1588 Synchronization Drifts Away with Time when using a 10 Mbps Router with the PXI-6682Primary Software: Driver Software>>NI-SyncPrimary Software Version: 3.0 Primary Software Fixed Version: N/A Secondary Software: N/A Hardware: PXI/CompactPCI>>Platform Modules>>PXI-6682
Problem: I'm doing 1588 synchronization with the PXI-6682, but I've noticed that synchronization gets worse with time (the slave continues to drift away from the master). Looking at the "offset from master" property for the slave, the value will look normal (under 100ns) most of the time, but there will be sudden jumps to a very large number of seconds for one iteration and then go back to normal for a few seconds, only to repeat the process. Solution: This problem happens when using a 10 Mbps router, but can be resolved by setting the external PHY of the PXI-6682 network adapter to 10 Mbps Full Duplex. The following steps walk you through how to change these settings.
Related Links: Developer Zone Tutorial: Introduction to Distributed Clock Synchronization and the IEEE 1588 Precision Time Protocol Attachments:
Report Date: 10/10/2007 Last Updated: 06/01/2009 Document ID: 4E9BS88P |
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