1 Scope
2 References
3 Definitions
4 Abbreviations and acronyms
5 Introduction to Q-factor
6 Requirements of Q-factor measurement
equipment
6.1 Physical interfaces and bit rates
6.2 Accuracy requirements and acceptance tests
6.3 Presentation of results
7
Miscellaneous functions
7.1 Remote control port
7.2 TMN interface
8
Operating conditions
8.1 Environmental conditions
8.2 Behaviour in case of power failure
9
Bibliography
10 Background reading
Annex A – Mathematical procedure for the
Q-factor evaluation with the decision level shifting method
A.1 Preconditions
A.2 Theoretical dependence of the BER on the threshold
A.3 Separation of BER(0) and BER(1)
A.4 Calculation of the results
Appendix I – Q-factor theory
I.1 Q-factor theory
I.2 Approximation of the erfc function
I.3 Inverse erfc(x), erfc–1 (x)
Appendix II – Optical channel performance and
characteristics
II.1 Optical channel performance
II.2 Optical channel characteristics
Appendix III – Imperfections to be considered
under conditions found in practice
III.1 Analogue impairments
III.2 Pattern dependencies
III.3 Receiver characteristics
III.4 Sample phase position
III.5 Effects on the Q-factor
Appendix IV – Implementation
suggestions for QFME
IV.1 Block diagrams
IV.2 Functional description
IV.3 Measurement modes
Appendix V – Additional verification tests
V.1 Receiver pulse response