A walkie talkie is also known as a small hand held personal Communication device, usually used by Army, police, and security personnel to transmit voice and data messages over short to medium distances. The basic form of this device consists of a simple push button which is inserted in between the hands. This button controls the device, which then operates by emitting a transmission. In this way, the user can speak to other persons sitting in a different location by simply pushing the “talkie talkies” buttons.
This type of devices are used to both send and receive information, usually in the form of voice messages. Usually these walkie talkie systems have a single transmitter with one or two channels, which can easily be tuned by the user in complete tune to the frequency being used by his or her destination. A number of such systems are available today, using either a two way radio or a half-duplex system. In addition, they can also work on a frequency independent basis, allowing them to operate on any common carrier.
The basic function of a walkie talkie is simple, but in recent years new advances have made possible their use in places where communication is critical, like ships, trucks, aircraft, and power lines. In these applications, the frequency used is again dependent upon the use of the particular application and the nature of the work being done. The two way walkie talkie is a perfect example of this, since its operation requires constant tuning to an exact (i.e. half-duplex) frequency.
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