Everyone knows that mobile phone signals will be blocked during the college entrance examination, so how much do you know about full-band signal jammers? Today I will introduce to you the principles, characteristics, and problems that arise during use of full-band signal jammers.

Introduction to full-band jammer

The full-band signal jammer effectively blocks CDMA (China Telecom), GSM (China Mobile, China Unicom), SCDMA (Netcom Telecom), DCS (1800MHz), PCS (1900MHz), PHS (Telecom Telecommunications PHS), 3G, 4G, All signals for 5G, WiFi Bluetooth, etc. Mainly used in examination rooms, prisons, courts, conference venues, libraries, theaters, churches, gas stations, oil depots, gas stations, hospitals and other places that require confidentiality, quietness, riot prevention, and interference prevention.

Introduction to the principle of full-band jammer

The working principle of the full-band signal jammer is as follows: within a certain frequency range, mobile phones and base stations are connected through radio waves, and data and sound transmission are completed with a certain baud rate and modulation method.

Based on the above communication principle, the full-band jammer scans from the low-end frequency of the forward channel to the high-end at a certain speed during operation. This scanning speed can cause garbled interference in the message signals received by the mobile phone. The mobile phone cannot detect normal data sent from the base station, making it impossible for the mobile phone to establish a connection with the base station. Mobile phones show symptoms such as searching the network, no signal, and no service system.

Characteristics of the emergence of full-band signal jammers

It only blocks mobile phone signals and does not affect the normal operation of other electronic devices.

It only blocks mobile phone signals in the examination room and does not interfere with mobile phones outside the examination room, let alone the base station.

Only the downlink frequency of the transmitting base station is blocked without affecting the uplink frequency.

Green and environmentally friendly, the electromagnetic field intensity is far lower than the national standard and has no impact on the human body.

Easy to operate, just turn on the power and turn on the switch to run automatically

Problems and solutions to full-band jammers

1. Why does the shielding range of the full-band signal jammer differ from what is described in the manual when it is working?Answer:

The shielding range of the full-band jammer is related to the strong electromagnetic field at the shielding site and the distance from the communication station. Generally, the best distance is 300 meters away. The manufacturer tests under normal conditions, so the shielding range will be a little different.

2. Will there be radiation when the full-band signal is shielded, and will it be harmful to the human body?

Answer: Regarding radiation, electronic products of all sizes will have radiation. Any piece of electrical equipment will emit radiation. Just like the mobile phones we usually use, it is inevitable that there will be radiation when placed next to our ears every day. The country has also set a standard for mobile phone radiation, and the radiation produced by our full-band jammer is still much lower than the national standard, and it does not happen every day. It should be placed close to the ears, so it is almost harmless to the human body.