[time-nuts] WWVB Time

Tom Van Baak tvb at LeapSecond.com
Tue Apr 10 17:15:43 EDT 2018


> Hi, all of a sudden my Symmetricom comparator/clock has been locking up on time.
> It has been about a week so far. Did they change the code? Anyone else seeing that?
> Doug K6JEY

Hi Doug,

That would be too good to be true. I asked NIST just now and they report: "We have not changed the code or power level. All things remain the same."

So let's debug this on your end.
- What make/model WWVB receiver are you using?
- Can you check the accuracy of the time or frequency output against GPS / GPSDO. Is it NIST accurate or a bad copy of 60 kHz?
- Did you power-up any new instrument in the past week, one that might cause 60 kHz harmonics?
- Can you check with 'scope or spectrum analyzer what your environment looks like near 60 kHz?
- Do you have a curious neighbor who is experimenting with a WWVB simulator...

/tvb

----- Original Message ----- 
From: "Doug Millar via time-nuts" <time-nuts at febo.com>
To: <time-nuts at febo.com>
Sent: Tuesday, April 10, 2018 1:23 PM
Subject: [time-nuts] WWVB Time


Hi, all of a sudden my Symmetricom comparator/clock has been locking up on time. It has been about a week so far. Did they change the code? Anyone else seeing that? Doug K6JEY
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