[time-nuts] Datum 9390 Problems

Thomas Folkers tfolkers at email.arizona.edu
Mon Mar 23 19:10:45 UTC 2009


   On Mar 22, 00:00 UT, both of our Datum 9390 model GPS receivers/time
code generators started producing erroneous day of year and actual year
values.

   Instead of day 81, it said 96 on the front panel, but produced day 196
in the IRIG-B time code.

   They also reported the year as 2007.


   The two units are locate 200 miles apart on a remote mountain location
and are used to control radio telescopes.

   The unit on Kitt Peak. Arizona was purchased in 1998 and has a model
number of:

   9390-6000; Firmware version, I think, of N500/S118/DT101C

   The Unit on Mt. Graham, Arizona was purchesd around 1995 and is model:

   9390-52333; Firmware version: N502/S118/DT300KP.

   Neither unit has ever undergone a firmware update. I'm pretty sure
this may be the root of the problem.


   Can anyone help me here as Symmetricom doesn't seem interested in 
answering my tech support calls.

Thanks,

Tom


-- 

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        _/_/_/_/_/_/  _/_/_/_/_/_/   _/_/_/_/_/_/   Thomas W. Folkers
       _/        _/  _/        _/   _/        _/   Telescope Operations Mgr.
      _/_/_/_/_/_/  _/_/_/_/_/_/   _/        _/   Arizona Radio Observatory
     _/        _/  _/    _/       _/        _/   Steward Observatory
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   _/        _/  _/        _/   _/_/_/_/_/_/   Tucson, Arizona 85721
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