[time-nuts] 58503A alarm light on

Charles Steinmetz csteinmetz at yandex.com
Sat Apr 4 13:12:59 EDT 2015


Dave wrote:

>The 9.2 us/initial 24 hrs is a lot worst
>than it was a few days ago (4.9 us/initial 24 hrs), but 4.9 was unusually
>low. I have never seen it that low before

FWIW, mine generally shows 20 to 150 nS of predicted holdover 
uncertainty for the initial 24 hours.  Leveling off at 5-10uS could 
indicate a less than optimum antenna signal (if the sky view is good, 
possible multipath?), or an OCXO that isn't as stable as it should be.

Best regards,

Charles






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