Which device is used to measure the power of a radio signal?

The RF wattmeter is specifically designed to measure the power of a radio signal. It provides a direct reading of power levels in watts, which is crucial for ensuring that a transmitter operates within its specified power output range. This measurement is essential for both compliance with regulations and optimizing the performance of the radio equipment.

An oscilloscope primarily visualizes the waveform of electronic signals and does not directly measure power; it can help you see signal characteristics but does not quantify the power. A signal generator, on the other hand, is used to produce radio frequency signals for testing and experimentation, rather than for measuring power levels. A modulation analyzer is intended for assessing modulation characteristics of signals but does not measure signal power directly. Each of these devices serves distinct functions in radio technology, but the RF wattmeter stands out when it comes to measuring the actual power output of a radio signal.