Principle Introduction and Functional Feature of Cell Phone Jammer ...

Principle Introduction of Cell Phone Jammer

Mobile Communication Principle Introduction

Working principle of the cell phone is as follows: the cell phone works in a certain frequency range and connects with the base station via radio wave. Transmission of data and voice is done with a specific baud rate and modulation system.

Principle Introduction of Cell Phone Jammer

Due to this kind of communication principle, the cell phone jammer scans the forward channel from low frequency to high frequency at a certain speed during the working process. The scanning speed can make unreadable code interference when the cell phone receives the message signal. The cell phone cannot detect the normal data sent from the base station and it cannot build up connection with the base station. The cell phone will appear situations of net searching, no-signal, no-service system and so on.

Functional Feature of Cell Phone Jammer

The Cellular Phone Jammer can effectively shield all the cell phone signal, including CDMA (China Telecom), GSM (China Mobile, China Unicom), SCDMA, DCS (1800MHz), PCS (1900MHz), PHS (Telecom PAS) and 3G. It is mainly applicable to such secret and quiet places which require to be explosion-proof and tamper-proof, including the examination room, prison, court, meeting room, library, theater, church, petrol station, oil depot, gas station, hospital and so on.

Only shield cell phone signal but don?t influence other electronic equipments.

Only shield cell phone signal in the examination room but don?t interfere with the mobile phone jammer outside the examination room and base station.

Only shield downward frequency of base station but don?t influence upward frequency.

Green and environment-friendly; electromagnetic field strength is far lower than the national standard and no harm to the human health.

Easy to operate and automatically run after collectively installing antenna and switching on the power.

Industrial control power supply, completely stainless body radiating and ultra-long-time continuous working.

Slow-starting circuit design and firing when starting can be effectively avoided.

Select Hitachi integrated circuit of high performance, 902M VCO and surface mounted devices; adopt imported automatic surface mount system and reflow oven machining, stream line production; stable quality and performance with repair rate not more than 2%.

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Source: http://troptiontrading.com/2011/08/25/principle-introduction-and-functional-feature-of-cell-phone-jammer/

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