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

Floating photovoltaic panels – this is how farms are built in Asia.

Singapore-based Sunseap Group and central government agency BP Batam, responsible for land development on Indonesia's Batam Island, have signed a contract to build the world's largest floating photovoltaic (FPV) and energy storage system (ESS) on the Duriangkang reservoir in the south of the island. The project is estimated to be worth around US$2 billion.

The photovoltaic panel system is expected to have a capacity of 2.2 GW and cover an area of about 1,600 hectares, making it the largest system of its kind in the world. The energy storage facility is also expected to have a record capacity of 4,000 MWh.

Sunseap expects the PV farm to generate more than 2,600 GWh of electricity annually, potentially offsetting the burning of more than 1.8 million tons of coal. The company says the power generated and stored will be used by Batam, but if there is a large surplus of power generated, the plan is to be able to deliver it to Singapore, some 50 km away, using a cable located on the seabed.

Measuring the DVB-S/S2 satellite signal with

To ensure proper reception of satellite TV, many people, who are afraid of setting up and installing a satellite dish on their own, use the services of an expert. In fact, this is not a simple task for an inexperienced DIY enthusiast, and the proper adjustment of the antenna dish has a key impact on the quality of satellite signal reception. If the satellite signal is supplied to several receivers, multiswitches are used, to which cables from a quatro LNB should be connected. Such system requires 4 cables to be connected. An ideal solution in such a situation is to use the Signal ST-5150 R10842 meter.

What tool to use to configure the 2nd generation Hikvision IP/2-Wire video intercom system? In order to configure the 2nd generation Hikvision IP/2-Wire video intercom systems, you need additional software iVMS-4200 from v3 (devices, except 2nd generation Villa door stations, do not have built-in webserver). After connecting a door station and monitors, activate them using the SADP or iVMS-4200 application, assigning the administrator password, just as in the case of IP cameras or DVRs. After activating the devices and setting the appropriate IP addresses, add them to the iVMS-4200 application. Only after correct addition will it be possible to go to the "Remote settings" tab of each device and to perform its full configuration.

Monitoring with remote display for multiple users.

Viewing images from a classroom or monitoring children in the kindergarten requires an efficient server that will deliver an image stream to the appropriate number of users. Such system is made possible when using Hikvision equipment and the free Hik-Connect service. It can make up a system with up to 64 users having simultaneous access to the connected cameras. Access rights can be modified individually for each account, so the administrator can decide for example which cameras can be viewed by a given user and whether he should have access to recordings. The schematic diagram of such a system is shown below.

Why is calibration of fiber optic splicers important?

Calibrating a fiber optic splicer involves adjusting the power and temperature of the generated arc to the current environmental conditions. A properly adjusted arc allows for proper splices to be made, both in terms of attenuation and strength. Therefore, calibration should always be performed before the actual splicing – at the beginning of work or in the case of drastically changing conditions (e.g. a sudden drop in temperature resulting from splicing inside a building and further work outside).

The most expensive models of fusion splicers are equipped with pressure and temperature sensors that allow for an automatic calibration in real time. Most popular devices, however, require manual calibration, which will take several minutes. Skipping calibration will not always result in bad splices. However, there is a risk that some, even those indicating low attenuation, will be very weak and unstable mechanically (e.g. if the splicing temperature is too low, they may sometimes crack after an hour).

The Signal Fire AI-8C L5870 fiber optic splicer is based on popular calibration method – the fibers placed in the welding compartment are subjected to successive electric arcs. The fibers are fused and the splicing software measures and analyzes the distance over which the fiber ends retract. Based on the measurement, the appropriate arc parameters are determined.

The calibration of Signal Fire is done by selecting "Arc Calibration" option in the management application. When the fibers are inserted into the splicing chamber and the cover is closed, the calibration process starts automatically. When finished, the splicer switches to normal mode, i.e. is prepared for regular splicing operations.

In the winter period, installers should pay particular attention to the proper preparation of the splicing equipment before commencing work. A splicer that has spent the night in a car parked outside and has just been brought into a room with room temperature is not ready for immediate use: the fogged camera lens may result in erroneous fiber positioning and auto-focus problems. To avoid such issues, installers should make sure splicers are stored in appropriate temperature conditions.

Signal Fire AI-8C L5870 splicer

Central management of a computer network.

Omada SDN platform for network infrastructure management integrates such network devices as: access points, switches and network gateways. Omada SDN provides comprehensive management of the entire network from the cloud level. The system allows you to create a highly scalable network, fully controlled by a single system. This results in seamless wired and wireless connections that are essential in hospitality, education, retail, offices and many other industries.

Omada SDN platform - central management of TP-Link network devices.

Equipment compatible with Omada SDN:

A video demonstrating the capabilities of the platform (English):

How to receive DVB-T2/HEVC signal in a SMATV system with DVB-T/MPEG-4 receivers? By 2022, a new standard of terrestrial television broadcasting, called DVB-T2/HEVC, will be introduced throughout the European Union. The introduction of the new broadcasting standard should not require changing the receiving antenna, but one may need to change its direction or upgrade the TV system if the TV sets do not support DVB-T2 standard with HEVC codec (also known as H.265 or MPEG-H part 2) and process audio encoded according to the E-AC-3 standard (also known as Dolby Digital Plus or DD+). While in the case of a small system with one or several TVs there should be no problem (it is enough to buy a DVB-T2/HEVC decoder that is connected via HDMI output), it may be quite an issue for larger number of TVs (especially in boarding houses, hotels and the like)...>>>more

Diagram of TV system allowing to receive DVB-T2/HEVC signal and convert it to DVB-T/H264 standard.

Coaxial cable for emergency exits