What is the common method for determining the exact sensitivity specification of a receiver?

Determining the exact sensitivity specification of a receiver is a critical measurement that assesses how well the receiver can detect weak signals. The method of measuring the recovered audio for 12 dB of SINAD (Signal-to-Noise and Distortion ratio) is a widely accepted practice in the field. SINAD is a key indicator of audio quality and performance in communications; a 12 dB SINAD specifies the minimum level of signal quality required for reliable communication.

When performing this measurement, a specific test signal is applied to the receiver, and the performance is evaluated at the point where the received signal's quality meets the required SINAD level. This quantifiable method provides a clear benchmark for sensitivity, differentiating it from subjective or simplistic assessments of a receiver's capabilities.

Other methods such as using an analog meter, checking manufacturer's specifications, or performing a visual inspection do not provide the empirical data necessary to accurately define sensitivity. While manufacturer specifications can provide a general understanding, they may not reflect real-world performance under varying conditions. Similarly, relying on analog measurements or visual inspections lacks the precision and standardized evaluation that the SINAD measurement offers.