[time-nuts] One of my Thunderbolts is drifting

Discussion:

David Van Horn

2018-10-02 20:08:56 UTC

After several weeks of seeing the two sine waves solidly locked, now one of my TBs is drifting.

Both instances of LH show six sattelites green, and discipline mode normal.
One shows RMS 2nS, the other 38,000+

What's wrong here?
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Mark Sims

2018-10-02 20:41:09 UTC

Permalink

Try the !h keyboard command to hard reset it back to factory defaults...
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David Van Horn

2018-10-02 20:47:26 UTC

Permalink

Nothing has been changed in the settings for weeks.
Is that the only way?

-----Original Message-----
From: time-nuts <time-nuts-***@lists.febo.com> On Behalf Of Mark Sims
Sent: Tuesday, October 2, 2018 2:41 PM
To: time-***@lists.febo.com
Subject: [time-nuts] One of my Thunderbolts is drifting

Try the !h keyboard command to hard reset it back to factory defaults...
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Bob kb8tq

2018-10-02 21:24:10 UTC

Permalink

Hi

If one shows 38,000 ns error, it’s no longer locked. It may *think* it’s doing ok, but it most certainly
is unlocked. What is the DAC voltage doing? ( in some cases the DAC takes a long time to get to
a limit and trigger an error flag).

Bob

Post by David Van Horn
After several weeks of seeing the two sine waves solidly locked, now one of my TBs is drifting.
Both instances of LH show six sattelites green, and discipline mode normal.
One shows RMS 2nS, the other 38,000+
What's wrong here?
_______________________________________________
To unsubscribe, go to http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com
and follow the instructions there.

David Van Horn

2018-10-02 22:01:31 UTC

Permalink

Ok, I did the reset, and it's much happier now.
I'll keep an eye on it.

-----Original Message-----
From: time-nuts <time-nuts-***@lists.febo.com> On Behalf Of Bob kb8tq
Sent: Tuesday, October 2, 2018 3:24 PM
To: Discussion of precise time and frequency measurement <time-***@lists.febo.com>
Subject: Re: [time-nuts] One of my Thunderbolts is drifting

Hi

If one shows 38,000 ns error, it’s no longer locked. It may *think* it’s doing ok, but it most certainly is unlocked. What is the DAC voltage doing? ( in some cases the DAC takes a long time to get to a limit and trigger an error flag).

Bob

Post by David Van Horn
After several weeks of seeing the two sine waves solidly locked, now one of my TBs is drifting.
Both instances of LH show six sattelites green, and discipline mode normal.
One shows RMS 2nS, the other 38,000+
What's wrong here?
_______________________________________________
to http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com
and follow the instructions there.

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