Wednesday, 17 July 2013 19:41

Walkie talkie as a handy tool

Known as the handheld transceiver in more formal language, a walkie talkie is a two way radio transceiver, use of which can be traced back to the Second World War. Nowadays these come in handy at commercial worksites and are also used for public safety sometimes. Very common types of walkie talkies usually resemble a telephone handset, perhaps a little bigger in size with an antenna attached to it on top. It is composed of a “half duplex channel” and a button
known as the “push to talk” (PTT) which starts transmission when switched on. Uses ? Military

The armed forces use handheld radios for a number of purposes. Contemporary units like the AN/PRC-148 Multiband Inter/Intra Team Radio (MBITR) which can communicate numerous bands and modulation schemes and also include encryption capabilities are of great help to the military. ? Toys to children

Low-power version of walkie talkies are also used as children's toys like the Fisher Price Walkie-Talkie for children. This type however does not require any license requirement. ? Personal use

Personal walkie-talkies are usually designed to provide easy access to all available channels within the device's fixed allocation. Most of the personal walkie-talkies that are sold are created for operating in UHF allocations. They are extremely compact, with switches for altering channels and also other settings on the front surface on the radio and an antenna attached to the top. These types usually are made of heavy and colorful bright plastics, although some expensive ones have plastic or metal cases. ? Smart phone apps

Smart phones have emerged very quickly in the present era. Many of the applications in the smart phones are similar to that of a walkie talkie style communication. The major characteristics of these are low latency and asynchronous interaction which has a tower over two ways voice calls because it does not use minutes on a cellular plan.

? Marine and aviation use Apart from all these uses a handheld transceiver is recycled for naval as well as aviation use likely on smaller boats or a small aircraft where budget for attaching a fixed radio cannot be permitted. These units often help in providing speedy access to either emergency or information channels. Components

Various accessories are provided with a walkie talkie: ? Rechargeable batteries ? Drop in rechargers ? Multi-unit rechargers which can charge six units at the same time ? An audio accessory jack ? Speaker microphones clipping near the ears ? Security type earpieces ? Headset or ear buds with a push-to-talk button etc. Recent developments Some cellular telephone networks provide a push-to-talk handset which allows walkie-talkie-like operation without dialing a call each time. However, the cellphone provider must be accessible. Walkie-talkies for public safety, industrial uses or commercial uses now can dynamically allocate radio channels for much better use of limited radio spectrum. So the walkie talkie indeed does come handy for various purposes. Where a phone's earphone is only loud enough to be heard by the user, it’s in built speaker can be heard by the both the user and those who are near to him or her. Hand-held transceivers may be used to interact between two, or to vehicle-mounted or even base stations.

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