[time-nuts] Symmetricom TymServe 2100-GPS currently fails with GPS offset

Robert Watzlavick rocket at watzlavick.com
Fri Jan 23 22:55:43 EST 2015

I'm seeing the same thing with my TS-2100 - it is one second behind WWV 
based on the front panel display.   My ET-6000 appears to be in sync.  
What's interesting though is that I have a little applet on my iPhone 
(NetTime) that connects to nist.time.gov and it is also a second behind.


On 01/23/2015 03:36 PM, Esa Heikkinen wrote:
> Hi!
> It seems that there's serious bug in Symmetricom Tymserve 2100 most 
> recent firmware (V4.1). When leap second pending flag was added to GPS 
> transmission (according to data shown by Lady Heather) the Tymserve's 
> time started to be exactly 1 second late from UTC!
> Currently it claims that current UTC offset is 17 seconds, while Lady 
> Heather shows 16 seconds. Also if I compare the NTP time with another 
> NTP servers it is really 1 seconds late.
> Playing with telnet:
> ? utcoffset
> GPS --> UTC Offset = 17
> (And of course there's no way to set this manually)
> However in the utcinfo data the dTLs value received from GPS is 
> correct (16) but it seems that Tymserver firmware uses wrong value 
> dTLsf, which is the future value of UTC offset after leap second event:
> ? utcinfo
> A0:0.0000000 A1:0.0000000 dTLs:16 ToT:61440.0000000 WNt:1829 
> WNLsf:1851 DN:3 dTLsf:17
> It seems that there's no way to fix this. There's also leap second 
> command available, having no efffect on this. Everyone who owns this 
> device please check what's going on with it...
> To me this is somehow suprising, assumed this to be professional 
> grade, reliable and trouble free instrument, but obviously it's not. 
> No wonder why these are sold so cheap on Ebay (where I got mine).
> Maybe only way is to run this with 1PPS from Thunderbolt until the 
> leap second period is over.

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