Title: Timing characteristics of Primary Reference Time Clocks
Summary
Primary Reference Time Clock equipment specification
Provides an accurate time reference into the network, using either 1pps or PTP output
Typical implementation based on GNSS
Jitter/wander based on PRC specification (G.811)
Describes test strategies for evaluating the performance of PRTC implementations
Status
- Current version: 3rd. Edition, November 2018
- Download from: http://www.itu.int/ITU-T/recommendations/rec.aspx?rec=13769
Key Contents
Time Accuracy (clear sky)
- Class A PRTC: within 100ns of UTC (or applicable primary time standard)
- Class B PRTC: within 40ns of UTC (or applicable primary time standard)
Wander:
Functional Model:
Test Strategies:
On this page: