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

New data transmission speed record in optical fiber.

KDDI Research, a Japanese research institute, in conjunction with Sumitomo Electric Industries, has announced the establishment of a new speed record of fiber optic transmission. Up to now, one fiber could transmit data at a maximum speed of 2.15 Petabit per second (Pb/s). The Japanese, using one multicore fiber (19 cores) and 114-fold spatial multiplexing, attained 10.16 Pb/s over a distance of 11.3 km. The bandwidth of this order is so huge that it could ensure simultaneous 100 Mbps transmission to 100 million devices.

Scheme of the experiment with the achievement of 10.16 Pb/s in one multicore optical fiber

Currently, backbone networks of telecom operators are being built almost exclusively in fiber optic technology. The requirements for their bandwidth are constantly increasing. This is particularly evident in the case of mobile networks. According to a Cisco report, by 2021 mobile traffic will account for 20% of all network traffic and will grow at a rate of 49% per year. This forces the development of new, more efficient connections, or at least much better use of the existing ones e.g. by improvements in coding. Such new optical connections can be used for the deployment of the next generation of mobile networks, 5G, with higher requirements for both speed and latency.

GSM amplifiers/repeaters - new directive, new standards.

Recently, European countries have tightened the regulations applicable to some wireless telecommunications equipment.

After June 12, 2017, all radio equipment being placed on the market or put into service must comply with the Directive 2014/53/EU.

Currently, the equipment must be tested for compliance with the following standards:
(more info)

Declaration of Conformity with all obligatory directives and standards for A6765, A6775, A6785 amplifiers/repeaters

Conversion of DVB-S/S2 satellites signals to DVB-T multiplexes with the use of Wideband technology.

The series of TERRA transmodulators has been extended with a new model, TDX-440 R81614. The transmodulator is used for reception of DVB-S/S2 (8PSK/QPSK) signals, selection of desired channels and retransmission of them in COFDM format in chosen RF channels in VHF/UHF frequency range. The device allows the user to receive and manage a range of free to air satellite channels. One TDX-440 R81614 panel can receive channels from eight satellite transponders and convert them into four neighboring DVB-T multiplexes, each with maximum throughput of 31.66 Mbps. A great advantage of this solution is the ability to integrate the transmodulator with dSCR/Unicable multiswitches (SRM-521 R80521, SRM-522 R80522 models) that allow for independent distribution of DVB-S/S2 broadcasts via single cable. The cable provides the DVB-S/S2 channels from the whole band (10.7-12.75 GHz) to the transmodulator that enables the installer to create 4 DVB-T multiplexes from previously selected 8 satellite transponders (with FTA channels).

Checking the continuity of fiber optic cable using a reflectometer.

The stage of laying cables is always one of the most time-consuming, and thus costly phases of each installation. In the case of fiber optic cables, they can be easily damaged by incorrect transport or storage (microbending), so it is particularly important to check them before installation in cable ducts, jointing chambers, walls, etc.

Theoretically, a cable can be checked using a light source and power meter, but usually it is difficult to implement this method because of the lack of access to the other end of the cable wound on the drum. In such a situation the proper technique is to use a reflectometer. It is enough to weld a pigtail to the free end of the cable and connect the reflectometer. Due to the fact that there is a certain event dead zone (the minimum distance after which a reflection can be detected by the reflectometer), the first several or so meters of the cable could not be verified. For this reason one should connect in series an additional cable run with the necessary length.

The whole process of checking the cable on the drum takes a few minutes and allows the installer to avoid the disastrous deployment of a damaged cable. The following figure shows an example of reflectometric measurement of a 500-meter section of optical fiber wound on a drum. This cable was probably damaged at the stage of production.

Sunell IP camera for demanding users.

DIPOL offers now new model of Sunell IP camera, SN-IPR54/14AKDN/M(III) K1682, characterized by modern design and solid metal housing with IP66 rating. The compact IP camera is equipped with powerful IR illuminator (17 Super Flux LEDs) with range up to 40 m. The varifocal 2.8-12 mm lens has viewing angle adjustable within 89°-35° range. Sony 1/2.9" Progresive Scan CMOS image sensor with resolution of 1920x1080 pixels (Full HD) provides high quality images with low noise level. Additional features improving image quality, such as digital noise reduction (2D, 3D-DNR), digital WDR, back lght compensation (BLC), high light compensation (HLC), digital image stabilization (DIS), defogging function (DeFog) make the camera very useful even under difficult conditions. The camera works very well with Hikvision NVRs from E, K and I series.

View of the Sunell SN-IPR54/14AKDN/M(III) K1682 camera

Sunell cameras have a very friendly, intuitive and modern interface. Thanks to Flash technology, the image can be displayed in any web browser.

Configuration window of the Sunell SN-IPR54/14AKDN/M(III) K1682 camera

Visualization of CCTV coverage with E-map.

In the case of extensive video surveillance systems, the operator should know exactly the layout of the camera points. It is necessary for quick identification of the monitored areas in case of emergency. The IVMS-4200 client software supplied with Hikvision NVRs enables the user to import layouts of buildings and field maps as JPEG/bmp files. The plans will be the backgrounds for placing camera symbols onto, in accordance with their actual locations.

E-map window in a CCTV system based on Hikvision DVRs/NVRs

Each camera point can be correlated with specific alarm event, such as motion detection. When the alarm is triggered, a siren symbol by the camera icon informs the operator about the event. Double-clicking on the camera symbol allows the operator to quickly focus on the area and assess the situation. With a large number of cameras, E-map enables the operator to find out whether the alarms come from neighboring cameras and to follow the intruder or monitor other emergency situations.

5 MP video resolution in analog CCTV systems. The next step in the evolution of analog video monitoring is the availability of solutions for systems with 5-megapixel image resolution. Thanks to higher resolution of such systems, they can either employ a fewer number of cameras (each camera with wide viewing angle can cover a larger area) or provide more detailed surveillance information. The available solutions are based on Turbo HD 3.0 concept, so the requirements for cables and passive components in the 5 MP systems are the same as for 2 MP and 3 MP versions. The cameras with lower resolutions as well as cameras operating in AHD and HD-CVI systems can also be used in the systems... >>>more

Operation options of Turbo HD 3.0 DVR DS-7216HUHI-F2/S M75516
supporting cameras with image resolutions up to 5 MP

Fusion splicer Signal Fire AI-7