PTP:
The Precision Time Protocol PTPv2 IEEE 1588-2008
PTPv2 / IEEE 1588-2008 Grandmaster Clock
PTP/IEEE1588 is a time synchronization protocol that offers sub-microsecond accuracy over a standard ethernet connection. This level of accuracy can be reached by adding a so-called hardware time stamping unit to the network ports that are used for PTP time synchronization. The time stamping unit captures the exact time when a PTP synchronzation packet is sent or received. These time stamps are taken into account in order to compensate transfer delays introduced by the ethernet network.
The "Grandmaster Clock" is the only one active time source in PTP Networks. In the case of more than one Grandmaster Clock in the network, a "Best Master Clock Algorythm", which is implemented on every PTP IEEE 1588-2008 compliant system, find out the best time source.
All Slave Clocks will select the same source and the other Grandmaster Clocks in this Network enter in passive mode as long as the Synchronization is done by the selected Master Clock.
Where is sub-μs Accuracy required?
- Automation and control systems
- Measurement and automatic test systems
- Power generation, transmission and distribution systems
- Ranging, telemetry and navigation
- Telecommunications