Introduction to the principle of a walkie-talkie
The wireless walkie-talkie, that is, the radio walkie-talkie, refers to
the radio communication equipment with the working frequency band in
VHF30~300MHZ and UHF300~3000MHZ. The national standard name is ultrashort wave
FM radiotelephone. Wireless walkie-talkies have been used since the 1930s. At
that time, people's handheld wireless walkie-talkies with small power and small
size were called "interphones", and large power and large size could
be installed in cars (ships), etc. Vehicles or fixed-purpose wireless
walkie-talkies are called "radio stations", such as marine platforms,
radio stations, base stations, fixed stations, and transit stations. Two
wireless walkie-talkie classification
Wireless walkie-talkies can be divided into simplex machines and duplex
machines according to different communication working modes. They can be
divided into analog walkie-talkies and digital walkie-talkies according to
different technologies. They can be divided into vehicle-mounted, handheld, and
forward-based according to different ways of use. , fixed type, etc.
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