CB specifications - M to Z.

Modes
Method used to place your voice onto the 27 MHz signal.
Only FM is legal in the UK. AM and SSB are illegal for CB in the UK.

Modulation modes
See modes, above.

Power source
Type and voltage of the supply required to run the radio.
Some radios may state "reversible ground" or "floating chassis". This means that the case of the radio is NOT connected to either positive or negative - it is floating.

RF power attenuator
See low power.

RF power output
The amount of radio frequency power transmitted. UK CBs will usually be set at the maximum allowed.

Selectivity
How well the radio can reject a signal at a set distance from the frequency you are tuned to. Higher dB figures are better.

Sensitivity
How well the receiver picks up weaker signals.
For FM radios, this will be measured as a signal level and how noisy that signal will be. The signal may be shown in dB or microvolts and the noise will usually be shown as a dB level compared to the level of the wanted sound (SINAD or, sometimes NQ).
As long as the two sets being compared use the same measurement (SINAD or NQ) and at the same level (20 or 10dB), then:
If the signal level is in -dB, higher is better. If the signal is in microvolts (µV), lower is better.

Spurious emissions
How much signal the radio is likely to transmit on frequencies outside of the CB band. This is an issue regarding interference to radio and TV services.
The maximum figures for these are set by law, but lower levels are better.

A - D     E - L