[time-nuts] Datum/Trimble 9390

Russell Rezaian rrezaian at motorola.com
Wed Mar 25 14:56:24 UTC 2009

Sorry to jump in, but does anyone have any thoughts on whether this 
might also be involved in the odd year rollover issue seen on many 
TrueTime devices?

This is the issue where the work around for the TrueTime clocks is to 
use the F68 command to set the year explicitly to 1996.

 From what I understand that issue is also related to GPS week number 
rollover problems, and all of the clocks I know of that experienced 
the issue are using Trimble GPS receivers...

The issue does not seem to affect all of the True Time clocks, but 
then TrueTime seems to have used a number of different GPS receivers 
and a number of different vintage Trimble units too.

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