CB specifications A to D.

Antenna impedance
The impedance that the antenna you connect to the CB radio should be. A common standard is 50 Ohms.

Audio power
The maximum amount of power into the speaker, the manufacturer may also state the required speaker impedance.
Any speaker connected must have the same impedance, and must be able to take the power level without being damaged.

Adjacent channel rejection
How well the CB radio can reject a signal on the channel above or below the one you are using.
Typical figures are around 60dB, which is now the legal minimum, although a higher figure is better.

Channels
Usually states how many channels are available on the radio. This may include details of the frequency range covered and how the frequencies are generated.
PLL Synthesized means that the radio creates the frequencies from just one reference crystal, rather than separate crystals being used for each channel.

Conversion system
This is the type of receiver used in the CB, dual conversion superhet is a common standard among CB radios.

Current drain
The amount of electrical current used by the radio. This information is useful when deciding what power supply to get for a mobile radio or what size fuse to fit.

Deviation
How much your transmit frequency is shifted by your outgoing sound. The maximum level is set by law.

Dynamic range
A measure of how well the receiver handles signals of different strengths.
This could be quoted as a minimum and maximum signal, in which case a wider range is better. It could also be quoted as a single dB figure, in which case higher is better.

E - L     M - Z