Federal Network Agency

CB radio



The term "CB radio" was originally coined in the USA and basically means "everyman's radio". CB radio is a private, non-commercial application for transmitting messages (voice and data) between users, the "CB hobbyists", and in which all users have the same rights.

Frequencies were assigned to CB radio on a general basis, they are located in the 27-MHz range (11 metre band). In Germany, 80 channels are available between 26.56 MHz and 27.41 MHz. For voice transmission, basically frequency modulation (FM) but also amplitude modulation (AM) and single sideband modulation (SSB) are used. The maximum effective radiated power (ERP) of a CB transmitter is 4 W for FM, PM and SSB, and 1 W for AM.


Health protection

Stationary CB transmitters generate a maximum permissible output power of 4 W. In most cases non-directional antennas without antenna gain are used as a counterpart to a dipole.

If stationary directional antennas are used, which in view of the transmitter power applied and the horizontal antenna gain, yield an effective radiated power of 10 W (EIRP) or more, the CB users are also obliged to ensure the safety of persons exposed to electromagnetic fields. This means that prior to operation the BNetzA must issue a Site Certificate in accordance with the Ordinance concerning the Controls for the Limitation of Electromagnetic Fields (BEMFV).


Date of modification: 2010.07.14

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