Sagedusmõõtur

Sagedusmõõtur, often translated as frequency meter, is an electronic instrument used to measure the frequency of a periodic electronic signal. This frequency is the number of cycles or repetitions of a waveform that occur in one second, measured in Hertz (Hz). Sagedusmõõturid are essential tools in various fields, including electronics, telecommunications, audio engineering, and scientific research, for tasks such as calibrating signal generators, tuning oscillators, and diagnosing circuit problems.

There are several types of sagedusmõõturid. Early mechanical frequency meters used resonant circuits to indicate frequency. Modern electronic frequency meters typically employ digital techniques. A common method involves counting the number of signal cycles within a precisely defined time interval. This count is then displayed digitally. Other methods might involve comparing the input frequency to a known reference frequency.

The accuracy of a sagedusmõõtur depends on its internal time base, which is often controlled by a crystal oscillator. Higher quality crystal oscillators provide greater stability and thus higher accuracy. Features of sagedusmõõturid can include a wide frequency range, high resolution, the ability to measure different signal types (e.g., sine waves, square waves), and sometimes additional functions like period measurement or duty cycle analysis. They are indispensable for ensuring signals are operating at their intended frequencies, which is crucial for the proper functioning of many electronic systems.