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Last Modified: February 7, 2020

Provides an estimate of the precision of the timestamping that the clock uses for the protocol.

This estimate depends on the stability of the hardware clock (e.g., oscillator), as well as any error introduced in the timestamping process. The estimate is a second-order statistic on the variation of the frequency of the hardware clock. Valid values range from 0 to 65535.

The BMCA uses this property in its comparison of clock quality.

For the Protocol of IEEE Std 802.1AS-2011, this property corresponds to the offsetScaledLogVariance attribute, specified in 14.2.5 of IEEE Std 802.1AS-2011, which in turn references 7.6.3 of IEEE Std 1588-2008.

Data type: datatype_icon

Long Name: Interface:Ethernet:Time Sync:Clock Offset Scaled Log Variance

Class: XNET Session

Permissions: Read

Where This Property Is Available:

Desktop OS: Windows

FPGA: Not supported

Web Server: Not supported in VIs that run in a web application

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