This XP time setting feature can be disabled. In the control panel, open "Administrative Tools", then "Services". Find and open the "Windows Time" service. Here you can stop it (temporary) and disable it (permanent).
Another option is to use the "Network Time Protocol" service as a replacement to the "Windows Time" service. It is a free download that requires some confusing setup to get working properly, but it seems to do a much better job at keeping all the networked computers accurately synchronized without making any big changes to the computer time. (it slowly shifts the time to keep synchronization rather than making periodic 'step' changes) It also seems far more accurate (should easily keep microsecond synchronization). Hope this is useful! John Howard, Test Engineer Sperry Marine, A Northrop Grumman Company 1070 Seminole Trail Charlottesville, VA 22901 (434) 974-2296 >>> Lewis Drake 02/19/04 08:51AM >>> Our SCADA Tool Kit has a feature that continually monitors the computer time clock to detect any gross changes. This is done because the data compression and history logging programs were written to work with monotonic timestamps. We started to see unexpected system time advance/retard changes causing problems in the SCADA Tool Kit on our XP based installations. The problem was caused by a new XP feature that periodically updates the system time clock automatically at scheduled times. If you open the Windows XP Time and Date Properties (right click on the computer's time display) you will see a new tab there called "Internet Time". You may adjust the time update schedule or disable updating there. I'm posting this to alert you to a potential to be a problem if you are writing any LabVIEW program that assumes monotonic timestamps. Lewis Drake Process Automation Corporation Belle Mead, NJ 908 359-1011 www.processauto.com
