Rec. ITU-T G.8273/Y.1368 corrigendum 1 (10/2020) Framework of phase and time clocks Summary History FOREWORD Table of Contents 1 Scope 2 References 3 Definitions 4 Abbreviations and acronyms 5 Conventions 6 General introduction of phase and time clocks Annex A Testing and measurement of time/phase clocks A.1 Introduction A.1.1 Master port time-stamp error A.1.2 Master port time-transfer error A.2 Grandmaster clocks A.2.1 Grandmaster time stamp error A.3 Boundary clocks A.4 Transparent clocks A.5 Slave clocks A.6 Clocks containing media converters Annex B Phase/time clock equipment specification related measurement methods B.1 Overview B.1.1 General active measurement method B.1.2 General passive measurement method B.2 Telecom grandmaster test B.2.1 Active measurement set-up for testing grandmaster function B.2.2 Passive measurement set-up for testing grandmaster function B.2.3 Active measurement set-up for testing a combined PRTC and grandmaster function B.2.4 Passive measurement set-up for testing a combined PRTC and grandmaster function B.3 Telecom boundary clock test B.3.1 Active measurement set-up for systems with telecom boundary clocks B.3.2 Passive measurement set-up for systems with telecom boundary clocks B.4 Measurement set-up for systems with transparent clocks B.4.1 Active measurement set-up for systems with telecom transparent clocks B.4.2 Passive measurement set-up for systems with telecom transparent clocks B.5 Measurement set-up for systems with telecom time slave clock Appendix I Variable temperature testing methodology Appendix II Variable temperature holdover testing methodology Appendix III Synchronous Ethernet transient testing methodology Appendix IV Measurement of noise transfer using least squares method Bibliography