Signal analysis method and signal analysis module

A signal analysis apparatus for recovering a clock signal from an input signal, said signal analysis apparatus comprising:

• an input being configured to receive an input signal;
• a threshold circuit configured to determine transition times of said input signal, wherein said input signal respectively crosses one of several predetermined amplitude thresholds at said transition times;
• a transformation circuit configured to transform said transition times into one reference symbol period, thereby obtaining transformed transition times, and
• a clock recovery circuit configured to determine said clock signal based on said transformed transition times,
• a decoder circuit configured to decode said input signal based on said clock signal, thereby obtaining a decoded input signal, and
• a second threshold circuit configured to determine transition times corresponding to a common symbol transition based on said decoded input signal.