TV-SAT, CCTV, WLAN Dipol Weekly Review

Brain implant almost like a network access point.

Researchers at Columbia University, together with teams from Stanford University, the University of Pennsylvania and NewYork-Presbyterian Hospital, have developed a new type of BISC brain implant that is the first to use a single extremely thin silicon chip to create a fully wireless and broadband connection between the brain and a computer. Placed directly between the brain and the skull, the device acts as a subtle layer of electronics capable of reading and stimulating neuronal activity with unprecedented resolution, paving the way for more advanced treatments for epilepsy, paralysis, speech, vision and other neurological conditions.

The new system uses a miniaturised CMOS chip that is only 50 micrometres thick and has a total volume of about 3 cubic millimetres. The flexible structure fits perfectly into the cerebral cortex, allowing neuronal signals to be recorded without the need for large electronics containers, which previously required removing sections of the skull or running wires into brain tissue. The implant integrates 65536 electrodes, 1024 channels of simultaneous recording and 16384 channels of stimulation, which significantly exceeds the performance of currently available medical brain-computer interfaces. The whole works in conjunction with a wearable relay station that powers the implant and transmits data at 100 megabits per second over a dedicated ultrawideband link, which is then relayed over an 802.11 WiFi network to any computer. The BISC architecture also includes a dedicated instruction set and a complete software stack that enables the use of advanced machine learning algorithms to decode the user's intentions, perceptions or states from vast sets of brain signals.

Preclinical tests have shown that the implant can be safely inserted through a small incision in the skull and placed in the subdural space without risk of brain damage. Its paper-thickness and lack of tissue-penetrating wires and electrodes help to limit inflammatory reactions and signal degradation. Studies in the motor and visual cortex have confirmed the stability of the recording and the potential to work with stimulation techniques, and the miniaturisation itself paves the way for future implants that also use light and sound. In order to accelerate the implementation of the technology, team members have established Kampto Neurotech to develop commercial versions of the chip and prepare the technology for clinical trials. Although the device already stands out for its technical capabilities beyond the available BCI interfaces, the ultimate significance of the technology is yet to be revealed. Time will tell whether the combination of ultra-precise neuronal recording, full wireless capability and integration with advanced artificial intelligence will become the foundation for new treatments for brain diseases and the ways in which humans will use machines and interact with AI systems.

How to make an 8J switcher with universal cable?

The following pictures show the next steps in completing the termination of the 8-fibre DRAKA L76008 universal cable in the L51454 RACK 1U switcher. SC duplex adapters L42211 and Ultimode PG-171A-1 SC/UPC colour pigtail kits L34171A were used.

The Tri-shield cable family by TRISET-302.

The TRISET-302 cable family is a new series of high-quality type RG-6 coaxial cables designed for the transmission of DVB-T2 TV and DVB-S/S2 satellite signals. They are characterised by low attenuation, high resistance to interference and robust construction, making them an ideal choice for small domestic and professional community installations. They are Tri-Shield cables, with a shielding class of A+ and a copper core of 1.02 mm. The range includes indoor cables with different reaction to fire classes: TRISET-302 Eca E1005_250, TRISET-302 Dca E1006_500, TRISET-302 B2ca E1007_500 and the outdoor cable TRISET-302 Fca E1008_250.

Improving mobile phone network coverage in the house.

As a result of the high attenuation of the walls and windows, the mobile phone signal is often too weak inside the house to be able to talk comfortably on the phone. The solution to this problem can be the GDW-505 A6777, which is used to amplify the GSM, DCS, 3G, LTE signal and bring it indoors. The amplifier should be connected to an external antenna directed towards the operator's base station and an internal antenna that will distribute the signal amplified by the amplifier.

In the placement of indoor antennas, attention should be paid to the number of rooms to be covered by the amplified signal and their area. During the installation, it is important to remember about a large distance between the external and internal antennas (at least 5 m if there is an obstacle in the form of a ceiling or roof). Antenna installations (in the case of placing an antenna on the roof) should be started from the highest level, because it is possible to cover two floors with one antenna. DIPOL has three antennas dedicated for signal amplifiers. They are TRANS-DATA antennas: A741001 (fixing to suspended ceiling or plasterboard), A741002 (fixing to the ceiling with a wall plug), and A741021 (directional antenna for walls).

Which SD cards to use in surveillance?

SD cards are a key component of surveillance systems and are used in both IP cameras and mobile recorders. The choice of the right card determines recording stability, recording quality and operational reliability. In the context of monitoring, the technical parameters of the card, such as capacity, speed class and durability, are important.

SD cards are divided into SDHC and SDXC. SDHC includes smaller capacities and is compatible with older devices. These cards use the FAT32 file system and have a maximum capacity of 32 GB.
SDXC offers a larger capacity and is designed for modern camcorders and long-term high-definition video recording. The file system is exFAT, allowing for large video files and long-term recording sessions, and the capacity of these cards can range from 64 GB to 2 TB.

Standard data recording involves random operations on various files. The Class and UHS Speed Class designations are relevant in this context. Class 10 specifies a minimum write speed of 10 MB/s and ensures stable recording of Full HD video.
Cards with the UHS Speed Class designation, such as U1 and U3, are designed for the Ultra High Speed interface. U1 guarantees a minimum write speed equivalent to Class 10, while U3 meets the requirements of modern devices recording video at high resolution and high bitrate. These designations indicate that the card maintains stable data recording.

This is the most important designation if we are dealing with the recording of video from high-definition cameras (UHD or higher) or mobile recorders (multiple channels), because it refers to a continuous video stream where each frame is recorded sequentially. In this mode, the most important thing is the stability of the recording throughout the recording time, which prevents image stuttering and frame loss.
Cards with the V10, V30, V60 or V90 designation are tested for continuous video recording and provide a specified minimum recording speed in MB/s. The V30 card, for example, guarantees that video recording will not drop below thirty MB/s throughout recording. These types of cards are indispensable in camcorders or mobile registrars where high recording stability is required.

Cards labelled High Endurance or Pro Endurance are resistant to continuous recording, high temperatures, vibration and long-term use. Such cards are particularly recommended for 24/7 monitoring, mobile recorders and drones, where reliability and long media life are required.

LED indicators in SIGNAL PRO multiswitches. SIGNAL PRO series multiswitches have been designed with the installer's convenience and reliability of the whole multiswitch installation in mind. One of the important improvements is the use of LED indicators assigned to individual subscriber outputs. Thanks to this solution, the installer can immediately assess the status of the signal in each output socket. In practice, this means that already at the start-up stage of the installation it is possible to easily verify the correctness of the connections and detect possible irregularities - without the need for additional diagnostic tools...>> more