Wide range signal jammer applications

The operation of jammers should be the responsibility of the concerned vendor to avoid any local tampering at the examination centre. The jammers effectively disable cellular phones. They transmit on the same radio frequencies as mobile phones, thus disrupting the communication between the phone and the mobile phone base station in the tower.

That’s why the US needs “penetrating” 4G jammer, Bacon said: stealth aircraft that are harder – though hardly impossible – to target and which can slip into enemy airspace to conduct electronic warfare at shorter ranges. GPS denial is a becoming a huge issue for American military planners. Peer states, especially Russia, are already putting GPS spoofing and jamming tactics to work during various training events near their own borders. We have discussed this situation in great depth before, and I would suggest you read this article to understand just how deeply the loss of reliable global positioning system data can mean for the U.S. and its allies during a time of war, as well as what is being done to overcome such a monumental hurdle.

Though mobile phones have been banned in exam halls, a final year MBBS student of a private college had managed to cheat in a recently held exam through Bluetooth device and a microphone. “We have installed jammers in four examination halls for preventing cheating during exams. Instructions have also been passed to the invigilators to keep strict vigil on movement of students and check suspects thoroughly.” the dean said.

Such cell phone jammer transmit radio signals in the 800 MHz frequency band, which is used as the mainstream carrier frequency band for NTT DoCoMo’s and KDDI’s au phones. Products targeting other frequency bands are also available.

In June, following the decision from the Union Public Service Commission (UPSC), the MPSC too had banned cellphones at all centres. However, a group of students, which had been demanding various reforms in the exam process, wrote to the Chief Minister’s Office and the MPSC about how many candidates were still managing to sneak in cellphones, using various tactics. Sunil Awatade, deputy secretary with the MPSC, said, “The decision has been taken that in the future, jammers will be installed to put a check on the use of cellphones and related electronic devices. Considering the number of candidates appearing for the preliminary examinations, which is lakhs, it would be impossible to install jammers at all centres.