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Cell-phone-jammers-and-their-functions
By David McDaniel
All of us know that a Cell Phone Jammer provides the ultimate solution in any area where communications frequently cause nuisance either by loud incoming call rings or loud telephone conversations. A Cell Phone Jammer is suitable in executive offices, board meetings, conferences, seminars, libraries, cinemas, religious places, public transport, concert halls, restaurants and educational institutions, etc. It's great to be able to call anyone at anytime. Unfortunately, restaurants, movie theaters, concerts, shopping malls and churches all suffer from the spread of cell phones because not all cell-phone users know when to stop talking. Who hasn't seethed through one side of a conversation about an incredibly personal situation as the talker shares intimate details with his friend as well as everyone else in the area?
These devices are very useful as well. Let’s look at some of their functions.
A Mobile Phone Jammer transmits low power radio signals to cut-off communications between cell phone and base-stations. It does not interfere with any communications other than within the defined regulated zone. Most importantly, EMS, Fire, and Police bands are NOT affected by the unit.
Upon activating these, all idle phones will indicate "NO SERVICE". Incoming calls are blocked as if the hand phone is OFF.
When the Cell Phone Jammer is turned off, all cell phones will automatically re-establish communications and provide full service.
A cell phone uses two separate frequencies; one is used for transmitting (talking) and the other for receiving (hearing). The signal originating from one phone is sent to the base station and from where it is relayed to the recipient. When a cell phone comes into the range of an active jammer, the signals originating from the cell phone collide with the signals of the jammer. This effectively cancels out the phone signals, disconnecting linkage between handset and base station. Available models for different systems of phone networks include analog and digital.
There are different types and sizes available depending on their power and coverage range. Most hand held look like
normal cell phones and they use cell phone batteries. Larger jammers can be as big as a briefcase and can be used with a normal power outlet.
Application of cell phone jammers-
Hospitals, medical centers or where medical instruments should not be disturbed by the signal.
# While you are in the Theatres, cinemas, museums, art galleries, etc.
Conference rooms and offices.
# Libraries and schools (stops cheaters from texting answers!).
# Restaurants & high security premises (including prisons) that should be free from phone communication.
You should also know that these jammers have optimum range indoors, and if used outside the range is reduced slightly as the cell phone signal power is more powerful.
USING A JAMMER
Because jammers now come in much smaller sizes, they are very easy to carry around. Portable personal jammers will fit into the palm of your hand or easily slip into your coat pocket. So the next time someone on your commuter bus refuses to shut up, you can just reach into your backpack and turn on a temporary "dead zone" with your jammer. Then get back to some nice peace and quiet.
Electronically speaking, cell-phone jammers are very basic devices. The simplest just have an on/off switch and a light that indicates it's on. More complex devices have switches to activate jamming at different frequencies. Components of a jammer include an antenna, as every jamming device uses an antenna to send the signal. On stronger devices, antennas are external to provide longer range, and may be tuned for individual frequencies
So the next time you want to buy yourself a good cell phone jammer, all you need to do is keep in mind these details of this gadget. Article Source: http://www.upublish.info About the Author:
David McDaniel
For more information on cell phone jammer, visit my website TheSignalJammer.Com
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