• Oct , 26 2022

Interferometer is the general name of portable frequency interferometer. It includes a pull bar box frequency interferometer, a tow box frequency interferometer, a backpack frequency interferometer, and a handheld frequency interferometer. 1. It uses DDS digital frequency modulation interference technology 2. It can set the frequency range and adjust the power of the tow box signal shield accordin...

• Oct , 26 2022

Graduate and civil service examinations will be held throughout the country, and the vicinity of schools as test points will become a signal-restricted zone. How can a pole-box frequency interferometer be so powerful in an examination room? Now reveal its secrets for you. Do you know how your mobile phone receives signals? The principle is that when the frequency-sweeping signal is received in the...

• Oct , 26 2022

With the development of UAV industry, the number of civil UAV equipment has increased rapidly. It is of great significance to guide the public to use UAVs safely and legally, and to supervise, obtain evidence and enforce the law on violations of UAVs, so as to protect the safety of people's lives and property and maintain normal social life and order. Currently, UAV detection countermeasures can a...

• Oct , 19 2022

In order to ensure the information security of examination venues and protect the personal interests of students, and to eliminate some people using mobile phones to cheat, many schools choose to use network screens to prevent this phenomenon before the examination. So what are the errors in using network shield? When testing the shield effect, the shielding range will be different in different pl...

• Oct , 19 2022

As we all know, mobile phone interferometer consists of many radio frequency modules of different frequencies, and the frequencies between these radio frequency modules and antenna should correspond one to one, so why should they correspond one to one, and if not one to one, what will happen? Theradio frequency module of mobile phone interferometer is divided according to the signal frequency used...

• Oct , 19 2022

In order to further standardize the use of mobile phones in confidential meeting rooms and effectively avoid the occurrence of mobile phone eavesdropping events, mobile phone signal intelligent shielding devices came into being. Although enterprises and institutions are paying more and more attention to the eavesdropping protection of confidential meeting rooms, the rapid development of informatio...

• Oct , 10 2022

In order to further standardize the use of mobile phones in confidential conference rooms and effectively avoid the occurrence of mobile phone eavesdropping events, mobile phone signal interferometer emerged as the times require. Although enterprises and institutions pay more and more attention to the protection of confidential conference rooms against eavesdropping, the reluctant rapid developmen...

• Oct , 10 2022

In order to ensure the smooth performance in the Grand Theater and prevent the sudden ringing of mobile phones and other communication tools from damaging the atmosphere of the performance, many Grand Theaters have now chosen to install signal shields. How should we choose and install the shields in the Grand Theater? The vast majority of large theaters need to install additional shielding devices...

• Oct , 10 2022

Since the advent of intelligent shielding devices, they have always been trusted by examination halls, schools, prisons and other units. The device only interferes with the mobile phone signal, so it will not affect the mobile base station and other electronic devices. Nowadays, many primary and middle school students hold mobile phones one by one. Some are addicted to games, some are addicted to ...