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alexytony

alexytony's blog

  1. How to Solve Wireless Camera WiFi Interference?
  2. How to help bombs overcome GPS jammer?
  3. How long can a wireless wifi jammer generally..
  4. Why does the Military Use Signal Jamming?
  5. How to keep your network environment safe?
  6. Who uses GPS jammers?
  7. What is a GPS Jammer?
  8. The main method of UAV countermeasures
  9. Cell phone signal jammers keep the exam room in..
  10. Cell phone signal jammers are specially prepared..
  11. Cell phone signal jammers are specially prepared..
  12. Cell phone jammers are a well-known means of..
  13. Signal jammers only target specific frequency..
  14. Signal jammers can get out of the way of..
  15. The demand for cell phone jammers is increasing..
  16. Cell phone jammers can protect people from harm
  17. Signal jammers can protect our privacy in all..
  18. Cell phone jammers block some nasty signals
  19. The strength of the mobile phone signal jammer has..
  20. Will signal jammers affect the development of..
  21. The strength of the mobile phone signal jammer has..
  22. Cell Phone Jammer to Get Rid of Unexpected Noise
  23. Different signal jammers help life differently
  24. Cell Phone Jammers Eliminate the Annoyances of..
  25. Cell Phone Jammers Get People's Attention
  26. Cell Phone Jammers Get People's Attention
  27. Cell Phone Jammers Get People's Attention
  28. The types of signal jammers are quite rich
  29. The types of signal jammers are quite rich
  30. The legality of signal jammers depends on the..
  31. The legality of signal jammers depends on the..
  32. Cell phone jammers restrict government officials'..
  33. Will the use of mobile jammers be considered..
  34. Will mobile phone jammers have bad effects on the..
  35. Mobile jammer prevents cheating by sending text..
  36. Mobile jammer prevents cheating by sending text..
  37. Signal jammers generally only shield electronic..
  38. Signal jammers protect network security
  39. Signal jammers protect network security
  40. Mobile phone jammer is harmful to electronic..

The alexytony's blog

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Posts 111 posts

Jammers have considerable advantages over noise jamming systems Apr 30, 2020
imageAs we all know, radar is widely used in modern warfare. Thanks to radar, electronic warfare can be launched. Therefore, radar interference and anti-jamming are the keys to modern electronic warfare. The key to radar interference is the GPS jammer. Therefore, the spoof jammer can adapt its duty cycle to the victim radar duty cycle without using the 100% duty cycle required by the noise jammer. In order to be effective, the power requirement of the deceptive jammer depends on the average power of the radar, not the peak power required by the noise jammer.

https://www.perfectjammer.com/gps-blockers-jammers.html

In addition, since the waveform of the interference signal looks the same as the waveform of the radar, it is regarded as actual feedback. The jamming signal is amplified by the victim's radar receiver, thereby increasing its effectiveness. When designing and constructing self-protecting jamming systems for tactical aircraft entering dense threat environments, the reduced power required for effective deception jamming is particularly important. The spoof blocking system can be smaller and lighter, and can block multiple threats at the same time. These characteristics make deceptive jammers have considerable advantages over noise jamming systems.

https://www.perfectjammer.com/wireless-wifi-bluetooth-jammers.html

Although North Korea is a relatively late country. But with the help of Russia, North Korea gained influence. GPS jammer and other aspects. Russia is currently very good. The US military relies heavily on GPS and may be developing a series of position, navigation and synchronization (PNT) technologies to overcome the loss of GPS in combat. This possibility is increasing today and in the coming years. Some people speculate that this year's exercise clearly envisaged possible conflicts on the Korean peninsula. In recent years, North Korea has frequently issued GPS interference signals.

https://www.perfectjammer.com/

Interference with cruise missiles, how to counter cruise missiles? This is not just a question studied by military experts around the world. This is what a sociologist dedicated to peace has always wanted to know. With the advent of GPS jammers, this question seems to be easy to answer.

Question one of the most difficult challenges facing the creators of world peace. The threat posed by ballistic missiles is well documented. However, the threat posed by cruise missiles may be greater or greater. One of the reasons (if it is not the deciding factor that has caused increasing concern about the proliferation of global cruise missiles) is the development and deployment of satellite navigation systems (such as the United States' Global Positioning System (GPS) and satellite navigation systems). Global Russian navigation system. System (GLONASS). This paper studies the problem of GPS performance in the interference environment. Specifically.

https://www.perfectjammer.com/all-gsm-3g-jammers-blockers.html

Russia seems to be using a special type of drone jammer. In addition to the wide range of interference, the jammer is very cautious. Because the US military does not understand how Russians use cell phone jammers. Therefore, Russia does have more interference equipment than the United States. Samuel Bendett, a research analyst at the Naval Analysis Center, said: "Russia has been using cell phone jammers installed on drones for many years."Drone jammer, many people have heard the name. But how does the device work and what is the principle? Maybe few people know. Therefore, today, we specially invite experts to respond to us.

https://www.perfectjammer.com/drone-signal-jammers.html

To interfere, the jammer transmits RF power (CW + modulation) at the same frequency used by the enemy link or network. The enemy receiver (the "listening" side) receives signals from the jammer and its "partner". The strongest will have the upper hand; if the ability of the jammer is greater than the ability of the "partner", the "listener" will not be able to "understand" the message / data correctly. Alternatively, if the capabilities of the "partner" are greater than the capabilities of the interferer, the "listener" will probably be able to "understand" the message / data correctly, and the communication link between the "partners" will remain uninterrupted. This explanation is a bit superficial, the purpose is to simplify things. However, if we try to "deep" the problem, we can compare the signal levels of the two "links" to get more parameters.

https://www.perfectjammer.com/all-cell-phone-jammers-blockers.html

An example is the SNR (signal-to-noise ratio) that the receiver "sees" at its input. Sometimes, the interference signal arriving at the receiver input may be lower than the communication signal ("partner"), and still dominate. This happens because the receiver usually needs a “margin” between the two input signals to explain one of them (usually the strongest). However, in advanced communication systems, this "margin" is sometimes even negative (which means that the communication signal may be much weaker than the interference signal), and the receiver will always be able to receive the signal, but it takes a long time.

https://www.perfectjammer.com/military-frequency-jammer.html
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Jammer n interferes with the necessary safe frequency Apr 13, 2020
imageIn a short period of time, SMDC trainers can help soldiers identify when their communications equipment is stuck. This skill becomes more and more important under the Army ’s multi-domain combat concept, which envisages that scattered soldiers fighting in a competitive environment will deal with near-threat threats. On the LimeSDR CrowdSupply blog, Ogün Levent published a short article about its "Dronesense" project. Dronsense is a spectrum scanning and GPS jammer system based on LimeSDR. LimeSDR is a 12-bit TX / RX function SDR with a price of $ 299. It can be tuned from 100 kHz to 3.8 GHz with a maximum bandwidth of 61.44 MHz.

https://www.perfectjammer.com/

The drone jammer has three frequencies that can change the direction of the drone. You can select the direction by pressing one of the three frequency buttons. The barrel is equipped with antennas that emit signals that force the drone to return and land, thereby protecting the airspace. The buttstock is similar to the assault rifle of the M203 grenade launcher. It is designed with a center of gravity, which reduces fatigue during use and improves accuracy. In order to obtain more functions, the drone killer is also designed to accept optical sight attachments. Of all the drone jammers we have seen, this is definitely one of the most impressive.

https://www.perfectjammer.com/all-gsm-3g-jammers-blockers.html

Mobile phone jammer laws are different around the world. For example, in the UK and Japan, anyone can own a jammer-as long as it is not used. Dozens of countries including Canada, Mexico, New Zealand, Norway, Turkey and other countries allow police or prison officials to use jammers. Schools in China and India use jammers to stop cheaters. Mexico allows the use of jammers in churches and hospitals. Pakistan allows interference with banks and libraries. Most countries, including the United States, use jammers to prevent bomb attacks on government leaders triggered by cell phones. When President Obama took a walk on Pennsylvania Avenue after taking office, all mobile phones were jammed in the area. The US military uses a jamming mechanism to stop the roadside bomb attacks in Iraq.

https://www.perfectjammer.com/gps-blockers-jammers.html

In recent years, with the rapid development of modern communication technology, the use of high-tech cheating methods in the examination room has emerged in an endless stream. The college entrance examination cheating tools consisted of the original pager, mobile phone, and then the handset to today's mobile phone. The appearance of digital products is used for cheating tools such as rulers, rubber, glasses cases, stationery bags, watches, mineral water bottles, etc. Exams have appeared in various countries. In order to prevent cheating, the authorities effectively prevented and prevented cheating in the inspection room by using mobile phone interceptors, metal detectors, wireless cell phone jammers, and warning suppression equipment.

https://www.perfectjammer.com/all-cell-phone-jammers-blockers.html

Many people do not understand the principle of electromagnetic shielding. Both the metal box and the box are grounded, and it can serve as electromagnetic shielding. Under the guidance of this concept, it is the result of failure. Because electromagnetic shielding does not matter whether the shielding layer is grounded. Only two factors affect the actual effectiveness of protective shielding: one shielding surface must be a continuous conductive surface, while the other conductor cannot directly penetrate the shielding layer. There are many points on the discontinuous conductive shield, the most important is the non-conductive space formed by connecting different parts of the shield. Electromagnetic leakage can occur in non-conductive gaps because fluid may leak from the same location on the container. One way to solve this leakage is to fill the space of the conductive elastic material to eliminate non-conductive points. For the same reason, this filled rubber acts as a fluid container in the space. This conductive filler material is an elastic electromagnetic seal. For example: the key car GPS jammer uses this principle.

https://www.perfectjammer.com/drone-signal-jammers.html

After taking appropriate measures to suppress RF interference to our test laboratory, we tested this attack for ourselves and were able to verify whether it is possible to use the correct equipment. However, we also verified whether SimpliSafe's anti-interference algorithm is effective. It caught our actions, sent an alert to my smartphone, and listed our RF interference in the system's event log.
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Should schools use jammers? Jan 19, 2018
imageShould students use cell phones?
http://www.perfectjammer.com/all-cell-phone-jammers-blockers.html
Recently, students complained: the dormitory of changping middle school (senior middle school) has not been approved by the radio management department to install the cell phone jammer, and the current shield installation project has been completed. Students are calling for the education department to stop such violations in time.
http://www.perfectjammer.com/all-gsm-3g-jammers-blockers.html
The school installed mobile phone signal shield, the dongguan students caused a lot of response, "our school also has this practice, today just know need approval, how do you complain?"

Some students speak cry: "school in order not to let us play with mobile phones, is under heavy book, but now is the information age, a lot of information on the Internet, students can read only a sage book, no matter out of the window? The cell phone signal is blocked, can't surf the Internet, how to do modern?"

Li, deputy director of the dongguan middle school, said the school allows students to use mobile phones, but it is forbidden to use them in the teaching area, in dormitories and at night.

Before we also want to rules prohibit taking your cell phone, but found that can only be false, considering the students do have to contact the needs of the family and Internet access to information, so adopting flexible policy, but it seems the students' self-control ability is weak, many children secretly after lights out at night to play mobile phone, so the school to install blockers in the dormitory, but also to prevent students use mobile phone after lunch break and night lights out."

Mr Li also admitted that this notice is mainly aimed at public places, but it can install in the public places did not make clear a regulation, the school has also apply to the watchdog, by the trust, but no one department can give approval.

"I support the school's approach and very much want the school to take measures to strictly control students' mobile phones." Mr. He, who lives in dongguan, said. The reporter interviewed some middle school, high school student parents to find out, to the school install screen gsm jammer, the parents mostly raise their hands to approve.

Mr. He added, "my son's cell phone is basically used to play games and watch games. On the one hand, it is an influence on learning. How can I concentrate on how to pass the class? On the other hand, children are not able to stay up late at night and play games. Besides, some violent games seriously affect children's physical and mental health. The mobile phone is fierce in tiger!"

Experts said the enrolled students to bring mobile phone in China has become a problem, this is not a problem, in a foreign country for foreign families pay more attention to accompany children, parents in the company will teach the children how to proper use of electronic products, "how many parents can fully with domestic, some parents to accompany children also do not put down the phone, some parents directly throw a person playing mobile phone or watching cartoons."

Desktop drone jammers

http://www.perfectjammer.com/news-cinemas-decide-use-jammer.html

http://forum.perfectjammer.com/discussion/52/how-to-block-gps-signal-in-car
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