1588 Synchronization Drifts Away with Time when using a 10 Mbps Router with the PXI-6682 - KnowledgeBase - Support

This Document is not yet Rated

1588 Synchronization Drifts Away with Time when using a 10 Mbps Router with the PXI-6682

Primary Software: Driver Software>>NI-Sync
Primary 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 you'll get sudden jumps to a very large number of seconds for one iteration and go back to normal for a few seconds and start over again.

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 Flux Duplex. The following steps walk you through how to change these settings.

Determine the name of network adapter device for the PXI-6682, open Measurement and Automation Explorer and open the Test Panel for the PXI-6682. The network adapter is listed under the 1588 tab
Open your Network Connections from Control Panel and select the correct Network Adapter using the name you found in step one.
Right-click the Network Adapter and select Properties
From the Properties window click on Configure
From the Configuration window, select the Advanced tab and make sure the External PHY property is selected. Change the value to 10Mbps Full Duplex.