The Relationship of Cellular Phones and Signal Jammer

Posted on 9th Sep 2015 @ 10:11 AM

What is the relationship between cellular phones and signal jammer?Let us learn something about that.Signal jammer overpower the cellular phone by transmitting a signal on the same frequency and at a high enough power that the two signals collide and cancel each other out.Cellular phone will add power it they experience low level interference.Meanwhile,the signal jammer needs to recognize and match the power increase from the phone.Cellular phone are full-duplex devices,two separate frequencies for talking and listening simultaneously.Signal jammer may block only one of the frequencies used by cellular phones.So that is only one of the frequencies is received by phone,and tricked into thinking no service.

For jamming a cellular phones ,signal jammer broadcasts on the correct frequencies.Cellular phones have different procession signals,but all phone networks use radio signal that can be interrupted.Jammers can broadcast on any frequency and effective against AMPS,CDMA,TDMA,GSM,PCS,DCS,iDEN and Nestel systems.Old-fashioned analog mobile phones and today’s digital devices are equally susceptible to jamming.

Hills and walls of buildings may block the jamming signal,so the actual rang of the jammer depends on power and local environment.Low powered signal jammer can block calls in a range of about 9 meters.Higher powered units create a cell-free zone as larger as football filed.Units used by law enforcement can be up to 1.6 kilometers..For more kinds of jammers ,such as ,Remote Control jammers,GPS jammers,WIFI jammers,Bluetooth Jammers,Wireless Video Jammers/Audio Jammer,UHF/VHF Jammers, please visit www.jammerfromchina.com .