2020 Augustpage 4

OSCE announced suppression of signals from its UAV in Donetsk region

OSCE observers appealed to the liaison officer of the Ukrainian security forces, who denied the interference with the UAV of the OSCE mission by the military.

MOSCOW, November 5 – RIA Novosti. OSCE observers reported an incident involving the use of radio interference against an unmanned aerial vehicle (UAV) of the organization during its flight over the territory of the Donetsk region.

The Special Monitoring Mission (SMM) report says the incident took place on 3 November over the village of Chermalyk, 40 kilometers northeast of Mariupol. The OSCE unmanned aerial vehicle was exposed to unknown radio interference, disrupting the normal operation of the device, at 13.01 and 13.19 local time. After the UAV landed, OSCE experts deciphered the received data, which revealed that the aircraft’s GPS signals were being jammed by an drone jammer, according to the SMM report. The report notes that this is the third incident involving SMM drones in Ukraine since October 23.

drone signal jammer

A test launch of the first UAVs, which are supposed to monitor the ceasefire in eastern Ukraine, took place on 23 October. The OSCE reported that the UAVs will fly in three directions: south of Donetsk and to the Sea of Azov, east – to the Russian-Ukrainian border, and also west – towards the contact line.

In April, the Kiev authorities launched a military operation in eastern Ukraine against residents who were dissatisfied with the February coup. According to the UN, as of October 31, the number of victims of the conflict exceeded 4 thousand people, more than 9 thousand were injured. With the mediation of Russia and the OSCE, the parties agreed on an armistice from September 5. In general, it is respected, but the parties periodically accuse each other of violating it.

South Korea accused North Korea of jamming GPS signals

South Korean authorities said North Korea is using so-called radio jammer to suppress GPS navigation systems in border areas.

According to the authorities, it started about a month ago in several places at once along the border, but stopped last Thursday.

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This reportedly led to disruptions in the navigation systems of 110 ships and aircraft, as well as to interruptions in mobile telephony.

A spokesman for the South Korean ministry for the unification of the two countries called these actions by Pyongyang a provocation, Agence France-Presse reports.

South Korean media report that Seoul has accused its northern neighbor of jamming GPS signals for at least the fourth time since 2010.

At the same time, it is reported that, most likely, the equipment for signal suppression was supplied to the DPRK from Russia.

On Friday, the South Korean military reported that the DPRK had once again launched a ballistic missile at sea, despite international sanctions and criticism from world powers.

Last week, North Korea announced an artillery exercise simulating an attack on the official residence of the South Korean president.

Roskomnadzor has declared illegal the suppression of the cellular signal during the exam

Roskomnadzor confirmed that it considers it illegal to use means of jamming cellular communications during school exams. According to the press secretary of the department Vadim Ampelonsky, the State Commission on Radio Frequencies has not yet prepared the procedure for using “jammers” on the Unified State Exam. According to him, Roskomnadzor is obliged to fine schools that jam the signal of mobile phones without this document.

He noted that schools do not have the right to use “jammer” when passing the exam.

jammer signal device Powerful

The use of cell signal suppression devices without permits is prohibited under current legislation. Including because this can interfere with the cellular signal, the channels of the police, army and special services, – he explained. – And if such illegal use is detected, the territorial bodies of Roskomnadzor interacting with the radio frequency service are obliged to suppress it.

At the same time, Ampelonsky admitted that “in some cases, the use of means of suppressing cellular signals is appropriate.” He confirmed that Roskomnadzor discussed with Rosobrnadzor the issue of protecting exams from cheating using mobile phones and radio headphones.

A draft decision of the State Commission on Radio Frequencies was prepared, which provided for the development of specific parameters of both the suppressors themselves and the signal emitted by them, – said Vadim Ampelonsky. – The proposed solution provided for the possibility of using the suppressors in closed rooms at the direction of the federal executive authority. If we are talking about schools, then it could be Rosobrnadzor. And at the same time, the power level of the suppressor signal should not exceed certain values and should not interfere.

However, the draft decision was never adopted. Ampelonsky expressed hope that the document will be approved by the end of this year.

Recall that devices that suppress the cellular signal have been used during the exam since 2011. Typically, regional government examination boards “recommend” school principals to purchase and use such devices. As Kommersant reported, this year the regional department of Roskomnadzor in the Tver region fined several schools for using jammers.

The unit installed a mobile phone jammer, and nearby residents’ mobile phones were all’dumb’

Is the signal bad if the mobile phone fails to get out? Not necessarily! Recently, the reporter received reports from some citizens that the mobile phone signal was clearly full, but they couldn’t make calls. They complained to the operator, but the operator said that the network signal was OK. Later, I learned that it turned out that nearby units have installed mobile phone signal jammer for quiet or confidential purposes. As long as the jammers work, the normal communication of residents within one or two kilometers of the neighborhood will also be affected.

desktop signal blocker

After investigating, the reporter found that mobile phone jammers are being used privately by units or individuals. However, in accordance with relevant regulations, the production, sale and installation of mobile phone jammers must be approved by relevant departments; the management department stated that it will strictly investigate and deal with private production, sales and installation of jammers.

User complaint: mobile phone signal is full but unable to dial out

Mr. Fang, who lives in a city in the Pearl River Delta, and his neighbors recently discovered that the mobile phone communication near his home is always not smooth. A cell phone that clearly shows full signal is often unable to dial out near home. Mr. Fang reported to the local mobile operator many times, but the operator replied that the network was OK after many tests. Later, it was finally discovered that a gas station near Mr. Fang’s home had installed a mobile phone jammer for safety reasons. As long as the jammer works, mobile phones within a range of one or two kilometers will be interfered.

The reporter found out that many government agencies, movie theaters, concert halls, gas stations and other units in China have installed cell phone jammers for confidentiality, security or quietness. In the province, second- and third-tier cities in eastern and northern Guangdong are more common, and Guangzhou and Shenzhen are also used occasionally. A person in charge of the theater said that although the audience was reminded to adjust the mobile phone to vibrate before each performance, the effect was minimal, and the installation of a mobile phone jammer solved these problems.

According to the user’s “good wishes”, mobile phone jammers only cause interference to the downlink mobile phone signals within the range of the use unit; but in fact, because many mobile phone jammers have excessive working power and interfere with mobile phone signals in all frequency bands, they not only The user unit itself has also had a serious impact on the normal mobile phone communication of nearby residents, turning their mobile phones into intermittent “dumb”.

According to industry insiders, the working principle of a mobile phone jammer is to cancel out the electromagnetic waves of the mobile phone by emitting radio waves of the same frequency, so that the connection between the mobile phone and the base station is cut off and cannot be used. However, the performance of the mobile phone signal may be full. In this way, users in the same area at the same time find that the signal is full but cannot dial out and dial more desperately, which can easily cause the signal of the operator’s base station to be blocked, or even paralyzed due to overwhelming burden. .

Insiders: the use of mobile phone jammers must be approved

An industry insider told reporters that most of the mobile jammers sold through online channels and in various communication cities do not have the legal procedures for production and sales, and most of the units or individuals who buy mobile jammers also use them. I don’t know that the use of mobile phone jammers requires approval. The radio management departments of various localities stated that they have noticed that many units have produced and installed mobile phone jammers without authorization, saying that their actions violated the above-mentioned relevant regulations. Be severely investigated.

The man set up a jammer to interfere with the aircraft GPS signal? The truth is…

GPS navigation signal is an important technical guarantee for aircraft flight safety. The flight crew of a civil airliner that landed at Liuzhou Airport not long ago reported that the aircraft was about 8 kilometers above the runway when it was descending and preparing to land. GPS signals began to be interfered by radio until the distance About 4 kilometers above the runway, the GPS interference signal disappeared, and the length of time the passenger aircraft was interfered on different flights was different. The shortest time for the passenger aircraft GPS to be interfered was 60 seconds, and the longest time was 125 seconds.

The reporter learned from the Liuzhou Radio Monitoring Center that recently, the center used technical means to jointly enforce the law with relevant departments. This case of civil aviation passenger aircraft GPS interference was seized and handled, eliminating potential safety hazards.

It is understood that on June 28, Liuzhou Airport submitted a radio interference complaint form to Liuzhou Radio Monitoring Center: The GPS signal was severely interfered by the GPS signal while the civil airliner was preparing to land on the runway of Liuzhou Airport recently, resulting in loss of GPS signal and interference. The worst airliner lost GPS signal for up to two minutes. The GPS signal was interfered with and affected the approach and landing of the aircraft. Some flight crews adopted the termination of the RNP approach procedure and used visual control of the aircraft to land, which seriously affected the approach and landing of the civil aviation aircraft and brought security risks to flight safety.

After receiving the complaint, the Liuzhou Radio Monitoring Center dispatched monitoring personnel and dispatched mobile monitoring vehicles to carry out carpet radio monitoring and interference investigations on the area under the GPS interference route. It was found that the source of the interference was set by the Liuzhou Power Supply Bureau on Ruilong Road. A GPS signal jammer in a second-hand car warehouse next to the Fort Substation. After questioning, the owner of the car warehouse confessed that the jammer was purchased from Taobao and it was used to shield the GPS signals of cars in the warehouse to prevent vehicle positioning information from being discovered.

desktop mobile phone blocker

On July 21, Liuzhou Radio Monitoring Center, Municipal Public Security Bureau Airport Branch, and Liuzhou Airport launched a joint operation to investigate and deal with the illegally installed GPS signal jammer in the warehouse. The staff of Liuzhou Radio Monitoring Center and the Public Security Bureau conducted a preliminary inquiry and investigation of the warehouse owner. After that, the public security police seized the GPS signal jammer according to law and brought the warehouse owner back to the Public Security Bureau for further investigation.

At this point, the GPS signals of all civil aviation aircraft that landed at Liuzhou Airport have returned to normal, and the radio signals that interfered with the GPS positioning of the civil aviation aircraft have completely disappeared, and the hidden dangers affecting aviation safety have been eliminated.

Contraband in prison: cell phone

Another way for prisoners to evade prison wiretapping is to obtain their own mobile phones. The prison authorities found that prison inmates can easily get their previous mobile phones (which can be activated with a charger). One tip came from the mother of a prisoner who complained in a jail guard at a Texas state jail that her son’s cell phone was not well received.

In addition to known prisoners committing crimes by telephone, the accessibility of mobile phones has become a serious problem in prisons. When members of the prison have mobile phones, gangs can organize themselves more easily. For example, it is reported that in 2006, gang leaders imprisoned in Brazil used their mobile phones to plot a large-scale simultaneous riot, with the purpose of proving their influence and even being locked up in prison. The group caused an uprising in more than 70 prisons. At the same time, members outside the prison caused riots and caused serious damage to public buses and police stations. Gangs have also surpassed American prison cells, where gang leaders can exercise power from inside the prison walls and even order the killing of gangs.

So, how do prisoners use mobile phones? Obviously, it is well known that visitors and corrupt prison guards provide these calls to prisoners. To help eliminate this phenomenon, some states try to combat it by making the consequences more serious. The court allowed penalties for people who were discovered with a mobile phone, because these conversations cannot be monitored and are therefore a security threat. Several states have criminalized the possession of mobile phones by prisoners, while others hope to increase this crime to a felony level.

Desktop high-power jammer

Unfortunately, for prisons, cell phone signal jammer (interfering with radio waves to prevent cell phone communication) from the “prison jamming” system is not a viable option-at least in the United States, because cell phone jamming devices are illegal under property laws. In addition, even if the prison obtains permission to block cell phone signals, jammers may also interrupt the prison’s radio signals. Despite these concerns, prisons in other countries (such as England) have also implemented jammers due to the widespread use of mobile phones.

How to make your own cell phone signal blocker

Cell phone signal jammer is installed in quiet areas, such as schools or universities, but… how exactly does this instrument block cell phones? These locking instruments prevent mobile devices from receiving signals from base stations. While it may sound like a complicated process, making your own phone blocker isn’t that difficult. However, you should know that in many countries (including the United States) they are illegal and subject to large federal fines, in addition to criminal prosecution. Who knows what could interfere …

phone jammers

1. Understand the principles of operation. This cellular signal blocker operates with the GSM800 frequency, since most mobile phones use it to operate. The VCO selected is a sweeping oscillator, which is very effective but can be difficult to build for beginners who do not have good RF testing equipment.
As a noise source you can use a 45MHZ clock oscillator, which is the local oscillator port located on the mini-circuit mixer. There is also an impedance matching network for the local oscillator signal to pass through. It is used to match the impedances of the oscillators and the mixer port.
The RF input (which is the mixer port) connects to the first 800MHz cell antenna, and the RF output is sent to the mini-circuit amplifier. This amplifier increases the output power by 15-16 dbm. Then the amplified signal is sent to the second antenna of the cell phone.

2. Consider how it works. All cell phones using GSM800 always separate the transmitted and received frequencies at 45MHz. So when the mobile phone tries to call, it is blocked by its own signal coming back to you! Isn’t it cool? So when the chatter of the phone irritates you, turn on the blocker so that the criminal hears his own voice on his cell phone. By the way, you can also use this cell phone signal blocker to block any cell-based tracking system that uses your GPS to track and record the movements of your car. And you can probably block improvised explosive devices that are detonated using cell phones. The mixer that is used is designed to work up to 600 MHz, but in this case it works very well. The RF amplifier does its job quite well even though it consumes additional power.

3 Use an old aluminum box as a frame for the jammer and some old UHF connectors from a Motorola cell phone for input and output.

4 Connect the RF connectors to the circuit.

5 Use a nine-volt battery and a voltage regulator to power all components. Place the battery inside and separate it from the rest of the components using foam rubber.
Flip the on / off switch at the top.

6 Screw the input and output antennas (also from an old Motorola cell phone) to the UHF connectors.

7 Your cell phone blocker is ready. Enjoy it!

Blockage with jammers

A jamming transmitter sends a random signal (noise or pulses) with the greatest possible strength at a certain frequency and thus superimposes the original transmission. If jammers are used specifically, they are referred to as strategic jammer. These devices are also known as jammers and the process is known as noise jamming.

cheap signal jammers

Jammers are available for various radio protocols such as Bluetooth, WiFi, GSM, UMTS, LTE and GPS. Whereby the specific frequency of the radio protocols is disturbed. There are very simple and small devices that can only interfere with radio signals within a limited radius. For example, there is a small adapter for the car cigarette lighter with the function of interfering with the GPS signal. Portable devices with an integrated battery have a range of up to 20 meters under optimal conditions, depending on the version. Usually they can interfere with the signals in a room. Powerful stationary devices can have a range of up to 80 meters.

The use of jammers is illegal in Germany. They are primarily used by investigative authorities and the military services. Some of them are used in prisons to prevent illegal communication from prisoners. The challenge here is that no signals from outside are blocked, for example the cell phone signal to call the emergency call. Abroad, jammers are sometimes used in cinemas and theaters so that the events are not interrupted by a cell phone signal. Another use is, for example, the blocking of control signals from drones.

If such a jamming transmitter is used by attackers, it can be used, for example, to block the radio connections of surveillance cameras or window sensors of alarm systems. Therefore, interrupted connections must always be equated with an alarm. In addition, jammers can be detected by continuously testing a radio connection between two components with a cable connection. If the connection is interrupted, a jammer is active. Alternatively, but also more difficult to solve technically, the signal level, the strength of the radio signals, can be tested. If a new strong source is detected here, it could be a jamming transmitter.

Whether the signal shielding device can shield all communication signals

Nowadays, the emergence of shielding device has solved many hidden dangers of disrupting the order in the examination room, so that candidates can take the exam in a fair environment. The principle of this kind of test signal jammer is actually to block the communication signal of the mobile phone by isolating the electronic signal, which can prevent the phenomenon of using the mobile phone to cheat.

smartphone signal blocker

Generally speaking, the effective range is within a radius of 0 to 30 meters. Generally, a low-power test signal jammer is enough to cover an entire classroom, which meets the needs of the test room for shielding signals, and is especially suitable for schools to purchase signals for the test room. shield.

Can the test signal jammer block all communication signals? Speaking of it, many people are unfamiliar with test signal jammers. In fact, it has been widely used in the college entrance examination examination room. In the college entrance examination last year, many examination rooms installed this kind of equipment and received it. Many good responses have been proven to have a good effect on preventing electronic signal cheating. Starting this year, it has been vigorously promoted to allow more examination rooms to install shields.

DJI launches drone self-interception system

The recent frequent occurrence of drone accidents shows that drones as a consumer-grade technology product have continued to gain popularity. At the same time, the level of safety of drones is also increasing.

he Verge reported that the famous Chinese drone manufacturer DJI launched a new self-intercepting software system “Geospatial Environment Online” (Geospatial Environment Online, GEO) this week, which can prevent DJI drones from flying in No-fly zone.

uav drone blocker

The GEO system allows users to know where drones will be restricted, whether it is due to regulatory requirements or safety issues. This is DJI’s innovative approach to respond to the Federal Aviation Administration (FAA), which has been calling for more rules for drone flight over the past year.

According to The Verge, the drone jammer can prevent DJI UAV systems from flying in no-fly zones such as airports and Washington, D.C., and can also let users know which airspaces are temporarily restricted from flying, such as areas close to forest fires or major sports events. Sensitive areas around prisons and power plants are also restricted in the system.

However, users of DJI drones can still temporarily exit the GEO system and unlock some flight restrictions. However, if an accident occurs, the user will be checked by the regulatory authorities. Users who want to temporarily unlock must have a DJI-certified account and have registered credit card, debit card or mobile phone number information. If the drone is found flying in an unauthorized airspace, the supervisory authority can find the person in charge. However, drone users cannot close all flight restrictions, and areas such as Washington, DC are still completely banned from flying.