Common types of radio emissions

The specification of walkie-talkie is an important reference for us to know whether it meets our needs. For example, the working mode of walkie-talkies is often marked with words such as F3E or F2D. Do you know what it means? Today let's study together.

The first character indicates the modulation method of the main carrier, and there are 17 different modulation methods as follows.

The first characters of F3E and F3D are both F, so they are FM frequency modulation.

The second character is the signal type of the modulating signal main carrier. There are eleven types of 0~9&X, which are the following types.

The third character represents the type of transmitted information. There are the following nine common ones.