Cell jammers

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by harish

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WELCOME TO SEMINAR:

WELCOME TO SEMINAR k . Harish Roll no:1011125

SEMINAR ON CELL PHONE JAMMERS:

SEMINAR ON CELL PHONE JAMMERS

INTRODUCTION:

INTRODUCTION Cell phones are used everywhere in these days. Blocking mobile frequency from 5 to 200 meters radius. Jammer is a device to help you keep away from noise or disturbance of cellular phone calls. Phone Jammer is suitable in executive offices, board meetings, conferences, seminars, libraries, cinemas, religious places, public transport, concert halls, restaurants and educational institutions etc.

JAMMER BASICS:

JAMMER BASICS Disturbing a cell phone is the same jamming. Cell towers divided a city into small areas. A jamming device transmits on the same radio frequencies as the cell phone. It's a called a denial-of-service attack. The jammer denies service of the radio spectrum to the cell-phone users within range of the jamming device .

MOBILE BLOCKER:

MOBILE BLOCKER Features

FEATURES OF CELL PHONE JAMMER:

FEATURES OF CELL PHONE JAMMER show the working power on the shell with green lights. prevent cheating by using cell phone in the examinations keeping you away from the noise or disturbance of unexpected cell phone calls or Sims. class time or meeting time. mini-size medium power . low weight and nice texture and color to block. wireless phone communication links within an effective area .

HOW IT WORKS:

HOW IT WORKS Jamming devices overpower the cell phone by transmitting a signal on the same frequency. Cell phones are full-duplex devices . Less complex devices block only one group of frequencies . The actual range of the jammer depends on its power. Some cell-phone jammers are made to look like actual phones .

HOW TO OPERATE THE CELLPHONE JAMMER:

HOW TO OPERATE THE CELLPHONE JAMMER Install the antennas fully correctly in vertical firstly. Plug the power adaptor into the electricity outlet (110V-240V). Before turn on the power switch, always check if the antennas are installed securely.

There are two types of cell phone jammers currently available:

There are two types of cell phone jammers currently available The first type are usually smaller devices that block the signals coming from cell phone towers to individual cell phones. The second type of cell phone jammer is usually much larger in size and more powerful. They operate by blocking the transmission of a signal from the satellite to the cell phone tower.

CELL-PHONE ALERTERS ARE AVAILABLE:

CELL-PHONE ALERTERS ARE AVAILABLE Indicate the presence of a cell-phone signal. These have been used in hospitals where cell-phone signals could interfere with sensitive medical equipment. When a signal is detected, users are asked to turn off their phones. For a less technical solution, Caudal Partners, a design firm in Chicago, has launched the SHHH, the Society for Hand Held Hushing .

INSIDE A CELL PHONE JAMMER :

INSIDE A CELL PHONE JAMMER Circuitry Voltage-controlled oscillator Noise generator RF amplification Antenna Every jamming device has an antenna to send the signal . Power Supply Smaller jamming devices are battery operated.

CELL PHONE JAMMER DEVICES :

CELL PHONE JAMMER DEVICES 1) HIGH POWERED POCKET SIZED CELL PHONE JAMMER Effective range Up to 20 meters radius, depending on the strength and type of cellular system Input power 4.8V DC Ni MH battery pack Output signal strength 100mW Operation temperature -10 c to +50 c Humidity 5% to 80% Size W 49 x H 29 mm Weight 190gm

2)XT-5000 CELL PHONE JAMMER :

2)XT-5000 CELL PHONE JAMMER Frequency Band 800-964 MHz  890-964 MHz  1.700-2.200 MHz Effective range XT5000 up to 30 meters radius, XT6000 up to 40 meters depending on the strength and type of cellular system Input power In-built Ni MH battery pack Output signal strength XT5000: 900mW,    XT6000: 1,400mW Operation temperature -10 c to +50 c Humidity 5% to 80% Size W 60 x H 30 mm Weight 250gm This is a very high-powered pocket sized cell phone jammer that will disable all cell phones in all countries

PowerPoint Presentation:

3) CXT-CELL PHONE JAMMER (OR)3WATT DIGITAL CELL PHONE JAMMER Frequency Band 860 - 885  925 - 960  1800 - 1990MHz Effective range Up to 40 meters Input power 12v DC Output signal strength 3 watts Operation temperature -10c to +70 c Humidity 5% to 80% Size W 126 x H 44 mm Weight 0.8Kg it will prevent any one in the surrounding area operating mobile phone .

PowerPoint Presentation:

4)HIGH POWERED 32 WATT CELL PHONE JAMMER PERFORMS BRILLIANTLY Frequency Band 860 - 885  925 - 960  1800 - 1990  2100 - 2200MHz. Effective range Up to 120 metres Input power 24 volts DC Output signal strength 32 watts Operation temperature -10 c to +60 c Humidity 5% to 80% Size W 186 x H 53 mm This is an ultrahigh powered cell phone jammer.

THIS IS AN ULTRAHIGH POWERED CELL PHONE JAMMER :

THIS IS AN ULTRAHIGH POWERED CELL PHONE JAMMER

Jamming–to-signal ratio {J/S} :

Jamming–to-signal ratio {J/S} Jamming is successful when the jamming signal denies the usability of the communication transmission. In digital communications, the usability is denied when the error rate of the transmission can not be compensated by error correction. Usually, a successful jamming attack requires that the jammer power is roughly equal to signal power at the receiver(mobile device).

WHERE ARE CELL-PHONE JAMMERS USED? :

WHERE ARE CELL-PHONE JAMMERS USED? Cell phone jamming devices were originally developed for law enforcement and the military to interrupt communications by criminals and terrorists. Country Club Sporting Events (tennis, golf, etc.) Law Enforcement Facilities Military Installations Mobile Phone Prohibited Entries

THE LEGAL ISSUES :

THE LEGAL ISSUES In the United States, United Kingdom, Australia and many other countries, blocking cell-phone services is against the law. In most countries, it is illegal for private citizens to jam cell-phone transmission. India has installed jammers in parliament and some prisons .

ADVANTAGES:

ADVANTAGES Police can block phone calls during a drug raid so suspects cant communicate outside the area. Cell-phone jammers can be used in areas where radio transmissions are dangerous . Cell Phone Jammer Applications Cell phone jamming devices were originally developed for law enforcement and the military to interrupt communications by criminals and terrorists.

DISADVANTAGES:

DISADVANTAGES Please do not take off antennas when the machine is working. Otherwise, it should cause heavy damage to the device and cause the device out of work. It will also void warranty. Install the antennas before switch on the device, otherwise will heavy damage the jammer.

CONCLUSION:

CONCLUSION The increased technology of the cellular phone has made life convenient and easy. However in some situations this convenience becomes a nuisance to other people. Areas such as concert halls, conference rooms and theaters are where this nuisance is felt the most. Cell-phone users don't know they're being jammed. The phones just indicate that there's no service or no signal from the network. The jammer simply interrupts the phone's ability to establish a link with the nearest cell-phone tower.

REFERENCES:

REFERENCES www.spymodex.com www.cellphonejammer.com www.jammers.com

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