Receiver sensitivity is determined by measuring the power level of which signal?

Receiver sensitivity is primarily determined by measuring the power level of the minimum discernible signal. This signal represents the weakest signal that a receiver can process and still provide a specific level of performance, typically defined in terms of bit error rate or signal-to-noise ratio.

Measuring the minimum discernible signal allows technicians to assess how well a receiver can pick up weak inputs amidst noise and other interferences. It provides a benchmark for the receiver's ability to operate effectively in real-world scenarios where signals can be substantially attenuated.

This characteristic is essential for understanding and comparing the performance of different receivers, especially in applications where weak signals are expected. Establishing the minimum discernible signal helps ensure that receivers meet the necessary performance criteria for their intended environments and uses.