Two Way Radio Transmissions
A 2-way radio is an air-conditioning radio which can both receive and transmit radio waves, unlike a conventional broadcast receiver that only receives radio signals. Basically, it is an air-transmitter, a receiver and transmitter in a single unit, generally used for two-way voice communication by other wireless users with like radios. These types of radios are used mainly for personal communication, while other applications include police communication, military communications, emergency communications used by disaster rescue teams. The range of the radios is generally between forty to eight miles.
The basic architecture of a typical 2-way radio consists of a transmitter, which are usually a small circuit board, and an antenna, which pick up and transmit signals. In some designs, the transmitter is a simplex transmitter with no separate antenna. A VHF or “General wireless fax” transmitter would be a good example of this type of radio. On the other hand, the VHF repeater is a slightly modified VHF single band repeater, which allows transmission of two frequencies at the same time. The advantage of using the VHF repeater is that it does not require any RF interference, as long as you use a licensed amateur radio operator.
Most 2-way radios are shipped with a license, which is necessary to operate the device. These licenses are valid in most areas, except in New York, where it is not required. To operate a 2-way radio, you must acquire a separate license for each geographic area in which you intend to use it. These licenses are issued by the FCC, and the procedure for obtaining one is basically the same for most other locations.
To operate your 2-way radio effectively, you must connect it to a receiver and a base station. Once connected, the station will send a radio signal out to the rest of the world using an antenna. The antenna receives the signal, converts it to an electric signal, and sends it out using the transmitters, which is again, powered by the station. To receive your radio signals, you must connect the transceiver to a receiver, which is usually a handset on a mobile phone or other small portable electronic device.
With the popularity of the two-way radio in recent years has come an increase in devices designed expressly for its operation. Some examples are two-way walkie-talkie radios, handheld devices with preloaded receivers, and even computers with built-in radio receivers. These devices have increased the range of where two-way communication can occur, making it possible for people to communicate more efficiently and urgently when weather conditions or other factors prevent normal radio transmissions from taking place. Two-way radios can be used for military purposes, surveillance, and even personal communication. They are ideal for those people who love to travel, as they can alert rescuers to your exact location and can help save lives.
When operating these devices, there are many considerations to keep in mind, especially the interference that can occur when communications are in use near obstructions. Some common causes of interference include nearby aircraft, power lines, and even walls. It is very important to stay clear of these obstructions while you are communicating by using this type of radio, as your proximity to them can prevent you from receiving your desired signals.