The tinyPFA is a Phase and Frequency Analyzer to very precisely measure small phase and/or frequency differences between two inputs signals.
A typical use case is to measure phase or frequency differences between to 10 MHz clocks.
Measurement results can be display in the screen or send to applications like TimeLab.
Phase measurement accuracy per second measurement time is better then 1e-12.
Frequency measurement accuracy is better then 10 micro Hz.
Wiki with all the documentation