The CB is a radio communication system that was created in the United States in the 1950s. It was designed to allow individuals to communicate with each other without having to pass through a professional telecommunications operator. This free frequency band was used mainly by US truckers to break the monotony of long distances and to get help in case of breakdown. This gave rise to a spirit of solidarity that has always characterized this form of communication.

At the beginning, it was mostly used by truck drivers who, over time, created a specific language based on Americanisms, word contractions and coded expressions. The CB was successful in the 70s, when many truck and car drivers adopted this form of communication to exchange information on traffic conditions and on rest areas. It has become popular thanks to its simplicity of use and its low cost, and is used by many people to communicate with each other and to exchange information on various topics.

Over the years, the CB is also increasingly used for rescue and emergency communications, as well as for leisure activities, such as bird watching or hunting. It is also used by professionals from various sectors, such as police officers, firefighters and doctors, to communicate with each other and to exchange important information. The CB remains a popular form of communication for many individuals and professionals around the world. President Electronics is one of the world's leading CB radio manufacturers, recognized for the quality and reliability of its products.

The CB radio is a versatile communication tool that offers many benefits for users. It allows you to receive and send messages free of charge, and allows several people to communicate together on the same channel. This characteristic is at the very basis of the CB user spirit and promotes conviviality and openness to others. Unlike the phone that works in duplex mode, conversations are done in simplex mode, so it is necessary to wait for the end of the message of your correspondent before being able to send your own.

CB radio is a wireless communication system for personal and recreational use. It is composed of a portable transceiver, installed in a vehicle or in a fixed location, which allows to transmit and receive messages on radio frequencies reserved for citizens. In general, CB radios are used to communicate at short distances, usually less than 50 km, but they can reach greater distances depending on the environment, the choice of equipment and its quality. CB radios are particularly popular with truck and RV drivers, who often use them to communicate with each other during long trips. CB radio is also used by people working in emergency and security services, as well as by other professionals who need to remain in contact with their team. By combining the advantages of group communication with portability and ease of use, CB radio is an indispensable tool for people seeking to stay connected in a mobile environment.

The CB Radio is a means of communication accessible to all, without license or professional operator, which offers a wide variety of possibilities of use, from leisure to safety and all this in a user-friendly manner.

CB radio is a versatile communication tool that helps people to connect to each other in different situations. It is used for both business and recreational purposes, offering a range of possibilities from informal conversations with friends to life-saving emergency communications.

It is recognized for its role in improving prevention and safety on roads. Some emergency services, such as the fire department, the Red Cross and other voluntary associations have integrated it into their response process and are constantly monitoring Channel 9, the emergency channel so that they can respond quickly to any call for help. CB radio is also recognized for its role in road safety, helping drivers avoid accidents and traffic jams by sharing real-time information. Channels 27 and 19 are also used, respectively for emergency calls and radio guidance by truck drivers and road professionals. It is often used as a backup means of emergency communication in the event of a telephone or network failure, or where other means of communication are not available.

In short, CB radio is a reliable and accessible tool that allows people to connect with each other, communicate and stay safe in various situations.

The use of a CB radio is no longer subject to any licence or tax. However, it is subject to regulations and standards which vary depending on the country. In general, it is regulated by the government and is limited to certain frequency and emission powers to prevent interference with other radio users and ensure the quality of communication.

At the European level, it is imperative to modulate with a device that meets the essential requirements of the European Directive R & TTE No. 1999 / 5 / EC, according to EN 300433 and/or EN 300135: 4 W PEP 40 channels AM/BLU.

In France, CB radio legislation is defined by Decree No.2000-625 of 5 July, 2000, which provides for the use of the band of frequencies reserved for amateur radio and mobile radio. The transmissions are carried out legally on 40 fixed channels from 26,965 MHz to 27,405 MHz. The use of the CB is authorized without a licence, but CB radio devices must be approved and comply with current standards. CB radio must also be used responsibly and should not be used to transmit messages of a defamatory, racist, violent nature or that affect the dignity of the person. Advertising or commercial messages are also prohibited. Finally, it is recommended to respect the courtesy rules and not monopolize the channel or disrupt communications of other users.

It is therefore important to learn about the rules and regulations in force in each country before using this communication device and to respect these rules to ensure the safe and responsible use of the CB.

The CB radio channels are radio frequencies reserved for the use of the CB. In France, the CB radio frequency band is located between 26.965 MHz and 27.405 MHz, as in the United States and other countries. It is divided into 40 channels spaced 10kHz from each other, covering the entire frequency band allocated to the CB.

The CB channels are numbered from 1 to 40. It is important to select the appropriate channel for your communication with a CB radio, so as not to interfere with other users.

The CB channels in France are distributed as follows:

In April 1996, Albert Bertrana, Technical Director of the President Group, presented exclusively to the specialized press an automatic squelch adjustment called ''Automatic Squelch Control'' (ASC). The Automatic Squelch Control (ASC) is an automatic Squelch level setting device based on the quality of the signal received, thus eliminating background noise.

The Squelch (or silencer) is a feature that can be found on all CB radio transceivers. This function virtually eliminates all background noise in the absence of communication. Indeed, the level of radio background noise is not constant and varies depending on time and location. This is a setting that needs to be done with precision and repeated frequently, so as not to diminish the reception capacity of the station.

The ASC therefore conducts a permanent evaluation of the received signal and the existing noise, and it is the signal/noise report obtained that determines the receiver's opening or its standby. If the signal received is low and there is a lot of background noise, the ASC increases the level to cut the noise and improve the clarity of the transmission. If the signal is strong and there is little background noise, the ASC lowers the level to allow the signal to pass and make the transmission audible.

This device, which uses CMS and microelectronics, is present on all CB radios. It avoids manual settings and constant noise level checks, but also improves reception quality. The CB Radio, a safety feature in vehicles, now offers enhanced quality. Drivers no longer have to make adjustments or noise levels checks, as the ASC takes care of all this for them. The ASC thus facilitates the understanding of the messages transmitted. This can be particularly useful in situations where there is a lot of background noise and where it is important to be able to communicate clearly and accurately.