Time Synchronization two PCs having LabVIEW's DSC

[Ravinder]

I have two PCs which have LabVIEW's DSC Run-Time System installed on them. They are connected on the LAN. The approximate distance between the two PCs is about 6 KM, i.e., it passes through many repeaters and network switches. Both fiber optic and normal network cable is used. The LAN speed is 10Mbps.

LVDSC Runtime System has an option of time synchronizing two or more PCs which are registered.
What is the accuracy of time synchronization ?
Does the accuracy fall if the distance between the PCs on the LAN increases, i.e., the LAN speed could be slow at times due to net congestion ?
Does the time synchronization take place to the accuracy of "seconds" or "milli seconds" ?

Thanks

[R Hibbert]

I'm not sure about Labview, but most time synchronisation packages are able to compensate for the delay in transmission. I frequently use Automachron by www.oneguycoding.com to sync PCs together.

Richard

[jdr_ni]

Hi,

The time synchronization service that ships with LabVIEW DSC is accurate to +-10 milliseconds in ideal conditions (two PCs on a LAN located on the same floor of the same building). The time synchronization service will attempt to compensate for any latency between the servers, but some accuracy will be lost. Accuracy should never be worse than +-1 second, and should be much better than that except in very high-latency situations.

Sincerely,
J.D. Robertson
Software Engineer
National Instruments