application for multimode fibers is the aforementioned data centers. The transmission capabilities (distance) of this type of fiber are relatively small, but sufficient to use them, for example, when connecting cabinets within a server room. Note that only the OM3 standard surpasses the capabilities of copper twisted-pair cables even of the highest categories. OM5 and OM4 do not differ in terms of transmission range, but OM5 allows for a reduction in the number of fibers used by using wavelength division multiplexing (SWDM) techniques.
SWDM technology involves multiplexing four signals at four light wavelengths: 850, 880, 910 and 940 nm and transmitting them in a single transmission medium. Implementation of SWDM technology into an optical network is possible only if the network infrastructure is based on OM5 broadband fiber. Then it is possible to quadruple the bandwidth of the network or significantly simplify its architecture and reduce cabling density.
Multimode Patch Cord ULTIMODE PC-355D (2xLC-2xLC, duplex, OM3, 1.5m)
Patchcords and pigtails with multimode fibers OM3 and OM4 have a distinctive turquoise color (also known as "aqua"). Less common in typical LAN systems, the OM5 standard is characterized by a lime green color.

Mounting a camera for license plate identification.

For maximum effectiveness of license plate recognition, a camera supporting this feature, e.g: - iDS-2CD7A46G0/P-IZHSY(C) (2.8 – 12 mm) K05911 or - iDS-2CD7A46G0/P-IZHSY(C) (8 – 32 mm) K05913 should be installed in such a way that the license plate image of a moving car is properly captured. Before choosing the place of installation, one should take into account the following guidelines: proper angle of view of the front of the vehicle, the number of pixels per license plate in a frame, and the distance at which the camera should be mounted in relation to the place of detection. The following are the basic installation requirements to be met when mounting a Hikvision plate identification camera:
  • the width of the license plate should cover 130...300 p of the image (optimally 150...250 p),
  • the vertical tilt of the camera should not exceed 30°,
  • the horizontal tilt of the camera from the direction of vehicle movement should not exceed 30°.
  • the tilt of the plate in the image should not exceed +/- 5°,

The strongest LTE antenna on offer.

In many cases, when the base station is far from the mobile device there are problems with adequate signal strength. In order to improve it, it is usually necessary to connect a suitable external antenna to the modem. However, sometimes the use of an external antenna is not needed to improve the LTE signal, but, for example, to force data transmission between a particular base station and modem. Note that the LTE antenna should be broadband – this is related to the operation of LTE networks on multiple frequencies and their aggregation.
The TRANS-DATA LTE KYZ 10/10 A741024 is an outdoor, directional log periodic MIMO antenna for use with LTE/GSM/3G modems. The antenna has 10 dBi gain. It is designed to work with LTE modems (equipped with two antenna connectors).
Key features of TRANS-DATA LTE KYZ 10/10 A741024 antenna:
  • Outdoor directional logarithmic antenna,
  • MIMO 2x2,
  • Multiband: 806-960 MHz, 1710-2700 MHz,
  • Multi-standard: GSM, DCS, UMTS, WLAN, LTE,
  • Gain:
    • 9.5 dBi (806-960 MHz),
    • 10 dBi (1710-2700 MHz),
  • Short circuit for DC,
  • 10 m lead terminated with SMA plug,
  • Housing made of durable ABS plastic resistant to UV radiation and weather conditions,
  • Mounted to a mast with U-bolts (optionally to a horizontal pipe)
4G/3G/GSM Antenna: TRANS-DATA LTE KYZ 10/10 MIMO (with 10 m cable + SMA)
TRANS-DATA LTE KYZ 10/10 MIMO antenna + 10 m lead with a SMA A741024 plug

New products offered by DIPOL

TP-Link 100M L1441 SFP+ module allows you to connect an Ethernet port (10/2.5/1/0.1G) to an SFP+ interface.

NEXT indoor subscriber surface-mounted FTTH 2HP outlet
NEXT surface-mounted indoor FTTH 2HP L5303 subscriber outlet is designed for wall mounting. Used in FTTH networks for terminating subscriber lines. NEXT outlet has space to mount optionally up to 2 adapters in SC simplex standard (in version without flange SC/APC L4224) and dedicated fields for max. 4 splice covers. The outlet is protected against accidental opening.

Multi-system Dome Camera: ColorVu Hikvision DS-2CE72HFT-F28 (5 MP, 2.8 mm, 0.0005 lx, white light up to do 20 m) HD-TVI, AHD, HD-CVI, CVBS
Multi-system dome camera ColorVu Hikvision DS-2CE72HFT-F28 (5 MP, 2.8 mm, 0.0005 lx, white light up to 20 m) HD-TVI, AHD, HD-CVI, CVBS M75270 is designed for use in monitoring systems based on HD-TVI DVRs. The user can select the required video standard from among HD-TVI, HD-CVI, AHD, or the legacy CVBS (ANALOG). The choice of the standard is made by the micro-switch located on the cable. The camera generates high-quality 5 MP images with high clarity, brightness and vivid colors. With a high sensitivity of 0.0005 lx and a built-in white light illuminator with a range of up to 20 m, the resulting image has high quality and good performance even in low or no light conditions.

Worth reading

Terra: terrestrial TV, radio and signal from 2 satellites in 1 fibre. Terra's optical TV signal transmission system offers the possibility of using two different transmitters within one system. These transmitters have the same functionality (conversion of TV signals from coaxial cable to optical fibre), with one transmitter generating a signal at 1310 nm wavelength (A3031) and the other at 1550 nm wavelength (A3055). The use of two different transmitters allows the signals they generate to be combined into a single fibre. To combine the signals (and to separate them on the other side of the fibre), a so-called WDM coupler L383521 is used. This element operates similarly to a traditional TV crossover....>>>more
Satellite TV (2 satellite positions), terrestrial TV, radio – distribution in 1 fibre. Signal division into 2 optical paths.
FAQ - LTE, GSM, DCS, 3G repeaters
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