This tool uses the signal period as measured on an oscilloscope to calculate its frequency.
F = 1/T
- T is the time period
- F is the frequency
How to find the period of a signal using an Oscilloscope
This useful video will guide you on how to find the period using an older analog oscilloscope. The method is valid for digital scopes. However, newer instruments have automated software tools built in to automatically find the period.