When I was young,mini handheld walkie talkies were not so familiar to me. And i remember that walkie talkies were seen in the movie and the police often used them to talk. But nowadays,with the rapid development of economy and technology,walkie talkies are seen here and there. Moreover,it become a part of some people. Therefore,what is a walk talkie? Actually,it is a handheld and portable radio communication device,which can be used to connect between a transmitter and one or more receivers. Many people feel that they are similar to a mobile phone. Actually,they are not. Because they are battery powered and do not require a network signal to work. More details are being discussed.
Walkie talkies work on a half duplex channel. This means that while there can be only one transmitter sending signals, one or more receivers can listen to it at the same time. A typical walkie talkie contains a small portable body with an antenna to receive signals, a speaker to hear the voice signal and a microphone to speak. They are identified by the push-to-talk button which needs to be pressed every time a person needs to speak and released to hear from the other side.Based on the requirement, they also come with additional features to help the user.
All walked talkies work on a pre defined frequency bandwidth. This can be a free range allowed by the government or paid channels (around 350 MHZ). This gives the user a lot of options for communication. Few channels can be dedicatedly used for a single receiver, making it private, while few channels can be grouped based into different units.
Then,how does it work? A user who wants to communicate first presses the push-to-talk button. He then speaks through the microphone. The analog voice signal is superimposed onto a carrier wave. This radio signal is now transmitted across the specific channel. The receiver's antenna captures the signal. The carrier wave is now separated from the actual analog signal. The receiver's push-to-talk button is released. The receiver can hear the voice signal through the speaker. Every time a transmitter needs to say the word.
After knowing the working principle of the walkie talkies well,would you like a portable walkie talkie? These days,they are being used in a variety of fields because of its low price and convenience. Besides,for eople living in large houses,walkie talkies can ensure easier communication between its residents. For some places where there are no network signal,walkie talkies are ideal tools for effective communication. More information at chierda.
Related reading:Long Range Walkie Talkies,Vehicle Mounted Mobile Radio Base,Walkie Talkie Long Range Antennas