什么是CB通信（What is CB communication）.doc

什么是CB通信（What is CB communication） What is CB communication? With the development of transportation and communication, some countries in order to open to the general public of the common property of radio wave, to carry out public two-way radio communication service, personal communication of the citizen band called CB (Citizen Band).CB used for automobile communication, can provide the highway, traffic guide, to strengthen the contact between each other in the car when driving, the increase of traffic safety. This is a two-way radio communication service that is not subject to qualification restrictions. In accordance with the circumstances of the country, each country shall allocate appropriate frequencies for citizens to communicate with. The case of Japan: the country since the beginning of June 1961 to the 8 channel 26MHz27MHz band as the special public communication channel, at the same time the antenna output power is below 0.5W, Taiwan people as long as the purchase of radio transmitter after check qualified, and apply to the relevant administrative departments, you can get CB radio station license radio communication. The public radio stations are very popular because they are easy to use and can be used by all citizens. By December 1982, 260 thousand nationwide civilian radio bands had been approved nationwide. Because the civil frequency band radio station only allocates 8 channel frequencies, it is easy to generate mixed station interference in the city. Therefore, some radio users without permission to increase its transmitter emission power transformation, or illegal use has not been approved by the channel, thus interfering with the radio, television and other social problems caused by wireless communication. In addition to the government to take tough measures to combat illegal radio station, and in December 1982 approved the establishment of the individual (Personal) radio, as a solution to a new personal communication means of civil public radio fre