The S meter is a measurement tool often used by radio operators to determine signal strength. While it is a commonly used term, there are several synonyms that can also be used to refer to this instrument. Some of these alternatives include signal strength indicator, signal meter, radio strength meter, and receiver signal meter. Each of these terms has a similar meaning and can be used interchangeably with the S meter. By using these synonyms, radio operators can more accurately describe their equipment and the measurements they take. This can lead to clearer communication and a better understanding of the signals being transmitted and received.