What do radio lovers play?

Amateur radio activities have a wide range of contents, including communication practice focusing on improving operational skills, various research experiments aimed at scientific research and innovation, various engineering productions aimed at developing equipment and improving hands-on ability by self-reliance, and friendly exchanges of personnel and letters among enthusiasts from various countries, and so on.

The foundations needed for these activities, such as electronics, physics, communication and computer technology; Foreign languages, geographical knowledge and even fans' personal moral qualities have prompted fans to devote themselves to more learning and improvement. Amateur radio activities mainly include the following contents:

Practice of various communication operations

Amateur radio communication is the synchronous development of world science and technology. In countless times of mutual communication, people use various ways to carry out the operation practice of radio communication, which is called "ON AIR". Feng Chang's communication methods are:

(1) language communication.

According to the different ways of modulating carrier frequency, voice signals can be divided into FM voice, AM voice and SSB voice. The first two types have low transmission efficiency and occupy a wide frequency band, which is generally limited to ultra-short wave and low power. In short-wave (HF) frequency band, the single sideband (SSB) with narrow occupied frequency band is generally adopted. In communication, the two sides directly use language, mainly English plain language and "abbreviation of Q-communication" and abbreviations to talk. Because of its simple operation and complicated equipment, this method is still favored by enthusiasts, especially beginners.

(2) Constant telegraph communication, referred to as CW mode.

This way of communication has a long history. It controls the transmitter to generate short message numbers. (Dot) and long signal "-"(dash) pass through keys, and they are used to represent different characters without combination, thus forming words and sentences. CW mode requires the simplest equipment, occupies a narrow frequency band, has high transmission efficiency, and has a longer communication distance under the same conditions. Moreover, CW language is a real esperanto, and learning CW technology is basically not affected by the education level of amateurs, so although its technology is "ancient", it still plays an important role in amateur communication, and the skilled skills of experienced amateurs are often fully exerted in CW.