A two-way radio, also called a walkie-talkie, is a radio that can both receive and transmit radio waves, unlike just a simple broadcast receiver which only receives received radio wave content. Basically, it is an electronic transceiver, transmitter and receiver all in one unit, utilized for bidirectional personal voice communication to other wireless users with similar devices. This kind of personal communications device is actually very cheap and easy to use, and comes in handy when you have to communicate with a larger number of people without having to use a traditional broadcast communication device.
One of the most interesting facts about this type of radio is that while they are originally meant for two-ways, today many models can also support a three-way call. If you are thinking of buying this kind of radio, you have to know some of the basic functions that help make this device truly stand out from the rest. These radios work as walkie talkies with their built-in earpieces but have the ability to extend their range.
An interesting thing about these radios is that their main functional group is the Information Counter, which helps in detecting, distinguishing, isolating and monitoring incoming radio signals and distributed them to either an external programmable interface (APCO) or internal MPLS network. In APCO, this device is integrated with the air interface device which allows transmission of voice data to another user and vice versa. However, on the other hand, in MPLS networks such as MMS, there is an extended radio channel used for push-to-talk applications.
Usually, two-way radios are made with the help of some software, which allows the user to monitor, control and receive the incoming signal by scanning channels, amplifiers and modulators. The software can be used to define scan patterns, which allow the device to receive and transmit signals in a clear and consistent manner. This application programming allows the user to create custom patterns which are required for each radio station. The software is also capable of tracking the location of the transmitter by using a triangulation algorithm.
These devices work on a unique triangulation algorithm, which allows them to locate a certain point and emit a signal. For this, the user has to first determine where he/she wants to place the scanner. The next step is to define a maximum and minimum range before determining the frequency and type of frequency to use. The three-way radios are available in various channels and frequencies and each channel has a specific scan pattern, which may allow for specific channels to transmit the incoming signal and avoid interference.
Some advanced two-way radios also offer features such as voice tracking. Voice tracking allows you to know what direction you are heading towards. It may be useful in situations where you need to find your way out from under a pile of clutter. Other options are channel hopping and broadcast filtering, which can greatly increase the chances of your receiving a clearer signal. These scanners can also be connected to an AM/FM radio so that you can receive channels you would otherwise not be able to.