Spectracom - Essential Ingenuity

Why is there a 1 second time error from my GPS reference

Question

Why is there a 1 second time error from my GPS reference?

Answer

July 20, 2016
We have identified a potential one-second error in the GPS-based time calculation in some of our products related to the pending Leap Second notification in the GPS message.

This timing error is affecting many GPS Systems from different manufacturers. The identified Spectracom products affected are those equipped with the Trimble Resolution SMT GG receiver or Accutime GG smart antenna: This problem was introduced when the GPS signal started broadcasting the Leap Second notification on July 19 for activation Dec 31. The processing of this message produced a one second time jump in the Trimble receiver by immediately changing the leap second offset from 17 to 18 seconds. [How do I determine the offsets between timescales in SecureSync or NetClock 9400]

We are working directly with the Trimble engineering team on a resolution. Please contact us if you have an urgent need to correct the problem. Otherwise, we will be posting a permanent fix to the problem shortly. You can register your email address to be notified for the solution here.

The permanent fix is released and available for SecureSync/NetClock 9400 here.
The permanent fix is released and available for TSync bus-level timing boards equipped with the Trimble Resolution SMT GG receiver here.

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