Title: Timing characteristics of telecom grandmaster clocks for frequency synchronization
Summary
Packet-Based Equipment Master Clock for Frequency (PEC-M-F)
Takes PRC-quality input and generated PTP output
Based on the G.812 Types I, II or III clocks (SSU clocks)
Specifies frequency accuracy, noise generation, noise tolerance, holdover, testing methods
Status
- Current version: 1st. Edition, November 2016, plus Amendment 1, March 2018
- Download from: http://www.itu.int/ITU-T/recommendations/rec.aspx?rec=13106
Key Contents
- Three types of clocks: Type I (Europe), Types II and III (N. America)
- Performance characteristics based on the equivalent G.812 Types I, II or III:
- Frequency accuracy (free-run)
- Wander generation (but measured through a low-pass filter of 0.1Hz)
- Wander tolerance
- Wander transfer
- Transient response and holdover
- Functional model: