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How Do Two-Way Radios Work?

How Do Two-Way Radios Work?

How Do Two-Way Radios Work?

Two-way radios work by using a radio receiver that receives the radio waves and interprets the information that the frequency carries. A tuner is also included in the receiver as it helps sort our different frequency signals. This allows you to receive messages from a particular frequency.

While using the device is simple, the science behind it is far more intricate. Understanding how do two way radios can help you pick out the best one for yourself or your company.

What is a Two-Way Radio?

The term two-way radio is a technology that allows individuals to keep in contact with each other using radio waves. Each user is given a radio unit which sends and receives audio and data sent over the radio waves. A two-way radio system can be as simple as two radios connecting directly to each other, or as complex as an encrypted network that covers an entire country.

In the market for a two way radio? Check out our The best walkie talkies in 2022

Mostly, these two way radios have a Push-to-Talk button that allows the user to transmit his message by pressing on it. Once the button is released, the device only receives messages. Although the half-duplex mode is the most common, some radios do use the full-duplex mode. Such devices employ different frequencies or other frequency-sharing methods to talk and listen at the same time.

Portable two way radios are often called walkie-talkies or can be sometimes be referred to as long-range handheld radios although they tend to only be the models that cover a minimum distance. All in all, with a two-way radio, you can talk to other radios directly and instantly.

How Does A Two Way Radio Work?

The main principle of two-way radios is radio frequency. All communication relies on radio frequencies. When people want to talk to each other, they need to tune their devices to the same frequency. This is often referred to as a ‘channel’.

In simpler words, radio frequency describes the number of oscillations of a radio wave. These waves are electromagnetic forces that contribute to radio communication.

A two-way radio device consists of two major parts: a receiver and a transmitter. These devices consist of a circuit with an antenna. A transmitter sends the radio message over a particular frequency. The antenna helps the transmitter create radio waves.

On the other hand, a radio receiver receives the radio waves and interprets the information that the frequency carries. A tuner is also included in the receiver as it helps sort our different frequency signals. This allows you to receive messages from a particular frequency.

When people want to talk into their microphones, they hold the Push-to-Talk button. By talking into it, their message converts into radio waves. These waves are then carried through a particular frequency. The other set receives these waves almost instantly.

At the receiver, the waves are again converted to electric signals, which the loudspeakers then convert to an audio signal.

Different transmisson types: 

Simplex

  • Direction of commnication is unidirectional 

  • Only the sender can send data

  • least performing form of transmission

  • Examples: Computer to printers, keyboards and monitors

Half Duplex

  • Two directional but only one can be used at a single time
  • The sender can send and receive data but only either at a time
  • Performance is better than Simplex transmissions
  • Examples: Walkie-talkies, Work Stations

Full Duplex

  • Two directional simultaineously, both can be used at the same time
  • The sender can send and receive data simultaneously at the same time
  • This is the best perfoming form of transmission
  • Examples: Telephones

  • Parts of a Two-Way Radio

    To understand the working of a two-way radio even further, it’s important to take a look at its parts. These are:

      • Antenna: Sends and receives messages via radio waves.
      • Loudspeaker: Relays the message to the operator.
      • PTT (Push-to-Talk button): Enables the operator to speak when they push the button.
      • Microphone: Allows you to record your message. A few devices have a separate microphone while others integrate the microphone and the loudspeaker into one element.

If you are Interested in learning more about retevis two-way radio solutions,please email to kam@retevis.com


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