Monitoring unit for optical burst mode signals

A monitoring unit for monitoring optical burst mode signals, the monitoring unit comprising:

• a detector for performing a Q-factor measurement with regard to the optical burst mode signals based on at least one variable amplitude threshold value, at least one fixed amplitude threshold values, at least one variable phase value and at least one fixed phase value, said detector comprising:
• a burst mode amplitude detector for generating a fixed amplitude threshold value for each optical burst mode signal to be included in the measurement,
• a burst mode clock recovery circuit for generating a fixed phase value for each optical burst mode signal to be included in the measurement,
• a burst detector for detecting respective beginnings of the burst mode signals, and
• a control logic for generating the variable amplitude threshold value and the variable phase value for each optical burst mode signal to be included in the measurement.