Cell Phone Jammer EL ? Miss Articles

Brand: EL; Model: 401;

Covering radius of Cellular Phone Jammer: 20m.

Product function cell phone jammer: it can limit the mobile signal more than 200m away from the transmitting station whose radius is more than 20m. The shielding radius is adjustable.

The cell phone jammer only shields the cell phone signal and it will not influence other electronic equipments with no harm to the human body. It is convenient to be installed and it can work with the plug being inserted. It can save the electric energy with the power of 1W.

Working frequency cell phone jammer: 860-960MHZ1.800-1.990GHZ; working frequency channel: CDMA800?GSM900?DCS1800?PCS1900; control range: radius of 40m or so; switching power supply: DC-AC; converter input voltage: 5V; output voltage: determined as per customer?s requirements; output power: 1W-200MW.

Principle Overview of mobile phone jammer

1. Principle introduction of mobile communication

Working principle of the cell phone is as follows: the cell phone connects with base station through the radio wave with the specific baud rate and modulation mode within the specified frequency range to complete transmission of data and voice.

The mobile communication has the following general standard in the world wide:

1) GSM: specification of aerial interface is as follows:

Parameter, specification 1 (GSM 900), specification 2 (DCS-1800), specification (DCS-1900)

Backward channel frequency: 890~915MHz 1710~1785MHz 1880~1920MHz

Forward channel frequency: 935~960MHz 1800~1880MHz 1950~1990MHz

Rate of modulating data: 270.833kbps 270.833kbps 270.833kbps

Modulation mode: GMSK GMSK GMSK

Channel interval: 200KHz 200KHz 200KHz

Frame length: 4.615ms 4.615ms 4.615ms

Types: cellular TDMA; cellular TDMA; cellular TDMA.

Source: http://www.missnomer.info/cell-phone-jammer-el.html

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