Radio frequency counters are essential instruments used to measure the frequency of radio signals. They count the number of signal cycles over a specific period, providing accurate hertz (Hz) frequency readings. These devices are widely used in various applications, including telecommunications, broadcasting, and electronics testing, where precise frequency measurement is crucial for performance and compliance. The functionality of a radio frequency counter typically involves signal input through an antenna or a direct connection to a circuit. Once the signal is received, the counter processes it to determine the frequency, often displaying the results on a digital screen. Advanced models may include features such as time interval measurement and frequency stability analysis.