S-meter | - | A meter or graphical display element giving a visual indication of the strength of the signal being received |
S-Parameters | - | The reflection and transmission coefficients used in impedance matching between RF devices and transmission lines |
SCAN | - | Scanning. Continually sweeping frequencies looking for signals |
Scrambler | - | Scrambler |
Selcall | - | Selective Calling System |
Selectivity | - | The ability of the receiver to select the station it is tuned to, from all the others close to it on the display |
Sensitivity | - | Indicates how weak a signal the receiver will pick up. It is measured in microvolts |
Simplex | - | An operation mode where transmit and receive frequency is same |
SINAD | - | Signal / signal + noise + distortion ratio |
Squelch | - | Squelch (or silencer) is a control found on all CB radio transceivers. This function is used to reduce background noise when there is no communication. It is an adjustment, which must be made precisely and repeated frequently in order to avoid reducing the reception capacities of the radio |
SSB | - | Single Sideband |
SWR | - | Standing Wave Level |